chore: prettier format all files, brotli, Sentry release tagging, CI gates

Prettier: auto-formatted 103 files to fix baseline. Prettier check in CI
  is now a hard gate (removed continue-on-error).

Brotli: installed libnginx-mod-http-brotli-filter/static. Enabled in nginx
  with brotli_static on for pre-compressed assets and comp_level 6.

Sentry releases: deploy script now exports VITE_APP_VERSION=<git-short-sha>
  before building so each Sentry release maps to an exact commit.
  CI also passes github.sha as VITE_APP_VERSION.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/features/room/RoomView.tsx

@@ -56,8 +56,6 @@ const shouldFocusMessageField = (evt: KeyboardEvent): boolean => {
   return true;
 };
 
-
-
 export function RoomView({ eventId }: { eventId?: string }) {
   const roomInputRef = useRef<HTMLDivElement>(null);
   const roomViewRef = useRef<HTMLDivElement>(null);
@@ -98,8 +96,9 @@ export function RoomView({ eventId }: { eventId?: string }) {
     )
   );
 
-    const chatBgStyle = useMemo(
-    () => getChatBg(lotusTerminal && chatBackground === 'none' ? 'tactical' : chatBackground, isDark),
+  const chatBgStyle = useMemo(
+    () =>
+      getChatBg(lotusTerminal && chatBackground === 'none' ? 'tactical' : chatBackground, isDark),
     [chatBackground, lotusTerminal, isDark]
   );