Port upstream UI polish and refresh dependencies

Bring over selected Warp UI improvements: selectable Thought text, message
timestamps, animated theme backgrounds, editable New Window shortcuts,
safer tab renaming and restoration, and text/font/discard crash fixes.

Match upstream orchestration pill geometry and tooltips, and replace expanded
subagent previews with compact links that retain live status and conversation
navigation for launches and follow-up messages.

Include the pending Cargo.lock dependency refresh.

Adapted upstream PRs: #15948, #15884, #15691, #14618, #15772, #15705,
#15605, #14895, #15996, #15771, #14893, and #14603.

app/src/code_review/code_review_view.rs

@@ -7655,15 +7655,17 @@ impl TypedActionView for CodeReviewView {
                             ctx,
                         );
                     }
-                } else {
-                    let file_path = self.discard_dialog_state.discard_file_paths[0].clone();
-                    if let Some(standardized_path) = self.to_standardized_path(&file_path) {
-                        self.discard_file(
-                            standardized_path,
-                            self.discard_dialog_state.stash_changes_enabled,
-                            ctx,
-                        );
-                    }
+                } else if let Some(standardized_path) = self
+                    .discard_dialog_state
+                    .discard_file_paths
+                    .first()
+                    .and_then(|file_path| self.to_standardized_path(file_path))
+                {
+                    self.discard_file(
+                        standardized_path,
+                        self.discard_dialog_state.stash_changes_enabled,
+                        ctx,
+                    );
                 }
                 self.discard_dialog_state.show_discard_confirm_dialog = false;
                 self.discard_dialog_state.discard_file_paths.clear();

app/src/code_review/code_review_view_tests.rs

@@ -852,6 +852,24 @@ fn test_setup_dropdown_without_branches_only_has_uncommitted_changes() {
     });
 }
 
+#[test]
+fn test_duplicate_single_file_discard_confirmation_is_ignored() {
+    App::test((), |mut app| async move {
+        let ctx = TestContext::new(&mut app, "test.txt", "line 1\nline 2\nline 3");
+
+        ctx.code_review_view.update(&mut app, |view, view_ctx| {
+            view.discard_dialog_state.operation_type = DiscardOperationType::FileUncommittedChanges;
+            view.discard_dialog_state.show_discard_confirm_dialog = false;
+            view.discard_dialog_state.discard_file_paths.clear();
+
+            view.handle_action(&CodeReviewAction::ConfirmDiscardFile, view_ctx);
+
+            assert!(!view.discard_dialog_state.show_discard_confirm_dialog);
+            assert!(view.discard_dialog_state.discard_file_paths.is_empty());
+        });
+    });
+}
+
 #[test]
 fn test_on_close_then_on_open_reinitializes_repo_state() {
     App::test((), |mut app| async move {