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/hooks/usePan.ts

@@ -55,11 +55,14 @@ export const usePan = (active: boolean) => {
   }, [active]);
 
   // Clean up document listeners if component unmounts during an active drag
-  useEffect(() => () => {
-    document.removeEventListener('mousemove', handleMouseMove);
-    document.removeEventListener('mouseup', handleMouseUp);
-  // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, []);
+  useEffect(
+    () => () => {
+      document.removeEventListener('mousemove', handleMouseMove);
+      document.removeEventListener('mouseup', handleMouseUp);
+      // eslint-disable-next-line react-hooks/exhaustive-deps
+    },
+    []
+  );
 
   return {
     pan,