note on user agents

- website-based login

AGENTS.md

@@ -44,6 +44,7 @@ explicitly authorizes a cache cleanup.
 - Prefer `use` imports over inline fully-qualified paths; only qualify inline for true one-offs or std collisions
 - TypeScript with Nx, React, Vite, Zustand, and Three.js
 - Use two spaces for indentation
+- Each Tauri command belongs in its own file module, named after the command. Keep shared state, types, and helpers in separate support modules; see the [Storyteller command conventions](crates/desktop/artcraft/src/services/storyteller/commands/AGENTS.md).
 
 ### File Layout
 

Cargo.lock

@@ -262,6 +262,7 @@ version = "0.0.1"
 dependencies = [
  "anyhow",
  "artcraft_api_defs",
+ "artcraft_client_identity",
  "backoff",
  "chrono",
  "cloudflare_errors",
@@ -282,6 +283,13 @@ dependencies = [
  "uuid_utils",
 ]
 
+[[package]]
+name = "artcraft_client_identity"
+version = "0.0.1"
+dependencies = [
+ "url",
+]
+
 [[package]]
 name = "artcraft_router"
 version = "0.0.1"
@@ -7018,6 +7026,7 @@ dependencies = [
 name = "tauri-plugin-http"
 version = "2.4.3"
 dependencies = [
+ "artcraft_client_identity",
  "bytes",
  "cookie_store 0.21.1",
  "data-url",

Cargo.toml

@@ -16,6 +16,7 @@ members = [
   "crates/api_clients/worldlabs_api_client",
   "crates/api_clients/worldlabs_consumer_client",
   "crates/desktop/artcraft",
+  "crates/lib/artcraft_client_identity",
   "crates/lib/browser_emulation",
   "crates/lib/build_metadata",
   "crates/lib/caching/memory_store",
@@ -49,6 +50,7 @@ publish = false
 [workspace.dependencies]
 artcraft_api_defs = { path = "crates/api_clients/artcraft/artcraft_api_defs" }
 artcraft_client = { path = "crates/api_clients/artcraft/artcraft_client" }
+artcraft_client_identity = { path = "crates/lib/artcraft_client_identity" }
 artcraft_router = { path = "crates/api_clients/artcraft/artcraft_router" }
 browser_emulation = { path = "crates/lib/browser_emulation" }
 cookie_store_wrapper = { path = "crates/lib/cookie_store_wrapper" }

_docs/dev_setup.md

@@ -9,21 +9,67 @@ To set up the ArtCraft development environment,  install the following:
 
 1. [Install Rust](https://doc.rust-lang.org/cargo/getting-started/installation.html).
 2. [Install npm](https://nodejs.org/en/download) or [nvm](https://github.com/nvm-sh/nvm). (Node version `v24.13.0` works at time of writing.) 
-3. [Install nx](https://nx.dev/docs/getting-started/installation). (Nx version `v22.4.5` works at time of writing.)
+3. The frontend's Nx and Vite dependencies are installed locally with npm; a global Nx installation is not required for the combined Unix launcher.
 4. [Install Tauri CLI](https://v2.tauri.app/reference/cli/). (Version `tauri-cli 2.10.0` works at time of writing.)
 
-An easy way to get started with running the app in development is to run the two commands (in separate terminals):
-
 **Mac and Linux Development** 
 
 ```bash
-# Run the frontend dev server
-./script/artcraft/unix_frontend_dev.sh
+# Start the frontend and Rust/Tauri together in one terminal
+./script/artcraft/unix_dev.sh
 
-# Run the Tauri Rust application
-./script/artcraft/unix_rust_dev.sh
+# Optionally start the free-port search at another port
+ARTCRAFT_DEV_PORT=6200 ./script/artcraft/unix_dev.sh
 ```
 
+Use the combined launcher instead of starting the two legacy dev scripts. It
+works from any working directory when invoked by its path and installs frontend
+dependencies if the local Vite installation is missing. Node.js 20+ is required.
+
+The launcher binds Vite to `127.0.0.1`, starting at port **5193** and trying
+successive ports until one is available. It leaves existing listeners alone.
+Only after the real frontend socket is bound does it start Tauri with that exact
+`devUrl`. HTTP and the HMR websocket share the selected port; Rust communicates
+through native Tauri IPC and needs no separate HTTP port. Configuration overrides
+are passed in memory, without changing the checked-in Tauri config.
+
+The native HTTP bridge normalizes loopback development origins for first-party
+API requests so an automatically selected port does not break login or media
+loading. See the [desktop session regression checks](../docs/desktop-session-regression.md)
+when changing ports, the launcher, or authentication.
+
+JavaScript, TypeScript, React, and CSS changes use Vite hot reload; compatible
+React component edits use Fast Refresh. Changes that cannot be hot-replaced
+reload the page. Rust changes use `cargo tauri dev`'s automatic **rebuild and app
+restart**, including dependent workspace crates. SQLx metadata and SQLite
+migrations are also watched. Rust reload is a process restart, so it does not
+preserve unsaved in-memory app state. See [Tauri's watch behavior](https://v2.tauri.app/develop/#reacting-to-source-code-changes).
+
+After startup, a Vite configuration restart must reuse the chosen port or report
+an error; it cannot silently switch to another port while Tauri uses an old URL.
+Ctrl-C stops this session's frontend, Rust watcher/compiler, and desktop app.
+If the Rust watcher exits, the launcher closes Vite and propagates the exit code.
+It never finds or terminates another app by name or port.
+
+The launcher retains the existing Unix defaults for `VITE_ENVIRONMENT_TYPE`,
+`SQLX_OFFLINE`, `RUSTFLAGS`, and the Linux WebKit workarounds. Explicit environment
+overrides are preserved. It uses the normal Artcraft app data and Cargo target
+directory; port separation does not create an isolated account/data profile, and
+concurrent Rust builds can wait on Cargo's build lock.
+
+To verify the launcher without compiling Rust or opening a desktop window:
+
+```bash
+node --test frontend/scripts/unix-dev.test.mjs
+```
+
+The tests use real Vite listeners and HMR, with a test-owned fake Cargo process
+tree. They cover occupied ports, simultaneous launches, React edits, shutdown,
+Rust-process failure, and watcher arguments. To verify native Rust reload, run
+the launcher, wait for the desktop window, make a Rust source edit, and check for
+a rebuild/restart in the same terminal. Frontend edits should update the webview
+without restarting the Rust process.
+
 **Windows Development**
 
 ```powershell

crates/api_clients/artcraft/artcraft_api_defs/src/users/login_challenges.rs

@@ -0,0 +1,73 @@
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use utoipa::ToSchema;
+
+#[derive(Deserialize, Serialize, ToSchema)]
+pub struct CreateLoginChallengeRequest {}
+
+#[derive(Deserialize, Serialize, ToSchema)]
+pub struct ReviewLoginChallengeRequest {
+  pub approval_token: String,
+}
+
+#[derive(Deserialize, Serialize, ToSchema)]
+pub struct DecideLoginChallengeRequest {
+  pub approval_token: String,
+  pub approve: bool,
+}
+
+#[derive(Deserialize, Serialize, ToSchema)]
+pub struct PollLoginChallengeRequest {
+  pub device_token: String,
+}
+
+#[derive(Deserialize, Serialize, ToSchema)]
+pub struct CreateLoginChallengeResponse {
+  pub success: bool,
+  pub device_token: String,
+  pub verification_url: String,
+  pub confirmation_code: String,
+  pub expires_at: DateTime<Utc>,
+  pub poll_interval_seconds: u32,
+}
+
+#[derive(Deserialize, Serialize, ToSchema)]
+pub struct ReviewLoginChallengeResponse {
+  pub success: bool,
+  pub status: LoginChallengeState,
+  pub maybe_failure_type: Option<LoginChallengeFailure>,
+  pub confirmation_code: String,
+  pub requesting_ip: String,
+  pub expires_at: DateTime<Utc>,
+  pub username: String,
+}
+
+#[derive(Deserialize, Serialize, ToSchema)]
+pub struct LoginChallengeResponse {
+  pub success: bool,
+  pub status: LoginChallengeState,
+  pub maybe_failure_type: Option<LoginChallengeFailure>,
+  /// Present only to the device after the redemption transaction commits.
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub maybe_signed_session: Option<String>,
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Deserialize, Serialize, ToSchema)]
+#[serde(rename_all = "snake_case")]
+pub enum LoginChallengeState {
+  Pending,
+  Approved,
+  Redeemed,
+  Failed,
+  #[serde(other)]
+  Unknown,
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Deserialize, Serialize, ToSchema)]
+#[serde(rename_all = "snake_case")]
+pub enum LoginChallengeFailure {
+  UserDeclined,
+  Expired,
+  #[serde(other)]
+  Unknown,
+}

crates/api_clients/artcraft/artcraft_api_defs/src/users/mod.rs

@@ -2,4 +2,5 @@ pub mod change_password;
 pub mod edit_email;
 pub mod edit_username;
 pub mod login;
-pub mod session_info;
+pub mod session_info;
+pub mod login_challenges;

crates/api_clients/artcraft/artcraft_api_defs/src/users/session_info.rs

@@ -1,11 +1,12 @@
 use crate::common::responses::user_details_light::UserDetailsLight;
 use enums::by_table::users::user_feature_flag::UserFeatureFlag;
-use serde_derive::Serialize;
+use serde_derive::{Deserialize, Serialize};
+use serde::{Deserialize as DeserializeTrait, Deserializer};
 use std::collections::BTreeSet;
 use tokens::tokens::users::UserToken;
 use utoipa::ToSchema;
 
-#[derive(Serialize, Copy, Clone, ToSchema)]
+#[derive(Serialize, Deserialize, Copy, Clone, ToSchema)]
 #[serde(rename_all = "snake_case")]
 pub enum FakeYouPlan {
   Free,
@@ -14,7 +15,7 @@ pub enum FakeYouPlan {
   Pro,
 }
 
-#[derive(Serialize, Copy, Clone, ToSchema)]
+#[derive(Serialize, Deserialize, Copy, Clone, ToSchema)]
 #[serde(rename_all = "snake_case")]
 pub enum StorytellerStreamPlan {
   Free,
@@ -23,7 +24,7 @@ pub enum StorytellerStreamPlan {
   Pro,
 }
 
-#[derive(Serialize, ToSchema)]
+#[derive(Serialize, Deserialize, ToSchema)]
 pub struct SessionUserInfo {
   pub core_info: UserDetailsLight,
 
@@ -41,6 +42,7 @@ pub struct SessionUserInfo {
   /// Collection of feature / rollout flags
   /// This is the proper place to detect if a user has access to some rollout (non-paywall) feature.
   /// NB: The BTreeSet maintains order so React doesn't introduce re-render state bugs when order changes
+  #[serde(default, deserialize_with = "deserialize_known_feature_flags")]
   pub maybe_feature_flags: BTreeSet<UserFeatureFlag>,
 
   // Premium plans:
@@ -76,7 +78,7 @@ pub struct SessionUserInfo {
   pub can_delete_users: bool,
 }
 
-#[derive(Serialize, ToSchema)]
+#[derive(Serialize, Deserialize, ToSchema)]
 pub struct SessionOnboardingState {
   /// If true, the user hasn't set their email.
   pub email_not_set: bool,
@@ -91,9 +93,18 @@ pub struct SessionOnboardingState {
   pub username_not_customized: bool,
 }
 
-#[derive(Serialize, ToSchema)]
+#[derive(Serialize, Deserialize, ToSchema)]
 pub struct SessionInfoSuccessResponse {
   pub success: bool,
   pub logged_in: bool,
   pub user: Option<SessionUserInfo>,
 }
+
+// Server rollouts may introduce flags before a desktop release understands them.
+// Ignore only unknown flag names; malformed values and authentication fields
+// still fail decoding. Unknown flags never grant a client-side capability.
+fn deserialize_known_feature_flags<'de, D>(deserializer: D) -> Result<BTreeSet<UserFeatureFlag>, D::Error>
+where D: Deserializer<'de> {
+  let names = Vec::<String>::deserialize(deserializer)?;
+  Ok(names.into_iter().filter_map(|name| UserFeatureFlag::from_str(&name).ok()).collect())
+}

crates/api_clients/artcraft/artcraft_client/AGENTS.md

@@ -0,0 +1,27 @@
+# artcraft_client
+
+Rust HTTP endpoint bindings used by the ArtCraft Tauri desktop app.
+
+## Endpoint layout
+
+- Each HTTP endpoint binding must live in its own descriptively named `.rs` file.
+  This applies to both free functions and methods implemented on a shared client.
+  Do not combine several routes into a catch-all file such as `login_challenges.rs`
+  or `password_auth.rs`.
+- Group related bindings in a directory module. Keep `mod.rs` for module declarations;
+  it must not contain endpoint implementations. For example:
+  `endpoints/users/login_challenges/create_login_challenge.rs` and
+  `endpoints/users/login_challenges/poll_login_challenge.rs`.
+- Keep each endpoint's route constant, request construction, and endpoint-specific
+  request/response types in its file. Keep shared wire types in `artcraft_api_defs`
+  or a dedicated shared type module; do not duplicate them across endpoint files.
+- Put shared HTTP transport, client setup, and common error handling in a separate
+  utility module. A transport module must not accumulate endpoint bindings.
+- Update callers to import types from their new modules when splitting bindings.
+  Preserve request methods, paths, headers, error behavior, and cookie handling.
+
+## Validation
+
+Run `cargo check --offline -p artcraft_client` for client changes. For native login
+bindings, also run `SQLX_OFFLINE=true cargo test --offline -p artcraft --lib
+login_bridge_tests`; these tests use local HTTP fixtures and temporary cookie jars.

crates/api_clients/artcraft/artcraft_client/Cargo.toml

@@ -19,6 +19,7 @@ path = "src/lib.rs"
 
 # Internal
 artcraft_api_defs.workspace = true
+artcraft_client_identity.workspace = true
 cloudflare_errors.workspace = true
 enums.workspace = true
 errors.workspace = true

crates/api_clients/artcraft/artcraft_client/src/endpoints/media_files/get_media_file.rs

@@ -29,7 +29,7 @@ pub async fn get_media_file(api_host: &ApiHost, media_file_token: &MediaFileToke
 
   debug!("Requesting {:?}", &url);
 
-  let response = http_get_anonymous(url).await?;
+  let response = http_get_anonymous(api_host, url).await?;
   let response = filter_bad_response(response).await?;
   let response_body = &response.text().await
       .map_err(|err| StorytellerError::Api(ApiError::from(err)))?;

crates/api_clients/artcraft/artcraft_client/src/endpoints/media_files/legacy_upload_media_file_from_file.rs

@@ -3,7 +3,8 @@ use crate::error::api_error::ApiError;
 use crate::error::client_error::ClientError;
 use crate::error::storyteller_error::StorytellerError;
 use crate::utils::api_host::ApiHost;
-use crate::utils::constants::{APPLICATION_JSON, USER_AGENT};
+use crate::utils::constants::APPLICATION_JSON;
+use crate::utils::storyteller_client_builder::storyteller_client_builder;
 use crate::utils::filter_bad_response::filter_bad_response;
 use crate::utils::http_get_anonymous::http_get_anonymous;
 use chrono::{DateTime, Utc};
@@ -11,7 +12,6 @@ use enums::common::generation_provider::GenerationProvider;
 use uuid_utils::uuid::generate_random_uuid;
 use log::debug;
 use reqwest::multipart::{Form, Part};
-use reqwest::Client;
 use serde_derive::{Deserialize, Serialize};
 use std::path::Path;
 use tokens::tokens::batch_generations::BatchGenerationToken;
@@ -56,8 +56,7 @@ pub async fn legacy_upload_media_file_from_file<P: AsRef<Path>>(
 
   //let mut file = File::open(path)?;
 
-  let client = Client::builder()
-      .gzip(true)
+  let client = storyteller_client_builder(args.api_host)
       .build()
       .map_err(|err| StorytellerError::Client(ClientError::from(err)))?;
 
@@ -86,7 +85,6 @@ pub async fn legacy_upload_media_file_from_file<P: AsRef<Path>>(
   }
 
   let mut request_builder = client.post(url)
-      .header("User-Agent", USER_AGENT)
       .header("Accept", APPLICATION_JSON);
   
   if let Some(creds) = args.maybe_creds {

crates/api_clients/artcraft/artcraft_client/src/endpoints/media_files/upload_image_media_file_from_bytes.rs

@@ -3,7 +3,8 @@ use crate::error::api_error::ApiError;
 use crate::error::client_error::ClientError;
 use crate::error::storyteller_error::StorytellerError;
 use crate::utils::api_host::ApiHost;
-use crate::utils::constants::{APPLICATION_JSON, USER_AGENT};
+use crate::utils::constants::APPLICATION_JSON;
+use crate::utils::storyteller_client_builder::storyteller_client_builder;
 use crate::utils::filter_bad_response::filter_bad_response;
 use crate::utils::http_get_anonymous::http_get_anonymous;
 use enums::common::generation_provider::GenerationProvider;
@@ -11,7 +12,6 @@ use chrono::{DateTime, Utc};
 use uuid_utils::uuid::generate_random_uuid;
 use log::debug;
 use reqwest::multipart::{Form, Part};
-use reqwest::Client;
 use serde_derive::{Deserialize, Serialize};
 use std::fs::File;
 use std::io::Read;
@@ -72,8 +72,7 @@ pub async fn upload_image_media_file_from_bytes(
 
   debug!("Requesting {:?}", &url);
 
-  let client = Client::builder()
-      .gzip(true)
+  let client = storyteller_client_builder(args.api_host)
       .build()
       .map_err(|err| StorytellerError::Client(ClientError::from(err)))?;
 
@@ -95,7 +94,6 @@ pub async fn upload_image_media_file_from_bytes(
   }
 
   let mut request_builder = client.post(url)
-      .header("User-Agent", USER_AGENT)
       .header("Accept", APPLICATION_JSON);
   
   if let Some(creds) = args.maybe_creds {

crates/api_clients/artcraft/artcraft_client/src/endpoints/media_files/upload_image_media_file_from_file.rs

@@ -3,7 +3,8 @@ use crate::error::api_error::ApiError;
 use crate::error::client_error::ClientError;
 use crate::error::storyteller_error::StorytellerError;
 use crate::utils::api_host::ApiHost;
-use crate::utils::constants::{APPLICATION_JSON, USER_AGENT};
+use crate::utils::constants::APPLICATION_JSON;
+use crate::utils::storyteller_client_builder::storyteller_client_builder;
 use crate::utils::filter_bad_response::filter_bad_response;
 use crate::utils::http_get_anonymous::http_get_anonymous;
 use chrono::{DateTime, Utc};
@@ -11,7 +12,6 @@ use enums::common::generation_provider::GenerationProvider;
 use uuid_utils::uuid::generate_random_uuid;
 use log::debug;
 use reqwest::multipart::{Form, Part};
-use reqwest::Client;
 use serde_derive::{Deserialize, Serialize};
 use std::path::Path;
 use tokens::tokens::batch_generations::BatchGenerationToken;
@@ -65,8 +65,7 @@ pub async fn upload_image_media_file_from_file_with_idempotency_token<P: AsRef<P
 
   //let mut file = File::open(path)?;
 
-  let client = Client::builder()
-      .gzip(true)
+  let client = storyteller_client_builder(args.api_host)
       .build()
       .map_err(|err| StorytellerError::Client(ClientError::from(err)))?;
 
@@ -95,7 +94,6 @@ pub async fn upload_image_media_file_from_file_with_idempotency_token<P: AsRef<P
   }
 
   let mut request_builder = client.post(url)
-      .header("User-Agent", USER_AGENT)
       .header("Accept", APPLICATION_JSON);
   
   if let Some(creds) = args.maybe_creds {

crates/api_clients/artcraft/artcraft_client/src/endpoints/media_files/upload_new_engine_asset_from_file.rs

@@ -1,7 +1,8 @@
 use crate::credentials::storyteller_credential_set::StorytellerCredentialSet;
 use crate::error::api_error::ApiError;
 use crate::utils::api_host::ApiHost;
-use crate::utils::constants::{APPLICATION_JSON, USER_AGENT};
+use crate::utils::constants::APPLICATION_JSON;
+use crate::utils::storyteller_client_builder::storyteller_client_builder;
 use crate::utils::filter_bad_response::filter_bad_response;
 use crate::utils::http_get_anonymous::http_get_anonymous;
 use enums::common::generation_provider::GenerationProvider;
@@ -9,7 +10,6 @@ use chrono::{DateTime, Utc};
 use uuid_utils::uuid::generate_random_uuid;
 use log::debug;
 use reqwest::multipart::{Form, Part};
-use reqwest::Client;
 use serde_derive::{Deserialize, Serialize};
 use std::path::Path;
 use tokens::tokens::batch_generations::BatchGenerationToken;
@@ -32,8 +32,7 @@ pub async fn upload_new_engine_asset_from_file<P: AsRef<Path>>(
 
   debug!("Requesting {:?}", &url);
 
-  let client = Client::builder()
-      .gzip(true)
+  let client = storyteller_client_builder(api_host)
       .build()?;
 
   let file_bytes = std::fs::read(path.as_ref())?;
@@ -49,7 +48,6 @@ pub async fn upload_new_engine_asset_from_file<P: AsRef<Path>>(
   }
 
   let mut request_builder = client.post(url)
-      .header("User-Agent", USER_AGENT)
       .header("Accept", APPLICATION_JSON);
   
   if let Some(creds) = maybe_creds {

crates/api_clients/artcraft/artcraft_client/src/endpoints/media_files/upload_video_media_file_from_file.rs

@@ -1,7 +1,8 @@
 use crate::credentials::storyteller_credential_set::StorytellerCredentialSet;
 use crate::error::api_error::ApiError;
 use crate::utils::api_host::ApiHost;
-use crate::utils::constants::{APPLICATION_JSON, USER_AGENT};
+use crate::utils::constants::APPLICATION_JSON;
+use crate::utils::storyteller_client_builder::storyteller_client_builder;
 use crate::utils::filter_bad_response::filter_bad_response;
 use crate::utils::http_get_anonymous::http_get_anonymous;
 use enums::common::generation_provider::GenerationProvider;
@@ -9,7 +10,6 @@ use chrono::{DateTime, Utc};
 use uuid_utils::uuid::generate_random_uuid;
 use log::debug;
 use reqwest::multipart::{Form, Part};
-use reqwest::Client;
 use serde_derive::{Deserialize, Serialize};
 use std::path::Path;
 use tokens::tokens::batch_generations::BatchGenerationToken;
@@ -58,8 +58,7 @@ pub async fn upload_video_media_file_from_file<P: AsRef<Path>>(
 
   debug!("Requesting {:?}", &url);
 
-  let client = Client::builder()
-      .gzip(true)
+  let client = storyteller_client_builder(args.api_host)
       .build()?;
 
   let file_bytes = std::fs::read(args.path.as_ref())?;
@@ -78,7 +77,6 @@ pub async fn upload_video_media_file_from_file<P: AsRef<Path>>(
   }
 
   let mut request_builder = client.post(url)
-      .header("User-Agent", USER_AGENT)
       .header("Accept", APPLICATION_JSON);
   
   if let Some(creds) = args.maybe_creds {

crates/api_clients/artcraft/artcraft_client/src/endpoints/mod.rs

@@ -7,3 +7,4 @@ pub mod media_files;
 pub mod prompts;
 pub mod stripe_artcraft;
 pub mod subscriptions;
+pub mod users;

crates/api_clients/artcraft/artcraft_client/src/endpoints/users/login_challenges/create_login_challenge.rs

@@ -0,0 +1,16 @@
+use artcraft_api_defs::users::login_challenges::{CreateLoginChallengeRequest, CreateLoginChallengeResponse};
+use reqwest::Method;
+
+use crate::utils::login_challenge_client::{LoginChallengeClient, LoginChallengeClientError};
+
+pub const CREATE_PATH: &str = "/v1/login_challenges/create";
+
+impl LoginChallengeClient {
+  pub async fn create(&self) -> Result<CreateLoginChallengeResponse, LoginChallengeClientError> {
+    let request = self
+      .request(Method::POST, CREATE_PATH)
+      .json(&CreateLoginChallengeRequest {});
+    let (result, _) = self.send(request, CREATE_PATH).await?;
+    Ok(result)
+  }
+}

crates/api_clients/artcraft/artcraft_client/src/endpoints/users/login_challenges/mod.rs

@@ -0,0 +1,2 @@
+pub mod create_login_challenge;
+pub mod poll_login_challenge;

crates/api_clients/artcraft/artcraft_client/src/endpoints/users/login_challenges/poll_login_challenge.rs

@@ -0,0 +1,30 @@
+use artcraft_api_defs::users::login_challenges::{LoginChallengeResponse, PollLoginChallengeRequest};
+use reqwest::Method;
+
+use crate::utils::login_challenge_client::{LoginChallengeClient, LoginChallengeClientError};
+
+pub const POLL_PATH: &str = "/v1/login_challenges/poll";
+
+// Deliberately no Debug/Serialize: the wire result contains a bearer credential.
+pub struct PollLoginChallengeResult {
+  pub response: LoginChallengeResponse,
+  pub session_set_cookie: Option<String>,
+}
+
+impl LoginChallengeClient {
+  pub async fn poll(
+    &self,
+    device_token: &str,
+  ) -> Result<PollLoginChallengeResult, LoginChallengeClientError> {
+    let request = self
+      .request(Method::POST, POLL_PATH)
+      .json(&PollLoginChallengeRequest {
+        device_token: device_token.to_owned(),
+      });
+    let (response, session_set_cookie) = self.send(request, POLL_PATH).await?;
+    Ok(PollLoginChallengeResult {
+      response,
+      session_set_cookie,
+    })
+  }
+}

crates/api_clients/artcraft/artcraft_client/src/endpoints/users/mod.rs

@@ -0,0 +1,5 @@
+pub mod login_challenges;
+pub mod password_auth_response;
+pub mod password_login;
+pub mod password_signup;
+pub mod session_info;

crates/api_clients/artcraft/artcraft_client/src/endpoints/users/password_auth_response.rs

@@ -0,0 +1,8 @@
+use serde::Deserialize;
+
+// No Debug: the response contains a bearer credential.
+#[derive(Deserialize)]
+pub struct PasswordAuthResponse {
+  pub success: bool,
+  pub signed_session: Option<String>,
+}

crates/api_clients/artcraft/artcraft_client/src/endpoints/users/password_login.rs

@@ -0,0 +1,20 @@
+use reqwest::Method;
+use serde::{Deserialize, Serialize};
+
+use crate::utils::login_challenge_client::{LoginChallengeClient, LoginChallengeClientError};
+use super::password_auth_response::PasswordAuthResponse;
+
+pub const LOGIN_PATH: &str = "/v1/login";
+
+// No Debug: the request contains credentials.
+#[derive(Deserialize, Serialize)]
+pub struct PasswordLoginRequest {
+  pub username_or_email: String,
+  pub password: String,
+}
+
+impl LoginChallengeClient {
+  pub async fn password_login(&self, request: &PasswordLoginRequest) -> Result<(PasswordAuthResponse, Option<String>), LoginChallengeClientError> {
+    self.send(self.request(Method::POST, LOGIN_PATH).json(request), LOGIN_PATH).await
+  }
+}

crates/api_clients/artcraft/artcraft_client/src/endpoints/users/password_signup.rs

@@ -0,0 +1,23 @@
+use reqwest::Method;
+use serde::{Deserialize, Serialize};
+
+use crate::utils::login_challenge_client::{LoginChallengeClient, LoginChallengeClientError};
+use super::password_auth_response::PasswordAuthResponse;
+
+pub const SIGNUP_PATH: &str = "/v1/create_account";
+
+// No Debug: the request contains credentials.
+#[derive(Deserialize, Serialize)]
+pub struct PasswordSignupRequest {
+  pub username: String,
+  pub email_address: String,
+  pub password: String,
+  pub password_confirmation: String,
+  pub signup_source: String,
+}
+
+impl LoginChallengeClient {
+  pub async fn password_signup(&self, request: &PasswordSignupRequest) -> Result<(PasswordAuthResponse, Option<String>), LoginChallengeClientError> {
+    self.send(self.request(Method::POST, SIGNUP_PATH).json(request), SIGNUP_PATH).await
+  }
+}

crates/api_clients/artcraft/artcraft_client/src/endpoints/users/session_info.rs

@@ -0,0 +1,19 @@
+use artcraft_api_defs::users::session_info::SessionInfoSuccessResponse;
+use reqwest::Method;
+
+use crate::utils::login_challenge_client::{LoginChallengeClient, LoginChallengeClientError};
+
+pub const SESSION_PATH: &str = "/v1/session";
+
+impl LoginChallengeClient {
+  pub async fn session(
+    &self,
+    signed_session: &str,
+  ) -> Result<SessionInfoSuccessResponse, LoginChallengeClientError> {
+    let request = self
+      .request(Method::GET, SESSION_PATH)
+      .header("Cookie", format!("session={signed_session}"));
+    let (result, _) = self.send(request, SESSION_PATH).await?;
+    Ok(result)
+  }
+}

crates/api_clients/artcraft/artcraft_client/src/utils/api_host.rs

@@ -1,4 +1,6 @@
 
+use artcraft_client_identity::origins::{ARTCRAFT_DESKTOP_DEVELOPMENT_ORIGIN, ARTCRAFT_DESKTOP_ORIGIN};
+
 const HTTP_SCHEME: &str = "http";
 
 const HTTPS_SCHEME: &str = "https";
@@ -27,6 +29,15 @@ impl ApiHost {
     }
   }
   
+  /// The `Origin` the desktop client declares to this API.
+  pub fn request_origin(&self) -> &'static str {
+    match self {
+      ApiHost::Storyteller => ARTCRAFT_DESKTOP_ORIGIN,
+      ApiHost::FakeYou => ARTCRAFT_DESKTOP_ORIGIN,
+      ApiHost::Localhost { .. } => ARTCRAFT_DESKTOP_DEVELOPMENT_ORIGIN,
+    }
+  }
+
   pub fn scheme(&self) -> &'static str {
     match self {
       ApiHost::Storyteller => HTTPS_SCHEME,

crates/api_clients/artcraft/artcraft_client/src/utils/basic_json_delete_request.rs

@@ -3,10 +3,10 @@ use crate::error::api_error::ApiError;
 use crate::error::client_error::ClientError;
 use crate::error::storyteller_error::StorytellerError;
 use crate::utils::api_host::ApiHost;
-use crate::utils::constants::{APPLICATION_JSON, USER_AGENT};
+use crate::utils::constants::APPLICATION_JSON;
+use crate::utils::storyteller_client_builder::storyteller_client_builder;
 use crate::utils::filter_bad_response::filter_bad_response;
 use log::{debug, info};
-use reqwest::Client;
 use serde::de::DeserializeOwned;
 use serde::{Deserialize, Serialize};
 
@@ -21,13 +21,11 @@ pub async fn basic_json_delete_request<Req: Serialize, Res: DeserializeOwned>(
 
   info!("DELETE {:?}", &url);
 
-  let client = Client::builder()
-      .gzip(true)
+  let client = storyteller_client_builder(api_host)
       .build()
       .map_err(|err| StorytellerError::Client(ClientError::from(err)))?;
 
   let mut request_builder = client.delete(url)
-      .header("User-Agent", USER_AGENT)
       .header("Accept", APPLICATION_JSON)
       .header("Content-Type", APPLICATION_JSON);
 

crates/api_clients/artcraft/artcraft_client/src/utils/basic_json_get_request.rs

@@ -3,10 +3,10 @@ use crate::error::api_error::ApiError;
 use crate::error::client_error::ClientError;
 use crate::error::storyteller_error::StorytellerError;
 use crate::utils::api_host::ApiHost;
-use crate::utils::constants::{APPLICATION_JSON, USER_AGENT};
+use crate::utils::constants::APPLICATION_JSON;
+use crate::utils::storyteller_client_builder::storyteller_client_builder;
 use crate::utils::filter_bad_response::filter_bad_response;
 use log::{debug, info};
-use reqwest::Client;
 use serde::de::DeserializeOwned;
 use serde::{Deserialize, Serialize};
 
@@ -20,13 +20,11 @@ pub async fn basic_json_get_request<Res: DeserializeOwned>(
 
   debug!("Requesting {:?}", &url);
 
-  let client = Client::builder()
-      .gzip(true)
+  let client = storyteller_client_builder(api_host)
       .build()
       .map_err(|err| StorytellerError::Client(ClientError::from(err)))?;
 
   let mut request_builder = client.get(url)
-      .header("User-Agent", USER_AGENT)
       .header("Accept", APPLICATION_JSON);
 
   if let Some(creds) = maybe_creds {

crates/api_clients/artcraft/artcraft_client/src/utils/basic_json_post_request.rs

@@ -3,10 +3,10 @@ use crate::error::api_error::ApiError;
 use crate::error::client_error::ClientError;
 use crate::error::storyteller_error::StorytellerError;
 use crate::utils::api_host::ApiHost;
-use crate::utils::constants::{APPLICATION_JSON, USER_AGENT};
+use crate::utils::constants::APPLICATION_JSON;
+use crate::utils::storyteller_client_builder::storyteller_client_builder;
 use crate::utils::filter_bad_response::filter_bad_response;
 use log::{debug, info};
-use reqwest::Client;
 use serde::de::DeserializeOwned;
 use serde::{Deserialize, Serialize};
 
@@ -30,13 +30,11 @@ pub async fn basic_json_post_request<Req: Serialize, Res: DeserializeOwned>(
     info!("Requesting {:?}", &url);
   }
 
-  let client = Client::builder()
-      .gzip(true)
+  let client = storyteller_client_builder(api_host)
       .build()
       .map_err(|err| StorytellerError::Client(ClientError::from(err)))?;
 
   let mut request_builder = client.post(url)
-      .header("User-Agent", USER_AGENT)
       .header("Accept", APPLICATION_JSON)
       .header("Content-Type", APPLICATION_JSON);
 

crates/api_clients/artcraft/artcraft_client/src/utils/basic_query_string_post_request.rs

@@ -3,11 +3,11 @@ use crate::error::api_error::ApiError;
 use crate::error::client_error::ClientError;
 use crate::error::storyteller_error::StorytellerError;
 use crate::utils::api_host::ApiHost;
-use crate::utils::constants::{APPLICATION_JSON, USER_AGENT};
+use crate::utils::constants::APPLICATION_JSON;
+use crate::utils::storyteller_client_builder::storyteller_client_builder;
 use crate::utils::filter_bad_response::filter_bad_response;
 use errors::AnyhowResult;
 use log::{debug, info};
-use reqwest::Client;
 use serde::de::DeserializeOwned;
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
@@ -26,13 +26,11 @@ pub async fn basic_query_string_post_request<Res: DeserializeOwned>(
 
   debug!("Requesting {:?}", &url);
 
-  let client = Client::builder()
-      .gzip(true)
+  let client = storyteller_client_builder(api_host)
       .build()
       .map_err(|err| StorytellerError::Client(ClientError::from(err)))?;
 
   let mut request_builder = client.post(url)
-      .header("User-Agent", USER_AGENT)
       .header("Accept", APPLICATION_JSON);
 
   if let Some(creds) = maybe_creds {

crates/api_clients/artcraft/artcraft_client/src/utils/constants.rs

@@ -1,4 +1 @@
-
-pub const USER_AGENT: &str = "storyteller-client/1.0";
-
 pub const APPLICATION_JSON : &str = "application/json";

crates/api_clients/artcraft/artcraft_client/src/utils/http_get_anonymous.rs

@@ -1,14 +1,12 @@
 use crate::error::api_error::ApiError;
-use reqwest::Client;
-const USER_AGENT: &str = "storyteller-client/1.0";
+use crate::utils::api_host::ApiHost;
+use crate::utils::storyteller_client_builder::storyteller_client_builder;
 
-pub async fn http_get_anonymous(url: String) -> Result<reqwest::Response, ApiError> {
-  let client = Client::builder()
-      .gzip(true)
+pub async fn http_get_anonymous(api_host: &ApiHost, url: String) -> Result<reqwest::Response, ApiError> {
+  let client = storyteller_client_builder(api_host)
       .build()?;
 
   let response = client.get(url)
-      .header("User-Agent", USER_AGENT)
       .header("Accept", "application/json")
       //.header("Accept-Encoding", "gzip, deflate, br")
       .send()

crates/api_clients/artcraft/artcraft_client/src/utils/login_challenge_client.rs

@@ -0,0 +1,150 @@
+use std::time::Duration;
+
+use log::{info, warn};
+use reqwest::header::SET_COOKIE;
+use reqwest::{Client, Method, RequestBuilder};
+use serde::de::DeserializeOwned;
+use url::Url;
+
+use crate::utils::api_host::ApiHost;
+use crate::utils::storyteller_client_builder::storyteller_client_builder;
+
+/// Native transport for the session bridge. No request/response bodies, cookies,
+/// or challenge credentials are logged, even at debug level. Never follows redirects.
+#[derive(Clone)]
+pub struct LoginChallengeClient {
+  client: Client,
+  api_host: ApiHost,
+}
+
+#[derive(Debug)]
+pub struct LoginChallengeClientError {
+  pub status: Option<u16>,
+  pub message: &'static str,
+}
+
+impl LoginChallengeClient {
+  pub fn new(api_host: &ApiHost) -> Result<Self, LoginChallengeClientError> {
+    let mut builder = storyteller_client_builder(api_host);
+    if matches!(api_host, ApiHost::Localhost { .. }) {
+      builder = builder.no_proxy();
+    }
+    let client = builder
+      .timeout(Duration::from_secs(15))
+      .redirect(reqwest::redirect::Policy::none())
+      .build()
+      .map_err(|_| LoginChallengeClientError::invalid("Unable to initialize login client"))?;
+    Ok(Self {
+      client,
+      api_host: api_host.clone(),
+    })
+  }
+
+  pub fn api_origin(&self) -> String {
+    self.api_host.to_api_hostname_and_scheme()
+  }
+
+  pub fn api_url(&self) -> Url {
+    Url::parse(&format!("{}/", self.api_origin())).expect("ApiHost must produce a valid origin")
+  }
+
+  pub fn allows_verification_url(&self, value: &str) -> bool {
+    let Ok(url) = Url::parse(value) else {
+      return false;
+    };
+    let origin_allowed = match self.api_host {
+      ApiHost::Localhost { .. } => ["http://localhost:4200", "http://127.0.0.1:4200", "http://localhost:4201", "http://127.0.0.1:4201"]
+        .contains(&url.origin().ascii_serialization().as_str()),
+      ApiHost::Storyteller => ["https://app.getartcraft.com", "https://getartcraft.com", "https://www.getartcraft.com"]
+        .contains(&url.origin().ascii_serialization().as_str()),
+      ApiHost::FakeYou => false,
+    };
+    origin_allowed
+      && url.username().is_empty()
+      && url.password().is_none()
+      && url.path() == "/login/desktop"
+      && url.query().is_none()
+      && url
+        .fragment()
+        .and_then(|f| f.strip_prefix("approval_token="))
+        .map(|s| {
+          s.len() == 43
+            && s
+              .bytes()
+              .all(|b| b.is_ascii_alphanumeric() || b == b'_' || b == b'-')
+        })
+        .unwrap_or(false)
+  }
+
+  pub(crate) fn request(&self, method: Method, path: &str) -> RequestBuilder {
+    self
+      .client
+      .request(method, format!("{}{path}", self.api_origin()))
+      .header("Accept", "application/json")
+  }
+
+  pub(crate) async fn send<T: DeserializeOwned>(
+    &self,
+    request: RequestBuilder,
+    path: &str,
+  ) -> Result<(T, Option<String>), LoginChallengeClientError> {
+    let origin = self.api_origin();
+    info!("Website login request: origin={} path={}", origin, path);
+    let response = request.send().await.map_err(|_| {
+      warn!(
+        "Website login network failure: origin={} path={}",
+        origin, path
+      );
+      LoginChallengeClientError::invalid("Unable to reach the login server")
+    })?;
+    let status = response.status();
+    if !status.is_success() {
+      warn!(
+        "Website login HTTP failure: origin={} path={} status={}",
+        origin,
+        path,
+        status.as_u16()
+      );
+      return Err(LoginChallengeClientError {
+        status: Some(status.as_u16()),
+        message: "Login server rejected the request",
+      });
+    }
+    let session_cookie = response
+      .headers()
+      .get_all(SET_COOKIE)
+      .iter()
+      .filter_map(|v| v.to_str().ok())
+      .find(|v| {
+        cookie::Cookie::parse(*v)
+          .map(|c| c.name() == "session")
+          .unwrap_or(false)
+      })
+      .map(str::to_owned);
+    let body = response.json().await.map_err(|_| {
+      warn!(
+        "Website login invalid response: origin={} path={}",
+        origin, path
+      );
+      LoginChallengeClientError::invalid("Invalid response from login server")
+    })?;
+    Ok((body, session_cookie))
+  }
+}
+
+impl LoginChallengeClientError {
+  pub fn invalid(message: &'static str) -> Self {
+    Self {
+      status: None,
+      message,
+    }
+  }
+}
+
+impl std::fmt::Display for LoginChallengeClientError {
+  fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+    write!(f, "{} (HTTP {:?})", self.message, self.status)
+  }
+}
+
+impl std::error::Error for LoginChallengeClientError {}

crates/api_clients/artcraft/artcraft_client/src/utils/mod.rs

@@ -4,6 +4,8 @@ pub mod basic_json_post_request;
 pub (crate) mod basic_query_string_post_request;
 pub (crate) mod filter_bad_response;
 pub (crate) mod http_get_anonymous;
+pub (crate) mod storyteller_client_builder;
 pub mod api_host;
 pub mod constants;
 pub mod status_codes;
+pub mod login_challenge_client;

crates/api_clients/artcraft/artcraft_client/src/utils/storyteller_client_builder.rs

@@ -0,0 +1,17 @@
+use artcraft_client_identity::user_agents::ARTCRAFT_DESKTOP_USER_AGENT;
+use reqwest::header::{HeaderMap, HeaderValue, ORIGIN};
+use reqwest::{Client, ClientBuilder};
+
+use crate::utils::api_host::ApiHost;
+
+/// Every request to our API is built from this so the desktop client identifies itself
+/// consistently (`User-Agent` and `Origin`). Only use it for Storyteller / ArtCraft APIs.
+pub(crate) fn storyteller_client_builder(api_host: &ApiHost) -> ClientBuilder {
+  let mut headers = HeaderMap::new();
+  headers.insert(ORIGIN, HeaderValue::from_static(api_host.request_origin()));
+
+  Client::builder()
+    .user_agent(ARTCRAFT_DESKTOP_USER_AGENT)
+    .default_headers(headers)
+    .gzip(true)
+}

crates/desktop/artcraft/.taurignore

@@ -1,4 +1,5 @@
-# Don't restart the dev server on Rust changes
-crates/
-Cargo.toml
-Cargo.lock
+# Rust sources and Cargo manifests must remain watched for `cargo tauri dev`.
+# Vite owns frontend reloads; build artifacts must not trigger Rust rebuilds.
+target/
+node_modules/
+dist/

crates/desktop/artcraft/src/core/threads/main_window_thread/persist_storyteller_cookies_task.rs

@@ -1,10 +1,10 @@
+use crate::core::state::app_env_configs::app_env_configs::AppEnvConfigs;
 use crate::core::state::app_startup_time::AppStartupTime;
 use crate::services::storyteller::state::storyteller_credential_manager::StorytellerCredentialManager;
 use anyhow::anyhow;
 use chrono::TimeDelta;
 use errors::AnyhowResult;
 use log::{error, info};
-use once_cell::sync::Lazy;
 use reqwest::Url;
 use artcraft_client::credentials::storyteller_avt_cookie::StorytellerAvtCookie;
 use artcraft_client::credentials::storyteller_credential_set::StorytellerCredentialSet;
@@ -13,24 +13,13 @@ use tauri::{AppHandle, Manager};
 use tauri_plugin_http::reqwest_cookie_store::CookieStore;
 use tauri_plugin_http::Http;
 
-const STORYTELLER_ROOT_COOKIE_URL_STR: &str = "https://api.storyteller.ai/";
-
-static STORYTELLER_ROOT_COOKIE_URL: Lazy<Url> = Lazy::new(|| {
-  Url::parse(STORYTELLER_ROOT_COOKIE_URL_STR).expect("URL should parse")
-});
-
-const AVT_COOKIE_NAME : &str = "visitor";
-const SESSION_COOKIE_NAME : &str = "session";
+const AVT_COOKIE_NAME: &str = "visitor";
+const SESSION_COOKIE_NAME: &str = "session";
 
 /// There's some kind of race condition that we need to wait for before inspecting cookies.
 const RACE_CONDITION_WAIT_TIME: TimeDelta = TimeDelta::milliseconds(5000);
 
-pub async fn persist_storyteller_cookies_task(
-  app: &AppHandle,
-  storyteller_credential_manager: &StorytellerCredentialManager,
-  app_startup_time: &AppStartupTime,
-) -> AnyhowResult<()> {
-
+pub async fn persist_storyteller_cookies_task(app: &AppHandle, storyteller_credential_manager: &StorytellerCredentialManager, app_startup_time: &AppStartupTime) -> AnyhowResult<()> {
   //if app_startup_time.time_delta_since() < RACE_CONDITION_WAIT_TIME {
   //  // NB:     There's an issue when the "main window thread" inquires about the
   //  //     webview cookies shortly after app startup. When it attempts to dump the
@@ -41,33 +30,30 @@ pub async fn persist_storyteller_cookies_task(
   //}
 
   let maybe_http = app.try_state::<Http>();
-  
+
   let http = match maybe_http {
     None => {
       error!("No HTTP plugin found");
       return Err(anyhow!("No HTTP plugin found"));
-    }
+    },
     Some(http) => http,
   };
-  
+
   match http.cookies_jar.store.lock() {
     Err(err) => {
       error!("Failed to lock cookie jar: {:?}", err);
       return Err(anyhow!("Failed to lock cookie jar"));
-    }
+    },
     Ok(cookie_jar) => {
-      sync_tauri_credentials(&cookie_jar, storyteller_credential_manager)?;
-    }
+      sync_tauri_credentials(&cookie_jar, storyteller_credential_manager, &storyteller_cookie_url(app)?)?;
+    },
   }
-  
+
   Ok(())
 }
 
-fn sync_tauri_credentials(
-  cookie_store: &CookieStore,
-  storyteller_credential_manager: &StorytellerCredentialManager,
-) -> AnyhowResult<()> {
-  let current_http_plugin_credentials = get_credentials_from_cookie_store(cookie_store)?;
+pub(crate) fn sync_tauri_credentials(cookie_store: &CookieStore, storyteller_credential_manager: &StorytellerCredentialManager, api_url: &Url) -> AnyhowResult<()> {
+  let current_http_plugin_credentials = get_credentials_from_cookie_store(cookie_store, api_url)?;
 
   let mut replace_credentials = true;
 
@@ -78,31 +64,80 @@ fn sync_tauri_credentials(
       replace_credentials = false;
     }
   }
-  
+
   if replace_credentials {
     info!("Syncing ArtCraft credentials ...");
     storyteller_credential_manager.set_credentials(&current_http_plugin_credentials)?;
     // NB: tauri-plugin-http stores the credentials on disk, so we can defer to that for now.
     //storyteller_credential_manager.persist_all_to_disk()?;
   }
-  
+
   Ok(())
 }
 
-pub fn get_credentials_from_cookie_store(cookie_jar: &CookieStore) -> AnyhowResult<StorytellerCredentialSet> {
+pub fn get_credentials_from_cookie_store(cookie_jar: &CookieStore, api_url: &Url) -> AnyhowResult<StorytellerCredentialSet> {
   let mut avt_cookie = None;
   let mut session_cookie = None;
 
-  for cookie in cookie_jar.iter_unexpired() {
-    if let Some(avt) = StorytellerAvtCookie::maybe_from_cookie(&cookie) {
-      avt_cookie = Some(avt);
-    } else if let Some(session) = StorytellerSessionCookie::maybe_from_cookie(&cookie) {
-      session_cookie = Some(session);
+  // Only cookies applicable to our API origin can become ArtCraft credentials.
+  for (name, value) in cookie_jar.get_request_values(api_url) {
+    match name {
+      AVT_COOKIE_NAME => avt_cookie = Some(StorytellerAvtCookie::new(value.to_owned())),
+      SESSION_COOKIE_NAME => session_cookie = Some(StorytellerSessionCookie::new(value.to_owned())),
+      _ => {},
     }
   }
 
-  Ok(StorytellerCredentialSet::initialize(
-    avt_cookie,
-    session_cookie,
-  ))
+  Ok(StorytellerCredentialSet::initialize(avt_cookie, session_cookie))
+}
+
+pub(crate) fn storyteller_cookie_url(app: &AppHandle) -> AnyhowResult<Url> {
+  let config = app.try_state::<AppEnvConfigs>().ok_or_else(|| anyhow!("API configuration unavailable"))?;
+  Ok(Url::parse(&format!("{}/", config.storyteller_host.to_api_hostname_and_scheme()))?)
+}
+
+#[cfg(test)]
+mod login_bridge_tests {
+  use super::*;
+  use crate::core::state::data_dir::app_data_root::AppDataRoot;
+  use tauri_plugin_http::reqwest_cookie_store::RawCookie;
+
+  #[test]
+  fn approved_response_cookie_reaches_native_credentials() {
+    let directory = tempfile::tempdir().unwrap();
+    let root = AppDataRoot::create_existing(directory.path()).unwrap();
+    let manager = StorytellerCredentialManager::initialize_empty(&root);
+    let mut jar = CookieStore::default();
+    let url = Url::parse("https://api.storyteller.ai/v1/login_challenges/poll").unwrap();
+    jar.store_response_cookies([RawCookie::parse("session=signed_backend_cookie; Secure; HttpOnly; Path=/; Max-Age=3600").unwrap().into_owned(), RawCookie::parse("visitor=existing_visitor; Secure; Path=/; Max-Age=3600").unwrap().into_owned()].into_iter(), &url);
+    sync_tauri_credentials(&jar, &manager, &url).unwrap();
+    let credentials = manager.get_credentials_required().unwrap();
+    assert_eq!(credentials.session.unwrap().as_str(), "signed_backend_cookie");
+    assert_eq!(credentials.avt.unwrap().as_str(), "existing_visitor");
+    // Retrying the same successful poll is idempotent for native credentials too.
+    sync_tauri_credentials(&jar, &manager, &url).unwrap();
+    assert_eq!(manager.get_credentials_required().unwrap().session.unwrap().as_str(), "signed_backend_cookie");
+  }
+
+  #[test]
+  fn unrelated_and_expired_cookies_cannot_become_artcraft_sessions() {
+    let url = Url::parse("https://api.storyteller.ai/").unwrap();
+    let mut jar = CookieStore::default();
+    jar.store_response_cookies([RawCookie::parse("session=unrelated; Path=/; Max-Age=3600").unwrap().into_owned()].into_iter(), &Url::parse("https://unrelated.example/").unwrap());
+    assert!(get_credentials_from_cookie_store(&jar, &url).unwrap().session.is_none());
+    jar.store_response_cookies([RawCookie::parse("session=expired; Secure; Path=/; Max-Age=0").unwrap().into_owned()].into_iter(), &url);
+    assert!(get_credentials_from_cookie_store(&jar, &url).unwrap().session.is_none());
+  }
+
+  #[test]
+  fn configured_local_api_does_not_import_production_cookies() {
+    let production = Url::parse("https://api.storyteller.ai/").unwrap();
+    let local = Url::parse("http://localhost:12345/").unwrap();
+    let mut jar = CookieStore::default();
+    jar.store_response_cookies([RawCookie::parse("session=production; Secure; Path=/").unwrap().into_owned()].into_iter(), &production);
+    assert!(get_credentials_from_cookie_store(&jar, &local).unwrap().session.is_none());
+    jar.store_response_cookies([RawCookie::parse("session=development; Path=/").unwrap().into_owned()].into_iter(), &local);
+    assert_eq!(get_credentials_from_cookie_store(&jar, &local).unwrap().session.unwrap().as_str(), "development");
+    assert_eq!(get_credentials_from_cookie_store(&jar, &production).unwrap().session.unwrap().as_str(), "production");
+  }
 }

crates/desktop/artcraft/src/lib.rs

@@ -63,6 +63,13 @@ use crate::services::sora::commands::sora_logout_command::sora_logout_command;
 use crate::services::sora::state::sora_credential_manager::SoraCredentialManager;
 use crate::services::sora::state::sora_task_queue::SoraTaskQueue;
 use crate::services::sora::threads::sora_task_polling::sora_task_polling_thread::sora_task_polling_thread;
+use crate::services::storyteller::commands::login_bridge::DesktopLoginBridgeState;
+use crate::services::storyteller::commands::storyteller_cancel_login_challenge_command::storyteller_cancel_login_challenge_command;
+use crate::services::storyteller::commands::storyteller_create_login_challenge_command::storyteller_create_login_challenge_command;
+use crate::services::storyteller::commands::storyteller_get_login_session_command::storyteller_get_login_session_command;
+use crate::services::storyteller::commands::storyteller_password_login_command::storyteller_password_login_command;
+use crate::services::storyteller::commands::storyteller_password_signup_command::storyteller_password_signup_command;
+use crate::services::storyteller::commands::storyteller_poll_login_challenge_command::storyteller_poll_login_challenge_command;
 use crate::services::storyteller::commands::storyteller_get_credits_command::storyteller_get_credits_command;
 use crate::services::storyteller::commands::storyteller_get_subscription_command::storyteller_get_subscription_command;
 use crate::services::storyteller::commands::storyteller_purge_credentials_command::storyteller_purge_credentials_command;
@@ -201,6 +208,7 @@ pub fn run() {
     })
     .manage(app_data_root)
     .manage(app_env_configs)
+    .manage(DesktopLoginBridgeState::default())
     .manage(app_preferences)
     .manage(artcraft_platform_info)
     .manage(artcraft_usage_tracker)
@@ -259,6 +267,12 @@ pub fn run() {
     set_provider_order_command,
     sora_get_credential_info_command,
     sora_logout_command,
+    storyteller_get_login_session_command,
+    storyteller_password_login_command,
+    storyteller_password_signup_command,
+    storyteller_create_login_challenge_command,
+    storyteller_poll_login_challenge_command,
+    storyteller_cancel_login_challenge_command,
     storyteller_get_credits_command,
     storyteller_get_subscription_command,
     storyteller_open_credits_purchase_command,

crates/desktop/artcraft/src/services/storyteller/commands/AGENTS.md

@@ -0,0 +1,17 @@
+# Tauri Commands
+
+- Put each `#[tauri::command]` function in its own `.rs` file module named after
+  that command, such as `storyteller_create_login_challenge_command.rs`. Do not
+  collect multiple commands in a catch-all `*_commands.rs` file.
+- Keep `mod.rs` for module declarations. Put shared state, response/error types,
+  and implementation helpers in separate support modules, with the narrowest
+  visibility needed by their callers.
+- Update the imports used by `tauri::generate_handler!` when moving commands.
+  Preserve IPC command names and arguments unless changing that contract is
+  explicitly part of the task.
+- Authentication HTTP requests run in Rust through `artcraft_client` endpoint
+  bindings. The frontend invokes Tauri commands; it does not call the API
+  directly, and desktop commands do not connect to the backend MySQL database.
+- For login bridge changes, run the existing native fixture tests with
+  `SQLX_OFFLINE=true cargo test --offline -p artcraft --lib login_bridge_tests`.
+  These tests use loopback HTTP servers and temporary cookie stores.

crates/desktop/artcraft/src/services/storyteller/commands/login_bridge.rs

@@ -0,0 +1,340 @@
+use std::collections::HashMap;
+use std::sync::Arc;
+
+use artcraft_api_defs::users::login_challenges::{LoginChallengeFailure, LoginChallengeState};
+use artcraft_api_defs::users::session_info::SessionUserInfo;
+use artcraft_client::endpoints::users::password_login::PasswordLoginRequest;
+use artcraft_client::endpoints::users::password_signup::PasswordSignupRequest;
+use artcraft_client::utils::api_host::ApiHost;
+use artcraft_client::utils::login_challenge_client::{
+  LoginChallengeClient, LoginChallengeClientError,
+};
+use chrono::{DateTime, Utc};
+use log::{info, warn};
+use serde::Serialize;
+use tauri::{AppHandle, Manager};
+use tauri_plugin_http::reqwest_cookie_store::{CookieStoreMutex, RawCookie};
+use tauri_plugin_http::Http;
+use tokio::sync::Mutex;
+use uuid_utils::uuid::generate_random_uuid;
+
+use crate::core::threads::main_window_thread::persist_storyteller_cookies_task::get_credentials_from_cookie_store;
+use crate::services::storyteller::state::storyteller_credential_manager::StorytellerCredentialManager;
+
+const MAX_PENDING_CHALLENGES: usize = 8;
+
+/// All bearer credentials stay in Rust. The UI holds only a local lookup handle.
+#[derive(Default)]
+pub struct DesktopLoginBridgeState {
+  pending: Mutex<HashMap<String, PendingChallenge>>,
+}
+
+#[derive(Clone)]
+struct PendingChallenge {
+  device_token: String,
+  expires_at: DateTime<Utc>,
+  client: LoginChallengeClient,
+}
+
+#[derive(Serialize)]
+pub struct DesktopLoginChallenge {
+  pub challenge_id: String,
+  pub verification_url: String,
+  pub confirmation_code: String,
+  pub expires_at: DateTime<Utc>,
+  pub poll_interval_seconds: u32,
+}
+
+#[derive(Serialize)]
+pub struct DesktopLoginOutcome {
+  pub status: LoginChallengeState,
+  pub maybe_failure_type: Option<LoginChallengeFailure>,
+  pub maybe_user: Option<SessionUserInfo>,
+}
+
+#[derive(Debug, Serialize)]
+pub struct DesktopLoginError {
+  pub status: Option<u16>,
+  pub message: String,
+  pub retryable: bool,
+}
+
+impl DesktopLoginError {
+  fn local(message: &str) -> Self {
+    Self {
+      status: None,
+      message: message.to_owned(),
+      retryable: false,
+    }
+  }
+
+  pub(super) fn from_client(origin: &str, error: LoginChallengeClientError) -> Self {
+    warn!(
+      "Website login failed: origin={} status={:?} reason={}",
+      origin, error.status, error.message
+    );
+    Self {
+      retryable: error
+        .status
+        .map(|s| s == 429 || s >= 500)
+        .unwrap_or(error.message == "Unable to reach the login server"),
+      status: error.status,
+      message: format!("{}: {} (HTTP {:?})", origin, error.message, error.status),
+    }
+  }
+}
+
+pub(super) async fn current_login_session(
+  client: &LoginChallengeClient,
+  jar: &Arc<CookieStoreMutex>,
+) -> Result<Option<SessionUserInfo>, DesktopLoginError> {
+  let credentials = {
+    let store = jar
+      .store
+      .lock()
+      .map_err(|_| DesktopLoginError::local("HTTP cookie store unavailable"))?;
+    get_credentials_from_cookie_store(&store, &client.api_url())
+      .map_err(|_| DesktopLoginError::local("Unable to read session cookie"))?
+  };
+  let Some(signed) = credentials.session else {
+    return Ok(None);
+  };
+  let session = match client.session(signed.as_str()).await {
+    Ok(session) => session,
+    Err(error) if error.status == Some(401) => return Ok(None),
+    Err(error) => return Err(DesktopLoginError::from_client(&client.api_origin(), error)),
+  };
+  Ok(
+    session
+      .user
+      .filter(|_| session.success && session.logged_in),
+  )
+}
+
+pub(super) async fn password_auth(
+  host: &ApiHost,
+  manager: &StorytellerCredentialManager,
+  jar: &Arc<CookieStoreMutex>,
+  login: Option<PasswordLoginRequest>,
+  signup: Option<PasswordSignupRequest>,
+) -> Result<SessionUserInfo, DesktopLoginError> {
+  let client = LoginChallengeClient::new(host)
+    .map_err(|e| DesktopLoginError::from_client(&host.to_api_hostname_and_scheme(), e))?;
+  let response = match (login, signup) {
+    (Some(request), None) => client.password_login(&request).await,
+    (None, Some(request)) => client.password_signup(&request).await,
+    _ => return Err(DesktopLoginError::local("Invalid authentication request")),
+  }
+  .map_err(|e| DesktopLoginError::from_client(&client.api_origin(), e))?;
+  let (response, cookie) = response;
+  if !response.success {
+    return Err(DesktopLoginError::local(
+      "Sign-in failed. Check your account details and try again.",
+    ));
+  }
+  let signed = response
+    .signed_session
+    .ok_or_else(|| DesktopLoginError::local("Login server did not issue a session"))?;
+  let cookie =
+    cookie.ok_or_else(|| DesktopLoginError::local("Login server did not set a session cookie"))?;
+  let (cookie, user) = verify_session(&client, &signed, cookie).await?;
+  install_session_cookie(&client, &signed, cookie, manager, jar)?;
+  persist_session_cookie(jar).await?;
+  Ok(user)
+}
+
+pub(super) fn http_cookie_jar(app: &AppHandle) -> Result<Arc<CookieStoreMutex>, DesktopLoginError> {
+  Ok(
+    app
+      .try_state::<Http>()
+      .ok_or_else(|| DesktopLoginError::local("HTTP cookie store unavailable"))?
+      .cookies_jar
+      .clone(),
+  )
+}
+
+pub(super) async fn begin_challenge(
+  host: &ApiHost,
+  state: &DesktopLoginBridgeState,
+) -> Result<DesktopLoginChallenge, DesktopLoginError> {
+  let client = LoginChallengeClient::new(host)
+    .map_err(|e| DesktopLoginError::from_client(&host.to_api_hostname_and_scheme(), e))?;
+  let created = client
+    .create()
+    .await
+    .map_err(|e| DesktopLoginError::from_client(&client.api_origin(), e))?;
+  if !created.success
+    || !client.allows_verification_url(&created.verification_url)
+    || created.device_token.len() != 43
+    || created.expires_at <= Utc::now()
+  {
+    return Err(DesktopLoginError::local(
+      "Invalid login challenge or website/API environment mismatch",
+    ));
+  }
+  let mut pending = state.pending.lock().await;
+  pending.retain(|_, value| value.expires_at > Utc::now());
+  if pending.len() >= MAX_PENDING_CHALLENGES {
+    return Err(DesktopLoginError::local("Too many pending login attempts"));
+  }
+  let challenge_id = generate_random_uuid();
+  pending.insert(
+    challenge_id.clone(),
+    PendingChallenge {
+      device_token: created.device_token,
+      expires_at: created.expires_at,
+      client,
+    },
+  );
+  Ok(DesktopLoginChallenge {
+    challenge_id,
+    verification_url: created.verification_url,
+    confirmation_code: created.confirmation_code,
+    expires_at: created.expires_at,
+    poll_interval_seconds: created.poll_interval_seconds.max(5),
+  })
+}
+
+pub(super) async fn poll_challenge(
+  state: &DesktopLoginBridgeState,
+  manager: &StorytellerCredentialManager,
+  jar: &Arc<CookieStoreMutex>,
+  challenge_id: &str,
+) -> Result<DesktopLoginOutcome, DesktopLoginError> {
+  let challenge = {
+    let mut pending = state.pending.lock().await;
+    let challenge = pending.get(challenge_id).cloned().ok_or_else(|| {
+      DesktopLoginError::local("Login attempt was cancelled or is no longer available")
+    })?;
+    if challenge.expires_at <= Utc::now() {
+      pending.remove(challenge_id);
+      return Ok(expired());
+    }
+    challenge
+  };
+  let origin = challenge.client.api_origin();
+  let polled = challenge
+    .client
+    .poll(&challenge.device_token)
+    .await
+    .map_err(|e| DesktopLoginError::from_client(&origin, e))?;
+  if !polled.response.success || polled.response.status == LoginChallengeState::Unknown {
+    return Err(DesktopLoginError::local("Unrecognized login response"));
+  }
+  if polled.response.status != LoginChallengeState::Redeemed {
+    if polled.response.status == LoginChallengeState::Failed {
+      state.pending.lock().await.remove(challenge_id);
+    }
+    return Ok(DesktopLoginOutcome {
+      status: polled.response.status,
+      maybe_failure_type: polled.response.maybe_failure_type,
+      maybe_user: None,
+    });
+  }
+  let signed = polled
+    .response
+    .maybe_signed_session
+    .ok_or_else(|| DesktopLoginError::local("Login server did not issue a session"))?;
+  let set_cookie = polled
+    .session_set_cookie
+    .ok_or_else(|| DesktopLoginError::local("Login server did not set a session cookie"))?;
+  let (cookie, user) = verify_session(&challenge.client, &signed, set_cookie).await?;
+  {
+    let pending = state.pending.lock().await;
+    // A cancellation during either HTTP request must prevent local installation.
+    if !pending.contains_key(challenge_id) {
+      return Err(DesktopLoginError::local("Login attempt was cancelled"));
+    }
+    if challenge.expires_at <= Utc::now() {
+      return Ok(expired());
+    }
+    install_session_cookie(&challenge.client, &signed, cookie, manager, jar)?;
+  }
+  // Keep the challenge for idempotent IPC retries; it expires on its original deadline.
+  persist_session_cookie(jar).await?;
+  info!("Website login complete: origin={}", origin);
+  Ok(DesktopLoginOutcome {
+    status: LoginChallengeState::Redeemed,
+    maybe_failure_type: None,
+    maybe_user: Some(user),
+  })
+}
+
+pub(super) async fn cancel_challenge(state: &DesktopLoginBridgeState, challenge_id: &str) {
+  state.pending.lock().await.remove(challenge_id);
+}
+
+async fn verify_session(
+  client: &LoginChallengeClient,
+  signed: &str,
+  set_cookie: String,
+) -> Result<(RawCookie<'static>, SessionUserInfo), DesktopLoginError> {
+  let cookie = RawCookie::parse(set_cookie)
+    .map_err(|_| DesktopLoginError::local("Invalid session cookie"))?
+    .into_owned();
+  if cookie.name() != "session" || cookie.value() != signed {
+    return Err(DesktopLoginError::local(
+      "Session cookie did not match the redeemed session",
+    ));
+  }
+  // Validate on the SAME native API host before publishing any new credentials.
+  let session = client
+    .session(&signed)
+    .await
+    .map_err(|e| DesktopLoginError::from_client(&client.api_origin(), e))?;
+  let user = session
+    .user
+    .filter(|_| session.success && session.logged_in)
+    .ok_or_else(|| DesktopLoginError::local("The redeemed session could not authenticate"))?;
+  Ok((cookie, user))
+}
+
+fn install_session_cookie(
+  client: &LoginChallengeClient,
+  signed: &str,
+  cookie: RawCookie<'static>,
+  manager: &StorytellerCredentialManager,
+  jar: &Arc<CookieStoreMutex>,
+) -> Result<(), DesktopLoginError> {
+  let mut store = jar
+    .store
+    .lock()
+    .map_err(|_| DesktopLoginError::local("HTTP cookie store unavailable"))?;
+  let mut candidate = store.clone();
+  candidate.store_response_cookies([cookie].into_iter(), &client.api_url());
+  let credentials = get_credentials_from_cookie_store(&candidate, &client.api_url())
+    .map_err(|_| DesktopLoginError::local("Unable to read session cookie"))?;
+  if credentials.session.as_ref().map(|c| c.as_str()) != Some(signed) {
+    return Err(DesktopLoginError::local(
+      "Session cookie does not apply to the configured API host",
+    ));
+  }
+  manager
+    .set_credentials(&credentials)
+    .map_err(|_| DesktopLoginError::local("Unable to store native login credentials"))?;
+  *store = candidate;
+  Ok(())
+}
+
+async fn persist_session_cookie(jar: &Arc<CookieStoreMutex>) -> Result<(), DesktopLoginError> {
+  let saved = jar
+    .request_save()
+    .map_err(|_| DesktopLoginError::local("Unable to persist login cookie"))?;
+  tokio::task::spawn_blocking(move || saved.recv())
+    .await
+    .map_err(|_| DesktopLoginError::local("Unable to persist login cookie"))?
+    .map_err(|_| DesktopLoginError::local("Unable to persist login cookie"))?;
+  Ok(())
+}
+
+fn expired() -> DesktopLoginOutcome {
+  DesktopLoginOutcome {
+    status: LoginChallengeState::Failed,
+    maybe_failure_type: Some(LoginChallengeFailure::Expired),
+    maybe_user: None,
+  }
+}
+
+#[cfg(test)]
+#[path = "storyteller_login_bridge_tests.rs"]
+mod login_bridge_tests;

crates/desktop/artcraft/src/services/storyteller/commands/mod.rs

@@ -2,4 +2,11 @@ pub mod storyteller_purge_credentials_command;
 pub mod storyteller_get_credits_command;
 pub mod storyteller_get_subscription_command;
 pub mod stripe_checkout;
-pub mod stripe_customer_portal;
+pub mod stripe_customer_portal;
+pub(crate) mod login_bridge;
+pub mod storyteller_cancel_login_challenge_command;
+pub mod storyteller_create_login_challenge_command;
+pub mod storyteller_get_login_session_command;
+pub mod storyteller_password_login_command;
+pub mod storyteller_password_signup_command;
+pub mod storyteller_poll_login_challenge_command;

crates/desktop/artcraft/src/services/storyteller/commands/storyteller_cancel_login_challenge_command.rs

@@ -0,0 +1,14 @@
+use tauri::State;
+
+use crate::services::storyteller::commands::login_bridge::{
+  cancel_challenge, DesktopLoginBridgeState, DesktopLoginError,
+};
+
+#[tauri::command]
+pub async fn storyteller_cancel_login_challenge_command(
+  state: State<'_, DesktopLoginBridgeState>,
+  challenge_id: String,
+) -> Result<(), DesktopLoginError> {
+  cancel_challenge(&state, &challenge_id).await;
+  Ok(())
+}

crates/desktop/artcraft/src/services/storyteller/commands/storyteller_create_login_challenge_command.rs

@@ -0,0 +1,14 @@
+use tauri::State;
+
+use crate::core::state::app_env_configs::app_env_configs::AppEnvConfigs;
+use crate::services::storyteller::commands::login_bridge::{
+  begin_challenge, DesktopLoginBridgeState, DesktopLoginChallenge, DesktopLoginError,
+};
+
+#[tauri::command]
+pub async fn storyteller_create_login_challenge_command(
+  config: State<'_, AppEnvConfigs>,
+  state: State<'_, DesktopLoginBridgeState>,
+) -> Result<DesktopLoginChallenge, DesktopLoginError> {
+  begin_challenge(&config.storyteller_host, &state).await
+}

crates/desktop/artcraft/src/services/storyteller/commands/storyteller_get_login_session_command.rs

@@ -0,0 +1,19 @@
+use artcraft_api_defs::users::session_info::SessionUserInfo;
+use artcraft_client::utils::login_challenge_client::LoginChallengeClient;
+use tauri::{AppHandle, State};
+
+use crate::core::state::app_env_configs::app_env_configs::AppEnvConfigs;
+use crate::services::storyteller::commands::login_bridge::{
+  current_login_session, http_cookie_jar, DesktopLoginError,
+};
+
+#[tauri::command]
+pub async fn storyteller_get_login_session_command(
+  app: AppHandle,
+  config: State<'_, AppEnvConfigs>,
+) -> Result<Option<SessionUserInfo>, DesktopLoginError> {
+  let client = LoginChallengeClient::new(&config.storyteller_host).map_err(|error| {
+    DesktopLoginError::from_client(&config.storyteller_host.to_api_hostname_and_scheme(), error)
+  })?;
+  current_login_session(&client, &http_cookie_jar(&app)?).await
+}

crates/desktop/artcraft/src/services/storyteller/commands/storyteller_login_bridge_tests.rs

@@ -0,0 +1,436 @@
+//! Commands' native implementation + real ArtCraft bindings + loopback HTTP.
+//! All listeners bind to an ephemeral local port; no production host is contacted.
+use super::*;
+use crate::core::state::data_dir::app_data_root::AppDataRoot;
+use artcraft_client::credentials::storyteller_avt_cookie::StorytellerAvtCookie;
+use artcraft_client::credentials::storyteller_credential_set::StorytellerCredentialSet;
+use serde_json::{json, Value};
+use std::io::{Read, Write};
+use std::net::TcpListener;
+use std::thread;
+use std::time::Duration;
+use tauri_plugin_http::reqwest_cookie_store::CookieStore;
+
+const SIGNED: &str = "signed_native_session_fixture";
+const DEVICE: &str = "DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD";
+
+#[tokio::test]
+async fn approved_session_is_verified_installed_persisted_and_retried_entirely_in_rust() {
+  let server = server(vec![
+    create(),
+    pending(),
+    redeemed(),
+    session(),
+    redeemed(),
+    session(),
+  ]);
+  let h = harness();
+  // Native installation must preserve visitor cookies and avoid importing other origins.
+  h.jar.store.lock().unwrap().store_response_cookies(
+    [RawCookie::parse("visitor=existing; Path=/; Max-Age=3600")
+      .unwrap()
+      .into_owned()]
+    .into_iter(),
+    &server_url(&server),
+  );
+  h.manager
+    .set_credentials(&StorytellerCredentialSet::initialize_with_just_avt(
+      StorytellerAvtCookie::new("existing".into()),
+    ))
+    .unwrap();
+  let created = begin_challenge(&server.host, &h.state).await.unwrap();
+  let public = serde_json::to_string(&created).unwrap();
+  assert!(!public.contains(DEVICE));
+  assert!(!public.contains("device_token"));
+  assert!(h
+    .manager
+    .get_credentials_required()
+    .unwrap()
+    .session
+    .is_none());
+  let wait = poll_challenge(&h.state, &h.manager, &h.jar, &created.challenge_id)
+    .await
+    .unwrap();
+  assert_eq!(wait.status, LoginChallengeState::Pending);
+  assert!(h
+    .manager
+    .get_credentials_required()
+    .unwrap()
+    .session
+    .is_none());
+  for _ in 0..2 {
+    let result = poll_challenge(&h.state, &h.manager, &h.jar, &created.challenge_id)
+      .await
+      .unwrap();
+    assert_eq!(result.status, LoginChallengeState::Redeemed);
+    assert_eq!(result.maybe_user.as_ref().unwrap().username, "google_user");
+    // This was the real failure: use_qt exists on the server, not this desktop.
+    let flags = &result.maybe_user.as_ref().unwrap().maybe_feature_flags;
+    assert_eq!(flags.len(), 1);
+    assert_eq!(flags.first().unwrap().to_str(), "studio");
+    assert!(!serde_json::to_string(&result).unwrap().contains(SIGNED));
+    let credentials = h.manager.get_credentials_required().unwrap();
+    assert_eq!(credentials.session.unwrap().as_str(), SIGNED);
+    assert_eq!(credentials.avt.unwrap().as_str(), "existing");
+    assert!(std::fs::read_to_string(&h.jar.path)
+      .unwrap()
+      .contains(SIGNED));
+  }
+  server.thread.join().unwrap();
+}
+
+#[tokio::test]
+async fn rejection_and_timeout_never_install_a_session() {
+  for expired in [false, true] {
+    let mut steps = vec![create()];
+    if !expired {
+      steps.push(step(
+        "/v1/login_challenges/poll",
+        json!({"success":true,"status":"failed","maybe_failure_type":"user_declined"}),
+      ));
+    }
+    let server = server(steps);
+    let h = harness();
+    let created = begin_challenge(&server.host, &h.state).await.unwrap();
+    if expired {
+      h.state
+        .pending
+        .lock()
+        .await
+        .get_mut(&created.challenge_id)
+        .unwrap()
+        .expires_at = Utc::now();
+    }
+    let result = poll_challenge(&h.state, &h.manager, &h.jar, &created.challenge_id)
+      .await
+      .unwrap();
+    assert_eq!(result.status, LoginChallengeState::Failed);
+    assert_eq!(
+      result.maybe_failure_type,
+      Some(if expired {
+        LoginChallengeFailure::Expired
+      } else {
+        LoginChallengeFailure::UserDeclined
+      })
+    );
+    assert!(h.manager.get_credentials().unwrap().is_none());
+    assert!(h
+      .jar
+      .store
+      .lock()
+      .unwrap()
+      .iter_unexpired()
+      .next()
+      .is_none());
+    server.thread.join().unwrap();
+  }
+}
+
+#[tokio::test]
+async fn invalid_downstream_session_is_not_installed_and_error_has_host_without_credentials() {
+  let mut invalid = session();
+  invalid.status = 401;
+  invalid.body = json!({"echo": SIGNED});
+  let server = server(vec![create(), redeemed(), invalid]);
+  let h = harness();
+  let created = begin_challenge(&server.host, &h.state).await.unwrap();
+  let error = poll_challenge(&h.state, &h.manager, &h.jar, &created.challenge_id)
+    .await
+    .err()
+    .unwrap();
+  assert_eq!(error.status, Some(401));
+  assert!(!error.retryable);
+  assert!(error
+    .message
+    .contains(&server.host.to_api_hostname_and_scheme()));
+  assert!(!format!("{error:?}").contains(SIGNED));
+  assert!(h.manager.get_credentials().unwrap().is_none());
+  assert!(h
+    .jar
+    .store
+    .lock()
+    .unwrap()
+    .iter_unexpired()
+    .next()
+    .is_none());
+  server.thread.join().unwrap();
+}
+
+#[tokio::test]
+async fn cancelling_during_http_prevents_late_cookie_installation() {
+  let mut delayed = redeemed();
+  delayed.delay = Duration::from_millis(150);
+  let server = server(vec![create(), delayed, session()]);
+  let h = harness();
+  let created = begin_challenge(&server.host, &h.state).await.unwrap();
+  let (result, _) = tokio::join!(
+    poll_challenge(&h.state, &h.manager, &h.jar, &created.challenge_id),
+    async {
+      tokio::time::sleep(Duration::from_millis(30)).await;
+      cancel_challenge(&h.state, &created.challenge_id).await;
+    }
+  );
+  assert!(result.is_err());
+  assert!(h.manager.get_credentials().unwrap().is_none());
+  assert!(h
+    .jar
+    .store
+    .lock()
+    .unwrap()
+    .iter_unexpired()
+    .next()
+    .is_none());
+  server.thread.join().unwrap();
+}
+
+#[tokio::test]
+async fn unknown_states_and_redirects_fail_closed() {
+  for redirect in [false, true] {
+    let mut result = step(
+      "/v1/login_challenges/poll",
+      json!({"success":true,"status":"future_state","maybe_signed_session":SIGNED}),
+    );
+    if redirect {
+      result.status = 302;
+      result.headers = "Location: https://must-never-be-contacted.invalid/\r\n".into();
+    }
+    let server = server(vec![create(), result]);
+    let h = harness();
+    let created = begin_challenge(&server.host, &h.state).await.unwrap();
+    let error = poll_challenge(&h.state, &h.manager, &h.jar, &created.challenge_id)
+      .await
+      .err()
+      .unwrap();
+    assert!(!error.retryable);
+    if redirect {
+      assert_eq!(error.status, Some(302));
+    }
+    assert!(h.manager.get_credentials().unwrap().is_none());
+    server.thread.join().unwrap();
+  }
+}
+
+#[test]
+fn website_origin_must_match_native_api_environment() {
+  let local = LoginChallengeClient::new(&ApiHost::Localhost { port: 12345 }).unwrap();
+  let prod = LoginChallengeClient::new(&ApiHost::Storyteller).unwrap();
+  let fragment = format!("#approval_token={}", "A".repeat(43));
+  assert!(local.allows_verification_url(&format!("http://localhost:4201/login/desktop{fragment}")));
+  assert!(!local.allows_verification_url(&format!(
+    "https://app.getartcraft.com/login/desktop{fragment}"
+  )));
+  assert!(prod.allows_verification_url(&format!(
+    "https://app.getartcraft.com/login/desktop{fragment}"
+  )));
+  assert!(!prod.allows_verification_url(&format!("http://localhost:4201/login/desktop{fragment}")));
+}
+
+#[tokio::test]
+async fn malformed_session_data_still_cannot_install_credentials() {
+  for (field, value) in [("maybe_feature_flags", json!([42])), ("username", Value::Null)] {
+    let mut invalid = session();
+    invalid.body["user"][field] = value;
+    let server = server(vec![create(), redeemed(), invalid]);
+    let h = harness();
+    let created = begin_challenge(&server.host, &h.state).await.unwrap();
+    assert!(poll_challenge(&h.state, &h.manager, &h.jar, &created.challenge_id).await.is_err());
+    assert!(h.manager.get_credentials().unwrap().is_none());
+    assert!(h.jar.store.lock().unwrap().iter_unexpired().next().is_none());
+    server.thread.join().unwrap();
+  }
+}
+
+#[tokio::test]
+async fn password_login_and_signup_verify_persist_and_recheck_via_native_api() {
+  for signup in [false, true] {
+    let mut auth = redeemed();
+    auth.path = if signup { "/v1/create_account" } else { "/v1/login" };
+    auth.body = json!({"success":true,"signed_session":SIGNED});
+    let server = server(vec![auth, session(), session()]);
+    let h = harness();
+    let (login, signup) = if signup {
+      (None, Some(PasswordSignupRequest { username: "google_user".into(), email_address: "user@example.test".into(), password: "fixture_password".into(), password_confirmation: "fixture_password".into(), signup_source: "artcraft".into() }))
+    } else {
+      (Some(PasswordLoginRequest { username_or_email: "google_user".into(), password: "fixture_password".into() }), None)
+    };
+    let user = password_auth(&server.host, &h.manager, &h.jar, login, signup).await.unwrap();
+    assert_eq!(user.username, "google_user");
+    assert_eq!(h.manager.get_credentials_required().unwrap().session.unwrap().as_str(), SIGNED);
+    assert!(std::fs::read_to_string(&h.jar.path).unwrap().contains(SIGNED));
+    let client = LoginChallengeClient::new(&server.host).unwrap();
+    assert_eq!(current_login_session(&client, &h.jar).await.unwrap().unwrap().username, "google_user");
+    server.thread.join().unwrap();
+  }
+}
+
+#[tokio::test]
+async fn empty_native_cookie_jar_needs_no_session_http_request() {
+  let h = harness();
+  let client = LoginChallengeClient::new(&ApiHost::Localhost { port: 1 }).unwrap();
+  assert!(current_login_session(&client, &h.jar).await.unwrap().is_none());
+}
+
+struct Harness {
+  _directory: tempfile::TempDir,
+  state: DesktopLoginBridgeState,
+  manager: StorytellerCredentialManager,
+  jar: Arc<CookieStoreMutex>,
+}
+
+struct Server {
+  host: ApiHost,
+  thread: thread::JoinHandle<()>,
+}
+
+struct Step {
+  path: &'static str,
+  status: u16,
+  body: Value,
+  headers: String,
+  delay: Duration,
+}
+
+fn harness() -> Harness {
+  let directory = tempfile::tempdir().unwrap();
+  let root = AppDataRoot::create_existing(directory.path()).unwrap();
+  let manager = StorytellerCredentialManager::initialize_empty(&root);
+  let jar = Arc::new(CookieStoreMutex::new(
+    directory.path().join("cookies.json"),
+    CookieStore::default(),
+  ));
+  Harness {
+    _directory: directory,
+    state: DesktopLoginBridgeState::default(),
+    manager,
+    jar,
+  }
+}
+
+fn server_url(server: &Server) -> reqwest::Url {
+  reqwest::Url::parse(&format!("{}/", server.host.to_api_hostname_and_scheme())).unwrap()
+}
+
+fn server(steps: Vec<Step>) -> Server {
+  let listener = TcpListener::bind("127.0.0.1:0").unwrap();
+  let port = listener.local_addr().unwrap().port();
+  let thread = thread::spawn(move || {
+    for step in steps {
+      let (mut stream, _) = listener.accept().unwrap();
+      stream
+        .set_read_timeout(Some(Duration::from_secs(10)))
+        .unwrap();
+      let mut data = Vec::new();
+      let mut buffer = [0; 4096];
+      loop {
+        let count = stream.read(&mut buffer).unwrap();
+        assert!(count > 0);
+        data.extend_from_slice(&buffer[..count]);
+        if let Some(end) = data.windows(4).position(|v| v == b"\r\n\r\n") {
+          let headers = String::from_utf8_lossy(&data[..end]).to_lowercase();
+          let length: usize = headers
+            .lines()
+            .find_map(|s| s.strip_prefix("content-length:"))
+            .map(|s| s.trim().parse().unwrap())
+            .unwrap_or(0);
+          if data.len() >= end + 4 + length {
+            break;
+          }
+        }
+      }
+      let request = String::from_utf8(data).unwrap();
+      assert_eq!(request.split_whitespace().nth(1), Some(step.path));
+      assert!(request
+        .to_lowercase()
+        .contains(&format!("host: localhost:{port}")));
+      if step.path == "/v1/session" {
+        assert!(request.starts_with("GET "));
+        assert!(request.contains(&format!("session={SIGNED}")));
+      } else {
+        assert!(request.starts_with("POST "));
+        assert!(!request.to_lowercase().contains("cookie:"));
+        if step.path.ends_with("/poll") {
+          let body: Value =
+            serde_json::from_str(request.split_once("\r\n\r\n").unwrap().1).unwrap();
+          assert_eq!(body, json!({"device_token":DEVICE}));
+        }
+      }
+      thread::sleep(step.delay);
+      let body = step.body.to_string();
+      write!(stream, "HTTP/1.1 {} Test\r\nContent-Type: application/json\r\nContent-Length: {}\r\nConnection: close\r\n{}\r\n{}", step.status, body.len(), step.headers, body).unwrap();
+    }
+  });
+  Server {
+    host: ApiHost::Localhost { port: port.into() },
+    thread,
+  }
+}
+
+fn step(path: &'static str, body: Value) -> Step {
+  Step {
+    path,
+    body,
+    status: 200,
+    headers: String::new(),
+    delay: Duration::ZERO,
+  }
+}
+
+fn create() -> Step {
+  step(
+    "/v1/login_challenges/create",
+    json!({"success":true,"device_token":DEVICE,"verification_url":format!("http://localhost:4201/login/desktop#approval_token={}","A".repeat(43)),"confirmation_code":"WDJBMJHT","expires_at":Utc::now()+chrono::Duration::minutes(20),"poll_interval_seconds":5}),
+  )
+}
+
+fn pending() -> Step {
+  step(
+    "/v1/login_challenges/poll",
+    json!({"success":true,"status":"pending","maybe_failure_type":null}),
+  )
+}
+
+fn redeemed() -> Step {
+  let mut response = step(
+    "/v1/login_challenges/poll",
+    json!({"success":true,"status":"redeemed","maybe_failure_type":null,"maybe_signed_session":SIGNED}),
+  );
+  response.headers = format!("Set-Cookie: session={SIGNED}; HttpOnly; Path=/; Max-Age=3600\r\n");
+  response
+}
+
+fn session() -> Step {
+  let mut user = json!({
+    "user_token":"u_native_test", "username":"google_user", "display_name":"Google User", "email_gravatar_hash":"fixture",
+    "core_info":{"user_token":"u_native_test","username":"google_user","display_name":"Google User","gravatar_hash":"fixture","default_avatar":{"image_index":1,"color_index":1}},
+    "onboarding":{"email_not_set":false,"email_not_confirmed":false,"password_not_set":true,"username_not_customized":false},
+    "maybe_feature_flags":["studio", "use_qt", "future_server_flag"],"fakeyou_plan":"free","storyteller_stream_plan":"free"
+  });
+  for field in [
+    "can_access_studio",
+    "can_use_tts",
+    "can_use_w2l",
+    "can_delete_own_tts_results",
+    "can_delete_own_w2l_results",
+    "can_delete_own_account",
+    "can_upload_tts_models",
+    "can_upload_w2l_templates",
+    "can_delete_own_tts_models",
+    "can_delete_own_w2l_templates",
+    "can_approve_w2l_templates",
+    "can_edit_other_users_profiles",
+    "can_edit_other_users_tts_models",
+    "can_edit_other_users_w2l_templates",
+    "can_delete_other_users_tts_models",
+    "can_delete_other_users_w2l_templates",
+    "can_delete_other_users_tts_results",
+    "can_delete_other_users_w2l_results",
+    "can_ban_users",
+    "can_delete_users",
+  ] {
+    user[field] = json!(false);
+  }
+  step(
+    "/v1/session",
+    json!({"success":true,"logged_in":true,"user":user}),
+  )
+}

crates/desktop/artcraft/src/services/storyteller/commands/storyteller_password_login_command.rs

@@ -0,0 +1,26 @@
+use artcraft_api_defs::users::session_info::SessionUserInfo;
+use artcraft_client::endpoints::users::password_login::PasswordLoginRequest;
+use tauri::{AppHandle, State};
+
+use crate::core::state::app_env_configs::app_env_configs::AppEnvConfigs;
+use crate::services::storyteller::commands::login_bridge::{
+  http_cookie_jar, password_auth, DesktopLoginError,
+};
+use crate::services::storyteller::state::storyteller_credential_manager::StorytellerCredentialManager;
+
+#[tauri::command]
+pub async fn storyteller_password_login_command(
+  app: AppHandle,
+  config: State<'_, AppEnvConfigs>,
+  manager: State<'_, StorytellerCredentialManager>,
+  request: PasswordLoginRequest,
+) -> Result<SessionUserInfo, DesktopLoginError> {
+  password_auth(
+    &config.storyteller_host,
+    &manager,
+    &http_cookie_jar(&app)?,
+    Some(request),
+    None,
+  )
+  .await
+}

crates/desktop/artcraft/src/services/storyteller/commands/storyteller_password_signup_command.rs

@@ -0,0 +1,26 @@
+use artcraft_api_defs::users::session_info::SessionUserInfo;
+use artcraft_client::endpoints::users::password_signup::PasswordSignupRequest;
+use tauri::{AppHandle, State};
+
+use crate::core::state::app_env_configs::app_env_configs::AppEnvConfigs;
+use crate::services::storyteller::commands::login_bridge::{
+  http_cookie_jar, password_auth, DesktopLoginError,
+};
+use crate::services::storyteller::state::storyteller_credential_manager::StorytellerCredentialManager;
+
+#[tauri::command]
+pub async fn storyteller_password_signup_command(
+  app: AppHandle,
+  config: State<'_, AppEnvConfigs>,
+  manager: State<'_, StorytellerCredentialManager>,
+  request: PasswordSignupRequest,
+) -> Result<SessionUserInfo, DesktopLoginError> {
+  password_auth(
+    &config.storyteller_host,
+    &manager,
+    &http_cookie_jar(&app)?,
+    None,
+    Some(request),
+  )
+  .await
+}

crates/desktop/artcraft/src/services/storyteller/commands/storyteller_poll_login_challenge_command.rs

@@ -0,0 +1,17 @@
+use tauri::{AppHandle, State};
+
+use crate::services::storyteller::commands::login_bridge::{
+  http_cookie_jar, poll_challenge, DesktopLoginBridgeState, DesktopLoginError, DesktopLoginOutcome,
+};
+use crate::services::storyteller::state::storyteller_credential_manager::StorytellerCredentialManager;
+
+#[tauri::command]
+pub async fn storyteller_poll_login_challenge_command(
+  app: AppHandle,
+  state: State<'_, DesktopLoginBridgeState>,
+  manager: State<'_, StorytellerCredentialManager>,
+  challenge_id: String,
+) -> Result<DesktopLoginOutcome, DesktopLoginError> {
+  let jar = http_cookie_jar(&app)?;
+  poll_challenge(&state, &manager, &jar, &challenge_id).await
+}

crates/desktop/artcraft/src/services/storyteller/threads/storyteller_activity_thread.rs

@@ -3,9 +3,10 @@ use crate::core::state::artcraft_platform_info::ArtcraftPlatformInfo;
 use crate::core::state::artcraft_usage_tracker::artcraft_usage_tracker::ArtcraftUsageTracker;
 use crate::services::storyteller::state::storyteller_credential_manager::StorytellerCredentialManager;
 use anyhow::anyhow;
-use artcraft_api_defs::analytics::log_active_user::LogAppActiveUserRequest;
+use artcraft_api_defs::analytics::log_active_user::{LogAppActiveUserRequest, LOG_ACTIVE_USER_V2_PATH};
 use artcraft_client::endpoints::analytics::log_active_user_v2::log_active_user_v2;
 use artcraft_client::error::api_error::ApiError;
+use artcraft_client::credentials::storyteller_credential_set::StorytellerCredentialSet;
 use artcraft_client::error::storyteller_error::StorytellerError;
 use errors::AnyhowResult;
 use log::{debug, error, info};
@@ -38,7 +39,7 @@ pub async fn storyteller_activity_thread(
       &app_session_token,
     ).await;
     if let Err(err) = res {
-      error!("An error occurred: {:?}", err);
+      error!("Activity request failed: origin={} path={} error={:?}", app_env_configs.storyteller_host.to_api_hostname_and_scheme(), LOG_ACTIVE_USER_V2_PATH, err);
     }
     // NB: Sleep if an error occurs.
     tokio::time::sleep(std::time::Duration::from_millis(ERROR_SLEEP_MILLIS)).await;
@@ -62,7 +63,7 @@ async fn polling_loop(
         continue;
       }
       Some(creds) => {
-        if creds.is_empty() {
+        if !has_activity_session(&creds) {
           tokio::time::sleep(std::time::Duration::from_millis(5_000)).await;
           continue;
         }
@@ -123,7 +124,31 @@ async fn polling_loop(
     };
 
     // Wait at least a minute, no matter what the server tells us.
-    let wait_millis = std::cmp::min(wait_millis, 60_000);
+    let wait_millis = std::cmp::max(wait_millis, 60_000);
     tokio::time::sleep(std::time::Duration::from_millis(wait_millis)).await;
   }
 }
+
+// Anonymous visitor tracking is not authentication for active_user_v2.
+fn has_activity_session(creds: &StorytellerCredentialSet) -> bool {
+  creds.session.as_ref().map(|session| !session.as_str().is_empty()).unwrap_or(false)
+}
+
+#[cfg(test)]
+mod login_bridge_tests {
+  use super::has_activity_session;
+  use artcraft_client::credentials::storyteller_credential_set::StorytellerCredentialSet;
+  use artcraft_client::credentials::storyteller_avt_cookie::StorytellerAvtCookie;
+  use artcraft_client::credentials::storyteller_session_cookie::StorytellerSessionCookie;
+
+  #[test]
+  fn anonymous_visitor_cookie_does_not_authorize_activity_requests() {
+    assert!(!has_activity_session(&StorytellerCredentialSet::empty()));
+    let visitor_only = StorytellerCredentialSet::initialize_with_just_avt(StorytellerAvtCookie::new("visitor_fixture".into()));
+    assert!(!has_activity_session(&visitor_only));
+    let empty_session = StorytellerCredentialSet::initialize_with_just_cookie(StorytellerSessionCookie::new(String::new()));
+    assert!(!has_activity_session(&empty_session));
+    let signed_in = StorytellerCredentialSet::initialize_with_just_cookie(StorytellerSessionCookie::new("signed_session_fixture".into()));
+    assert!(has_activity_session(&signed_in));
+  }
+}

crates/desktop/artcraft/src/version.rs

@@ -1,4 +1,4 @@
 
 /// The version of the ArtCraft desktop app reported in the UI and via Analytics.
 /// This should match the CI builds.
-pub const ARTCRAFT_VERSION: &str = "0.39.0";
+pub const ARTCRAFT_VERSION: &str = "0.41.0";

crates/desktop/artcraft/tauri-mac.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2.0.0-rc",
   "productName": "ArtCraft",
-  "version": "0.39.0",
+  "version": "0.41.0",
   "identifier": "ai.artcraft.app",
   "build": {
     "frontendDist": "../../../frontend/apps/artcraft/dist",

crates/desktop/artcraft/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2.0.0-rc",
   "productName": "ArtCraft",
-  "version": "0.39.0",
+  "version": "0.41.0",
   "identifier": "ai.artcraft.app",
   "build": {
     "frontendDist": "../../../frontend/apps/artcraft/dist",

crates/lib/artcraft_client_identity/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "artcraft_client_identity"
+edition = "2024"
+version = "0.0.1"
+publish = false
+
+[lib]
+name = "artcraft_client_identity"
+path = "src/lib.rs"
+
+[dependencies]
+
+# External
+url.workspace = true
+
+[dev-dependencies]
+# (None)

crates/lib/artcraft_client_identity/src/destination.rs

@@ -0,0 +1,166 @@
+use url::{Host, Url};
+
+use crate::origins::{ARTCRAFT_DESKTOP_DEVELOPMENT_ORIGIN, ARTCRAFT_DESKTOP_ORIGIN};
+use crate::third_party_provider::{ThirdPartyProvider, THIRD_PARTY_PROVIDERS};
+
+/// Hostnames of our deployed APIs (HTTPS only).
+const ARTCRAFT_API_HOSTNAMES: [&str; 3] = [
+  "api.storyteller.ai",
+  "api.getartcraft.com",
+  "api.fakeyou.com",
+];
+
+/// Domains we own. Subdomains match too (CDNs, uploads, websites).
+const ARTCRAFT_DOMAINS: [&str; 4] = [
+  "storyteller.ai",
+  "getartcraft.com",
+  "fakeyou.com",
+  "artcraft.ai",
+];
+
+/// Who a request is going to, which decides how the desktop app identifies itself.
+#[derive(Debug, PartialEq, Eq)]
+pub enum Destination {
+  /// Our HTTP API, deployed or running locally, and the `Origin` to declare to it.
+  ArtcraftApi { origin: &'static str },
+  /// Our other hosts: CDNs, uploads, websites.
+  ArtcraftHost,
+  /// A known third-party provider.
+  ThirdParty(&'static ThirdPartyProvider),
+  /// Anything else.
+  Unknown,
+}
+
+impl Destination {
+  pub fn classify(destination: &Url) -> Self {
+    if is_local_development_api(destination) {
+      return Self::ArtcraftApi { origin: ARTCRAFT_DESKTOP_DEVELOPMENT_ORIGIN };
+    }
+    let Some(host) = destination.host_str() else {
+      return Self::Unknown;
+    };
+    if destination.scheme() == "https" && ARTCRAFT_API_HOSTNAMES.contains(&host) {
+      return Self::ArtcraftApi { origin: ARTCRAFT_DESKTOP_ORIGIN };
+    }
+    if ARTCRAFT_DOMAINS.iter().any(|domain| is_domain_or_subdomain(host, domain)) {
+      return Self::ArtcraftHost;
+    }
+    THIRD_PARTY_PROVIDERS
+      .iter()
+      .find(|provider| provider.domains.iter().any(|domain| is_domain_or_subdomain(host, domain)))
+      .map_or(Self::Unknown, Self::ThirdParty)
+  }
+}
+
+fn is_local_development_api(destination: &Url) -> bool {
+  if !matches!(destination.scheme(), "http" | "https") {
+    return false;
+  }
+  match destination.host() {
+    Some(Host::Domain("localhost")) => true,
+    Some(Host::Ipv4(address)) => address.is_loopback(),
+    Some(Host::Ipv6(address)) => address.is_loopback(),
+    _ => false,
+  }
+}
+
+fn is_domain_or_subdomain(host: &str, domain: &str) -> bool {
+  host == domain
+    || host
+      .strip_suffix(domain)
+      .is_some_and(|prefix| prefix.ends_with('.'))
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  mod artcraft {
+    use super::*;
+
+    #[test]
+    fn deployed_apis_get_desktop_origin() {
+      for destination in [
+        "https://api.storyteller.ai/v1/session",
+        "https://api.getartcraft.com/v1/session",
+        "https://api.fakeyou.com/v1/session",
+      ] {
+        assert_eq!(classify(destination), Destination::ArtcraftApi { origin: "https://desktop.getartcraft.com" });
+      }
+    }
+
+    #[test]
+    fn local_apis_get_development_origin() {
+      for destination in [
+        "http://localhost:12345/v1/session",
+        "https://localhost:12345/v1/session",
+        "http://127.0.0.1:12345/v1/session",
+        "http://[::1]:12345/v1/session",
+      ] {
+        assert_eq!(classify(destination), Destination::ArtcraftApi { origin: "http://localhost" });
+      }
+    }
+
+    #[test]
+    fn other_owned_hosts_are_not_apis() {
+      for destination in [
+        "https://cdn-2.fakeyou.com/media/a/b.png",
+        "https://cdn.storyteller.ai/media/a/b.png",
+        "https://style.storyteller.ai/",
+        "https://app.getartcraft.com/",
+        "https://getartcraft.com/",
+        "http://api.storyteller.ai/v1/session",
+      ] {
+        assert_eq!(classify(destination), Destination::ArtcraftHost, "{destination}");
+      }
+    }
+  }
+
+  mod third_party {
+    use super::*;
+
+    #[test]
+    fn providers_get_their_own_origins() {
+      for (destination, name, origin) in [
+        ("https://grok.com/rest/app-chat/conversations/new", "Grok", "https://grok.com"),
+        ("https://assets.grok.com/users/a/b.mp4", "Grok", "https://grok.com"),
+        ("https://imagine-public.x.ai/a.png", "Grok", "https://grok.com"),
+        ("https://www.midjourney.com/api/submit-jobs", "Midjourney", "https://www.midjourney.com"),
+        ("https://cdn.midjourney.com/a/0_0.png", "Midjourney", "https://www.midjourney.com"),
+        ("https://sora.chatgpt.com/backend/nf/create", "Sora", "https://sora.chatgpt.com"),
+        ("https://videos.openai.com/a.mp4", "Sora", "https://sora.chatgpt.com"),
+        ("https://chatgpt.com/backend-api/sentinel", "ChatGPT", "https://chatgpt.com"),
+        ("https://api.worldlabs.ai/api/v1/worlds", "World Labs", "https://marble.worldlabs.ai"),
+        ("https://static.kinovi.ai/a.png", "Kinovi", "https://kinovi.ai"),
+        ("https://static.seedance2-pro.com/materials/a.png", "Seedance 2 Pro", "https://seedance2-pro.com"),
+        ("https://v3b.fal.media/files/a.png", "fal", "https://fal.ai"),
+        ("https://console.gmicloud.ai/api", "GMI Cloud", "https://console.gmicloud.ai"),
+      ] {
+        let Destination::ThirdParty(provider) = classify(destination) else {
+          panic!("{destination} is not a third party");
+        };
+        assert_eq!((provider.name, provider.origin), (name, origin));
+      }
+    }
+
+    #[test]
+    fn lookalikes_and_others_are_unknown() {
+      for destination in [
+        "https://api.storyteller.ai.example.com/v1/session",
+        "https://notstoryteller.ai/",
+        "https://evilgrok.com/",
+        "https://grok.com.example.com/",
+        "https://www.gravatar.com/avatar/a",
+        "https://storage.googleapis.com/bucket/a.png",
+        "http://192.168.1.2:12345/v1/session",
+        "tauri://localhost",
+      ] {
+        assert_eq!(classify(destination), Destination::Unknown, "{destination}");
+      }
+    }
+  }
+
+  fn classify(destination: &str) -> Destination {
+    Destination::classify(&Url::parse(destination).unwrap())
+  }
+}

crates/lib/artcraft_client_identity/src/lib.rs

@@ -0,0 +1,12 @@
+//! artcraft_client_identity
+//!
+//! How the ArtCraft desktop app identifies itself (`Origin`, `User-Agent`) to each destination.
+//!
+//! Our own APIs get the declared ArtCraft desktop identity. Known third-party providers get an
+//! identity close to their own website, and never ours. The native third-party Rust clients
+//! (Grok, Midjourney, Sora, etc.) set their own headers and do not use this crate.
+
+pub mod destination;
+pub mod origins;
+pub mod third_party_provider;
+pub mod user_agents;

crates/lib/artcraft_client_identity/src/origins.rs

@@ -0,0 +1,11 @@
+/// `Origin` sent to our deployed APIs.
+/// Keep in sync with `actix_cors_configs/src/configs/artcraft_desktop.rs` in artcraft-services.
+pub const ARTCRAFT_DESKTOP_ORIGIN: &str = "https://desktop.getartcraft.com";
+
+/// `Origin` sent to a locally running API (eg. `http://localhost:12345`).
+/// Development CORS accepts any `localhost` origin.
+pub const ARTCRAFT_DESKTOP_DEVELOPMENT_ORIGIN: &str = "http://localhost";
+
+/// `Origin` packaged builds historically sent everywhere. Now only sent to our non-API hosts
+/// (CDNs, websites), where it is left unchanged.
+pub const LEGACY_DESKTOP_ORIGIN: &str = "https://studio.storyteller.ai";

crates/lib/artcraft_client_identity/src/third_party_provider.rs

@@ -0,0 +1,30 @@
+/// A third-party provider, and the `Origin` of its own website that we present to its hosts.
+#[derive(Debug, PartialEq, Eq)]
+pub struct ThirdPartyProvider {
+  pub name: &'static str,
+  /// Registrable domains; subdomains match too.
+  pub domains: &'static [&'static str],
+  pub origin: &'static str,
+}
+
+/// Every third party that gets an invented origin. Origins match what each provider's native
+/// Rust client already sends. First match wins, so more specific entries go first.
+pub const THIRD_PARTY_PROVIDERS: [ThirdPartyProvider; 9] = [
+  ThirdPartyProvider { name: "Grok", domains: &["grok.com", "x.ai"], origin: "https://grok.com" },
+  ThirdPartyProvider { name: "Midjourney", domains: &["midjourney.com"], origin: "https://www.midjourney.com" },
+  ThirdPartyProvider {
+    name: "Sora",
+    domains: &["sora.chatgpt.com", "sora.com", "openai.com", "oaistatic.com"],
+    origin: "https://sora.chatgpt.com",
+  },
+  ThirdPartyProvider { name: "ChatGPT", domains: &["chatgpt.com"], origin: "https://chatgpt.com" },
+  ThirdPartyProvider {
+    name: "World Labs",
+    domains: &["worldlabs.ai", "wlt-ai.art"],
+    origin: "https://marble.worldlabs.ai",
+  },
+  ThirdPartyProvider { name: "Kinovi", domains: &["kinovi.ai"], origin: "https://kinovi.ai" },
+  ThirdPartyProvider { name: "Seedance 2 Pro", domains: &["seedance2-pro.com"], origin: "https://seedance2-pro.com" },
+  ThirdPartyProvider { name: "fal", domains: &["fal.ai", "fal.run", "fal.media"], origin: "https://fal.ai" },
+  ThirdPartyProvider { name: "GMI Cloud", domains: &["gmicloud.ai"], origin: "https://console.gmicloud.ai" },
+];

crates/lib/artcraft_client_identity/src/user_agents.rs

@@ -0,0 +1,23 @@
+/// `User-Agent` sent to our own APIs and hosts.
+///
+/// TODO: Change to "artcraft-desktop/1.0" once the backend services can parse it.
+pub const ARTCRAFT_DESKTOP_USER_AGENT: &str = "storyteller-client/1.0";
+
+/// `User-Agent` sent to third parties: the default of the OS webview Tauri runs on
+/// (WKWebView on macOS, WebView2 on Windows, WebKitGTK on Linux).
+///
+/// NB: These are hardcoded snapshots and WILL go out of date as the OS webviews update
+/// (especially WebView2's Chrome/Edge version, which auto-updates on Windows). Rust can't read
+/// the webview's real `navigator.userAgent`, so refresh these periodically by checking
+/// `navigator.userAgent` in the desktop app's devtools on each OS.
+#[cfg(target_os = "macos")]
+pub const WEBVIEW_USER_AGENT: &str =
+  "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)";
+
+#[cfg(target_os = "windows")]
+pub const WEBVIEW_USER_AGENT: &str =
+  "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36 Edg/140.0.0.0";
+
+#[cfg(not(any(target_os = "macos", target_os = "windows")))]
+pub const WEBVIEW_USER_AGENT: &str =
+  "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/605.1.15 (KHTML, like Gecko)";

crates/vendor/tauri-plugin-http/Cargo.toml

@@ -36,6 +36,7 @@ urlpattern = "0.3"
 regex = "1"
 
 [dependencies]
+artcraft_client_identity = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
 tauri = { workspace = true }

crates/vendor/tauri-plugin-http/src/artcraft_identity.rs

@@ -0,0 +1,207 @@
+use artcraft_client_identity::destination::Destination;
+use artcraft_client_identity::origins::LEGACY_DESKTOP_ORIGIN;
+use artcraft_client_identity::user_agents::{ARTCRAFT_DESKTOP_USER_AGENT, WEBVIEW_USER_AGENT};
+use http::{header, HeaderMap, HeaderValue};
+use url::{Host, Url};
+
+/// The `User-Agent` to send when the frontend didn't set one.
+pub(crate) fn artcraft_default_user_agent(destination: &Url) -> &'static str {
+  match Destination::classify(destination) {
+    Destination::ArtcraftApi { .. } | Destination::ArtcraftHost => ARTCRAFT_DESKTOP_USER_AGENT,
+    Destination::ThirdParty(_) | Destination::Unknown => WEBVIEW_USER_AGENT,
+  }
+}
+
+/// Replace the webview's own `Origin` (packaged `tauri://localhost` etc., or a Vite loopback
+/// origin at any port) with the identity chosen for the destination. The native HTTP bridge
+/// shares the desktop cookie jar, so its identity must not depend on the webview.
+pub(crate) fn normalize_artcraft_origin(destination: &Url, headers: &mut HeaderMap) {
+  let origin = headers.get(header::ORIGIN).and_then(|value| value.to_str().ok());
+  // Packaged-app webview origins on macOS and Windows.
+  let packaged_origin = headers.get(header::ORIGIN).is_none()
+    || matches!(origin, Some("null" | "http://tauri.localhost" | "tauri://localhost"));
+  // Development webview origins (Vite on any loopback port).
+  let webview_origin = packaged_origin || origin.is_some_and(is_loopback_origin);
+
+  let replacement = match Destination::classify(destination) {
+    // Our APIs (deployed or local) see the declared desktop identity.
+    Destination::ArtcraftApi { origin } if webview_origin => origin,
+    // Known third parties see an origin close to their own website.
+    Destination::ThirdParty(provider) if webview_origin => provider.origin,
+    // Our CDNs and websites keep the historical packaged-app handling.
+    Destination::ArtcraftHost if packaged_origin => LEGACY_DESKTOP_ORIGIN,
+    // Unknown hosts and ordinary website origins are left untouched.
+    _ => return,
+  };
+
+  // HeaderMap is a multimap; insert replaces all existing Origin values.
+  headers.insert(header::ORIGIN, HeaderValue::from_static(replacement));
+}
+
+fn is_loopback_origin(origin: &str) -> bool {
+  let Ok(url) = Url::parse(origin) else {
+    return false;
+  };
+  if !matches!(url.scheme(), "http" | "https") {
+    return false;
+  }
+  match url.host() {
+    Some(Host::Domain("localhost")) => true,
+    Some(Host::Ipv4(address)) => address.is_loopback(),
+    Some(Host::Ipv6(address)) => address.is_loopback(),
+    _ => false,
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  const API: &str = "https://api.storyteller.ai/v1/session";
+  const LOCAL_API: &str = "http://localhost:12345/v1/session";
+  const CDN: &str = "https://cdn-2.fakeyou.com/media/a/b.png";
+  const GCS: &str = "https://storage.googleapis.com/bucket/a.png";
+  const GROK: &str = "https://grok.com/rest/app-chat/conversations/new";
+  const MIDJOURNEY: &str = "https://www.midjourney.com/api/submit-jobs";
+  const UNKNOWN: &str = "https://www.gravatar.com/avatar/a";
+
+  const DEV_WEBVIEW_ORIGIN: &str = "http://127.0.0.1:5193";
+  const PACKAGED_ORIGINS: [Option<&str>; 4] =
+    [None, Some("null"), Some("http://tauri.localhost"), Some("tauri://localhost")];
+
+  mod development {
+    use super::*;
+
+    #[test]
+    fn normalizes_dynamic_ports_and_loopback_hosts() {
+      for origin in [
+        "http://127.0.0.1:5193",
+        "http://127.0.0.1:5194",
+        "http://127.0.0.1:65535",
+        "http://localhost:5173",
+        "http://[::1]:5193",
+      ] {
+        assert_eq!(normalized(API, Some(origin)), "https://desktop.getartcraft.com");
+        assert_eq!(normalized(LOCAL_API, Some(origin)), "http://localhost");
+        assert_eq!(normalized(GROK, Some(origin)), "https://grok.com");
+      }
+      assert_eq!(
+        normalized("https://api.fakeyou.com/v1/session", Some(DEV_WEBVIEW_ORIGIN)),
+        "https://desktop.getartcraft.com"
+      );
+    }
+
+    #[test]
+    fn leaves_cdns_and_unknown_destinations_unchanged() {
+      for destination in [
+        CDN,
+        GCS,
+        UNKNOWN,
+        "https://api.storyteller.ai.example.com/v1/session",
+        "http://api.storyteller.ai/v1/session",
+      ] {
+        assert_eq!(normalized(destination, Some(DEV_WEBVIEW_ORIGIN)), DEV_WEBVIEW_ORIGIN, "{destination}");
+      }
+    }
+
+    #[test]
+    fn leaves_non_webview_origins_unchanged() {
+      for origin in [
+        "https://app.getartcraft.com",
+        "https://example.com",
+        "http://localhost.example.com:5193",
+        "http://192.168.1.2:5193",
+        "not a URL",
+        "",
+      ] {
+        assert_eq!(normalized(API, Some(origin)), origin);
+        assert_eq!(normalized(GROK, Some(origin)), origin);
+      }
+    }
+  }
+
+  mod packaged {
+    use super::*;
+
+    #[test]
+    fn our_apis_get_desktop_identity() {
+      for origin in PACKAGED_ORIGINS {
+        assert_eq!(normalized(API, origin), "https://desktop.getartcraft.com");
+        assert_eq!(normalized(LOCAL_API, origin), "http://localhost");
+      }
+    }
+
+    #[test]
+    fn third_parties_get_their_own_origin() {
+      for origin in PACKAGED_ORIGINS {
+        assert_eq!(normalized(GROK, origin), "https://grok.com");
+        assert_eq!(normalized(MIDJOURNEY, origin), "https://www.midjourney.com");
+      }
+    }
+
+    #[test]
+    fn cdns_keep_legacy_origin() {
+      for origin in PACKAGED_ORIGINS {
+        assert_eq!(normalized(CDN, origin), "https://studio.storyteller.ai");
+      }
+    }
+
+    #[test]
+    fn unknown_destinations_never_get_our_origin() {
+      for destination in [UNKNOWN, GCS] {
+        assert_eq!(normalized(destination, Some("tauri://localhost")), "tauri://localhost");
+        assert_eq!(normalized(destination, Some("null")), "null");
+        assert_eq!(normalized_or_missing(destination, None), None);
+      }
+    }
+
+    #[test]
+    fn replaces_duplicate_origin_values_without_changing_session_headers() {
+      let mut headers = HeaderMap::new();
+      headers.append(header::ORIGIN, HeaderValue::from_static(DEV_WEBVIEW_ORIGIN));
+      headers.append(header::ORIGIN, HeaderValue::from_static(DEV_WEBVIEW_ORIGIN));
+      headers.insert(header::COOKIE, HeaderValue::from_static("session=fixture"));
+      normalize_artcraft_origin(&Url::parse(API).unwrap(), &mut headers);
+      assert_eq!(headers.get_all(header::ORIGIN).iter().count(), 1);
+      assert_eq!(headers[header::ORIGIN], "https://desktop.getartcraft.com");
+      assert_eq!(headers[header::COOKIE], "session=fixture");
+    }
+  }
+
+  mod user_agent {
+    use super::*;
+
+    #[test]
+    fn ours_get_artcraft_user_agent() {
+      for destination in [API, LOCAL_API, CDN] {
+        assert_eq!(user_agent(destination), "storyteller-client/1.0");
+      }
+    }
+
+    #[test]
+    fn third_parties_get_webview_user_agent() {
+      for destination in [GROK, MIDJOURNEY, GCS, UNKNOWN] {
+        let user_agent = user_agent(destination);
+        assert!(user_agent.starts_with("Mozilla/5.0 ("), "{user_agent}");
+        assert!(!user_agent.contains("storyteller"), "{user_agent}");
+      }
+    }
+
+    fn user_agent(destination: &str) -> &'static str {
+      artcraft_default_user_agent(&Url::parse(destination).unwrap())
+    }
+  }
+
+  fn normalized(destination: &str, origin: Option<&str>) -> String {
+    normalized_or_missing(destination, origin).unwrap()
+  }
+
+  fn normalized_or_missing(destination: &str, origin: Option<&str>) -> Option<String> {
+    let mut headers = HeaderMap::new();
+    if let Some(origin) = origin {
+      headers.insert(header::ORIGIN, HeaderValue::from_str(origin).unwrap());
+    }
+    normalize_artcraft_origin(&Url::parse(destination).unwrap(), &mut headers);
+    headers.get(header::ORIGIN).map(|value| value.to_str().unwrap().to_owned())
+  }
+}

crates/vendor/tauri-plugin-http/src/commands.rs

@@ -16,12 +16,11 @@ use tauri::{
 use tokio::sync::oneshot::{channel, Receiver, Sender};
 
 use crate::{
+    artcraft_identity::{artcraft_default_user_agent, normalize_artcraft_origin},
     scope::{Entry, Scope},
     Error, Http, Result,
 };
 
-const HTTP_USER_AGENT: &str = concat!(env!("CARGO_PKG_NAME"), "/", env!("CARGO_PKG_VERSION"),);
-
 struct ReqwestResponse(reqwest::Response);
 impl tauri::Resource for ReqwestResponse {}
 
@@ -269,7 +268,7 @@ pub async fn fetch<R: Runtime>(
                     builder = builder.cookie_provider(state.cookies_jar.clone());
                 }
 
-                let mut request = builder.build()?.request(method.clone(), url);
+                let mut request = builder.build()?.request(method.clone(), url.clone());
 
                 // POST and PUT requests should always have a 0 length content-length,
                 // if there is no body. https://fetch.spec.whatwg.org/#http-network-or-cache-fetch
@@ -284,7 +283,7 @@ pub async fn fetch<R: Runtime>(
                 }
 
                 if !headers.contains_key(header::USER_AGENT) {
-                    headers.append(header::USER_AGENT, HeaderValue::from_str(HTTP_USER_AGENT)?);
+                    headers.append(header::USER_AGENT, HeaderValue::from_static(artcraft_default_user_agent(&url)));
                 }
 
                 // ensure we have an Origin header set
@@ -305,26 +304,7 @@ pub async fn fetch<R: Runtime>(
                     headers.remove(header::ORIGIN);
                 };
 
-                // NB(bt): In production builds, the origin seems to be "null". This is what our server CORS filter sees:
-                //   [2025-05-01T23:42:35Z WARN  actix_cors_configs::configs::fakeyou] Invalid origin: "null"
-                //   [2025-05-01T23:42:35Z WARN  actix_cors_configs::util::netlify_branch_domain_matches] Invalid origin: "null"
-                //   [2025-05-01T23:42:35Z WARN  actix_cors_configs::util::netlify_branch_domain_matches] Invalid origin: "null"
-                //     ...
-                //   [2025-05-01T23:42:35Z WARN  actix_cors_configs::util::netlify_branch_domain_matches] Invalid origin: "null"
-                //   [2025-05-01T23:42:35Z INFO  actix_web::middleware::logger] [storyteller-web-85f9b4974-ddvq7] IP=[redact] 
-                //               939322e1095ee5e4-IAD "POST /v1/login HTTP/1.1" 400 42 "-" "tauri-plugin-http/2.4.3" 0.000076
-                let mut maybe_origin_header = headers.get(header::ORIGIN);
-
-                let replace_origin_header = maybe_origin_header.is_none()
-                    || maybe_origin_header == Some(&HeaderValue::from_static("null")) // Above error (Mac)
-                    || maybe_origin_header == Some(&HeaderValue::from_static("http://tauri.localhost")) // Windows
-                    || maybe_origin_header == Some(&HeaderValue::from_static("tauri://localhost")); // Mac plausibly causes this
-
-                if replace_origin_header {
-                    // TODO(bt): Make this a sentinel origin, eg. sentinel.storyteller.ai.
-                    // NB: HeadersMap is a multimap, but this should ensure we just have one value.
-                    headers.insert(header::ORIGIN, HeaderValue::from_static("https://studio.storyteller.ai"));
-                }
+                normalize_artcraft_origin(&url, &mut headers);
 
                 if let Some(data) = data {
                     request = request.body(data);

crates/vendor/tauri-plugin-http/src/lib.rs

@@ -12,6 +12,8 @@ use tauri::{
 
 pub use error::{Error, Result};
 
+mod artcraft_identity;
+
 // NB(bt): We're making everything public so we can access it.
 pub mod commands;
 pub mod error;

docs/desktop-session-regression.md

@@ -0,0 +1,189 @@
+# Desktop session regression — September 27, 2026
+
+The combined development launcher (`92e6f438c3`, following the performance
+change `df707bf8e1`) moved Vite from `localhost:5173` to an available port on
+`127.0.0.1`. The vendored HTTP plugin forwarded that webview Origin to the
+production API. The API rejected it with **400: Origin is not allowed to make
+this request**.
+
+The native login bridge and credits commands use a different HTTP transport and
+continued working. Consequently the login modal correctly recognized the native
+session, but Accounts, Library, and page media requests failed. Accounts treated
+the error as logged out; its Log In button rechecked the valid native session
+and immediately closed the login modal again.
+
+The fix extends the existing packaged-desktop Origin normalization to loopback
+development origins, at any port, for HTTPS requests to `api.storyteller.ai` and
+`api.fakeyou.com`. Other development request destinations and non-loopback
+website origins retain their headers. Cookie handling and API authorization are
+unchanged. A frontend reload alone cannot update this fix: Rust must rebuild.
+
+## Dedicated desktop origin and rollout
+
+The desktop app now declares itself per destination. Both transports read the
+values from one place, `crates/lib/artcraft_client_identity`
+(`Destination::classify`, origins, user agents, third-party provider table):
+
+| Destination                                            | Origin sent                         | User-Agent               |
+|--------------------------------------------------------|-------------------------------------|--------------------------|
+| Our APIs (`api.storyteller.ai`, `api.fakeyou.com`, …)  | `https://desktop.getartcraft.com`   | `storyteller-client/1.0` |
+| Local API (`localhost`, `127.0.0.1`, `[::1]`)          | `http://localhost`                  | `storyteller-client/1.0` |
+| Our CDNs / sites (`*.storyteller.ai`, `*.fakeyou.com`) | unchanged (`studio.storyteller.ai`) | `storyteller-client/1.0` |
+| Named third parties (`THIRD_PARTY_PROVIDERS`)          | the provider's own site             | OS webview               |
+| Any other host (incl. `storage.googleapis.com`)        | webview origin, untouched           | OS webview               |
+
+- The native Rust client (`artcraft_client`) sends the Origin and User-Agent on
+  every API request via `storyteller_client_builder`; it previously sent no
+  Origin.
+- The "OS webview" User-Agents are hardcoded snapshots in
+  `artcraft_client_identity/src/user_agents.rs` and go out of date as the
+  webviews update (notably WebView2's Edge version on Windows). Refresh them
+  from `navigator.userAgent` in the desktop app's devtools on each OS.
+- The vendored HTTP plugin only replaces the webview's own origin (packaged
+  `tauri://localhost` etc., or a loopback Vite origin), and only sets the
+  User-Agent when the frontend didn't.
+- Native third-party Rust clients (Grok, Midjourney, Sora, World Labs, Kinovi)
+  set their own headers and are not affected.
+- Older desktop releases keep working: the server still allows the studio and
+  Tauri origins, and requests without an Origin.
+
+Keep the deployed origin in sync with
+`../artcraft-services/crates/lib/actix_cors_configs/src/configs/artcraft_desktop.rs`.
+Development servers accept any `localhost` origin.
+
+Deploy the server allowlist to the APIs **before running or releasing a desktop
+build with the new origin**. Otherwise the deployed server will reject desktop
+requests until its allowlist is updated. The server retains the studio and
+legacy Tauri origins so existing desktop releases continue working.
+
+Check both repositories:
+
+```sh
+# From artcraft/
+cargo test --offline -p artcraft_client_identity -p tauri-plugin-http --lib
+
+# From artcraft-services/
+cargo test --offline -p actix_cors_configs --lib
+```
+
+The server tests verify credentialed GET/POST requests and OPTIONS preflights in
+production and development, rejection of lookalike domains/HTTP/alternate ports,
+and compatibility with previous desktop origins. After server deployment, repeat
+the native checks below using the updated app.
+
+## Observed native results
+
+These observations were captured with the earlier studio origin, before the
+dedicated desktop origin migration. They do not establish that production has
+deployed the new allowlist.
+
+Checked in the real macOS Tauri dev app at `http://127.0.0.1:5193`, using its
+existing session. Temporary probes were removed after verification. No cookies,
+tokens, passwords, account identifiers, or media contents are recorded here.
+
+| Check                          | Before                                | After                      |
+|--------------------------------|---------------------------------------|----------------------------|
+| Frontend HTTP `/v1/session`    | 400, Origin rejected                  | 200                        |
+| Shared `UsersApi.GetSession()` | `success: false`                      | Success, logged in         |
+| Native vs. frontend identity   | Frontend could not resolve an account | Same account               |
+| Shared media API, page size 1  | Not measured separately               | Success, one item returned |
+
+## Automated checks
+
+From the repository root:
+
+```sh
+cargo test --offline -p tauri-plugin-http artcraft_origin --lib
+./script/artcraft/unix_dev.sh
+```
+
+In a second terminal, substitute the URL printed by the launcher:
+
+```sh
+cd frontend
+npm run test:desktop-session -- http://127.0.0.1:5193
+```
+
+The Rust tests cover the default port, alternate/collision ports, IPv4, IPv6,
+localhost, packaged origins, duplicate headers, session-header preservation,
+and destinations/origins that must remain unchanged.
+
+The browser check uses the real frontend with an isolated Chrome profile and
+mocked IPC. It verifies matching credits and Accounts state, a visible Library
+image, media after opening the deferred image page, video/audio page rendering,
+and logout followed by sign-in. It blocks remote browser traffic and never uses
+your real account or native credentials. It requires installed Google Chrome.
+It can also run against a locally served production frontend build.
+
+These browser mocks cannot validate native transport or server CORS. The
+performance fixture deliberately rejects HTTP requests and is **not** an
+authentication acceptance test. Run the native check below when changing the
+launcher, HTTP bridge, or authentication plumbing.
+
+Validation on September 27: all 12 HTTP-plugin tests, 20 login-modal tests, and
+10 app tests passed. The browser check passed against both the Vite dev server
+and a fresh production build. To repeat the production check, serve a build in
+one terminal, then pass its printed URL to `test:desktop-session` in another:
+
+```sh
+cd frontend/apps/artcraft
+npm run build -- --outDir /tmp/artcraft-session-build
+npm run preview -- --outDir /tmp/artcraft-session-build --host 127.0.0.1 --port 6215
+```
+
+## Repeat the real native check
+
+1. Start the combined launcher, with an existing signed-in test session. Verify
+   Accounts displays that account, My Library loads its media, and Create Image,
+   Create Video, and Create Audio load their content.
+2. Right-click inside the desktop webview, choose **Inspect Element**, and open
+   **Console**. Run this read-only probe. It prints statuses/counts, not credentials
+   or account/media contents:
+
+```js
+void (async () => {
+  const invoke = window.__TAURI_INTERNALS__.invoke;
+  const host = (await invoke("get_app_info_command")).payload.storyteller_host;
+  const options = { method: "GET", credentials: "include" };
+  const started = performance.now();
+  const [native, response] = await Promise.all([
+    invoke("storyteller_get_login_session_command"),
+    window.FetchProxy(`${host}/v1/session`, { ...options }),
+  ]);
+  if (!response.ok) {
+    console.log({ origin: location.origin, sessionStatus: response.status });
+    return;
+  }
+  const session = await response.json();
+  const result = {
+    origin: location.origin,
+    sessionStatus: response.status,
+    nativeLoggedIn: !!native,
+    frontendLoggedIn: session.logged_in,
+    sameAccount: native?.user_token === session.user?.user_token,
+    sessionElapsedMs: performance.now() - started,
+  };
+  if (session.logged_in && session.user) {
+    const username = encodeURIComponent(session.user.username);
+    const media = await window.FetchProxy(
+      `${host}/v1/media_files/list/user/${username}?page_size=1`, { ...options },
+    );
+    result.mediaStatus = media.status;
+    if (media.ok) result.mediaCount = (await media.json()).results?.length;
+  }
+  console.log(result);
+})().catch((error) => console.error("Desktop session probe failed", String(error)));
+```
+
+3. Repeat with a changed port (`ARTCRAFT_DEV_PORT=6200`) and with the starting
+   port occupied. For example, keep this listener running in another terminal
+   before starting the launcher; stop it with Ctrl-C afterward:
+
+```sh
+node -e 'require("node:net").createServer().listen(5193, "127.0.0.1")'
+```
+
+The launcher should select a later port, and both session transports should
+still agree. An empty account may legitimately return zero media; it should
+still return HTTP 200. Verify a genuinely signed-out session shows the login
+screen using the isolated browser check, or a disposable account/profile.

docs/performance.md

@@ -0,0 +1,224 @@
+# Desktop frontend performance experiments
+
+Measured September 26, 2026 on an Apple M4 Pro, macOS arm64, Chrome
+153.0.8010.53, Node 24.13.0. These are production frontend measurements in
+headless Chrome with mocked Tauri services. They do **not** measure native
+process launch, WKWebView/WebView2, Rust, disk startup, real account loading,
+or generation latency.
+
+These timings are not authentication acceptance tests: the benchmark mocks the
+native session and rejects frontend HTTP requests. Before accepting a desktop
+change, also run the [session and Library checks](desktop-session-regression.md),
+including real Tauri HTTP requests when changing the launcher or bridge.
+
+## Changes and results
+
+Seven samples per version; table values are medians. Each sample uses a fresh
+browser context at 1440 × 1000 with device scale 1 and browser HTTP cache
+disabled. The browser process stays alive between samples. A reload in the
+same context is measured separately. There is no CPU/network throttling.
+External requests, including analytics, fonts, and media, are blocked in both
+versions. The login fixture is signed in; the bundled model overlay is used.
+
+| Measurement                 | Before    | After     | Reduction |
+|-----------------------------|-----------|-----------|-----------|
+| Startup to frame            | 566.40 ms | 350.60 ms | 38.1%     |
+| Refresh to frame            | 248.60 ms | 198.10 ms | 20.3%     |
+| Startup JavaScript          | 9.05 MB   | 6.47 MB   | 28.6%     |
+| Startup long tasks (sum)    | 336.00 ms | 184.00 ms | 45.2%     |
+| First drawing page to frame | 120.90 ms | 118.20 ms | 2.2%      |
+| Drawing to home: dispatch   | 23.40 ms  | 9.00 ms   | 61.5%     |
+| Drawing to home: frame      | 29.50 ms  | 23.00 ms  | 22.0%     |
+| Home to drawing: dispatch   | 42.10 ms  | 18.80 ms  | 55.3%     |
+| Home to drawing: frame      | 105.70 ms | 86.50 ms  | 18.2%     |
+
+The 2.2% first-open difference is small enough to treat as unchanged. These
+local measurements are evidence of reduced frontend work, not predictions
+of identical percentage gains on every user's machine. Raw samples, ranges,
+environment, fixture sizes, browser errors, and build provenance are in
+[before.json](performance/2026-09-26-before.json) and
+[after.json](performance/2026-09-26-after.json).
+
+Three changes produced these results:
+
+1. `MainApp.tsx` imported every editor at launch. Fifteen pages now use
+   `React.lazy` behind a Suspense boundary below the persistent shell. Their
+   code loads when selected; the top bar stays available during loading.
+   The default Apps page remains eager. Drawing also remains eager: its
+   shared code is already part of the shell, and experimentally deferring
+   its small host adapter made first-open latency worse for little saving.
+   First-open latency for the other deferred editors is a remaining tradeoff
+   to measure, especially on slower disks/CPUs. All 15 deferred modules were
+   imported successfully in the browser, but this is not an end-to-end test
+   of every editor's features.
+2. `TabState.ts` exported the drawing scene to JSON when leaving and imported
+   it when returning. The Zustand scene store already survives page unmount.
+   With four imported images, the old path performed four FileReader reads
+   on exit and four more on return, allocated base64 copies, rebuilt image
+   nodes, cleared the selection, and appended an undo-history entry. Tab
+   changes now keep the live store. The measured round trip performs **zero
+   image-file reads**, preserves the selected node, and keeps history length
+   at one instead of growing to two. Explicit file export/import remains
+   available. Tests cover image identity, model metadata, selection, redo,
+   gallery reset, rapid navigation, and portable file export.
+3. The shell ran `getGPUTier()` at startup and stored its result in an unread
+   React state value. Removing it eliminates **one startup WebGL context
+   request** and its associated detection work. The real 3D renderer still
+   creates its context when used. This experiment reports combined timing
+   gains, not an isolated timing attribution for each individual change.
+
+## Repeat the experiment
+
+From the repository root:
+
+```sh
+cd frontend
+npm ci
+npm run perf:desktop -- --output /tmp/artcraft-perf-current --smoke-imports
+```
+
+The default browser is an installed Google Chrome (`--channel chrome`). The
+runner requires permission to launch a browser and bind a loopback server.
+It never uses your regular browser profile, account, or native app data.
+`@playwright/test` is pinned as a development dependency. Artifacts are written
+outside the repository by default. Use a dedicated output directory: its
+`dist` subdirectory is rebuilt by Vite.
+
+For this particular two-module change, reproduce the original implementation
+without replacing local source files:
+
+```sh
+npm run perf:desktop -- --output /tmp/artcraft-perf-before \
+  --baseline-ref 780e4494e995163fed1d677b88c3cf03b3fca63c
+npm run perf:desktop -- --output /tmp/artcraft-perf-after --smoke-imports
+node tools/performance/compare.mjs \
+  /tmp/artcraft-perf-before/results.json \
+  /tmp/artcraft-perf-after/results.json
+```
+
+`--baseline-ref` overlays **only** `MainApp.tsx` and `pages/Stores/TabState.ts`
+from that Git revision in the benchmark build. All other source files and
+dependencies remain current. It reproduces the two production files changed
+in this experiment; it is not a general historical-checkout benchmark. For
+future changes, capture a normal baseline **before** editing, use a new output
+directory for the changed version, and keep the runner, fixture, dependencies,
+browser, and machine identical. Run sequentially while the machine is idle;
+do not build or run other CPU-heavy tasks during samples. Repeat in reverse
+order if results are close or noisy.
+
+Useful options:
+
+```sh
+# Build in a restricted shell, then run where browser/server use is allowed.
+npm run perf:desktop -- --output /tmp/artcraft-perf-current --build-only
+npm run perf:desktop -- --output /tmp/artcraft-perf-current --skip-build
+
+# More samples; seven is the default.
+npm run perf:desktop -- --output /tmp/artcraft-perf-current --runs 15
+
+# Correctness checks for the navigation change.
+npx vitest run --config apps/artcraft/vitest.config.ts
+```
+
+Do not use `--skip-build` after changing app code; it intentionally measures
+the existing artifact. `build-info.json` records the revision, changed-file
+names, baseline overlay, and build time. The benchmark plugin alone exposes
+the stores needed to seed the scene. It is not part of the normal Vite/Tauri
+build, and no mock IPC or benchmark global is added to the shipped app.
+
+The runner builds from the app's working directory, matching its normal
+build command. This matters because Tailwind resolves its config and content
+relative to that directory. It rejects a run without working Tailwind styles
+or with uncaught browser errors. `drawing.png` provides a visual check after
+the measured operations. The initial unstyled exploratory runs were discarded.
+
+## What the measurements mean
+
+The fixture creates four deterministic 1024 × 1024 PNG image nodes and 80
+strokes of 200 coordinates each, with one selected image. On the recorded
+browser each PNG is 2,356,706 bytes. Fixture construction, image decoding,
+and a one-second settling period are outside the tab-transition timings.
+Each sample follows the same sequence:
+
+1. Navigate to the production app, wait for the Apps heading and for the
+   signed-in login overlay to disappear, then wait two animation frames.
+2. Reload that page and repeat the same readiness checks.
+3. Seed the scene while on Apps, open drawing, and wait for its canvas and
+   two animation frames. Allow a second for its background bake to settle.
+4. Switch to Apps and then back to drawing, measuring each separately.
+5. After a settling period, inspect node count, selection, history, and IPC
+   counters. Save a screenshot on the first run. Optionally evaluate all
+   deferred page modules after the final timed operation.
+
+`readyMs` is `performance.now()` after readiness checks and two animation
+frames; its origin is navigation start. It includes browser loading and
+automation readiness-observation overhead. `jsBytes` sums decoded resource
+sizes of loaded JavaScript; it is uncompressed bytes, not all packaged files.
+`longTaskMs` sums observed startup tasks longer than 50 ms, not total CPU time
+or total blocking time. Long Tasks support is browser-dependent.
+
+`stateReadyMs` measures the awaited `setActiveTab()` action, including React
+work synchronously flushed by its store subscribers. `paintMs` continues
+until the destination heading/canvas exists and two animation frames have
+passed. This is a **rendering-opportunity proxy**, not proof of GPU presentation
+or of every asynchronous image decode completing. In particular, the old
+return path could still be decoding images after the canvas first appeared.
+Tab measurements also create `artcraft:tab:APPS` and `artcraft:tab:2D` User
+Timing entries in the benchmark page.
+
+The runner calls the same store action used by navigation UI. It excludes
+pointer-event dispatch, menu animations, and physical click-to-screen latency.
+It does not automate paid generations, sign in to a real account, or measure
+remote services. Save the raw JSON as well as the summary; a single minimum
+time is not a reliable comparison.
+
+`dist/performance-bundle.json` ranks the largest retained modules per chunk
+and records chunk imports. Module `renderedBytes` is Rollup's intermediate
+module size; it is useful for attribution but should not be summed as final
+minified/gzipped size. Use actual resource bytes for the startup total.
+
+## Remaining investigation
+
+- The shell still loads about 6.47 MB of JavaScript. Shared imports through
+  drawing, scene, gallery, and settings entry points need a deeper dependency
+  audit. Separate lightweight store/type imports from editor code, then use
+  the bundle report and the same startup experiment to verify what actually
+  leaves the initial graph. The report identifies Spark, Three.js core and
+  renderer, the inline FBX-to-GLB conversion worker, PostHog, and Mediabunny
+  among the largest retained modules. Their presence is measured; the runtime
+  benefit of deferring each individually has not yet been measured.
+- Returning to the populated canvas still takes about 86 ms. The editor
+  remount, Konva drawing, image/transformer setup, and composite bake need a
+  timeline profile before choosing the next change. Keep scene restoration,
+  undo, selection, and background generation behavior in correctness checks.
+- `TaskQueue.tsx` polls every five seconds and rebuilds task arrays even when
+  the popover is closed. The benchmark uses an empty queue, so it does not
+  establish the cost for a large real queue. A fixed, representative task
+  fixture plus idle CPU/render counts is the next useful experiment there.
+- `useStageSnapshot` looks expensive in isolation, but its only call is
+  commented out in `PaintSurface.tsx`. It was excluded as a current bottleneck.
+
+Validation completed: normal production Vite build, all 10 app tests and 20
+login tests, all 15 deferred page-module imports, visual canvas inspection,
+and a check that the normal build contains no benchmark globals or fixtures.
+The broad TypeScript check remains blocked by existing workspace declaration/
+project-reference errors and Remix/Deno types. Comparing diagnostics with the
+two original modules showed the same diagnostic messages (some import traces
+and reporting locations changed); this is not a clean typecheck claim.
+
+## Validate in the native app
+
+Before claiming native launch or interaction gains, run matching release
+Tauri builds on the same machine and WebView version. Keep account, window
+size, network conditions, and canvas artwork fixed. Record the Web Inspector
+timeline for launch/reload, opening a tool for the first time, drawing → Apps,
+and Apps → drawing. Repeat at least seven times and retain the traces with
+build IDs and medians. Separate native process launch from page reload; do
+not mix dev/HMR traces with production measurements.
+
+For canvas tests, create a blank 1024-square canvas, import the same four
+images, add the same strokes, select an image, and wait for background work
+before switching. Check image content, selection, undo/redo, and opening a new
+gallery image afterward. Record actual click-to-visible-frame latency in
+the inspector as well as JavaScript tasks. The browser results above justify
+the code changes but do not replace that native validation.

docs/performance/2026-09-26-after.json

@@ -0,0 +1,527 @@
+{
+  "timestamp": "2026-09-27T00:32:54.524Z",
+  "build": {
+    "builtAt": "2026-09-27T00:30:35.760Z",
+    "revision": "780e4494e995163fed1d677b88c3cf03b3fca63c",
+    "baselineOverlay": null,
+    "changedFiles": [
+      "frontend/apps/artcraft/app/src/pages/MainApp.tsx",
+      "frontend/apps/artcraft/app/src/pages/Stores/TabState.ts",
+      "frontend/package-lock.json",
+      "frontend/package.json"
+    ]
+  },
+  "environment": {
+    "platform": "darwin",
+    "arch": "arm64",
+    "cpu": "Apple M4 Pro",
+    "browser": "153.0.8010.53",
+    "node": "v24.13.0",
+    "runs": 7,
+    "viewport": "1440x1000@1",
+    "ipc": "mocked",
+    "network": "local assets only, browser cache disabled"
+  },
+  "summary": {
+    "startup": {
+      "readyMs": {
+        "median": 350.60000002384186,
+        "min": 348.7000000476837,
+        "max": 457.39999997615814
+      },
+      "jsBytes": {
+        "median": 6466606,
+        "min": 6466606,
+        "max": 6466606
+      },
+      "longTaskMs": {
+        "median": 184,
+        "min": 179,
+        "max": 284
+      },
+      "webglContexts": {
+        "median": 0,
+        "min": 0,
+        "max": 0
+      }
+    },
+    "refresh": {
+      "readyMs": {
+        "median": 198.10000002384186,
+        "min": 197.10000002384186,
+        "max": 198.80000007152557
+      },
+      "jsBytes": {
+        "median": 6466606,
+        "min": 6466606,
+        "max": 6466606
+      },
+      "longTaskMs": {
+        "median": 0,
+        "min": 0,
+        "max": 0
+      },
+      "webglContexts": {
+        "median": 0,
+        "min": 0,
+        "max": 0
+      }
+    },
+    "firstDraw": {
+      "stateReadyMs": {
+        "median": 38.300000071525574,
+        "min": 37.60000002384186,
+        "max": 40.299999952316284
+      },
+      "paintMs": {
+        "median": 118.19999992847443,
+        "min": 115.30000007152557,
+        "max": 120
+      },
+      "fileReads": {
+        "median": 0,
+        "min": 0,
+        "max": 0
+      }
+    },
+    "leaveDraw": {
+      "stateReadyMs": {
+        "median": 9,
+        "min": 7.5,
+        "max": 11
+      },
+      "paintMs": {
+        "median": 23,
+        "min": 19.600000023841858,
+        "max": 26.600000023841858
+      },
+      "fileReads": {
+        "median": 0,
+        "min": 0,
+        "max": 0
+      }
+    },
+    "returnDraw": {
+      "stateReadyMs": {
+        "median": 18.800000071525574,
+        "min": 15.799999952316284,
+        "max": 20.700000047683716
+      },
+      "paintMs": {
+        "median": 86.5,
+        "min": 78.79999995231628,
+        "max": 90.10000002384186
+      },
+      "fileReads": {
+        "median": 0,
+        "min": 0,
+        "max": 0
+      }
+    }
+  },
+  "samples": [
+    {
+      "startup": {
+        "readyMs": 457.39999997615814,
+        "jsBytes": 6466606,
+        "longTaskMs": 284,
+        "webglContexts": 0
+      },
+      "refresh": {
+        "readyMs": 197.80000007152557,
+        "jsBytes": 6466606,
+        "longTaskMs": 0,
+        "webglContexts": 0
+      },
+      "firstDraw": {
+        "stateReadyMs": 38.800000071525574,
+        "paintMs": 119.5,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 7.600000023841858,
+        "paintMs": 20.399999976158142,
+        "fileReads": 0
+      },
+      "returnDraw": {
+        "stateReadyMs": 17.799999952316284,
+        "paintMs": 87.79999995231628,
+        "fileReads": 0
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 1,
+        "historyLength": 1,
+        "commands": {
+          "plugin:event|listen": 25,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 365.7999999523163,
+        "jsBytes": 6466606,
+        "longTaskMs": 185,
+        "webglContexts": 0
+      },
+      "refresh": {
+        "readyMs": 197.10000002384186,
+        "jsBytes": 6466606,
+        "longTaskMs": 0,
+        "webglContexts": 0
+      },
+      "firstDraw": {
+        "stateReadyMs": 37.60000002384186,
+        "paintMs": 116,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 7.5,
+        "paintMs": 26.600000023841858,
+        "fileReads": 0
+      },
+      "returnDraw": {
+        "stateReadyMs": 15.799999952316284,
+        "paintMs": 78.79999995231628,
+        "fileReads": 0
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 1,
+        "historyLength": 1,
+        "commands": {
+          "plugin:event|listen": 25,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 366.59999990463257,
+        "jsBytes": 6466606,
+        "longTaskMs": 193,
+        "webglContexts": 0
+      },
+      "refresh": {
+        "readyMs": 198.39999997615814,
+        "jsBytes": 6466606,
+        "longTaskMs": 0,
+        "webglContexts": 0
+      },
+      "firstDraw": {
+        "stateReadyMs": 40.299999952316284,
+        "paintMs": 118.19999992847443,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 9,
+        "paintMs": 23,
+        "fileReads": 0
+      },
+      "returnDraw": {
+        "stateReadyMs": 19.699999928474426,
+        "paintMs": 86.5,
+        "fileReads": 0
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 1,
+        "historyLength": 1,
+        "commands": {
+          "plugin:event|listen": 25,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 348.7000000476837,
+        "jsBytes": 6466606,
+        "longTaskMs": 184,
+        "webglContexts": 0
+      },
+      "refresh": {
+        "readyMs": 197.89999997615814,
+        "jsBytes": 6466606,
+        "longTaskMs": 0,
+        "webglContexts": 0
+      },
+      "firstDraw": {
+        "stateReadyMs": 37.700000047683716,
+        "paintMs": 115.60000002384186,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 9.300000071525574,
+        "paintMs": 26.40000009536743,
+        "fileReads": 0
+      },
+      "returnDraw": {
+        "stateReadyMs": 18.700000047683716,
+        "paintMs": 84.90000009536743,
+        "fileReads": 0
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 1,
+        "historyLength": 1,
+        "commands": {
+          "plugin:event|listen": 25,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 349.60000002384186,
+        "jsBytes": 6466606,
+        "longTaskMs": 179,
+        "webglContexts": 0
+      },
+      "refresh": {
+        "readyMs": 198.10000002384186,
+        "jsBytes": 6466606,
+        "longTaskMs": 0,
+        "webglContexts": 0
+      },
+      "firstDraw": {
+        "stateReadyMs": 38.300000071525574,
+        "paintMs": 118.5,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 11,
+        "paintMs": 19.600000023841858,
+        "fileReads": 0
+      },
+      "returnDraw": {
+        "stateReadyMs": 20.700000047683716,
+        "paintMs": 90.10000002384186,
+        "fileReads": 0
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 1,
+        "historyLength": 1,
+        "commands": {
+          "plugin:event|listen": 25,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 350.60000002384186,
+        "jsBytes": 6466606,
+        "longTaskMs": 179,
+        "webglContexts": 0
+      },
+      "refresh": {
+        "readyMs": 198.20000004768372,
+        "jsBytes": 6466606,
+        "longTaskMs": 0,
+        "webglContexts": 0
+      },
+      "firstDraw": {
+        "stateReadyMs": 39.60000002384186,
+        "paintMs": 120,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 11,
+        "paintMs": 22.199999928474426,
+        "fileReads": 0
+      },
+      "returnDraw": {
+        "stateReadyMs": 20,
+        "paintMs": 87,
+        "fileReads": 0
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 1,
+        "historyLength": 1,
+        "commands": {
+          "plugin:event|listen": 25,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 349.89999997615814,
+        "jsBytes": 6466606,
+        "longTaskMs": 180,
+        "webglContexts": 0
+      },
+      "refresh": {
+        "readyMs": 198.80000007152557,
+        "jsBytes": 6466606,
+        "longTaskMs": 0,
+        "webglContexts": 0
+      },
+      "firstDraw": {
+        "stateReadyMs": 38,
+        "paintMs": 115.30000007152557,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 8.200000047683716,
+        "paintMs": 24.899999976158142,
+        "fileReads": 0
+      },
+      "returnDraw": {
+        "stateReadyMs": 18.800000071525574,
+        "paintMs": 84.5,
+        "fileReads": 0
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 1,
+        "historyLength": 1,
+        "commands": {
+          "plugin:event|listen": 25,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    }
+  ],
+  "importedPages": [
+    "src/pages/PageAngles/index.ts",
+    "src/pages/PageAudio/CreateAudio.tsx",
+    "src/pages/PageBackgroundChange/index.ts",
+    "src/pages/PageImage/TextToImage.tsx",
+    "src/pages/PageImageTo3DObject/index.ts",
+    "src/pages/PageImageTo3DWorld/index.ts",
+    "src/pages/PageImageWatermarkRemover/index.ts",
+    "src/pages/PageMoodboard/index.ts",
+    "src/pages/PageRemoveBackground/index.ts",
+    "src/pages/PageScene/index.tsx",
+    "src/pages/PageStoryboard/index.ts",
+    "src/pages/PageVideo/ImageToVideo.tsx",
+    "src/pages/PageVideoEditor/index.tsx",
+    "src/pages/PageVideoFrameExtractor/index.ts",
+    "src/pages/PageVideoWatermarkRemover/index.ts"
+  ],
+  "errors": []
+}

docs/performance/2026-09-26-before.json

@@ -0,0 +1,510 @@
+{
+  "timestamp": "2026-09-27T00:30:21.217Z",
+  "build": {
+    "builtAt": "2026-09-27T00:28:39.209Z",
+    "revision": "780e4494e995163fed1d677b88c3cf03b3fca63c",
+    "baselineOverlay": "HEAD",
+    "changedFiles": [
+      "frontend/apps/artcraft/app/src/pages/MainApp.tsx",
+      "frontend/apps/artcraft/app/src/pages/Stores/TabState.ts",
+      "frontend/package-lock.json",
+      "frontend/package.json"
+    ]
+  },
+  "environment": {
+    "platform": "darwin",
+    "arch": "arm64",
+    "cpu": "Apple M4 Pro",
+    "browser": "153.0.8010.53",
+    "node": "v24.13.0",
+    "runs": 7,
+    "viewport": "1440x1000@1",
+    "ipc": "mocked",
+    "network": "local assets only, browser cache disabled"
+  },
+  "summary": {
+    "startup": {
+      "readyMs": {
+        "median": 566.3999999761581,
+        "min": 532.3999999761581,
+        "max": 847.7999999523163
+      },
+      "jsBytes": {
+        "median": 9052991,
+        "min": 9052991,
+        "max": 9052991
+      },
+      "longTaskMs": {
+        "median": 336,
+        "min": 314,
+        "max": 407
+      },
+      "webglContexts": {
+        "median": 1,
+        "min": 1,
+        "max": 1
+      }
+    },
+    "refresh": {
+      "readyMs": {
+        "median": 248.60000002384186,
+        "min": 247.59999990463257,
+        "max": 351.1999999284744
+      },
+      "jsBytes": {
+        "median": 9052991,
+        "min": 9052991,
+        "max": 9052991
+      },
+      "longTaskMs": {
+        "median": 0,
+        "min": 0,
+        "max": 0
+      },
+      "webglContexts": {
+        "median": 1,
+        "min": 1,
+        "max": 1
+      }
+    },
+    "firstDraw": {
+      "stateReadyMs": {
+        "median": 40.40000009536743,
+        "min": 37.299999952316284,
+        "max": 43.299999952316284
+      },
+      "paintMs": {
+        "median": 120.90000009536743,
+        "min": 117.89999997615814,
+        "max": 126.79999995231628
+      },
+      "fileReads": {
+        "median": 0,
+        "min": 0,
+        "max": 0
+      }
+    },
+    "leaveDraw": {
+      "stateReadyMs": {
+        "median": 23.399999976158142,
+        "min": 20.100000023841858,
+        "max": 26
+      },
+      "paintMs": {
+        "median": 29.5,
+        "min": 21.200000047683716,
+        "max": 35.5
+      },
+      "fileReads": {
+        "median": 4,
+        "min": 4,
+        "max": 4
+      }
+    },
+    "returnDraw": {
+      "stateReadyMs": {
+        "median": 42.10000002384186,
+        "min": 36.59999990463257,
+        "max": 45.200000047683716
+      },
+      "paintMs": {
+        "median": 105.69999992847443,
+        "min": 100.89999997615814,
+        "max": 109.20000004768372
+      },
+      "fileReads": {
+        "median": 4,
+        "min": 4,
+        "max": 4
+      }
+    }
+  },
+  "samples": [
+    {
+      "startup": {
+        "readyMs": 847.7999999523163,
+        "jsBytes": 9052991,
+        "longTaskMs": 407,
+        "webglContexts": 1
+      },
+      "refresh": {
+        "readyMs": 351.1999999284744,
+        "jsBytes": 9052991,
+        "longTaskMs": 0,
+        "webglContexts": 1
+      },
+      "firstDraw": {
+        "stateReadyMs": 43.299999952316284,
+        "paintMs": 126.79999995231628,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 25.100000023841858,
+        "paintMs": 35.5,
+        "fileReads": 4
+      },
+      "returnDraw": {
+        "stateReadyMs": 36.59999990463257,
+        "paintMs": 100.89999997615814,
+        "fileReads": 4
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 0,
+        "historyLength": 2,
+        "commands": {
+          "plugin:event|listen": 26,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 539.3999999761581,
+        "jsBytes": 9052991,
+        "longTaskMs": 317,
+        "webglContexts": 1
+      },
+      "refresh": {
+        "readyMs": 264.60000002384186,
+        "jsBytes": 9052991,
+        "longTaskMs": 0,
+        "webglContexts": 1
+      },
+      "firstDraw": {
+        "stateReadyMs": 39.39999997615814,
+        "paintMs": 120.20000004768372,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 20.100000023841858,
+        "paintMs": 21.200000047683716,
+        "fileReads": 4
+      },
+      "returnDraw": {
+        "stateReadyMs": 41.60000002384186,
+        "paintMs": 104.60000002384186,
+        "fileReads": 4
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 0,
+        "historyLength": 2,
+        "commands": {
+          "plugin:event|listen": 26,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 561.9000000953674,
+        "jsBytes": 9052991,
+        "longTaskMs": 329,
+        "webglContexts": 1
+      },
+      "refresh": {
+        "readyMs": 248.19999992847443,
+        "jsBytes": 9052991,
+        "longTaskMs": 0,
+        "webglContexts": 1
+      },
+      "firstDraw": {
+        "stateReadyMs": 40.40000009536743,
+        "paintMs": 120.90000009536743,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 23.399999976158142,
+        "paintMs": 33.39999997615814,
+        "fileReads": 4
+      },
+      "returnDraw": {
+        "stateReadyMs": 37.299999952316284,
+        "paintMs": 101.10000002384186,
+        "fileReads": 4
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 0,
+        "historyLength": 2,
+        "commands": {
+          "plugin:event|listen": 26,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 569.5,
+        "jsBytes": 9052991,
+        "longTaskMs": 336,
+        "webglContexts": 1
+      },
+      "refresh": {
+        "readyMs": 248,
+        "jsBytes": 9052991,
+        "longTaskMs": 0,
+        "webglContexts": 1
+      },
+      "firstDraw": {
+        "stateReadyMs": 38,
+        "paintMs": 119.30000007152557,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 26,
+        "paintMs": 34.799999952316284,
+        "fileReads": 4
+      },
+      "returnDraw": {
+        "stateReadyMs": 45.200000047683716,
+        "paintMs": 109.20000004768372,
+        "fileReads": 4
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 0,
+        "historyLength": 2,
+        "commands": {
+          "plugin:event|listen": 26,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 567.5,
+        "jsBytes": 9052991,
+        "longTaskMs": 339,
+        "webglContexts": 1
+      },
+      "refresh": {
+        "readyMs": 248.60000002384186,
+        "jsBytes": 9052991,
+        "longTaskMs": 0,
+        "webglContexts": 1
+      },
+      "firstDraw": {
+        "stateReadyMs": 40.89999997615814,
+        "paintMs": 122.10000002384186,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 23.200000047683716,
+        "paintMs": 29.5,
+        "fileReads": 4
+      },
+      "returnDraw": {
+        "stateReadyMs": 42.10000002384186,
+        "paintMs": 105.69999992847443,
+        "fileReads": 4
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 0,
+        "historyLength": 2,
+        "commands": {
+          "plugin:event|listen": 26,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 566.3999999761581,
+        "jsBytes": 9052991,
+        "longTaskMs": 336,
+        "webglContexts": 1
+      },
+      "refresh": {
+        "readyMs": 281.39999997615814,
+        "jsBytes": 9052991,
+        "longTaskMs": 0,
+        "webglContexts": 1
+      },
+      "firstDraw": {
+        "stateReadyMs": 43.09999990463257,
+        "paintMs": 124.69999992847443,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 23.399999976158142,
+        "paintMs": 26.199999928474426,
+        "fileReads": 4
+      },
+      "returnDraw": {
+        "stateReadyMs": 42.799999952316284,
+        "paintMs": 107.19999992847443,
+        "fileReads": 4
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 0,
+        "historyLength": 2,
+        "commands": {
+          "plugin:event|listen": 26,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    },
+    {
+      "startup": {
+        "readyMs": 532.3999999761581,
+        "jsBytes": 9052991,
+        "longTaskMs": 314,
+        "webglContexts": 1
+      },
+      "refresh": {
+        "readyMs": 247.59999990463257,
+        "jsBytes": 9052991,
+        "longTaskMs": 0,
+        "webglContexts": 1
+      },
+      "firstDraw": {
+        "stateReadyMs": 37.299999952316284,
+        "paintMs": 117.89999997615814,
+        "fileReads": 0
+      },
+      "leaveDraw": {
+        "stateReadyMs": 21.5,
+        "paintMs": 22.899999976158142,
+        "fileReads": 4
+      },
+      "returnDraw": {
+        "stateReadyMs": 44.09999990463257,
+        "paintMs": 108.39999997615814,
+        "fileReads": 4
+      },
+      "fixture": {
+        "images": 4,
+        "imageSize": 1024,
+        "imageBytesEach": 2356706,
+        "strokes": 80,
+        "coordinatesPerStroke": 200
+      },
+      "afterReturn": {
+        "nodeCount": 84,
+        "selectedCount": 0,
+        "historyLength": 2,
+        "commands": {
+          "plugin:event|listen": 26,
+          "get_app_info_command": 1,
+          "list_image_models_command": 1,
+          "list_video_models_command": 1,
+          "get_task_queue_command": 1,
+          "estimate_image_cost_command": 5,
+          "storyteller_get_login_session_command": 1,
+          "plugin:http|fetch": 5,
+          "storyteller_get_credits_command": 1,
+          "storyteller_get_subscription_command": 1,
+          "plugin:window|is_maximized": 1,
+          "plugin:event|unlisten": 2
+        }
+      }
+    }
+  ],
+  "errors": []
+}

docs/website-login.md

@@ -0,0 +1,80 @@
+# Website login from the desktop app
+
+The React login/signup dialog calls Tauri commands only, including its startup
+session check and password forms. Website and QR actions appear only in login
+mode. Tauri never connects to MySQL; the desktop uses Rust HTTP API bindings. Creating/polling login challenges and
+verifying `/v1/session` use `artcraft_client::endpoints::users::login_challenges`.
+The Rust command uses `AppEnvConfigs.storyteller_host` for every request, keeps the
+private device token in native memory, and returns only a local challenge handle,
+approval URL/code/deadline, status, and the verified user to JavaScript. The signed
+session cookie never crosses IPC or gets written to JavaScript local storage.
+
+After redemption, Rust verifies the signed session against the same API host,
+installs the server's cookie into the native HTTP jar and credential manager, and
+persists the jar. Closing the dialog removes the local handle; a cancellation
+while HTTP is in flight prevents installing the late response. Retries retrieve
+the same server session. Neither creation nor website approval pre-creates one.
+
+## Session response compatibility
+
+A server feature flag added after a desktop release must not prevent login. The
+session decoder keeps known feature flags and ignores unknown flag names, such
+as `use_qt` on older clients. Malformed flag values and required authentication
+fields still fail validation. Tests cover a real Rust HTTP session response with
+both known and future flags, followed by native cookie installation/persistence.
+A late startup session check cannot reset an active or completed website login.
+
+## Diagnosing 401 responses
+
+`storyteller_activity_thread` reports errors from `/v1/analytics/active_user_v2`.
+This is the background activity ping, not the login-challenge endpoint. It requires
+a user session. An anonymous `visitor` cookie alone is now skipped. Expired or
+revoked sessions can still produce a 401 and require signing in again.
+
+Activity failures log the configured API origin (including port), endpoint, and
+error. Native website-login requests/failures log origin, endpoint, and HTTP
+status. Request bodies, device tokens, approval URLs, and signed cookies are not
+logged by the new client, including at debug level.
+
+## API environment
+
+`~/Artcraft/settings/env_configs.json` controls the native API host:
+
+```json
+{"storyteller_host":"localhost","storyteller_port":12345}
+```
+
+Local mode uses `http://localhost:12345` and a local approval website at
+`http://localhost:4201/login/desktop`. Run storyteller-web with its migrations
+applied, and the services webapp with `USE_LOCAL_API=1`. The local website must
+also use the local API. A challenge in a local database cannot be approved on the
+production website, even when that browser already has a production session.
+
+For the production API and production website, use `"storyteller_host":"production"`
+(or omit the override), then restart ArtCraft. API host configuration is not
+silently changed by login. Local and production approval URLs cannot be mixed.
+Localhost development URLs are for the same computer; mobile QR testing needs
+a shared/deployed environment.
+
+## Tests
+
+From the desktop repository:
+
+```sh
+SQLX_OFFLINE=true cargo test --offline -p artcraft --lib login_bridge_tests
+cd frontend
+npm exec vitest -- run --config libs/components/login-modal/vite.config.ts src/lib/DesktopLoginBridge.spec.tsx src/lib/login-modal.spec.tsx
+```
+
+Native tests use only ephemeral loopback HTTP servers and temporary cookie stores.
+They exercise the real API bindings and the command implementation, including
+cookie verification/persistence, rejection, expiry, retries, in-flight cancellation,
+origin separation, no redirects, redacted errors, visitor-only telemetry, future
+feature flags, malformed session data, and password login/signup/session checks.
+UI tests prohibit JavaScript HTTP and runtime API imports. They verify the IPC
+contract, native browser opening, QR/code display, status, backoff, cleanup,
+login-only button placement, native password forms, and stale session responses.
+
+The services repository also has real MySQL integration tests for approval,
+redemption, rejection, concurrency, and downstream authentication, using isolated
+local databases. No test contacts a production API or database.

frontend/apps/artcraft/app/src/components/signaled/TopBar/TopBar.tsx

@@ -596,6 +596,7 @@ export const TopBar = ({ pageName }: Props) => {
 
               <Tooltip content="Settings" position="bottom" delay={300}>
                 <Button
+                  aria-label="Settings"
                   variant="secondary"
                   icon={SettingsIcon}
                   iconClassName="h-5 w-5 shrink-0"

frontend/apps/artcraft/app/src/pages/MainApp.tsx

@@ -10,8 +10,7 @@
 // siblings, never wrapped by EngineProvider, so they have no
 // dependency on the 3D engine being present.
 
-import { useEffect, useState } from "react";
-import * as gpu from "detect-gpu";
+import { lazy, Suspense, useEffect } from "react";
 import { useSignals } from "@preact/signals-react/runtime";
 
 import { TopBar } from "~/components";
@@ -58,26 +57,55 @@ import { useTextToImageStore } from "./PageImage/TextToImageStore";
 
 import { AppsIndexPage } from "./PageApps/AppsIndexPage";
 import PageDraw from "./PageDraw/PageDraw";
-import TextToImage from "./PageImage/TextToImage";
-import ImageToVideo from "./PageVideo/ImageToVideo";
-import CreateAudio from "./PageAudio/CreateAudio";
-import { VideoFrameExtractor } from "./PageVideoFrameExtractor";
-import { VideoWatermarkRemover } from "./PageVideoWatermarkRemover";
-import { ImageWatermarkRemover } from "./PageImageWatermarkRemover";
-import { ImageTo3DObject } from "./PageImageTo3DObject";
-import { ImageTo3DWorld } from "./PageImageTo3DWorld";
-import { RemoveBackground } from "./PageRemoveBackground";
-import { Angles } from "./PageAngles";
-import { Storyboard } from "./PageStoryboard";
-import { PageBackgroundChange } from "./PageBackgroundChange";
-import { PageScene } from "./PageScene";
-import { PageVideoEditor } from "./PageVideoEditor";
-import { PageMoodboard } from "./PageMoodboard";
 import {
   topNavMediaId,
   topNavMediaUrl,
 } from "~/components/signaled/TopBar/TopBar";
 
+// Load editors when selected, keeping their code off the launch path. Drawing
+// stays eager: its shared store/UI is already needed by the shell, so deferring
+// its small host adapter adds first-open latency for very little byte saving.
+// Declare lazy components once so navigating does not recreate their identity.
+const TextToImage = lazy(() => import("./PageImage/TextToImage"));
+const ImageToVideo = lazy(() => import("./PageVideo/ImageToVideo"));
+const CreateAudio = lazy(() => import("./PageAudio/CreateAudio"));
+const VideoFrameExtractor = lazy(() =>
+  import("./PageVideoFrameExtractor").then((m) => ({ default: m.VideoFrameExtractor })),
+);
+const VideoWatermarkRemover = lazy(() =>
+  import("./PageVideoWatermarkRemover").then((m) => ({ default: m.VideoWatermarkRemover })),
+);
+const ImageWatermarkRemover = lazy(() =>
+  import("./PageImageWatermarkRemover").then((m) => ({ default: m.ImageWatermarkRemover })),
+);
+const ImageTo3DObject = lazy(() =>
+  import("./PageImageTo3DObject").then((m) => ({ default: m.ImageTo3DObject })),
+);
+const ImageTo3DWorld = lazy(() =>
+  import("./PageImageTo3DWorld").then((m) => ({ default: m.ImageTo3DWorld })),
+);
+const RemoveBackground = lazy(() =>
+  import("./PageRemoveBackground").then((m) => ({ default: m.RemoveBackground })),
+);
+const Angles = lazy(() =>
+  import("./PageAngles").then((m) => ({ default: m.Angles })),
+);
+const Storyboard = lazy(() =>
+  import("./PageStoryboard").then((m) => ({ default: m.Storyboard })),
+);
+const PageBackgroundChange = lazy(() =>
+  import("./PageBackgroundChange").then((m) => ({ default: m.PageBackgroundChange })),
+);
+const PageScene = lazy(() =>
+  import("./PageScene").then((m) => ({ default: m.PageScene })),
+);
+const PageVideoEditor = lazy(() =>
+  import("./PageVideoEditor").then((m) => ({ default: m.PageVideoEditor })),
+);
+const PageMoodboard = lazy(() =>
+  import("./PageMoodboard").then((m) => ({ default: m.PageMoodboard })),
+);
+
 interface Props {
   sceneToken?: string;
 }
@@ -121,8 +149,7 @@ export const MainApp = ({ sceneToken }: Props) => {
     toast.error("File deleted.");
   });
 
-  // Session probe (runs once per shell mount) and GPU detection.
-  // Both are app-wide concerns, not 3D-only.
+  // Session probe (runs once per shell mount).
   useEffect(() => {
     const usersApi = new UsersApi();
     usersApi.GetSession().then((result) => {
@@ -132,20 +159,6 @@ export const MainApp = ({ sceneToken }: Props) => {
     });
   }, []);
 
-  const [, setValidGpu] = useState("unknown");
-  useEffect(() => {
-    const { getGPUTier } = gpu;
-    getGPUTier().then((gpuTier) => {
-      console.log("GPU tier", gpuTier);
-      let isValid = false;
-      const fps = gpuTier.fps || 0;
-      if (gpuTier.tier > 1) isValid = true;
-      if (fps > 15) isValid = true;
-      if (gpuTier.gpu === "apple gpu (Apple GPU)") isValid = true;
-      setValidGpu(isValid ? "valid" : "error");
-    });
-  }, []);
-
   const { triggerRecheck } = useLoginModalStore();
   const { isOpen: isCreditsOpen, closeModal: closeCreditsModal } =
     useCreditsModalStore();
@@ -179,7 +192,18 @@ export const MainApp = ({ sceneToken }: Props) => {
         }}
       />
 
-      <TabBody sceneToken={sceneToken} />
+      <Suspense
+        fallback={
+          <div
+            role="status"
+            className="flex h-[calc(100vh-56px)] items-center justify-center text-base-fg/60"
+          >
+            Loading…
+          </div>
+        }
+      >
+        <TabBody sceneToken={sceneToken} />
+      </Suspense>
 
       <GalleryDragComponent />
       <ErrorDialog />
@@ -210,7 +234,7 @@ export const MainApp = ({ sceneToken }: Props) => {
 };
 
 const TabBody = ({ sceneToken }: { sceneToken?: string }) => {
-  const tabStore = useTabStore();
+  const activeTabId = useTabStore((s) => s.activeTabId);
   const storyboardPageEnabled = useStoryboardPageEnabled();
 
   // The 3D case stays unwrapped because Stage3DBody (lib) already
@@ -218,7 +242,7 @@ const TabBody = ({ sceneToken }: { sceneToken?: string }) => {
   // top-level children may use position: fixed (e.g. PageDraw); the
   // wrapping <div> scopes them so they don't stack as siblings of
   // the TopBar at the MainApp root.
-  switch (tabStore.activeTabId) {
+  switch (activeTabId) {
     case "3D":
       return <PageScene sceneToken={sceneToken} />;
     case "APPS":

frontend/apps/artcraft/app/src/pages/Stores/TabState.spec.ts

@@ -0,0 +1,84 @@
+import { beforeEach, expect, it } from "vitest";
+import { useTabStore } from "./TabState";
+import { useSceneStore } from "../../../../../../libs/components/pagedraw/src/lib/stores/SceneState";
+import { Node } from "../../../../../../libs/components/pagedraw/src/lib/Node";
+
+const initialScene = useSceneStore.getInitialState();
+const initialTabs = useTabStore.getInitialState();
+
+beforeEach(() => {
+  useSceneStore.setState(initialScene, true);
+  useTabStore.setState(initialTabs, true);
+});
+
+it("retains decoded images, selection, model metadata, and history across tab changes", async () => {
+  const image = new Node({
+    id: "image", type: "image", x: 10, y: 20, width: 512, height: 512,
+    fill: "transparent", imageFile: new File(["pixels"], "artwork.png"),
+    imageElement: new Image(), modelUrl: "blob:model",
+  });
+  useSceneStore.setState({ drawNodes: [image], selectedNodeIds: [image.id] });
+  useSceneStore.getState().saveState();
+  const before = useSceneStore.getState();
+
+  await useTabStore.getState().setActiveTab("2D");
+  await useTabStore.getState().setActiveTab("APPS");
+  await useTabStore.getState().setActiveTab("2D");
+
+  const after = useSceneStore.getState();
+  expect(after.drawNodes).toBe(before.drawNodes);
+  expect(after.drawNodes[0]).toBe(image);
+  expect(after.selectedNodeIds).toEqual([image.id]);
+  expect(after.history).toBe(before.history);
+  expect(after.historyIndex).toBe(before.historyIndex);
+});
+
+it("keeps redo available when navigating away after undo", async () => {
+  const scene = useSceneStore.getState();
+  useSceneStore.setState({ drawNodes: [rectangle("first")] });
+  scene.saveState();
+  useSceneStore.setState({ drawNodes: [rectangle("first"), rectangle("second")] });
+  scene.saveState();
+  await scene.undo();
+
+  await useTabStore.getState().setActiveTab("2D");
+  await useTabStore.getState().setActiveTab("IMAGE");
+  await useTabStore.getState().setActiveTab("2D");
+  await useSceneStore.getState().redo();
+
+  expect(useSceneStore.getState().drawNodes.map((node) => node.id)).toEqual(["first", "second"]);
+});
+
+it("keeps edits made while away and does not restore an old scene after a gallery reset", async () => {
+  useSceneStore.setState({ drawNodes: [rectangle("old")] });
+  await useTabStore.getState().setActiveTab("2D");
+  await useTabStore.getState().setActiveTab("APPS");
+  useSceneStore.getState().RESET();
+  useSceneStore.setState({ drawNodes: [rectangle("new")] });
+  await useTabStore.getState().setActiveTab("2D");
+  expect(useSceneStore.getState().drawNodes.map((node) => node.id)).toEqual(["new"]);
+});
+
+it("honors the latest rapid navigation request", async () => {
+  await useTabStore.getState().setActiveTab("2D");
+  const results = await Promise.all([
+    useTabStore.getState().setActiveTab("IMAGE"),
+    useTabStore.getState().setActiveTab("VIDEO"),
+  ]);
+  expect(results).toEqual([true, true]);
+  expect(useTabStore.getState().activeTabId).toBe("VIDEO");
+});
+
+it("still exports a portable scene when explicitly requested", async () => {
+  const image = new Node({
+    id: "image", type: "image", x: 0, y: 0, width: 1, height: 1,
+    fill: "transparent", imageFile: new File(["pixels"], "image.png", { type: "image/png" }),
+  });
+  useSceneStore.setState({ drawNodes: [image] });
+  const exported = JSON.parse(await useSceneStore.getState().exportSceneAsJson());
+  expect(exported.drawNodes[0].imageDataUrl).toBe("data:image/png;base64,cGl4ZWxz");
+});
+
+function rectangle(id: string) {
+  return new Node({ id, type: "rectangle", x: 0, y: 0, width: 100, height: 100, fill: "red" });
+}

frontend/apps/artcraft/app/src/pages/Stores/TabState.ts

@@ -1,5 +1,4 @@
 import { create } from "zustand";
-import { useSceneStore } from "@storyteller/ui-pagedraw";
 
 export type TabId =
   | "2D"
@@ -42,40 +41,14 @@ export const useTabStore = create<TabState>((set, get) => ({
   tabData: {},
 
   setActiveTab: async (newTabId) => {
-    const currentTabId = get().activeTabId;
-
     // Don't do anything if we're already on this tab
-    if (currentTabId === newTabId) return true;
+    if (get().activeTabId === newTabId) return true;
 
-    try {
-      // Save current 2D state if we're leaving 2D tab
-      if (currentTabId === "2D") {
-        const sceneStore = useSceneStore.getState();
-        const sceneState = await sceneStore.serializeSceneToString();
-        set((state) => ({
-          tabData: {
-            ...state.tabData,
-            "2D": sceneState,
-          },
-        }));
-      }
-
-      // Load 2D state if we're entering 2D tab
-      if (newTabId === "2D") {
-        const savedState = get().tabData["2D"];
-        if (savedState) {
-          const sceneStore = useSceneStore.getState();
-          sceneStore.loadSceneFromString(savedState);
-        }
-      }
-
-      // Update active tab
-      set({ activeTabId: newTabId });
-      return true;
-    } catch (error) {
-      console.error("Error during tab change:", error);
-      return false;
-    }
+    // The drawing store outlives its React page. Keep its live image objects,
+    // selection, and undo history when switching tabs. Export/import is for
+    // files; round-tripping here reread every image and rebuilt the scene.
+    set({ activeTabId: newTabId });
+    return true;
   },
 
   updateTabData: (tabId, data) => {

frontend/apps/artcraft/vite.config.ts

@@ -1,4 +1,5 @@
 import { defineConfig, type Plugin } from "vite";
+import react from "@vitejs/plugin-react";
 import tsconfigPaths from "vite-tsconfig-paths";
 import path from "path";
 import { resolve } from "node:path";
@@ -58,6 +59,7 @@ export default defineConfig({
     },
   },
   plugins: [
+    react(),
     sparkWasmDataUrlFix(),
     tsconfigPaths({
       // Resolve workspace packages to source for every importer, including shared

frontend/libs/components/login-modal/src/lib/DesktopLoginBridge.spec.tsx

@@ -0,0 +1,167 @@
+import { act, cleanup, fireEvent, render, screen } from "@testing-library/react";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { DesktopLoginBridge } from "./DesktopLoginBridge";
+
+const { native, forbiddenFetch } = vi.hoisted(() => ({ native: vi.fn(), forbiddenFetch: vi.fn(() => { throw new Error("JavaScript must never call HTTP for login"); }) }));
+vi.mock("@tauri-apps/api/core", () => ({ invoke: native }));
+vi.mock("@storyteller/tauri-utils", () => ({ FetchProxy: forbiddenFetch }));
+vi.mock("@storyteller/api", () => { throw new Error("Login UI must only import API types"); });
+vi.mock("qrcode.react", () => ({ QRCodeSVG: ({ value }: { value: string }) => <svg role="img" aria-label="Login QR" data-value={value} /> }));
+
+const CHALLENGE_ID = "local-handle";
+const APPROVAL_URL = `https://app.getartcraft.com/login/desktop#approval_token=${"A".repeat(43)}`;
+const USER = { user_token: "user_fixture", username: "google_user" };
+let outcome: Record<string, unknown>;
+let expiresIn: number;
+
+beforeEach(() => {
+  vi.useFakeTimers();
+  vi.setSystemTime(new Date("2026-09-25T12:00:00Z"));
+  vi.stubGlobal("fetch", forbiddenFetch);
+  localStorage.clear();
+  native.mockReset();
+  forbiddenFetch.mockClear();
+  expiresIn = 1_200_000;
+  outcome = { status: "pending", maybe_failure_type: null, maybe_user: null };
+  native.mockImplementation(async (command: string) => {
+    if (command === "storyteller_create_login_challenge_command") return {
+      challenge_id: CHALLENGE_ID, verification_url: APPROVAL_URL,
+      confirmation_code: "WDJBMJHT", expires_at: new Date(Date.now() + expiresIn).toISOString(), poll_interval_seconds: 5,
+    };
+    if (command === "storyteller_poll_login_challenge_command") return outcome;
+    if (command === "storyteller_cancel_login_challenge_command" || command === "plugin:opener|open_url") return;
+    throw new Error(`Unexpected native command: ${command}`);
+  });
+});
+afterEach(() => {
+  cleanup();
+  expect(forbiddenFetch).not.toHaveBeenCalled();
+  expect(localStorage.getItem("artcraft_signed_session")).toBeNull();
+  vi.unstubAllGlobals();
+  vi.useRealTimers();
+});
+
+describe("desktop native login bridge integration", () => {
+  it("creates through IPC and opens the native browser with the matching QR/code", async () => {
+    render(<DesktopLoginBridge onSuccess={vi.fn()} />);
+    await start("Login with Website");
+    expect(native).toHaveBeenCalledWith("storyteller_create_login_challenge_command");
+    expect(native).toHaveBeenCalledWith("plugin:opener|open_url", { url: APPROVAL_URL });
+    expect(screen.getByRole("img", { name: "Login QR" }).getAttribute("data-value")).toBe(APPROVAL_URL);
+    expect(screen.getByText("WDJB-MJHT")).toBeTruthy();
+  });
+
+  it("polls with only a local handle and accepts the natively verified user without seeing credentials", async () => {
+    const success = vi.fn();
+    render(<DesktopLoginBridge onSuccess={success} />);
+    await start("Scan to Login");
+    await tick(5000);
+    expect(success).not.toHaveBeenCalled();
+    outcome = { status: "redeemed", maybe_failure_type: null, maybe_user: USER };
+    await tick(5000);
+    expect(native).toHaveBeenCalledWith("storyteller_poll_login_challenge_command", { challengeId: CHALLENGE_ID });
+    expect(success).toHaveBeenCalledWith(USER);
+    expect(native).toHaveBeenCalledWith("storyteller_cancel_login_challenge_command", { challengeId: CHALLENGE_ID });
+    const count = calls("storyteller_poll_login_challenge_command");
+    await tick(30_000);
+    expect(calls("storyteller_poll_login_challenge_command")).toBe(count);
+  });
+
+  it("stops after decline", async () => {
+    const success = vi.fn();
+    outcome = { status: "failed", maybe_failure_type: "user_declined" };
+    render(<DesktopLoginBridge onSuccess={success} />);
+    await start("Scan to Login");
+    await tick(5000);
+    expect(screen.getByText("Login was declined on the website.")).toBeTruthy();
+    expect(success).not.toHaveBeenCalled();
+    await tick(60_000);
+    expect(calls("storyteller_poll_login_challenge_command")).toBe(1);
+  });
+
+  it("expires locally and cancels the native attempt without creating another", async () => {
+    expiresIn = 5000;
+    render(<DesktopLoginBridge onSuccess={vi.fn()} />);
+    await start("Scan to Login");
+    await tick(5000);
+    expect(screen.getByText("Login request expired. Start a new request.")).toBeTruthy();
+    expect(calls("storyteller_create_login_challenge_command")).toBe(1);
+    expect(calls("storyteller_poll_login_challenge_command")).toBe(0);
+    expect(calls("storyteller_cancel_login_challenge_command")).toBe(1);
+  });
+
+  it("backs off a native network failure and retries the same local handle", async () => {
+    render(<DesktopLoginBridge onSuccess={vi.fn()} />);
+    await start("Scan to Login");
+    native.mockRejectedValueOnce({ message: "Disconnected", status: null, retryable: true });
+    await tick(5000);
+    expect(screen.getByText("Connection interrupted. Retrying…")).toBeTruthy();
+    await tick(9999);
+    expect(calls("storyteller_poll_login_challenge_command")).toBe(1);
+    await tick(1);
+    expect(calls("storyteller_poll_login_challenge_command")).toBe(2);
+  });
+
+  it("cancels on unmount and ignores a late command result", async () => {
+    let resolve: (value: unknown) => void = () => {};
+    const success = vi.fn();
+    const view = render(<DesktopLoginBridge onSuccess={success} />);
+    await start("Scan to Login");
+    native.mockImplementationOnce(() => new Promise((done) => { resolve = done; }));
+    await tick(5000);
+    view.unmount();
+    expect(native).toHaveBeenCalledWith("storyteller_cancel_login_challenge_command", { challengeId: CHALLENGE_ID });
+    await act(async () => { resolve({ status: "redeemed", maybe_user: USER }); });
+    expect(success).not.toHaveBeenCalled();
+  });
+
+  it("ignores an in-flight redemption after Back and can start a new challenge", async () => {
+    let resolve: (value: unknown) => void = () => {};
+    const success = vi.fn();
+    render(<DesktopLoginBridge onSuccess={success} />);
+    await start("Scan to Login");
+    native.mockImplementationOnce(() => new Promise((done) => { resolve = done; }));
+    await tick(5000);
+    await start("Back");
+    expect(native).toHaveBeenCalledWith("storyteller_cancel_login_challenge_command", { challengeId: CHALLENGE_ID });
+    await act(async () => { resolve({ status: "redeemed", maybe_user: USER }); });
+    expect(success).not.toHaveBeenCalled();
+    expect(screen.queryByRole("img", { name: "Login QR" })).toBeNull();
+    await tick(30_000);
+    expect(calls("storyteller_poll_login_challenge_command")).toBe(1);
+
+    await start("Scan to Login");
+    expect(screen.getByRole("img", { name: "Login QR" })).toBeTruthy();
+    outcome = { status: "redeemed", maybe_user: USER };
+    await tick(5000);
+    expect(success).toHaveBeenCalledExactlyOnceWith(USER);
+  });
+
+  it("fails closed on a future status", async () => {
+    outcome = { status: "future_state", maybe_user: USER };
+    render(<DesktopLoginBridge onSuccess={vi.fn()} />);
+    await start("Scan to Login");
+    await tick(5000);
+    expect(screen.getByText("This login request could not be completed. Start a new request.")).toBeTruthy();
+  });
+
+  it("shows the native host/status diagnostic and stops on terminal HTTP errors", async () => {
+    render(<DesktopLoginBridge onSuccess={vi.fn()} />);
+    await start("Scan to Login");
+    native.mockRejectedValueOnce({ message: "http://localhost:12345: Login server rejected the request (HTTP 401)", status: 401, retryable: false });
+    await tick(5000);
+    expect(screen.getByText(/localhost:12345.*401/)).toBeTruthy();
+    await tick(60_000);
+    expect(calls("storyteller_poll_login_challenge_command")).toBe(1);
+  });
+});
+
+async function start(label: string) {
+  await act(async () => { fireEvent.click(screen.getByRole("button", { name: label })); });
+}
+async function tick(ms: number) {
+  await act(async () => { await vi.advanceTimersByTimeAsync(ms); });
+}
+function calls(command: string) {
+  return native.mock.calls.filter(([name]) => name === command).length;
+}

frontend/libs/components/login-modal/src/lib/DesktopLoginBridge.tsx

@@ -0,0 +1,134 @@
+import { useEffect, useRef, useState } from "react";
+import { QRCodeSVG } from "qrcode.react";
+import { invoke } from "@tauri-apps/api/core";
+import { ArrowLeftIcon } from "lucide-react";
+import type { UserInfo } from "@storyteller/api";
+import { createDesktopLoginChallenge, pollDesktopLoginChallenge, cancelDesktopLoginChallenge, isDesktopLoginError, type DesktopLoginChallenge } from "./NativeLoginBridge";
+
+const OpenUrl = (url: string) => invoke("plugin:opener|open_url", { url });
+
+export function DesktopLoginBridge({ onSuccess, onStart, onActiveChange }: { onSuccess: (user: UserInfo) => void; onStart?: () => void; onActiveChange?: (active: boolean) => void }) {
+  const [challenge, setChallenge] = useState<DesktopLoginChallenge | null>(null);
+  const [busy, setBusy] = useState(false);
+  const [message, setMessage] = useState("");
+  const [now, setNow] = useState(Date.now);
+  const generation = useRef(0);
+  const success = useRef(onSuccess);
+  success.current = onSuccess;
+  const isActive = busy || challenge !== null;
+
+  useEffect(() => { onActiveChange?.(isActive); }, [isActive, onActiveChange]);
+
+  useEffect(() => () => { generation.current += 1; }, []);
+  useEffect(() => {
+    if (!challenge) return;
+    const timer = window.setInterval(() => setNow(Date.now()), 1000);
+    return () => window.clearInterval(timer);
+  }, [challenge]);
+
+  useEffect(() => {
+    if (!challenge) return;
+    let active = true;
+    const current = generation.current;
+    let timer: ReturnType<typeof setTimeout>;
+    let delay = Math.max(5, challenge.poll_interval_seconds) * 1000;
+    const deadline = Date.parse(challenge.expires_at);
+    const finish = (text: string) => {
+      setChallenge(null);
+      setMessage(text);
+    };
+    const poll = async () => {
+      if (!active || current !== generation.current) return;
+      if (Date.now() >= deadline) { finish("Login request expired. Start a new request."); return; }
+      try {
+        const result = await pollDesktopLoginChallenge(challenge.challenge_id);
+        if (!active || current !== generation.current) return;
+        if (result.status === "redeemed") {
+          if (!result.maybe_user) throw new Error("Native session verification did not return a user");
+          active = false;
+          setChallenge(null);
+          setMessage("Signed in successfully.");
+          success.current(result.maybe_user);
+          return;
+        }
+        if (result.status === "failed") {
+          finish(result.maybe_failure_type === "user_declined" ? "Login was declined on the website." : result.maybe_failure_type === "expired" ? "Login request expired. Start a new request." : "Login failed. Start a new request.");
+          return;
+        }
+        if (!["pending", "approved"].includes(result.status)) {
+          finish("This login request could not be completed. Start a new request.");
+          return;
+        }
+        delay = Math.max(5, challenge.poll_interval_seconds) * 1000;
+        setMessage("Waiting for your confirmation on the website…");
+      } catch (error) {
+        if (!active || current !== generation.current) return;
+        if (isDesktopLoginError(error) && !error.retryable) {
+          finish(error.message);
+          return;
+        }
+        delay = Math.min(delay * 2, 30_000);
+        setMessage("Connection interrupted. Retrying…");
+      }
+      if (active) timer = setTimeout(poll, Math.min(delay, Math.max(0, deadline - Date.now())));
+    };
+    timer = setTimeout(poll, Math.min(delay, Math.max(0, deadline - Date.now())));
+    return () => {
+      active = false;
+      clearTimeout(timer);
+      void cancelDesktopLoginChallenge(challenge.challenge_id).catch(() => {});
+    };
+  }, [challenge]);
+
+  const start = async (openBrowser: boolean) => {
+    if (busy) return;
+    onStart?.();
+    const current = ++generation.current;
+    setBusy(true);
+    setMessage("");
+    try {
+      const created = await createDesktopLoginChallenge();
+      if (current !== generation.current) {
+        void cancelDesktopLoginChallenge(created.challenge_id).catch(() => {});
+        return;
+      }
+      // Rust validates the approval URL against the configured API environment.
+      setNow(Date.now());
+      setChallenge(created);
+      setMessage("Waiting for your confirmation on the website…");
+      if (openBrowser) await OpenUrl(created.verification_url);
+    } catch (error) {
+      if (current === generation.current) setMessage(isDesktopLoginError(error) ? error.message : "Unable to open website login. Try again or scan the QR code.");
+    } finally {
+      if (current === generation.current) setBusy(false);
+    }
+  };
+
+  const back = () => {
+    generation.current += 1;
+    setChallenge(null);
+    setBusy(false);
+    setMessage("");
+  };
+
+  const remaining = challenge ? Math.max(0, Math.ceil((Date.parse(challenge.expires_at) - now) / 1000)) : 0;
+  return <section aria-label="Website login" className="mb-6 rounded-xl border border-white/15 p-4 text-center">
+    {isActive && <div className="mb-4 text-left">
+      <button type="button" className="inline-flex items-center gap-2 text-sm text-white/70 hover:text-white" onClick={back}>
+        <ArrowLeftIcon size={16} aria-hidden="true" /> Back
+      </button>
+    </div>}
+    {challenge ? <>
+      <p className="mb-3 text-sm text-white/70">Scan with your phone or approve in your browser.</p>
+      <QRCodeSVG value={challenge.verification_url} size={192} marginSize={4} title="Scan to approve desktop login" className="mx-auto rounded-lg" />
+      <p className="my-3 font-mono text-2xl tracking-widest">{challenge.confirmation_code.slice(0, 4)}-{challenge.confirmation_code.slice(4)}</p>
+      <p className="mb-3 text-xs text-white/60">Verify this code on the website. Expires in {Math.floor(remaining / 60)}:{String(remaining % 60).padStart(2, "0")}</p>
+      <button type="button" className="rounded-lg border border-white/30 px-4 py-2" onClick={() => OpenUrl(challenge.verification_url).catch(() => setMessage("Unable to open the browser. Scan the QR code instead."))}>Open website</button>
+    </> : busy ? <p className="text-sm text-white/70" role="status">Preparing login…</p> : <div className="flex flex-col gap-2">
+      <button type="button" className="rounded-lg bg-white px-4 py-3 font-medium text-black" onClick={() => start(true)}>Login with Website</button>
+      <button type="button" className="rounded-lg border border-white/30 px-4 py-2" onClick={() => start(false)}>Scan to Login</button>
+      <p className="text-xs text-white/50">Use Google or any account already signed in on the website.</p>
+    </div>}
+    {message && <p className="mt-3 text-sm text-white/70" role="status">{message}</p>}
+  </section>;
+}

frontend/libs/components/login-modal/src/lib/LoginSuccess.module.css

@@ -0,0 +1,86 @@
+.panel {
+  position: relative;
+  isolation: isolate;
+  display: flex;
+  width: 100%;
+  flex-direction: column;
+  align-items: center;
+  overflow: hidden;
+  padding: 56px 32px;
+  text-align: center;
+  background: radial-gradient(ellipse at 50% 0%, rgb(94 234 212 / 9%), transparent 70%);
+  animation: arrive 450ms ease-out both;
+}
+
+.glow {
+  position: absolute;
+  z-index: -1;
+  top: -52px;
+  left: calc(50% - 144px);
+  width: 288px;
+  height: 288px;
+  border-radius: 50%;
+  background: radial-gradient(circle, rgb(94 234 212 / 24%), rgb(129 140 248 / 12%) 45%, transparent 70%);
+  filter: blur(24px);
+  pointer-events: none;
+  animation: glow 2400ms ease-in-out infinite;
+}
+
+.badge {
+  display: flex;
+  width: 76px;
+  height: 76px;
+  align-items: center;
+  justify-content: center;
+  margin-bottom: 28px;
+  border: 1px solid rgb(153 246 228 / 35%);
+  border-radius: 50%;
+  color: #b4f7de;
+  background: linear-gradient(145deg, rgb(153 246 228 / 16%), rgb(94 234 212 / 4%));
+  box-shadow: 0 0 0 8px rgb(94 234 212 / 4%), 0 0 44px rgb(94 234 212 / 18%), inset 0 1px 0 rgb(255 255 255 / 12%);
+}
+
+.heading {
+  margin: 0;
+  max-width: 100%;
+  color: rgb(255 255 255 / 80%);
+  font-size: 18px;
+  font-weight: 500;
+  line-height: 1.5;
+}
+
+.username {
+  display: block;
+  margin-top: 4px;
+  overflow-wrap: anywhere;
+  color: #b4f7de;
+  background: linear-gradient(100deg, #d4ffec, #99f6e4 55%, #c7d2fe);
+  background-clip: text;
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  font-size: 30px;
+  font-weight: 600;
+  letter-spacing: -0.025em;
+  line-height: 1.25;
+}
+
+.caption {
+  margin: 14px 0 0;
+  color: rgb(255 255 255 / 50%);
+  font-size: 14px;
+  line-height: 1.5;
+}
+
+@keyframes arrive {
+  from { opacity: 0; transform: translateY(8px) scale(0.98); }
+  to { opacity: 1; transform: translateY(0) scale(1); }
+}
+
+@keyframes glow {
+  0%, 100% { opacity: 0.7; transform: scale(0.95); }
+  50% { opacity: 1; transform: scale(1.06); }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .panel, .glow { animation: none; }
+}

frontend/libs/components/login-modal/src/lib/LoginSuccess.tsx

@@ -0,0 +1,18 @@
+import { CheckIcon } from "lucide-react";
+import styles from "./LoginSuccess.module.css";
+
+export function LoginSuccess({ username }: { username: string }) {
+  return (
+    <div className={styles.panel} role="status" aria-live="polite" aria-atomic="true">
+      <div className={styles.glow} aria-hidden="true" />
+      <div className={styles.badge} aria-hidden="true">
+        <CheckIcon size={34} strokeWidth={2} />
+      </div>
+      <h2 className={styles.heading}>
+        Logged in as{" "}
+        <span className={styles.username}>{username}</span>
+      </h2>
+      <p className={styles.caption}>You're ready to create.</p>
+    </div>
+  );
+}

frontend/libs/components/login-modal/src/lib/NativeLoginBridge.ts

@@ -0,0 +1,38 @@
+import { invoke } from "@tauri-apps/api/core";
+import type { UserInfo } from "@storyteller/api";
+
+export interface DesktopLoginChallenge {
+  challenge_id: string;
+  verification_url: string;
+  confirmation_code: string;
+  expires_at: string;
+  poll_interval_seconds: number;
+}
+
+export interface DesktopLoginOutcome {
+  status: string;
+  maybe_failure_type: string | null;
+  maybe_user: UserInfo | null;
+}
+
+export interface DesktopLoginError {
+  status: number | null;
+  message: string;
+  retryable: boolean;
+}
+
+export const createDesktopLoginChallenge = () => invoke<DesktopLoginChallenge>("storyteller_create_login_challenge_command");
+export const pollDesktopLoginChallenge = (challengeId: string) => invoke<DesktopLoginOutcome>("storyteller_poll_login_challenge_command", { challengeId });
+export const cancelDesktopLoginChallenge = (challengeId: string) => invoke<void>("storyteller_cancel_login_challenge_command", { challengeId });
+
+export function isDesktopLoginError(error: unknown): error is DesktopLoginError {
+  return typeof error === "object" && error !== null && "message" in error && "retryable" in error;
+}
+
+export const getNativeLoginSession = () => invoke<UserInfo | null>("storyteller_get_login_session_command");
+export const passwordLogin = (usernameOrEmail: string, password: string) => invoke<UserInfo>("storyteller_password_login_command", {
+  request: { username_or_email: usernameOrEmail, password },
+});
+export const passwordSignup = (username: string, email: string, password: string, passwordConfirmation: string) => invoke<UserInfo>("storyteller_password_signup_command", {
+  request: { username, email_address: email, password, password_confirmation: passwordConfirmation, signup_source: "artcraft" },
+});

frontend/libs/components/login-modal/src/lib/login-modal.spec.tsx

@@ -1,12 +1,182 @@
-import { render } from '@testing-library/react';
+import { act, cleanup, fireEvent, render, screen } from "@testing-library/react";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { LoginModal } from "./login-modal";
+import { useLoginModalStore } from "./useLoginModalStore";
 
-import LoginModal from './login-modal';
+const { native, forbiddenFetch } = vi.hoisted(() => ({ native: vi.fn(), forbiddenFetch: vi.fn(() => { throw new Error("Authentication HTTP must run in Rust"); }) }));
+vi.mock("@tauri-apps/api/core", () => ({ invoke: native }));
+vi.mock("@storyteller/api", () => { throw new Error("Authentication UI must not import API clients"); });
+vi.mock("@storyteller/tauri-utils", () => ({ FetchProxy: forbiddenFetch }));
+vi.mock("@headlessui/react", () => ({ Transition: ({ show, children }: any) => show ? children : null, TransitionChild: ({ children }: any) => children }));
+vi.mock("@storyteller/icons", () => ({ DynamicIcon: () => null, DiscordIcon: () => null }));
+vi.mock("@storyteller/ui-button", () => ({ Button: ({ children, variant, icon, iconFlip, ...props }: any) => <button {...props}>{children}</button> }));
+vi.mock("@storyteller/ui-input", () => ({ Input: ({ inputClassName, ...props }: any) => <input {...props} /> }));
+vi.mock("qrcode.react", () => ({ QRCodeSVG: () => <svg role="img" aria-label="Login QR" /> }));
 
-describe('LoginModal', () => {
-  
-  it('should render successfully', () => {
-    const { baseElement } = render(<LoginModal />);
-    expect(baseElement).toBeTruthy();
+const USER = { username: "google_user", user_token: "u_test" };
+
+beforeEach(() => {
+  vi.useFakeTimers();
+  vi.stubGlobal("fetch", forbiddenFetch);
+  forbiddenFetch.mockClear();
+  localStorage.clear();
+  useLoginModalStore.setState({ isOpen: true, recheckTrigger: 0 });
+  native.mockReset().mockImplementation(async (command: string) => {
+    if (command === "storyteller_get_login_session_command") return null;
+    if (command === "storyteller_create_login_challenge_command") return {
+      challenge_id: "native_handle", verification_url: `https://app.getartcraft.com/login/desktop#approval_token=${"A".repeat(43)}`,
+      confirmation_code: "WDJBMJHT", expires_at: new Date(Date.now() + 1_200_000).toISOString(), poll_interval_seconds: 5,
+    };
+    if (command === "storyteller_poll_login_challenge_command") return { status: "redeemed", maybe_user: USER };
+    if (command === "storyteller_password_login_command" || command === "storyteller_password_signup_command") return USER;
+    if (command === "storyteller_cancel_login_challenge_command" || command === "plugin:opener|open_url") return;
+    throw new Error(`Unexpected command: ${command}`);
+  });
+});
+afterEach(() => {
+  cleanup();
+  expect(forbiddenFetch).not.toHaveBeenCalled();
+  expect(localStorage.getItem("artcraft_signed_session")).toBeNull();
+  vi.unstubAllGlobals();
+  vi.useRealTimers();
+});
+
+describe("native login modal integration", () => {
+  it("shows website and QR login only on the login screen", async () => {
+    await act(async () => { render(<LoginModal />); });
+    expect(screen.getByText("Create your account")).toBeTruthy();
+    expect(screen.queryByRole("button", { name: "Login with Website" })).toBeNull();
+    expect(screen.queryByRole("button", { name: "Scan to Login" })).toBeNull();
+    fireEvent.click(screen.getByRole("button", { name: "Log in" }));
+    expect(screen.getByRole("button", { name: "Login with Website" })).toBeTruthy();
+    expect(screen.getByRole("button", { name: "Scan to Login" })).toBeTruthy();
+    fireEvent.click(screen.getByRole("button", { name: "Sign up" }));
+    expect(screen.queryByRole("button", { name: "Login with Website" })).toBeNull();
+  });
+
+  it.each(["Login with Website", "Scan to Login"])("hides password login during %s and restores it with Back", async (label) => {
+    const success = vi.fn();
+    await act(async () => { render(<LoginModal isSignUp={false} onArtCraftAuthSuccess={success} />); });
+    expect(screen.getByPlaceholderText("you@example.com or username")).toBeTruthy();
+    await act(async () => { fireEvent.click(screen.getByRole("button", { name: label })); });
+    expect(screen.getByRole("img", { name: "Login QR" })).toBeTruthy();
+    expect(screen.queryByPlaceholderText("you@example.com or username")).toBeNull();
+    expect(screen.queryByPlaceholderText("Min. 8 characters")).toBeNull();
+    expect(screen.queryByRole("button", { name: "Sign up" })).toBeNull();
+
+    await act(async () => { fireEvent.click(screen.getByRole("button", { name: "Back" })); });
+    expect(screen.getByPlaceholderText("you@example.com or username")).toBeTruthy();
+    expect(screen.getByPlaceholderText("Min. 8 characters")).toBeTruthy();
+    expect(screen.getByRole("button", { name: "Login with Website" })).toBeTruthy();
+    expect(screen.getByRole("button", { name: "Scan to Login" })).toBeTruthy();
+    expect(screen.queryByRole("img", { name: "Login QR" })).toBeNull();
+    expect(native).toHaveBeenCalledWith("storyteller_cancel_login_challenge_command", { challengeId: "native_handle" });
+    await act(async () => { await vi.advanceTimersByTimeAsync(30_000); });
+    expect(native.mock.calls.filter(([command]) => command === "storyteller_poll_login_challenge_command")).toHaveLength(0);
+    expect(success).not.toHaveBeenCalled();
+  });
+
+  it("hides password login while preparing a challenge and cancels a late creation after Back", async () => {
+    let resolve: (value: unknown) => void = () => {};
+    await act(async () => { render(<LoginModal isSignUp={false} />); });
+    native.mockImplementationOnce(() => new Promise((done) => { resolve = done; }));
+    await act(async () => { fireEvent.click(screen.getByRole("button", { name: "Login with Website" })); });
+    expect(screen.getByText("Preparing login…")).toBeTruthy();
+    expect(screen.queryByPlaceholderText("Min. 8 characters")).toBeNull();
+    await act(async () => { fireEvent.click(screen.getByRole("button", { name: "Back" })); });
+    await act(async () => { resolve({ challenge_id: "late_handle" }); });
+    expect(screen.getByPlaceholderText("Min. 8 characters")).toBeTruthy();
+    expect(screen.queryByRole("img", { name: "Login QR" })).toBeNull();
+    expect(native).toHaveBeenCalledWith("storyteller_cancel_login_challenge_command", { challengeId: "late_handle" });
+    expect(native.mock.calls.filter(([command]) => command === "plugin:opener|open_url")).toHaveLength(0);
+  });
+
+  it.each([true, false])("keeps the completed native login when a stale session check resolves (before completion: %s)", async (beforeCompletion) => {
+    let resolveSession: (value: unknown) => void = () => {};
+    native.mockImplementationOnce(() => new Promise((resolve) => { resolveSession = resolve; }));
+    const success = vi.fn();
+    await act(async () => { render(<LoginModal isSignUp={false} onArtCraftAuthSuccess={success} />); });
+    await act(async () => { fireEvent.click(screen.getByRole("button", { name: "Scan to Login" })); });
+    if (beforeCompletion) await act(async () => { resolveSession(null); });
+    expect(screen.getByRole("img", { name: "Login QR" })).toBeTruthy();
+    await act(async () => { await vi.advanceTimersByTimeAsync(5000); });
+    expect(success).toHaveBeenCalledExactlyOnceWith(USER);
+    if (!beforeCompletion) await act(async () => { resolveSession(null); });
+    expect(screen.getByRole("heading", { name: "Logged in as google_user" })).toBeTruthy();
+    expect(screen.queryByRole("img", { name: "Login QR" })).toBeNull();
+    expect(useLoginModalStore.getState().isOpen).toBe(true);
+    await act(async () => { await vi.advanceTimersByTimeAsync(2999); });
+    expect(screen.getByRole("heading", { name: "Logged in as google_user" })).toBeTruthy();
+    await act(async () => { await vi.advanceTimersByTimeAsync(1); });
+    expect(useLoginModalStore.getState().isOpen).toBe(false);
+    expect(screen.queryByRole("heading", { name: "Logged in as google_user" })).toBeNull();
+    expect(screen.queryByText("Create your account")).toBeNull();
+    expect(native).toHaveBeenCalledWith("storyteller_poll_login_challenge_command", { challengeId: "native_handle" });
+  });
+
+  it.each([false, true])("submits password authentication only through Rust (signup: %s)", async (signup) => {
+    const success = vi.fn();
+    await act(async () => { render(<LoginModal isSignUp={signup} onArtCraftAuthSuccess={success} />); });
+    if (signup) {
+      fireEvent.change(screen.getByPlaceholderText("Username"), { target: { value: "native_user" } });
+      fireEvent.change(screen.getByPlaceholderText("you@example.com"), { target: { value: "user@example.com" } });
+      fireEvent.change(screen.getByPlaceholderText("Re-enter password"), { target: { value: "password123" } });
+    } else {
+      fireEvent.change(screen.getByPlaceholderText("you@example.com or username"), { target: { value: "native_user" } });
+    }
+    fireEvent.change(screen.getByPlaceholderText("Min. 8 characters"), { target: { value: "password123" } });
+    const submit = screen.getAllByRole("button", { name: signup ? "Sign up" : "Log in" }).find((button) => button.getAttribute("type") === "submit")!;
+    await act(async () => { fireEvent.click(submit); });
+    expect(success).toHaveBeenCalledExactlyOnceWith(USER);
+    expect(native).toHaveBeenCalledWith(signup ? "storyteller_password_signup_command" : "storyteller_password_login_command", {
+      request: signup ? { username: "native_user", email_address: "user@example.com", password: "password123", password_confirmation: "password123", signup_source: "artcraft" } : { username_or_email: "native_user", password: "password123" },
+    });
+    if (!signup) {
+      expect(screen.getByRole("heading", { name: "Logged in as google_user" })).toBeTruthy();
+      expect(screen.queryByText("Join Our Community")).toBeNull();
+      await act(async () => { await vi.advanceTimersByTimeAsync(3000); });
+      expect(useLoginModalStore.getState().isOpen).toBe(false);
+    }
+  });
+
+  it("dismisses the confirmation once even when callbacks change", async () => {
+    const firstClose = vi.fn();
+    const latestClose = vi.fn();
+    const success = vi.fn();
+    const view = render(<LoginModal isSignUp={false} onClose={firstClose} onArtCraftAuthSuccess={success} />);
+    await act(async () => {});
+    await act(async () => { fireEvent.click(screen.getByRole("button", { name: "Login with Website" })); });
+    await act(async () => { await vi.advanceTimersByTimeAsync(5000); });
+    expect(screen.getByRole("status").textContent).toContain("Logged in as google_user");
+    await act(async () => { await vi.advanceTimersByTimeAsync(1500); });
+    view.rerender(<LoginModal isSignUp={false} onClose={latestClose} onArtCraftAuthSuccess={success} />);
+    await act(async () => { await vi.advanceTimersByTimeAsync(1500); });
+    expect(useLoginModalStore.getState().isOpen).toBe(false);
+    expect(firstClose).not.toHaveBeenCalled();
+    expect(latestClose).toHaveBeenCalledTimes(1);
+    expect(success).toHaveBeenCalledExactlyOnceWith(USER);
+    await act(async () => { await vi.advanceTimersByTimeAsync(10_000); });
+    expect(latestClose).toHaveBeenCalledTimes(1);
+  });
+
+  it("cleans up the confirmation timer on unmount", async () => {
+    const onClose = vi.fn();
+    const view = render(<LoginModal isSignUp={false} onClose={onClose} />);
+    await act(async () => {});
+    await act(async () => { fireEvent.click(screen.getByRole("button", { name: "Scan to Login" })); });
+    await act(async () => { await vi.advanceTimersByTimeAsync(5000); });
+    expect(screen.getByRole("heading", { name: "Logged in as google_user" })).toBeTruthy();
+    view.unmount();
+    await act(async () => { await vi.advanceTimersByTimeAsync(10_000); });
+    expect(onClose).not.toHaveBeenCalled();
+  });
+
+  it("restores an existing session without showing the login confirmation", async () => {
+    native.mockResolvedValueOnce(USER);
+    const success = vi.fn();
+    await act(async () => { render(<LoginModal onArtCraftAuthSuccess={success} />); });
+    expect(success).toHaveBeenCalledExactlyOnceWith(USER);
+    expect(useLoginModalStore.getState().isOpen).toBe(false);
+    expect(screen.queryByRole("heading", { name: "Logged in as google_user" })).toBeNull();
   });
-  
 });

frontend/libs/components/login-modal/src/lib/login-modal.tsx

@@ -1,24 +1,26 @@
 import { Button } from "@storyteller/ui-button";
 import { Transition, TransitionChild } from "@headlessui/react";
-import { useState, useEffect } from "react";
+import { useState, useEffect, useRef } from "react";
 import { ArrowRightIcon } from "lucide-react";
 import { DiscordIcon } from "@storyteller/icons";
+import type { UserInfo } from "@storyteller/api";
+import { DesktopLoginBridge } from "./DesktopLoginBridge";
+import { LoginSuccess } from "./LoginSuccess";
 import { ArtCraftSignUp } from "./artcraft-signup";
-import { UsersApi } from "@storyteller/api";
+import { getNativeLoginSession, passwordLogin, passwordSignup, isDesktopLoginError } from "./NativeLoginBridge";
 import { useLoginModalStore } from "./useLoginModalStore";
 
-const SIGNUP_SOURCE_ARTCRAFT = "artcraft";
-
 // Webapp auth-showcase video (swap by passing `videoUrl`).
 const DEFAULT_SHOWCASE_VIDEO =
-  "https://player.vimeo.com/video/1169289718?background=1&autoplay=1&loop=1&muted=1";
+  "https://frontend-cdn.fakeyou.com/videos/knight-video.mp4";
+const LOGIN_SUCCESS_DURATION_MS = 3000;
 
 interface LoginModalProps {
   onClose?: () => void;
   onOpenChange?: (isOpen: boolean) => void;
   onArtCraftAuthSuccess?: (userInfo: any) => void;
   isSignUp?: boolean;
-  /** Optional override for the right-pane showcase video. */
+  /** Optional direct media URL for the right-pane showcase video. */
   videoUrl?: string;
   // Accepted for backwards compatibility with existing call sites (MainApp
   // passes these); no longer used now that the showcase is a single video.
@@ -40,39 +42,56 @@ export function LoginModal({
   const [errorMessage, setErrorMessage] = useState("");
   const [showDiscord, setShowDiscord] = useState(false);
   const [showSuccess, setShowSuccess] = useState(false);
+  const [isChallengeActive, setIsChallengeActive] = useState(false);
+  const [loggedInUsername, setLoggedInUsername] = useState<string | null>(null);
 
-  const checkArtCraftLogin = async () => {
-    const usersApi = new UsersApi();
-    const session = await usersApi.GetSession();
-    const loggedIn = session.data?.loggedIn;
-    return loggedIn;
-  };
+  const authGeneration = useRef(0);
+  const authSuccess = useRef(onArtCraftAuthSuccess);
+  authSuccess.current = onArtCraftAuthSuccess;
+  const afterClose = useRef(onClose);
+  afterClose.current = onClose;
 
-  // Check session on mount and when recheckTrigger changes.
+  // A stale startup/recheck response must never reopen the modal after login.
   useEffect(() => {
-    checkArtCraftLogin().then((loggedIn) => {
-      if (loggedIn) {
+    const generation = ++authGeneration.current;
+    let active = true;
+    getNativeLoginSession().then((user) => {
+      if (!active || generation !== authGeneration.current) return;
+      if (user) {
         setIsLoggedInArtCraft(true);
+        authSuccess.current?.(user);
         closeModal();
       } else {
-        // Reset modal state to initial values.
         setIsLoading(false);
         setIsSignUp(initialIsSignUp);
         setErrorMessage("");
         setShowDiscord(false);
         setShowSuccess(false);
+        setLoggedInUsername(null);
         setIsLoggedInArtCraft(false);
-
-        const { openModal } = useLoginModalStore.getState();
-        openModal();
+        useLoginModalStore.getState().openModal();
       }
+    }).catch((error) => {
+      if (!active || generation !== authGeneration.current) return;
+      setErrorMessage(isDesktopLoginError(error) ? error.message : "Unable to check your account. Please sign in again.");
+      useLoginModalStore.getState().openModal();
     });
+    return () => { active = false; };
   }, [recheckTrigger, closeModal, initialIsSignUp]);
 
   useEffect(() => {
     if (onOpenChange) onOpenChange(isOpen);
   }, [isOpen, onOpenChange]);
 
+  useEffect(() => {
+    if (loggedInUsername === null || !isOpen) return;
+    const timer = window.setTimeout(() => {
+      closeModal();
+      afterClose.current?.();
+    }, LOGIN_SUCCESS_DURATION_MS);
+    return () => window.clearTimeout(timer);
+  }, [loggedInUsername, isOpen, closeModal]);
+
   const handleClose = () => {
     closeModal();
     onClose?.();
@@ -84,6 +103,15 @@ export function LoginModal({
     setShowSuccess(true);
   };
 
+  const handleLoginSuccess = (user: UserInfo) => {
+    authGeneration.current += 1;
+    setIsLoading(false);
+    setIsLoggedInArtCraft(true);
+    setIsChallengeActive(false);
+    setLoggedInUsername(user.username);
+    authSuccess.current?.(user);
+  };
+
   const handleAuthSubmit = async (
     username: string,
     email: string,
@@ -91,56 +119,24 @@ export function LoginModal({
     passwordConfirmation: string
   ) => {
     setIsLoading(true);
-    const usersApi = new UsersApi();
+    setErrorMessage("");
+    const generation = ++authGeneration.current;
     try {
-      let signupResponse, loginResponse;
+      const user = isSignUp
+        ? await passwordSignup(username, email, password, passwordConfirmation)
+        : await passwordLogin(username || email, password);
+      if (generation !== authGeneration.current) return;
       if (isSignUp) {
-        signupResponse = await usersApi.Signup({
-          username,
-          email,
-          password,
-          passwordConfirmation,
-          signupSource: SIGNUP_SOURCE_ARTCRAFT,
-        });
-
-        if (!signupResponse.success) {
-          setErrorMessage(
-            signupResponse.errorMessage || "Signup failed, please try again."
-          );
-          setIsLoading(false);
-          return;
-        }
-        loginResponse = await usersApi.Login({
-          usernameOrEmail: username || email,
-          password,
-        });
+        setIsLoggedInArtCraft(true);
+        authSuccess.current?.(user);
+        setShowDiscord(true);
       } else {
-        loginResponse = await usersApi.Login({
-          usernameOrEmail: username || email,
-          password,
-        });
+        handleLoginSuccess(user);
       }
-
-      if (!loginResponse.success) {
-        setErrorMessage(
-          loginResponse.errorMessage || "Login failed, please try again."
-        );
-        setIsLoading(false);
-        return;
-      }
-
-      setIsLoggedInArtCraft(true);
-      if (onArtCraftAuthSuccess) {
-        const session = await usersApi.GetSession();
-        const userInfo = session.data?.user;
-        if (userInfo) onArtCraftAuthSuccess(userInfo);
-      }
-      setShowDiscord(true); // Onboarding step after successful auth.
-    } catch (e) {
-      console.error(e);
-      setErrorMessage("An unexpected error occurred. Please try again.");
+    } catch (error) {
+      if (generation === authGeneration.current) setErrorMessage(isDesktopLoginError(error) ? error.message : "An unexpected error occurred. Please try again.");
     } finally {
-      setIsLoading(false);
+      if (generation === authGeneration.current) setIsLoading(false);
     }
   };
 
@@ -204,7 +200,7 @@ export function LoginModal({
   const inOnboarding = showDiscord || showSuccess;
 
   return (
-    <Transition appear show={isOpen}>
+    <Transition appear show={isOpen} afterLeave={() => setLoggedInUsername(null)}>
       <div className="fixed inset-0 z-[100]">
         <TransitionChild
           enter="ease-out duration-300"
@@ -226,10 +222,12 @@ export function LoginModal({
             leaveTo="opacity-0 scale-95"
           >
             <div
-              className="relative flex w-full max-w-5xl overflow-hidden rounded-3xl border border-white/[4%] bg-[#1C1C20] text-white shadow-2xl lg:min-h-[640px]"
+              className={`relative flex w-full overflow-hidden rounded-3xl border bg-[#1C1C20] text-white shadow-2xl ${loggedInUsername !== null ? "max-w-md border-emerald-200/20" : "max-w-5xl border-white/[4%] lg:min-h-[640px]"}`}
               onClick={(e) => e.stopPropagation()}
             >
-              {inOnboarding ? (
+              {loggedInUsername !== null ? (
+                <LoginSuccess username={loggedInUsername} />
+              ) : inOnboarding ? (
                 renderOnboarding()
               ) : (
                 <>
@@ -254,13 +252,14 @@ export function LoginModal({
                           </p>
                         </div>
 
-                        <ArtCraftSignUp
+                        {!isSignUp && <DesktopLoginBridge onActiveChange={setIsChallengeActive} onStart={() => { authGeneration.current += 1; }} onSuccess={handleLoginSuccess} />}
+                        {!isChallengeActive && <ArtCraftSignUp
                           onSubmit={handleAuthSubmit}
                           isSignUp={isSignUp}
                           onToggleMode={() => setIsSignUp((prev) => !prev)}
                           errorMessage={errorMessage}
                           isLoading={isLoading}
-                        />
+                        />}
                       </div>
                     </div>
 
@@ -284,24 +283,19 @@ export function LoginModal({
   );
 }
 
-// Right-pane video showcase — Vimeo background embed scaled to cover the pane,
+// Right-pane video showcase — muted background video cropped to cover the pane,
 // with a legibility gradient + caption. Mirrors the webapp auth-showcase.
 function LoginShowcase({ videoUrl }: { videoUrl: string }) {
   return (
-    <div
-      className="absolute inset-2 overflow-hidden rounded-2xl bg-black"
-      style={{ containerType: "size" }}
-    >
-      <iframe
+    <div className="absolute inset-2 overflow-hidden rounded-2xl bg-black">
+      <video
         src={videoUrl}
-        title="ArtCraft"
-        allow="autoplay; fullscreen; picture-in-picture"
-        allowFullScreen
-        className="pointer-events-none absolute left-1/2 top-1/2 -translate-x-1/2 -translate-y-1/2"
-        style={{
-          width: "max(100cqw, calc(100cqh * 16 / 9))",
-          height: "max(100cqh, calc(100cqw * 9 / 16))",
-        }}
+        autoPlay
+        muted
+        loop
+        playsInline
+        preload="auto"
+        className="pointer-events-none absolute inset-0 h-full w-full object-cover"
       />
 
       <div

frontend/libs/components/login-modal/tsconfig.lib.json

@@ -54,6 +54,9 @@
     },
     {
       "path": "../input/tsconfig.lib.json"
+    },
+    {
+      "path": "../../tauri-api/tsconfig.lib.json"
     }
   ]
 }

frontend/package-lock.json

@@ -49,6 +49,7 @@
         "mediabunny": "^1.29.1",
         "opencut-wasm": "^0.2.10",
         "posthog-js": "^1.141.0",
+        "qrcode.react": "4.2.0",
         "radix-ui": "^1.4.3",
         "react": "18.3.1",
         "react-copy-to-clipboard": "^5.1.0",
@@ -78,6 +79,7 @@
         "@nx/vite": "21.2.3",
         "@nx/web": "21.2.3",
         "@nx/workspace": "21.2.3",
+        "@playwright/test": "1.63.0",
         "@remix-run/node": "^2.16.5",
         "@swc-node/register": "~1.9.1",
         "@swc/core": "~1.5.7",
@@ -5601,6 +5603,22 @@
         "node": ">=14"
       }
     },
+    "node_modules/@playwright/test": {
+      "version": "1.63.0",
+      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.63.0.tgz",
+      "integrity": "sha512-oxMK4vllB9RK5NQ2l1pq1IfOf2AvnEuj/vYGDj0H2nMtmtZpKtCwt/l00GEO6xjGfpBNAvjovvYdCm50dRQkpQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright": "1.63.0"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
     "node_modules/@polka/url": {
       "version": "1.0.0-next.29",
       "resolved": "https://registry.npmjs.org/@polka/url/-/url-1.0.0-next.29.tgz",
@@ -19976,6 +19994,35 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/playwright": {
+      "version": "1.63.0",
+      "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.63.0.tgz",
+      "integrity": "sha512-+7ziBLidS4NaNCdt57SUDT+wYmmd5fmiQejUic/kb+YsYSCPyOOE9sebzMjNmQrsnNpDJqd4WHvV/8lfKfUDUg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright-core": "1.63.0"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/playwright-core": {
+      "version": "1.63.0",
+      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.63.0.tgz",
+      "integrity": "sha512-rYCsBF/M5HjUch52bbtVONEFjv6Xu8sm8h72dNlR5bzIE1fvC/bxgspzkjSfU+MweEMmPM8KJebG6nnyxo5mCg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "playwright-core": "cli.js"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
     "node_modules/portfinder": {
       "version": "1.0.38",
       "resolved": "https://registry.npmjs.org/portfinder/-/portfinder-1.0.38.tgz",
@@ -20479,6 +20526,15 @@
         "node": ">=6"
       }
     },
+    "node_modules/qrcode.react": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/qrcode.react/-/qrcode.react-4.2.0.tgz",
+      "integrity": "sha512-QpgqWi8rD9DsS9EP3z7BT+5lY5SFhsqGjpgW5DY/i3mK4M9DTBNz3ErMi8BWYEfI3L0d8GIbGmcdFAS1uIRGjA==",
+      "license": "ISC",
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/qs": {
       "version": "6.15.2",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.15.2.tgz",

frontend/package.json

@@ -2,7 +2,10 @@
   "name": "@frontend/source",
   "version": "0.0.0",
   "license": "MIT",
-  "scripts": {},
+  "scripts": {
+    "test:desktop-session": "node tools/testing/desktop-session.mjs",
+    "perf:desktop": "node tools/performance/run.mjs"
+  },
   "private": true,
   "dependencies": {
     "@dnd-kit/core": "^6.3.1",
@@ -38,6 +41,7 @@
     "mediabunny": "^1.29.1",
     "opencut-wasm": "^0.2.10",
     "posthog-js": "^1.141.0",
+    "qrcode.react": "4.2.0",
     "radix-ui": "^1.4.3",
     "react": "18.3.1",
     "react-copy-to-clipboard": "^5.1.0",
@@ -67,6 +71,7 @@
     "@nx/vite": "21.2.3",
     "@nx/web": "21.2.3",
     "@nx/workspace": "21.2.3",
+    "@playwright/test": "1.63.0",
     "@remix-run/node": "^2.16.5",
     "@swc-node/register": "~1.9.1",
     "@swc/core": "~1.5.7",

frontend/scripts/unix-dev.mjs

@@ -0,0 +1,149 @@
+// Invoked by script/artcraft/unix_dev.sh. Adapted from ArtcraftX's launcher.
+// Living under frontend lets Node resolve the local Vite installation.
+import { spawn } from "node:child_process";
+import { readFile } from "node:fs/promises";
+import path from "node:path";
+import { setTimeout as delay } from "node:timers/promises";
+import { fileURLToPath } from "node:url";
+import { createServer } from "vite";
+
+const rootDir = fileURLToPath(new URL("../../", import.meta.url));
+const frontendDir = path.join(rootDir, "frontend");
+const appDir = path.join(frontendDir, "apps/artcraft");
+const rustDir = path.join(rootDir, "crates/desktop/artcraft");
+const host = "127.0.0.1";
+const startingPort = Number(process.env.ARTCRAFT_DEV_PORT ?? "5193");
+
+let vite;
+let rust;
+let stopping = false;
+
+async function main() {
+  if (!Number.isInteger(startingPort) || startingPort < 1024 || startingPort > 65535) {
+    throw new Error("ARTCRAFT_DEV_PORT must be an integer between 1024 and 65535.");
+  }
+
+  process.env.VITE_ENVIRONMENT_TYPE ??= "production";
+  // Match the app build's cwd, including Tailwind config/content resolution.
+  process.chdir(appDir);
+  vite = await createServer({
+    configFile: path.join(appDir, "vite.config.ts"),
+    clearScreen: false,
+    server: {
+      host,
+      port: startingPort,
+      // Vite retries occupied ports while binding the real server. There is no
+      // port probe/release/rebind race, and no existing process is terminated.
+      strictPort: false,
+      open: false,
+      hmr: true,
+    },
+  });
+  if (stopping) return;
+  await vite.listen();
+  const { port } = vite.httpServer.address();
+  const devUrl = `http://${host}:${port}`;
+
+  // Only initial startup may choose another port. On a Vite config restart,
+  // rebind this port or fail visibly so Tauri never follows a silent port hop.
+  for (const options of [vite.config.server, vite.config.inlineConfig.server]) {
+    options.port = port;
+    options.strictPort = true;
+  }
+
+  const configPath = path.join(rustDir, "tauri-dev-hot-reload.conf.json");
+  const config = JSON.parse(await readFile(configPath, "utf8"));
+  if (stopping) return;
+  const csp = config.app.security.csp;
+  const overrides = {
+    build: { devUrl, beforeDevCommand: "" },
+    app: {
+      security: {
+        devCsp: {
+          ...csp,
+          "connect-src": [...csp["connect-src"], devUrl, `ws://${host}:${port}`],
+        },
+      },
+    },
+  };
+
+  console.log(`\n[artcraft] Frontend + HMR: ${devUrl}`);
+  console.log("[artcraft] Rust/Tauri: native IPC; automatic rebuild and app restart enabled.");
+  console.log("[artcraft] Press Ctrl-C to stop both.\n");
+
+  rust = spawn("cargo", [
+    "tauri", "dev",
+    "--no-dev-server",
+    // Tauri watches the desktop crate and its workspace dependencies itself.
+    // SQLx's external metadata and migrations also affect the Rust build.
+    "--additional-watch-folders", path.join(rootDir, ".sqlx"),
+    "--additional-watch-folders", path.join(rootDir, "_database/sql/artcraft_migrations"),
+    "--config", configPath,
+    "--config", JSON.stringify(overrides),
+  ], {
+    cwd: rootDir,
+    // All cargo/rustc/app descendants inherit this private Unix process group.
+    detached: true,
+    stdio: ["ignore", "inherit", "inherit"],
+    env: {
+      ...process.env,
+      TAURI_FRONTEND_PATH: frontendDir,
+      TAURI_APP_PATH: rustDir,
+      SQLX_OFFLINE: process.env.SQLX_OFFLINE ?? "true",
+      RUSTFLAGS: process.env.RUSTFLAGS ?? "-Awarnings",
+      WEBKIT_DISABLE_DMABUF_RENDERER: process.env.WEBKIT_DISABLE_DMABUF_RENDERER ?? "1",
+      WEBKIT_DISABLE_COMPOSITING_MODE: process.env.WEBKIT_DISABLE_COMPOSITING_MODE ?? "1",
+    },
+  });
+  rust.on("error", fail);
+  rust.on("exit", (code, signal) => {
+    if (!stopping) {
+      console.log(`[artcraft] Rust/Tauri exited (${signal ?? code}).`);
+      void stop(code ?? 1);
+    }
+  });
+}
+
+async function stop(exitCode) {
+  if (stopping) return;
+  stopping = true;
+  console.log("\n[artcraft] Stopping frontend and Rust/Tauri...");
+
+  const deadline = setTimeout(() => {
+    signalRustGroup("SIGKILL");
+    process.exit(exitCode);
+  }, 5000);
+  signalRustGroup("SIGTERM");
+  await Promise.allSettled([
+    vite?.close(),
+    (async () => {
+      while (signalRustGroup(0)) await delay(50);
+    })(),
+  ]);
+  clearTimeout(deadline);
+  process.exit(exitCode);
+}
+
+function signalRustGroup(signal) {
+  if (!rust?.pid) return false;
+  try {
+    process.kill(-rust.pid, signal);
+    return true;
+  } catch (error) {
+    if (error.code !== "ESRCH") throw error;
+    return false;
+  }
+}
+
+function fail(error) {
+  console.error(`[artcraft] ${error.stack ?? error}`);
+  void stop(1);
+}
+
+process.on("SIGINT", () => void stop(130));
+process.on("SIGTERM", () => void stop(143));
+process.on("SIGHUP", () => void stop(129));
+process.on("uncaughtException", fail);
+process.on("unhandledRejection", fail);
+
+main().catch(fail);

frontend/scripts/unix-dev.test.mjs

@@ -0,0 +1,188 @@
+// Integration tests: real Vite sockets + a fake cargo process tree, no GUI/build.
+// Run: node --test frontend/scripts/unix-dev.test.mjs
+import assert from "node:assert/strict";
+import { spawn } from "node:child_process";
+import { once } from "node:events";
+import { mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
+import { createServer } from "node:net";
+import os from "node:os";
+import path from "node:path";
+import { setTimeout as delay } from "node:timers/promises";
+import { test } from "node:test";
+import WebSocket from "ws";
+import { fileURLToPath } from "node:url";
+
+const rootDir = fileURLToPath(new URL("../../", import.meta.url));
+const launcher = path.join(rootDir, "script/artcraft/unix_dev.sh");
+
+test("skips occupied ports, pairs Tauri with real Vite/HMR, and cleans up on Ctrl-C", { timeout: 40000 }, async (t) => {
+  const occupied = await occupyPort(t);
+  const startingPort = occupied.address().port;
+  const run = await fixture(t, { ARTCRAFT_DEV_PORT: String(startingPort) });
+  const record = await run.record();
+  const config = overrides(record);
+  const url = config.build.devUrl;
+  assert.ok(Number(new URL(url).port) > startingPort);
+  assert.equal(new URL(url).hostname, "127.0.0.1");
+  assert.equal(config.build.beforeDevCommand, "");
+  assert.ok(!record.args.includes("--no-watch"));
+  assert.ok(!record.args.includes("--no-dev-server-wait"));
+  assert.equal(record.env.TAURI_APP_PATH, path.join(rootDir, "crates/desktop/artcraft"));
+  assert.equal(record.env.TAURI_FRONTEND_PATH, path.join(rootDir, "frontend"));
+  assert.ok(config.app.security.devCsp["connect-src"].includes(url.replace("http:", "ws:")));
+  assert.match(await (await fetch(url)).text(), /\/src\/index\.tsx/);
+  assert.match(await (await fetch(`${url}/@vite/client`)).text(), /WebSocket/);
+
+  run.proc.kill("SIGINT");
+  assert.deepEqual(await run.exited, [130, null], run.output());
+  await until(() => !alive(record.pid) && !alive(record.childPid));
+  await assert.rejects(fetch(url));
+  assert.equal(occupied.listening, true, "must not terminate the existing listener");
+});
+
+test("Tauri failure propagates and stops Vite and leftover descendants", { timeout: 40000 }, async (t) => {
+  const run = await fixture(t, { TEST_EXIT_CODE: "17" });
+  const record = await run.record();
+  assert.deepEqual(await run.exited, [17, null], run.output());
+  await until(() => !alive(record.childPid));
+  await assert.rejects(fetch(overrides(record).build.devUrl));
+});
+
+test("SIGTERM shuts down the complete process tree", { timeout: 40000 }, async (t) => {
+  const run = await fixture(t);
+  const record = await run.record();
+  run.proc.kill("SIGTERM");
+  assert.deepEqual(await run.exited, [143, null], run.output());
+  await until(() => !alive(record.pid) && !alive(record.childPid));
+  await assert.rejects(fetch(overrides(record).build.devUrl));
+});
+
+test("invalid ports fail before starting Tauri", { timeout: 40000 }, async (t) => {
+  const run = await fixture(t, { ARTCRAFT_DEV_PORT: "65536" });
+  assert.deepEqual(await run.exited, [1, null]);
+  assert.match(run.output(), /ARTCRAFT_DEV_PORT must be an integer/);
+});
+
+test("concurrent launchers use different ports without replacing either frontend", { timeout: 40000 }, async (t) => {
+  const occupied = await occupyPort(t);
+  const env = { ARTCRAFT_DEV_PORT: String(occupied.address().port) };
+  const first = await fixture(t, env);
+  const second = await fixture(t, env);
+  const [a, b] = await Promise.all([first.record(), second.record()]);
+  const firstUrl = overrides(a).build.devUrl;
+  const secondUrl = overrides(b).build.devUrl;
+  assert.notEqual(firstUrl, secondUrl);
+  assert.equal((await fetch(firstUrl)).status, 200);
+  assert.equal((await fetch(secondUrl)).status, 200);
+  first.proc.kill("SIGINT");
+  await first.exited;
+  assert.equal((await fetch(secondUrl)).status, 200);
+  assert.ok(alive(b.pid));
+});
+
+test("a React source edit sends HMR on the selected port without restarting Rust", { timeout: 40000 }, async (t) => {
+  const run = await fixture(t);
+  const record = await run.record();
+  const url = overrides(record).build.devUrl;
+  const probeDir = await mkdtemp(path.join(rootDir, "frontend/apps/artcraft/app/src/dev-probe-"));
+  t.after(() => rm(probeDir, { recursive: true, force: true }));
+  const probe = path.join(probeDir, "Probe.tsx");
+  const moduleUrl = `/src/${path.basename(probeDir)}/Probe.tsx`;
+  await writeFile(probe, "export default function Probe() { return <div>before</div>; }\n");
+  const code = await (await fetch(`${url}${moduleUrl}`)).text();
+  assert.match(code, /\$RefreshReg\$/);
+
+  const client = await (await fetch(`${url}/@vite/client`)).text();
+  const token = client.match(/const wsToken = "([^"]+)"/)[1];
+  const ws = new WebSocket(`${url.replace("http:", "ws:")}/?token=${token}`, "vite-hmr");
+  t.after(() => ws.terminate());
+  const messages = [];
+  ws.on("message", (data) => messages.push(JSON.parse(data.toString())));
+  await once(ws, "open");
+  await writeFile(probe, "export default function Probe() { return <div>after</div>; }\n");
+  await until(() => messages.some((m) => m.type === "update" && m.updates.some((u) => u.path === moduleUrl)));
+  assert.match(await (await fetch(`${url}${moduleUrl}`)).text(), /after/);
+  assert.ok(alive(record.pid), "JS edits must leave the Rust watcher running");
+  assert.equal((await run.record()).pid, record.pid);
+});
+
+test("Rust watcher arguments include SQLx inputs and preserve caller overrides", { timeout: 40000 }, async (t) => {
+  const run = await fixture(t, { SQLX_OFFLINE: "false", RUSTFLAGS: "-C debuginfo=1" });
+  const record = await run.record();
+  assert.equal(record.env.SQLX_OFFLINE, "false");
+  assert.equal(record.env.RUSTFLAGS, "-C debuginfo=1");
+  assert.ok(record.args.includes(path.join(rootDir, ".sqlx")));
+  assert.ok(record.args.includes(path.join(rootDir, "_database/sql/artcraft_migrations")));
+  const ignores = await readFile(path.join(rootDir, "crates/desktop/artcraft/.taurignore"), "utf8");
+  assert.doesNotMatch(ignores, /^(crates\/|Cargo\.toml|Cargo\.lock)$/m);
+});
+
+async function until(check) {
+  for (let attempt = 0; attempt < 200; attempt++) {
+    const result = await check();
+    if (result) return result;
+    await delay(50);
+  }
+  throw new Error("Timed out waiting for dev launcher");
+}
+
+async function fixture(t, env = {}) {
+  const dir = await mkdtemp(path.join(os.tmpdir(), "artcraft-dev-test-"));
+  t.after(() => rm(dir, { recursive: true, force: true }));
+  await writeFile(path.join(dir, "cargo"), `#!/usr/bin/env node
+const fs = require("node:fs");
+const { spawn } = require("node:child_process");
+if (process.argv.includes("--version")) process.exit(0);
+const child = spawn(process.execPath, ["-e", "setInterval(() => {}, 1000)"], { stdio: "ignore" });
+fs.writeFileSync(process.env.TEST_RECORD, JSON.stringify({
+  args: process.argv.slice(2), cwd: process.cwd(),
+  env: Object.fromEntries(["TAURI_APP_PATH", "TAURI_FRONTEND_PATH", "SQLX_OFFLINE", "RUSTFLAGS"].map(key => [key, process.env[key]])),
+  pid: process.pid, childPid: child.pid,
+}));
+if (process.env.TEST_EXIT_CODE) setTimeout(() => process.exit(Number(process.env.TEST_EXIT_CODE)), 200);
+setInterval(() => {}, 1000);
+`, { mode: 0o755 });
+
+  const recordFile = path.join(dir, "record.json");
+  const proc = spawn(launcher, [], {
+    // Prove the launcher is independent of the invoking working directory.
+    cwd: dir,
+    env: { ...process.env, ...env, PATH: `${dir}:${process.env.PATH}`, TEST_RECORD: recordFile },
+    stdio: ["ignore", "pipe", "pipe"],
+  });
+  let output = "";
+  proc.stdout.on("data", (chunk) => { output += chunk; });
+  proc.stderr.on("data", (chunk) => { output += chunk; });
+  const exited = once(proc, "exit");
+  t.after(async () => {
+    if (proc.exitCode === null && proc.signalCode === null) proc.kill("SIGTERM");
+    await exited;
+  });
+  return {
+    proc, exited, output: () => output,
+    async record() {
+      return until(async () => {
+        if (proc.exitCode !== null) throw new Error(output);
+        try { return JSON.parse(await readFile(recordFile, "utf8")); }
+        catch (error) { if (error.code !== "ENOENT") throw error; }
+      });
+    },
+  };
+}
+
+async function occupyPort(t) {
+  const server = createServer();
+  server.listen(0, "127.0.0.1");
+  await once(server, "listening");
+  t.after(() => new Promise((resolve) => server.close(resolve)));
+  return server;
+}
+
+function alive(pid) {
+  try { process.kill(pid, 0); return true; }
+  catch (error) { if (error.code === "ESRCH") return false; throw error; }
+}
+
+function overrides(record) {
+  return JSON.parse(record.args.at(-1));
+}

frontend/tools/performance/benchmark-plugin.mjs

@@ -0,0 +1,54 @@
+import { execFileSync } from "node:child_process";
+import { relative } from "node:path";
+
+// Benchmark-only instrumentation. The normal desktop build never uses this plugin.
+export function benchmarkPlugin({ baselineRef, frontend } = {}) {
+  // Reproduce this experiment without checking out over local work. This is a
+  // two-module overlay, not a build of an entire historical repository.
+  const baseline = new Map();
+  if (baselineRef) {
+    for (const path of ["pages/MainApp.tsx", "pages/Stores/TabState.ts"]) {
+      baseline.set(`/apps/artcraft/app/src/${path}`, execFileSync("git", ["show", `${baselineRef}:frontend/apps/artcraft/app/src/${path}`], { cwd: frontend, encoding: "utf8" }));
+    }
+  }
+  const exports = new Map([
+    ["/pages/Stores/TabState.ts", ["tabs", "useTabStore"]],
+    ["/pagedraw/src/lib/stores/SceneState.ts", ["scene", "useSceneStore"]],
+    ["/pagedraw/src/lib/Node.ts", ["Node", "Node"]],
+  ]);
+  return {
+    name: "artcraft-performance-fixtures",
+    enforce: "pre",
+    transform(code, id) {
+      const source = [...baseline].find(([suffix]) => id.endsWith(suffix));
+      if (source) code = source[1];
+      for (const [suffix, [key, value]] of exports) {
+        if (id.endsWith(suffix)) {
+          return `${code}\nwindow.__ARTCRAFT_BENCH__ ??= {};\nwindow.__ARTCRAFT_BENCH__.${key} = ${value};\n`;
+        }
+      }
+      if (source) return code;
+    },
+    generateBundle: {
+      order: "post",
+      handler(_options, bundle) {
+        const chunks = Object.values(bundle).filter((item) => item.type === "chunk");
+        this.emitFile({
+          type: "asset",
+          fileName: "performance-bundle.json",
+          source: JSON.stringify(chunks.map((chunk) => ({
+            file: chunk.fileName,
+            entry: chunk.isEntry,
+            dynamicEntry: chunk.isDynamicEntry,
+            bytes: Buffer.byteLength(chunk.code),
+            imports: chunk.imports,
+            largestModules: Object.entries(chunk.modules)
+              .sort((a, b) => b[1].renderedLength - a[1].renderedLength)
+              .slice(0, 25)
+              .map(([id, module]) => ({ module: relative(frontend, id), renderedBytes: module.renderedLength })),
+          })), null, 2),
+        });
+      },
+    },
+  };
+}

frontend/tools/performance/browser-fixture.mjs

@@ -0,0 +1,103 @@
+// Runs before any application script. No real account, Rust IPC, or remote API.
+export function installBrowserFixture() {
+  const counters = { commands: {}, fileReads: 0, webglContexts: 0, longTasks: [] };
+  window.__ARTCRAFT_COUNTERS__ = counters;
+  const getContext = HTMLCanvasElement.prototype.getContext;
+  HTMLCanvasElement.prototype.getContext = function (type, ...args) {
+    if (type === "webgl" || type === "webgl2" || type === "experimental-webgl") counters.webglContexts++;
+    return getContext.call(this, type, ...args);
+  };
+  const readAsDataURL = FileReader.prototype.readAsDataURL;
+  FileReader.prototype.readAsDataURL = function (...args) {
+    counters.fileReads++;
+    return readAsDataURL.apply(this, args);
+  };
+  if (PerformanceObserver.supportedEntryTypes.includes("longtask")) {
+    new PerformanceObserver((list) => {
+      counters.longTasks.push(...list.getEntries().map(({ startTime, duration }) => ({ startTime, duration })));
+    }).observe({ type: "longtask", buffered: true });
+  }
+  let callbackId = 0;
+  const callbacks = new Map();
+  window.__TAURI_INTERNALS__ = {
+    metadata: { currentWindow: { label: "main" }, currentWebview: { label: "main" } },
+    transformCallback(callback) { callbacks.set(++callbackId, callback); return callbackId; },
+    unregisterCallback(id) { callbacks.delete(id); },
+    convertFileSrc(path) { return path; },
+    async invoke(command, args) {
+      counters.commands[command] = (counters.commands[command] ?? 0) + 1;
+      if (command === "plugin:event|listen") return args.handler;
+      if (command === "plugin:window|inner_size") return { width: 1440, height: 1000 };
+      if (command === "plugin:window|scale_factor") return 1;
+      if (command === "storyteller_get_login_session_command") return {
+        username: "performance_fixture", user_token: "u_performance_fixture",
+      };
+      if (command === "get_task_queue_command") return { payload: { tasks: [] } };
+      // Use the bundled model overlay, as the app does when the listing is unavailable.
+      if (command === "list_image_models_command" || command === "list_video_models_command") throw new Error("Offline model listing fixture");
+      if (command === "plugin:app|version") return "0.0.0-benchmark";
+      if (command === "plugin:app|name") return "ArtCraft Benchmark";
+      if (command === "plugin:os|platform") return "macos";
+      if (command.startsWith("plugin:http|")) throw new Error("Network disabled in performance fixture");
+      return { success: true, payload: {} };
+    },
+  };
+  window.__TAURI_EVENT_PLUGIN_INTERNALS__ = { unregisterListener() {} };
+}
+
+export async function seedDrawingScene() {
+  const { scene, Node } = window.__ARTCRAFT_BENCH__;
+  scene.getState().RESET();
+  scene.getState().setBaseImageInfo({ url: "", mediaToken: "fixture-blank", isBlankCanvas: true, blankCanvasWidth: 1024, blankCanvasHeight: 1024 });
+  // Deterministic noisy pixels resist PNG compression, like imported artwork.
+  const canvas = document.createElement("canvas");
+  canvas.width = canvas.height = 1024;
+  const context = canvas.getContext("2d");
+  const pixels = context.createImageData(1024, 1024);
+  let random = 12345;
+  for (let i = 0; i < pixels.data.length; i += 4) {
+    random = (Math.imul(random, 1664525) + 1013904223) >>> 0;
+    pixels.data[i] = random & 255;
+    pixels.data[i + 1] = (random >>> 8) & 255;
+    pixels.data[i + 2] = (random >>> 16) & 255;
+    pixels.data[i + 3] = 255;
+  }
+  context.putImageData(pixels, 0, 0);
+  const blob = await new Promise((resolve) => canvas.toBlob(resolve));
+  const drawNodes = [];
+  for (let i = 0; i < 4; i++) {
+    const node = new Node({ id: `fixture-image-${i}`, type: "image", x: i * 220, y: i * 100, width: 400, height: 400, fill: "transparent" });
+    await node.setImageFromFile(new File([blob], `fixture-${i}.png`, { type: "image/png" }));
+    drawNodes.push(node);
+  }
+  for (let i = 0; i < 80; i++) {
+    drawNodes.push({
+      id: `fixture-line-${i}`, type: "line", draggable: true, stroke: "#7766ee", strokeWidth: 3,
+      points: Array.from({ length: 200 }, (_, j) => j % 2 === 0 ? j * 4 : i * 10 + Math.sin(j) * 30),
+    });
+  }
+  scene.setState({ drawNodes, selectedNodeIds: [drawNodes[0].id] });
+  scene.getState().saveState();
+  return { images: 4, imageSize: 1024, imageBytesEach: blob.size, strokes: 80, coordinatesPerStroke: 200 };
+}
+
+export async function measureTabChange(target) {
+  const counters = window.__ARTCRAFT_COUNTERS__;
+  const readsBefore = counters.fileReads;
+  const start = performance.now();
+  const success = await window.__ARTCRAFT_BENCH__.tabs.getState().setActiveTab(target);
+  if (!success) throw new Error(`Tab change to ${target} failed`);
+  const stateReadyMs = performance.now() - start;
+  const ready = () => target === "2D"
+    ? !!document.querySelector(".konvajs-content canvas")
+    : !!Array.from(document.querySelectorAll("h1")).find((h) => h.textContent.includes("craft"));
+  while (!ready()) {
+    if (performance.now() - start > 15000) throw new Error(`Tab ${target} never rendered`);
+    await new Promise(requestAnimationFrame);
+  }
+  // A rendering opportunity after the target DOM committed, not GPU completion.
+  await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
+  const paintMs = performance.now() - start;
+  performance.measure(`artcraft:tab:${target}`, { start, end: performance.now() });
+  return { stateReadyMs, paintMs, fileReads: counters.fileReads - readsBefore };
+}

frontend/tools/performance/compare.mjs

@@ -0,0 +1,33 @@
+import { readFile } from "node:fs/promises";
+
+const [beforePath, afterPath] = process.argv.slice(2);
+if (!beforePath || !afterPath) throw new Error("Usage: node tools/performance/compare.mjs before.json after.json");
+const before = JSON.parse(await readFile(beforePath, "utf8"));
+const after = JSON.parse(await readFile(afterPath, "utf8"));
+for (const field of ["platform", "arch", "cpu", "browser", "viewport", "ipc", "network", "runs"]) {
+  if (before.environment[field] !== after.environment[field]) throw new Error(`Different ${field}; do not compare these runs`);
+}
+if (before.errors.length || after.errors.length) throw new Error("A run contains browser errors");
+if (JSON.stringify(before.samples[0].fixture) !== JSON.stringify(after.samples[0].fixture)) throw new Error("Different scene fixtures");
+
+const rows = [["Measurement", "Before", "After", "Reduction"]];
+for (const [label, event, metric, unit, scale] of [
+  ["Startup to frame", "startup", "readyMs", "ms", 1],
+  ["Refresh to frame", "refresh", "readyMs", "ms", 1],
+  ["Startup JavaScript", "startup", "jsBytes", "MB", 1e6],
+  ["Startup long tasks (sum)", "startup", "longTaskMs", "ms", 1],
+  ["First drawing page to frame", "firstDraw", "paintMs", "ms", 1],
+  ["Drawing to home: dispatch", "leaveDraw", "stateReadyMs", "ms", 1],
+  ["Drawing to home: frame", "leaveDraw", "paintMs", "ms", 1],
+  ["Home to drawing: dispatch", "returnDraw", "stateReadyMs", "ms", 1],
+  ["Home to drawing: frame", "returnDraw", "paintMs", "ms", 1],
+]) {
+  const a = before.summary[event][metric].median;
+  const b = after.summary[event][metric].median;
+  rows.push([label, `${(a / scale).toFixed(2)} ${unit}`, `${(b / scale).toFixed(2)} ${unit}`, `${((a - b) / a * 100).toFixed(1)}%`]);
+}
+const widths = rows[0].map((_, col) => Math.max(...rows.map((row) => row[col].length)));
+const format = (row) => `| ${row.map((cell, col) => cell.padEnd(widths[col])).join(" | ")} |`;
+console.log(format(rows[0]));
+console.log(`|-${widths.map((w) => "-".repeat(w)).join("-|-")}-|`);
+for (const row of rows.slice(1)) console.log(format(row));

frontend/tools/performance/run.mjs

@@ -0,0 +1,125 @@
+import { build, preview } from "vite";
+import { chromium } from "@playwright/test";
+import { readFile, writeFile, mkdir } from "node:fs/promises";
+import { resolve, dirname } from "node:path";
+import { fileURLToPath } from "node:url";
+import os from "node:os";
+import { execFileSync } from "node:child_process";
+import { parseArgs } from "node:util";
+import { benchmarkPlugin } from "./benchmark-plugin.mjs";
+import { installBrowserFixture, seedDrawingScene, measureTabChange } from "./browser-fixture.mjs";
+
+const frontend = resolve(dirname(fileURLToPath(import.meta.url)), "../..");
+const { values } = parseArgs({ options: {
+  output: { type: "string", default: process.env.ARTCRAFT_PERF_DIR || "/tmp/artcraft-performance" },
+  runs: { type: "string", default: process.env.ARTCRAFT_PERF_RUNS || "7" },
+  "skip-build": { type: "boolean", default: !!process.env.ARTCRAFT_PERF_SKIP_BUILD },
+  "build-only": { type: "boolean", default: false },
+  channel: { type: "string", default: "chrome" },
+  "baseline-ref": { type: "string" },
+  "smoke-imports": { type: "boolean", default: false },
+} });
+const output = resolve(values.output);
+const runs = Number(values.runs);
+if (!Number.isInteger(runs) || runs < 1) throw new Error("--runs must be a positive integer");
+const configFile = resolve(frontend, "apps/artcraft/vite.config.ts");
+// Match `npm run build` in the app: Tailwind resolves its config/content from cwd.
+process.chdir(dirname(configFile));
+await mkdir(output, { recursive: true });
+if (!values["skip-build"]) {
+  await build({ configFile, plugins: [benchmarkPlugin({ baselineRef: values["baseline-ref"], frontend })], build: { outDir: resolve(output, "dist"), manifest: true } });
+  await writeFile(resolve(output, "build-info.json"), JSON.stringify({
+    builtAt: new Date().toISOString(),
+    revision: execFileSync("git", ["rev-parse", "HEAD"], { cwd: frontend, encoding: "utf8" }).trim(),
+    baselineOverlay: values["baseline-ref"] || null,
+    changedFiles: execFileSync("git", ["diff", "--name-only"], { cwd: frontend, encoding: "utf8" }).trim().split("\n"),
+  }, null, 2));
+}
+if (values["build-only"]) process.exit(0);
+const server = await preview({ configFile, build: { outDir: resolve(output, "dist") }, preview: { host: "127.0.0.1", port: 0, strictPort: false } });
+let browser;
+try {
+  browser = await chromium.launch({ channel: values.channel, headless: true });
+  const url = server.resolvedUrls.local[0];
+  const samples = [];
+  const errors = [];
+  const importedPages = [];
+  for (let run = 0; run < runs; run++) {
+    const context = await browser.newContext({ viewport: { width: 1440, height: 1000 }, deviceScaleFactor: 1 });
+    await context.addInitScript(installBrowserFixture);
+    const page = await context.newPage();
+    page.on("pageerror", (error) => { errors.push(error.message); console.error("Browser error:", error.message); });
+    // No analytics, external media, or authenticated API traffic in this fixture.
+    await context.route("**/*", (route) => route.request().url().startsWith(url) || route.request().url().startsWith("blob:")
+      ? route.continue() : route.abort());
+    const cdp = await context.newCDPSession(page);
+    await cdp.send("Network.enable");
+    await cdp.send("Network.setCacheDisabled", { cacheDisabled: true });
+    await page.goto(url, { waitUntil: "domcontentloaded" });
+    await page.getByRole("heading", { name: "What will you craft today?" }).waitFor();
+    await page.waitForFunction(() => !document.querySelector("video"));
+    if (!await page.evaluate(() => getComputedStyle(document.querySelector(".fixed")).position === "fixed")) {
+      throw new Error("Tailwind styles are missing; benchmark layout is invalid");
+    }
+    const collectStartup = async () => page.evaluate(async () => {
+      await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
+      return {
+        readyMs: performance.now(),
+        jsBytes: performance.getEntriesByType("resource").filter((r) => r.name.endsWith(".js")).reduce((sum, r) => sum + r.decodedBodySize, 0),
+        longTaskMs: window.__ARTCRAFT_COUNTERS__.longTasks.reduce((sum, t) => sum + t.duration, 0),
+        webglContexts: window.__ARTCRAFT_COUNTERS__.webglContexts,
+      };
+    });
+    const startup = await collectStartup();
+    await page.reload({ waitUntil: "domcontentloaded" });
+    await page.getByRole("heading", { name: "What will you craft today?" }).waitFor();
+    await page.waitForFunction(() => !document.querySelector("video"));
+    const refresh = await collectStartup();
+    const fixture = await page.evaluate(seedDrawingScene);
+    const firstDraw = await page.evaluate(measureTabChange, "2D");
+    // Allow image decoding and the canvas bake debounce to settle outside timing.
+    await page.waitForTimeout(1000);
+    const leaveDraw = await page.evaluate(measureTabChange, "APPS");
+    const returnDraw = await page.evaluate(measureTabChange, "2D");
+    await page.waitForTimeout(1000);
+    const afterReturn = await page.evaluate(() => ({
+      nodeCount: window.__ARTCRAFT_BENCH__.scene.getState().drawNodes.length,
+      selectedCount: window.__ARTCRAFT_BENCH__.scene.getState().selectedNodeIds.length,
+      historyLength: window.__ARTCRAFT_BENCH__.scene.getState().history.length,
+      commands: window.__ARTCRAFT_COUNTERS__.commands,
+    }));
+    if (run === 0) await page.screenshot({ path: resolve(output, "drawing.png") });
+    samples.push({ startup, refresh, firstDraw, leaveDraw, returnDraw, fixture, afterReturn });
+    console.log(JSON.stringify({ run: run + 1, startup, refresh, firstDraw, leaveDraw, returnDraw }));
+    // Validate deferred module evaluation separately from all timed operations.
+    if (values["smoke-imports"] && run === runs - 1) {
+      const manifest = JSON.parse(await readFile(resolve(output, "dist/.vite/manifest.json"), "utf8"));
+      for (const [source, chunk] of Object.entries(manifest)) {
+        if (source.startsWith("src/pages/") && chunk.isDynamicEntry) {
+          await page.evaluate(async (file) => { await import(/* @vite-ignore */ `/${file}`); }, chunk.file);
+          importedPages.push(source);
+        }
+      }
+    }
+    await context.close();
+  }
+  const summary = {};
+  for (const event of ["startup", "refresh", "firstDraw", "leaveDraw", "returnDraw"]) {
+    summary[event] = {};
+    for (const metric of Object.keys(samples[0][event])) {
+      const values = samples.map((s) => s[event][metric]).sort((a, b) => a - b);
+      summary[event][metric] = { median: values[Math.floor(values.length / 2)], min: values[0], max: values.at(-1) };
+    }
+  }
+  const result = {
+    timestamp: new Date().toISOString(), build: JSON.parse(await readFile(resolve(output, "build-info.json"), "utf8")),
+    environment: { platform: os.platform(), arch: os.arch(), cpu: os.cpus()[0].model, browser: browser.version(), node: process.version, runs, viewport: "1440x1000@1", ipc: "mocked", network: "local assets only, browser cache disabled" },
+    summary, samples, importedPages, errors: [...new Set(errors)],
+  };
+  await writeFile(resolve(output, "results.json"), `${JSON.stringify(result, null, 2)}\n`);
+  console.log(JSON.stringify({ summary, errors: result.errors, output }, null, 2));
+  if (errors.length) throw new Error("Browser errors invalidate this run; see results.json");
+} finally {
+  await browser?.close();
+  await new Promise((resolve, reject) => server.httpServer.close((error) => error ? reject(error) : resolve()));
+}

frontend/tools/testing/desktop-session.mjs

@@ -0,0 +1,118 @@
+// Real app UI with isolated, deterministic IPC responses. Run against a dev or
+// preview URL. Native HTTP/CORS correctness is tested separately in Rust and in
+// the real-webview procedure in docs/desktop-session-regression.md.
+import assert from "node:assert/strict";
+import { chromium, expect } from "@playwright/test";
+import { installBrowserFixture } from "../performance/browser-fixture.mjs";
+
+const url = new URL(process.argv[2] || "http://127.0.0.1:5193");
+if (!["127.0.0.1", "localhost", "[::1]"].includes(url.hostname)) {
+  throw new Error("Use the local development or preview URL printed by the launcher.");
+}
+const browser = await chromium.launch({ channel: "chrome", headless: true });
+try {
+  const context = await browser.newContext({ viewport: { width: 1440, height: 1000 } });
+  await context.addInitScript(installBrowserFixture);
+  await context.addInitScript(installSessionFixture);
+  await context.route("**/*", (route) => {
+    const target = route.request().url();
+    return target.startsWith(url.origin) || target.startsWith("blob:")
+      ? route.continue() : route.abort();
+  });
+  const page = await context.newPage();
+  const errors = [];
+  page.on("pageerror", (error) => errors.push(error.message));
+  const home = async () => {
+    await page.goto(url.href);
+    await expect(page.getByRole("heading", { name: "What will you craft today?" })).toBeVisible({ timeout: 60000 });
+    await expect(page.getByRole("button", { name: "42 Credits" })).toBeVisible();
+  };
+  const account = async () => {
+    await page.getByRole("button", { name: "Settings", exact: true }).click();
+    await page.getByRole("button", { name: "Accounts", exact: true }).click();
+    await expect(page.getByText("Session Smoke Account", { exact: true })).toBeVisible();
+    await expect(page.getByRole("button", { name: "Log Out", exact: true })).toBeVisible();
+  };
+
+  await home();
+  await account();
+  await page.keyboard.press("Escape");
+  await page.getByRole("button", { name: "My Library" }).click();
+  await expect(page.getByRole("img", { name: "Session smoke image", exact: true })).toBeVisible();
+  await expect.poll(() => page.getByRole("img", { name: "Session smoke image", exact: true })
+    .evaluate((image) => image.complete && image.naturalWidth > 0)).toBe(true);
+  await expect(page.getByText("Log in to browse and use your library.")).toHaveCount(0);
+  await page.keyboard.press("Escape");
+  await page.getByRole("button", { name: "Create Image Generate AI images" }).click();
+  await expect(page.getByRole("img", { name: "Session smoke image", exact: true })).toBeVisible();
+  await account();
+  await page.keyboard.press("Escape");
+  for (const [card, heading] of [
+    ["Create Video Create video from images", "Create Video"],
+    ["Create Audio Generate music and sound effects", "Create Audio"],
+  ]) {
+    await home();
+    await page.getByRole("button", { name: card }).click();
+    await expect(page.getByRole("heading", { name: heading, exact: true }).first()).toBeVisible();
+  }
+  await account();
+  await page.getByRole("button", { name: "Log Out", exact: true }).click();
+  await expect(page.getByRole("heading", { name: "Create your account" })).toBeVisible();
+  await page.getByRole("button", { name: "Log in", exact: true }).click();
+  await page.getByPlaceholder("you@example.com or username").fill("session_smoke");
+  await page.getByPlaceholder("Min. 8 characters").fill("fixture-password-only");
+  await page.getByRole("button", { name: "Log in", exact: true }).click();
+  await expect(page.getByRole("heading", { name: "Welcome back" })).toHaveCount(0, { timeout: 10000 });
+  await account();
+  assert.deepEqual(errors, [], "Application runtime errors");
+  console.log("PASS: credits, Accounts, Library media, deferred image/video/audio pages, logout gate, and sign-in agree.");
+} finally {
+  await browser.close();
+}
+
+function installSessionFixture() {
+  const invoke = window.__TAURI_INTERNALS__.invoke;
+  let loggedIn = true;
+  let nextResource = 0;
+  const responses = new Map();
+  const user = {
+    username: "session_smoke", display_name: "Session Smoke Account",
+    user_token: "u_session_smoke", can_access_studio: true, maybe_feature_flags: [],
+  };
+  const image = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAusB9Wl6mTQAAAAASUVORK5CYII=";
+  const media = {
+    token: "m_session_smoke", media_class: "image", media_type: "png",
+    maybe_title: "Session smoke image", created_at: new Date().toISOString(),
+    origin_category: "inference", origin: { origin_category: "inference" },
+    media_links: { cdn_url: image, maybe_thumbnail_template: image, thumbnail_template: image },
+    stats: { positive_rating_count: 0, bookmark_count: 0 },
+  };
+  window.__TAURI_INTERNALS__.invoke = async (command, args) => {
+    if (command === "storyteller_get_login_session_command") return loggedIn ? user : null;
+    if (command === "storyteller_password_login_command") { loggedIn = true; return user; }
+    if (command === "storyteller_purge_credentials_command") { loggedIn = false; return; }
+    if (command === "get_app_info_command") return { payload: { storyteller_host: "https://api.storyteller.ai" } };
+    if (command === "storyteller_get_credits_command") return { payload: { free_credits: 0, monthly_credits: 42, banked_credits: 0, sum_total_credits: 42 } };
+    if (command === "plugin:http|fetch") {
+      const request = new URL(args.clientConfig.url);
+      let body = { success: true, results: [], folders: [], tags: [], active_subscriptions: [] };
+      if (request.pathname === "/v1/session") body = { success: true, logged_in: loggedIn, user: loggedIn ? user : undefined };
+      if (request.pathname === "/v1/logout") loggedIn = false;
+      if (request.pathname === "/v1/media_files/list/user/session_smoke") body = { success: true, results: [media], pagination: { has_next: false } };
+      responses.set(++nextResource, { url: request.href, body });
+      return nextResource;
+    }
+    if (command === "plugin:http|fetch_send") {
+      const response = responses.get(args.rid);
+      return { rid: args.rid, status: 200, statusText: "OK", url: response.url, headers: [["content-type", "application/json"]] };
+    }
+    if (command === "plugin:http|fetch_read_body") {
+      const response = responses.get(args.rid);
+      args.streamChannel.onmessage([...new TextEncoder().encode(JSON.stringify(response.body)), 0]);
+      args.streamChannel.onmessage([1]);
+      responses.delete(args.rid);
+      return;
+    }
+    return invoke(command, args);
+  };
+}

script/artcraft/unix_dev.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+# Start the desktop frontend and Rust/Tauri watcher together on macOS or Linux.
+set -euo pipefail
+
+root_dir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/../.." && pwd)"
+frontend_path="${root_dir}/frontend"
+
+if [[ "${1:-}" == "--help" || "${1:-}" == "-h" ]]; then
+  cat <<'HELP'
+Usage: ./script/artcraft/unix_dev.sh
+
+Starts Vite with React/CSS hot reload and Tauri with Rust rebuild/restart.
+Finds and binds a free loopback port starting at ARTCRAFT_DEV_PORT (default: 5193),
+then passes that exact URL to Tauri. HMR shares the frontend port.
+Rust uses native Tauri IPC and does not need a second HTTP port.
+Ctrl-C stops this launcher's frontend, Rust watcher, and desktop app.
+
+Requires Node.js 20+, npm, Rust, cargo-tauri 2, and Tauri platform prerequisites.
+Installs frontend dependencies only when the local Vite installation is missing.
+Run this command instead of running the two legacy dev scripts together.
+HELP
+  exit 0
+fi
+
+if [[ $# -ne 0 ]]; then
+  echo "Unknown argument: $1 (see --help)" >&2
+  exit 1
+fi
+
+source "${root_dir}/script/common/frontend_preflight.sh"
+frontend_preflight "${frontend_path}"
+
+if ! command -v cargo >/dev/null || ! cargo tauri --version >/dev/null 2>&1; then
+  echo 'ERROR: Install Rust and the Tauri CLI: cargo install tauri-cli --version "^2" --locked' >&2
+  exit 1
+fi
+
+cd "${frontend_path}"
+if [[ ! -f node_modules/vite/package.json ]]; then
+  # Do not use the legacy install helper: its failure recovery deletes caches.
+  npm install
+fi
+
+exec node "${frontend_path}/scripts/unix-dev.mjs"