The Ease Presets panel (#254) is modelled on a third-party panel, so,
as with third-party tools in After Effects, it isn't core any more: it
is `extensions/scriptui-panels/Ease Presets.jsx`, a ScriptUI panel
bundled as an optional extension (Window ▸ Ease Presets.jsx), written
only against the public scripting API. Clicking a preset eases every
pair of neighbouring selected keyframes in one undo step (per
dimension, along the motion path for spatial properties, the keys'
other sides as they play); the fields edit the working curve, which the
panel draws; From Keys, Save, Rename and Delete as before. The twelve
built-in curves are unchanged.
Scripting API fixes it needed (After Effects parity):
- `app.settings` lasts between runs (`script_settings.json` in the
settings folder; `script.settings.get` / `script.settings.save`).
- Per-key methods (`setTemporalEaseAtKey`, `setInterpolationTypeAtKey`,
`removeKey`, the continuous / auto-Bezier / roving setters) no longer
change the user's key selection (they selected the key they edited).
- `keyInTemporalEase` / `keyOutTemporalEase` report linear and
auto-Bezier sides as they play, `keyIn/OutSpatialTangent` the
tangents the motion path plays.
- `selectedProperties` includes the properties of selected keyframes.
- `isInterpolationTypeValid` is false for Linear / Bezier on values that
only hold.
Removed from core: Window ▸ Ease Presets, the `keys.easePreset.*`
commands, `engine::ease_presets` and the `ease_presets.json` store,
`keyframe::EaseCurve` (nothing else used it) and the egui panel. User
presets saved by the v0.6.0 panel move into the panel's app.settings
section the first time settings load (the old file is left as is).
Docs: plugins.md (bundled extensions), parity.md, gaps.md G8, agents.md.
Test: app_settings_last_between_runs,
per_key_methods_keep_the_key_selection_and_report_eases_as_they_play,
spatial_tangents_are_reported_as_the_path_plays (each fails before),
the_ease_presets_panel_eases_every_selected_pair_in_one_undo_step,
a_typed_curve_scales_to_each_dimension_and_follows_motion_paths,
user_presets_save_rename_delete_and_persist,
presets_saved_by_the_old_core_panel_carry_over (script, through the
panel's controls), ease_presets_panel_eases_the_selected_keys_from_its_list
(UI: the panel docks and a click on a preset eases the keys).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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