EPS import: joined text lays out its bounds afresh

The pieces joined into one text kept the layout cached for the first piece, so the selection box covered only that piece.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

crates/eps/src/import/native.rs

@@ -798,6 +798,9 @@ fn join_pieces(parts: &mut Vec<Arc<Node>>, lines: &[(String, Point)]) {
             && let NodeKind::Text(t) = &mut node.kind
         {
             t.runs = runs.into_iter().flatten().collect();
+            // The layout cached for the first piece is not this text's.
+            t.cached_bounds = None;
+            t.cached_baselines.clear();
         }
         let mut gone: Vec<usize> = rest.clone();
         gone.sort_unstable_by(|a, b| b.cmp(a));

crates/eps/src/import/tests_native.rs

@@ -423,6 +423,9 @@ fn a_line_the_page_draws_in_pieces_goes_to_its_text_object_whole() {
     let texts: Vec<String> =
         group.children().unwrap().iter().filter_map(|n| if let NodeKind::Text(t) = &n.kind { Some(t.plain_text()) } else { None }).collect();
     assert_eq!(texts, ["Hi there"]);
+    // Its bounds are laid out afresh for the whole text, not those of the first piece.
+    let NodeKind::Text(t) = &group.children().unwrap()[0].kind else { panic!("text") };
+    assert!(t.cached_bounds.is_none() && t.cached_baselines.is_empty());
 }
 
 #[test]