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>

scripts/patch-folds.mjs

@@ -7,11 +7,11 @@ const foldsPath = join(__dirname, '../node_modules/folds/dist/index.js');
 
 try {
   let content = readFileSync(foldsPath, 'utf8');
-  
+
   // Defensive guard: if src is not a function, render null instead of crashing
   const original = 'children: src(filled)';
   const patched = 'children: typeof src === "function" ? src(filled) : null';
-  
+
   if (content.includes(patched)) {
     console.log('folds patch already applied.');
   } else if (content.includes(original)) {