修复问题2

server.js

@@ -803,6 +803,22 @@ app.post('/api/stop-transcode', (req, res) => {
     }
 });
 
+app.get('/api/progress', (req, res) => {
+    try {
+        const key = typeof req.query.key === 'string' ? req.query.key.trim() : '';
+        if (!key) {
+            return res.status(400).json({ error: 'Video key is required' });
+        }
+
+        const progressKey = getProgressKey(key);
+        const progress = progressMap[progressKey] || null;
+        res.json({ progress });
+    } catch (error) {
+        console.error('Error fetching progress:', error);
+        res.status(500).json({ error: 'Failed to fetch progress', detail: error.message });
+    }
+});
+
 app.get('/api/stream', async (req, res) => {
     const bucket = req.query.bucket;
     const key = req.query.key;