fix: harden auth flows and align api contracts

frontend/admin/vite.config.js

@@ -9,8 +9,25 @@ const apiProxyTarget = process.env.VITE_API_PROXY_TARGET || 'http://127.0.0.1:80
 export default defineConfig({
   plugins: [react()],
   build: {
+    chunkSizeWarningLimit: 600,
     rollupOptions: {
       input: 'index.html',
+      output: {
+        manualChunks(id) {
+          if (id.includes('node_modules')) {
+            if (id.includes('react-router-dom') || id.includes('/react/') || id.includes('/react-dom/')) {
+              return 'react-vendor'
+            }
+            if (id.includes('/antd/') || id.includes('@ant-design/icons')) {
+              return 'antd-vendor'
+            }
+            if (id.includes('/dayjs/')) {
+              return 'dayjs-vendor'
+            }
+          }
+          return undefined
+        },
+      },
     },
   },
   resolve: {