feat: 添加MinIO文件系统支持并优化外部连接器功能

- 添加MinIO用户文件系统配置选项(BEAVER_MINIO_ROOT_USER等)
- 更新外部连接器配置结构，包括BASE_URL和认证令牌设置
- 改进connector provider支持更多类型(official, feishu_bot等)
- 实现Mistral模型推理模式支持reasoning_effort参数
- 增强外部连接器策略配置和运行时配置管理
- 添加connector bridge事件验证和安全保护机制
- 优化任务路由逻辑，区分simple_chat和new_task场景
- 更新初始技能工具提示配置，分离authoring admin功能

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

@@ -149,6 +149,22 @@ def test_router_injects_intent_skill_guidance() -> None:
     assert "Weather and current external data" in prompt
 
 
+def test_router_prompt_treats_unrelated_lightweight_conversation_as_new_topic() -> None:
+    provider = RouterProvider('{"action":"simple_chat","reason":"unrelated lightweight conversation"}')
+
+    asyncio.run(
+        MainAgentRouter().classify(
+            "吃饭没",
+            active_task=_task(),
+            provider=provider,
+        )
+    )
+
+    prompt = provider.calls[0]["messages"][1]["content"]
+    assert "unrelated lightweight conversation" in prompt
+    assert "must not be classified as revise_task merely because the active Task is awaiting acceptance" in prompt
+
+
 def test_router_closes_active_task_from_llm_decision() -> None:
     decision = asyncio.run(
         MainAgentRouter().classify(