perf: optimize polling, stats cache, and frontend chunk splitting

app-frontend/vite.config.js

@@ -8,6 +8,19 @@ export default defineConfig({
     outDir: '../static/app',
     emptyOutDir: true,
     manifest: true,
+    cssCodeSplit: true,
+    chunkSizeWarningLimit: 800,
+    rollupOptions: {
+      output: {
+        manualChunks(id) {
+          if (!id.includes('node_modules')) return
+          if (id.includes('/vue/') || id.includes('/vue-router/') || id.includes('/pinia/')) return 'vendor-vue'
+          if (id.includes('/element-plus/') || id.includes('/@element-plus/')) return 'vendor-element'
+          if (id.includes('/socket.io-client/')) return 'vendor-socket'
+          if (id.includes('/axios/')) return 'vendor-axios'
+          return 'vendor'
+        },
+      },
+    },
   },
 })
-