add /clear endpoint for data cleanup

index.js

@@ -71,7 +71,7 @@ app.use(cors({
     }
     return callback(new Error('Not allowed by CORS'));
   },
-  methods: ['GET', 'POST'],
+  methods: ['GET', 'POST', 'DELETE'],
   allowedHeaders: ['Content-Type', 'Authorization']
 }));
 
@@ -221,6 +221,18 @@ app.get('/stats', requireAuth, (req, res) => {
   }
 });
 
+// Delete all submissions (protected)
+app.delete('/clear', requireAuth, (req, res) => {
+  try {
+    db.run('DELETE FROM submissions');
+    saveDb();
+    res.json({ success: true, message: 'All submissions deleted' });
+  } catch (error) {
+    console.error('Clear error:', error);
+    res.status(500).json({ error: 'Internal server error' });
+  }
+});
+
 // Start server after DB init
 initDb().then(() => {
   app.listen(PORT, () => {