fix(desktop): address code-review findings on the desktop wave

- fileEntries: a single unreadable file/dir in a dropped folder no longer aborts
  the whole traversal (try/catch per entry, skip failures) — was discarding ALL
  dropped files (incl. the flat-file path) + an unhandled rejection; also add
  .catch in both useFileDrop consumers.
- RoomInput: mirror a localStorage-restored draft into the draft atom so the
  P5-57 indicator reflects a persisted draft after a page reload, not only on
  same-session room re-entry.
- useTauriThumbbar: swallow toggleMicrophone()/hangup() rejections (parity with
  SMTC) — avoids an unhandled rejection when clicked mid-teardown.
- App/DesktopChrome: keep wrapper element types stable across the chrome toggle
  (display:contents when off) so flipping it no longer remounts RouterProvider.
- settings: normalizeComposerToolbarOrder also appends missing keys from the
  canonical key set (safety net if a new button is absent from the default order).

Gates: tsc/eslint/prettier clean, build OK, 559 tests.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/features/room/RoomInput.tsx

@@ -369,13 +369,17 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
             const nodes = JSON.parse(stored);
             if (Array.isArray(nodes) && nodes.length > 0) {
               Transforms.insertFragment(editor, nodes);
+              // Mirror the restored draft into the atom so the draft indicator
+              // (reads roomIdToMsgDraftAtomFamily) reflects a persisted draft
+              // after a page reload — not only on same-session room re-entry.
+              setMsgDraft(nodes);
             }
           }
         } catch {
           // Ignore malformed stored draft
         }
       }
-    }, [editor, msgDraft, roomId]);
+    }, [editor, msgDraft, roomId, setMsgDraft]);
 
     useEffect(
       () => () => {