feat(userbot,api,frontend): file links, media downloads, story hold-pause, drop scheduled dupes

frontend/vite.config.ts

@@ -21,6 +21,7 @@ export default defineConfig({
     proxy: {
       "/api": { target: proxyTarget, changeOrigin: true },
       "/mcp": { target: proxyTarget, changeOrigin: true },
+      "/f": { target: proxyTarget, changeOrigin: true },
     },
   },
 });