feat(app): 移除内置agents并添加CORS支持和技能上传优化

移除了agents/registry.json中的所有内置agents配置，将agents数组清空。
为web应用添加了CORS中间件支持，允许指定的前端地址跨域访问。
重构了技能上传功能，增加了LLM重写机制，自动规范化上传的技能格式。
新增了工具名称提取逻辑，从技能正文中自动识别Required Tools段落。
更新了技能学习候选者和草稿的载荷结构，添加评估报告统计信息。
修改了意图路由技能的说明，改进任务状态管理逻辑。

app-instance/backend/tests/unit/test_task_mode_feedback.py

@@ -218,6 +218,45 @@ def test_unrelated_new_task_auto_accepts_previous_task(tmp_path: Path) -> None:
     assert current.run_ids == [second.run_id]
 
 
+def test_standalone_realtime_repeat_creates_new_task_in_same_session(tmp_path: Path) -> None:
+    service = AgentService(
+        loader=EngineLoader(
+            workspace=tmp_path,
+            task_execution_planner=StubTaskExecutionPlanner(),
+        )
+    )
+    session_id = "feishu:group-weather"
+    first = asyncio.run(
+        service.process_direct(
+            "珠海天气怎样",
+            session_id=session_id,
+            provider_bundle=_bundle("Weather result"),
+        )
+    )
+
+    second = asyncio.run(
+        service.process_direct(
+            "珠海天气怎么样",
+            session_id=session_id,
+            provider_bundle=_bundle("Fresh weather result", route_action="continue_task"),
+        )
+    )
+
+    task_service = service.create_loop().boot().task_service
+    assert task_service is not None
+    previous = task_service.get_task(first.task_id or "")
+    current = task_service.get_task(second.task_id or "")
+    assert previous is not None
+    assert current is not None
+    assert previous.session_id == session_id
+    assert current.session_id == session_id
+    assert current.task_id != previous.task_id
+    assert previous.status == "closed"
+    assert previous.run_ids == [first.run_id]
+    assert current.status == "awaiting_acceptance"
+    assert current.run_ids == [second.run_id]
+
+
 def test_related_follow_up_continues_active_task_without_accepting_it(tmp_path: Path) -> None:
     service = AgentService(
         loader=EngineLoader(