Fix: normalize Surreal query response

lib/db.js

@@ -32,10 +32,24 @@ class Database {
     }
   }
 
+  _normalizeQueryResult(raw) {
+    if (!Array.isArray(raw)) return [[]];
+
+    return raw.map((entry) => {
+      if (Array.isArray(entry)) return entry;
+      if (entry && typeof entry === 'object' && 'result' in entry) {
+        return Array.isArray(entry.result) ? entry.result : [entry.result];
+      }
+      return [];
+    });
+  }
+
   async query(sql, vars = {}) {
     if (!this.connected) return [[]];
+
     try {
-      return await this.client.query(sql, vars);
+      const raw = await this.client.query(sql, vars);
+      return this._normalizeQueryResult(raw);
     } catch (e) {
       console.error('[DB] Query error:', e.message);
       return [[]];