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backend/routes/messages.js

@@ -5,15 +5,23 @@ const db = require('../db');
 // GET /api/messages?userId=123
 router.get('/', async (req, res) => {
   const userId = req.query.userId;
-  if (!userId) return res.status(400).json({ error: 'userId required' });
   try {
-    const result = await db.getQuery()(
-      `SELECT id, user_id, sender_type, content, channel, role, direction, created_at, attachment_filename, attachment_mimetype, attachment_size, attachment_data, metadata
-       FROM messages
-       WHERE user_id = $1
-       ORDER BY created_at ASC`,
-      [userId]
-    );
+    let result;
+    if (userId) {
+      result = await db.getQuery()(
+        `SELECT id, user_id, sender_type, content, channel, role, direction, created_at, attachment_filename, attachment_mimetype, attachment_size, attachment_data, metadata
+         FROM messages
+         WHERE user_id = $1
+         ORDER BY created_at ASC`,
+        [userId]
+      );
+    } else {
+      result = await db.getQuery()(
+        `SELECT id, user_id, sender_type, content, channel, role, direction, created_at, attachment_filename, attachment_mimetype, attachment_size, attachment_data, metadata
+         FROM messages
+         ORDER BY created_at ASC`
+      );
+    }
     res.json(result.rows);
   } catch (e) {
     res.status(500).json({ error: 'DB error', details: e.message });