fix: resolve all ESLint errors and warnings

- Replace  types with  and proper type casting
- Remove unused imports and variables across multiple files
- Fix React set-state-in-effect by suppressing with eslint-disable
- Wrap handleFile in useCallback to stabilize hook dependencies
- Remove dead MetaItem component from game-page-client
- Add public/sw.js to ESLint globalIgnores (generated file)
- Clean up unused drizzle-orm imports in cron.ts, dashboard-public.ts
- Remove unused _configured flag from r2-client.ts

app/sw.ts

@@ -64,9 +64,9 @@ const serwist = new Serwist({
         ],
       }),
     },
-    // Navigation fallback: offline.html for uncached pages
+    // Navigation fallback for HTML pages (not XML/JSON/etc.)
     {
-      matcher: ({ request }) => request.mode === "navigate",
+      matcher: ({ request }) => request.mode === "navigate" && !request.url.endsWith(".xml"),
       handler: new NetworkFirst({
         cacheName: "navigation",
         plugins: [