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/components/LogoutDialog.tsx

@@ -43,7 +43,9 @@ export const LogoutDialog = forwardRef<HTMLDivElement, LogoutDialogProps>(
           size="500"
         >
           <Box grow="Yes">
-            <Text as="h2" size="H4">Logout</Text>
+            <Text as="h2" size="H4">
+              Logout
+            </Text>
           </Box>
         </Header>
         <Box style={{ padding: config.space.S400 }} direction="Column" gap="400">