feat: 添加 H5 登录调试面板，显示初始 URL 信息并修复布尔值渲染问题

frontend/index.html

@@ -9,6 +9,7 @@
     </head>
 
     <body>
+      <script>window.__INITIAL_URL__ = document.URL;</script>
       <div id="root"></div>
       <script type="module" src="/src/main.tsx"></script>
     </body>

frontend/src/app/pages/LoginPage.tsx

@@ -33,6 +33,7 @@ const INIT_DEBUG: DebugInfo = {
 };
 
 function DebugPanel({ info }: { info: DebugInfo }) {
+  const [initialUrl] = useState(() => (window as any).__INITIAL_URL__ || '(N/A)');
   return (
     <div className="absolute top-0 left-0 right-0 z-50 bg-black/80 text-white text-xs font-mono p-3 text-left max-h-[60vh] overflow-auto">
       <div className="font-bold text-yellow-400 mb-1">🐞 调试信息 (关闭需去掉 ?debug=1)</div>
@@ -41,9 +42,13 @@ function DebugPanel({ info }: { info: DebugInfo }) {
           {Object.entries(info).map(([k, v]) => (
             <tr key={k} className="border-b border-white/10">
               <td className="pr-2 text-gray-400 w-28 align-top whitespace-nowrap">{k}</td>
-              <td className="break-all text-green-300">{v || <span className="text-gray-500">(空)</span>}</td>
+              <td className="break-all text-green-300">{v === false ? 'false' : v === true ? 'true' : v || <span className="text-gray-500">(空)</span>}</td>
             </tr>
           ))}
+          <tr className="border-b border-yellow-400/50">
+            <td className="pr-2 text-yellow-400 w-28 align-top whitespace-nowrap font-bold">initialUrl</td>
+            <td className="break-all text-yellow-300">{initialUrl}</td>
+          </tr>
         </tbody>
       </table>
     </div>