fix(app): Add main logic for queue

app.py

@@ -56,6 +56,39 @@ def ai_request():
     except Exception as e:
         return jsonify({"error": str(e)}), 500
 
+@app.route("/AI/<string:id>", methods=["GET"])
+def req_status(id):
+    try:
+        with sqlite3.connect(DB_PATH) as conn:
+            row = conn.execute(
+                "SELECT status, result FROM requests WHERE id = ?", (id,)
+            ).fetchone()
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+    if row is None:
+        return jsonify({"error": f"task {id} not found"}), 404
+
+    status, result = row
+
+    if status not in ("OK", "ОК"):
+        return jsonify({"id": id, "status": status}), 200
+
+    if not result:
+        return jsonify({"error": f"task {id} is OK but has no result file"}), 500
+
+    path = Path(result)
+    if not path.is_absolute():
+        path = RESULT_DIR / path
+
+    if not path.is_file():
+        return jsonify({"error": f"result file not found: {path}"}), 404
+
+    try:
+        return send_file(path, as_attachment=True, download_name=path.name)
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
 @app.route('/health', methods=['GET'])
 def health_check():
     """Проверка работоспособности API"""