style: apply prettier across fork files

check:prettier was not part of my gate routine, so formatting drift accumulated
across the session's touched files (and a few older ones). Run prettier --write
to bring the repo back to 'All matched files use Prettier code style!'.
Formatting only — no logic changes. tsc/tests/build all green.

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

src/app/utils/notifications.test.ts

@@ -126,7 +126,9 @@ test('marked-unread + already fully read: clears the flag even though no receipt
   await markAsRead(mx, '!r:server', false);
   assert.equal(calls.length, 0); // no receipt (the stuck-dot case)
   // ...but the marked-unread flag is cleared directly (both keys, unread:false)
-  assert.ok(accountDataWrites.some((w) => w.type === 'm.marked_unread' && w.content.unread === false));
+  assert.ok(
+    accountDataWrites.some((w) => w.type === 'm.marked_unread' && w.content.unread === false),
+  );
 });
 
 test('not marked-unread: markAsRead does not touch account data', async () => {