feat: 增强维护模式和审计页面功能，优化构建流程

frontend/src/pages/maintenance.astro

@@ -62,7 +62,12 @@ const errorMessage =
             )}
           </div>
 
-          <form method="post" action="/api/maintenance/unlock" class="space-y-4">
+          <form
+            method="post"
+            action="/api/maintenance/unlock"
+            class="space-y-4"
+            data-maintenance-unlock-form
+          >
             <input type="hidden" name="returnTo" value={returnTo} />
 
             <label class="block">
@@ -95,5 +100,52 @@ const errorMessage =
         </div>
       </section>
     </main>
+
+    <script>
+      const maintenanceForm = document.querySelector('[data-maintenance-unlock-form]');
+
+      if (maintenanceForm instanceof HTMLFormElement) {
+        maintenanceForm.addEventListener('submit', async (event) => {
+          event.preventDefault();
+
+          const submitButton = maintenanceForm.querySelector('button[type="submit"]');
+          if (submitButton instanceof HTMLButtonElement) {
+            submitButton.disabled = true;
+          }
+
+          try {
+            const formData = new FormData(maintenanceForm);
+            const response = await fetch(maintenanceForm.action, {
+              method: 'POST',
+              headers: {
+                'Content-Type': 'application/json',
+              },
+              credentials: 'same-origin',
+              body: JSON.stringify({
+                code: String(formData.get('code') || ''),
+                returnTo: String(formData.get('returnTo') || '/'),
+              }),
+            });
+
+            window.location.assign(response.url);
+          } catch (error) {
+            console.error('Failed to submit maintenance unlock form:', error);
+            const currentUrl = new URL(window.location.href);
+            const nextUrl = new URL('/maintenance', currentUrl.origin);
+            const returnToValue = new FormData(maintenanceForm).get('returnTo');
+            nextUrl.searchParams.set(
+              'returnTo',
+              String(returnToValue || currentUrl.searchParams.get('returnTo') || '/'),
+            );
+            nextUrl.searchParams.set('error', 'unavailable');
+            window.location.assign(nextUrl.toString());
+          } finally {
+            if (submitButton instanceof HTMLButtonElement) {
+              submitButton.disabled = false;
+            }
+          }
+        });
+      }
+    </script>
   </body>
 </html>