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/pages/client/SpecVersions.tsx

@@ -22,7 +22,8 @@ export function SpecVersions({ baseUrl, children }: { baseUrl: string; children:
             <Dialog>
               <Box direction="Column" gap="400" style={{ padding: config.space.S400 }}>
                 <Text>
-                  Unable to connect to the homeserver. The homeserver or your internet connection may be down.
+                  Unable to connect to the homeserver. The homeserver or your internet connection
+                  may be down.
                 </Text>
                 <Button variant="Critical" onClick={retry}>
                   <Text as="span" size="B400">