feat(engine): 添加MCP连接管理和工具集成功能

- 集成MCP连接管理器，支持MCP服务器连接
- 添加多种内置工具：ClarifyTool、CronTool、DelegateTool、ExecuteCodeTool、
  PatchFileTool、ProcessTool、SendMessageTool、SpawnTool、TerminalTool、
  TodoTool、WebFetchTool、WebSearchTool、WriteFileTool等
- 实现工具注册和装配功能
- 添加技能选择上下文参数
- 支持思考模式控制参数thinking_enabled

feat(coordinator): 重构任务执行计划器参数命名

- 将learning_candidate_enabled重命名为allow_candidate_generation
- 更新TeamGraphScheduler中的参数传递
- 修改LocalAgentRunner中的相关参数处理
- 更新README文档中的相应描述

refactor(context): 标准化工具调用参数格式

- 添加_json导入用于参数序列化
- 实现_provider_tool_calls方法标准化OpenAI兼容的工具调用载荷
- 修复工具调用中参数非字符串类型的序列化问题

refactor(session): 优化消息历史记录过滤逻辑

- 修改get_messages_as_conversation为基于运行状态过滤消息
- 排除未完成、失败或错误结束的运行记录
- 改进对话历史的可见性控制机制

fix(store): 修复FTS索引重建逻辑

- 添加异常处理防止FTS索引创建失败
- 实现_rebuild_fts_index方法重新构建全文搜索索引
- 优化索引触发器和表的维护流程

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

@@ -1,4 +1,5 @@
 import json
+from pathlib import Path
 
 from beaver.engine import AgentLoop, EngineLoader
 from beaver.engine.providers import make_provider_bundle
@@ -42,6 +43,37 @@ def test_load_config_reads_current_instance_shape(tmp_path) -> None:
     assert target["extra_headers"] == {"X-Test": "1"}
 
 
+def test_provider_resolution_ignores_custom_and_disabled_overrides(tmp_path) -> None:
+    config_path = tmp_path / "config.json"
+    config_path.write_text(
+        json.dumps(
+            {
+                "agents": {
+                    "defaults": {
+                        "workspace": str(tmp_path / "workspace"),
+                        "model": "qwen-plus",
+                        "provider": "custom",
+                    }
+                },
+                "providers": {
+                    "custom": {},
+                    "openai": {
+                        "apiKey": "sk-test",
+                        "apiBase": "https://oai.example.com/v1",
+                    },
+                },
+            }
+        ),
+        encoding="utf-8",
+    )
+
+    config = load_config(config_path=config_path)
+
+    assert config.resolve_provider_target()["provider_name"] == "openai"
+    assert config.resolve_provider_target(provider_name="custom")["provider_name"] == "openai"
+    assert config.resolve_provider_target(provider_name="deepseek")["provider_name"] == "openai"
+
+
 def test_engine_loader_uses_config_workspace(tmp_path) -> None:
     workspace = tmp_path / "workspace"
     config_path = tmp_path / "config.json"
@@ -105,3 +137,40 @@ def test_openai_compatible_qwen_config_keeps_openai_provider() -> None:
     assert bundle.main_runtime.api_base == "https://oai.example.com/v1"
     assert isinstance(bundle.main_provider, LiteLLMProvider)
     assert bundle.main_provider._resolve_model("qwen-plus") == "openai/qwen-plus"
+
+
+def test_load_config_reads_stevenli_mcp_authz_identity() -> None:
+    repo_root = Path(__file__).resolve().parents[4]
+    config_path = repo_root / "app-instance" / "runtime" / "instances" / "stevenli" / "nanobot-home" / "config.json"
+    config = load_config(config_path=config_path)
+
+    server = config.tools.mcp_servers["outlook_mcp"]
+    assert server.transport == "http"
+    assert server.url == "http://10.6.80.29:8000/mcp"
+    assert server.auth_mode == "oauth_backend_token"
+    assert server.auth_audience == "mcp:outlook_mcp"
+    assert "tool:mail_list_messages" in server.auth_scopes
+    assert server.tool_timeout == 60
+    assert server.sensitive is True
+
+    assert config.authz.enabled is True
+    assert config.authz.base_url == "http://nano-authz-service:19090"
+    assert config.backend_identity.backend_id == "stevenli"
+    assert config.backend_identity.client_id == "stevenli"
+
+
+def test_load_config_adds_managed_local_mcp_servers(tmp_path) -> None:
+    config_path = tmp_path / "config.json"
+    config_path.write_text(
+        json.dumps({"tools": {"mcpServers": {}}}),
+        encoding="utf-8",
+    )
+
+    config = load_config(config_path=config_path)
+
+    local = config.tools.mcp_servers["local_filesystem_mcp"]
+    assert local.transport == "stdio"
+    assert local.kind == "local"
+    assert local.category == "filesystem"
+    assert local.managed is True
+    assert "beaver.interfaces.mcp.tools_server" in local.args