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_session_archive.py

@@ -0,0 +1,107 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from fastapi.testclient import TestClient
+
+from beaver.engine.session import SessionManager
+from beaver.interfaces.web.app import create_app
+from beaver.services.agent_service import AgentService
+
+
+def test_archived_sessions_can_be_hidden_from_default_web_list(tmp_path: Path) -> None:
+    manager = SessionManager(tmp_path)
+    manager.ensure_session("web:keep", source="web")
+    manager.ensure_session("web:archived", source="web")
+    manager.end_session("web:archived", "archived")
+
+    visible = manager.list_sessions_rich(exclude_end_reasons=["archived"])
+    visible_ids = {row["id"] for row in visible}
+
+    assert "web:keep" in visible_ids
+    assert "web:archived" not in visible_ids
+    assert manager.get_session("web:archived")["end_reason"] == "archived"
+
+
+def test_archived_sessions_remain_available_to_history_search(tmp_path: Path) -> None:
+    manager = SessionManager(tmp_path)
+    manager.ensure_session("web:archived", source="web")
+    manager.end_session("web:archived", "archived")
+
+    all_sessions = manager.list_sessions_rich()
+
+    assert {row["id"] for row in all_sessions} == {"web:archived"}
+
+
+def test_visible_history_excludes_error_and_incomplete_runs(tmp_path: Path) -> None:
+    manager = SessionManager(tmp_path)
+    manager.ensure_session("web:history", source="web")
+    manager.append_message("web:history", run_id="ok-run", role="user", content="hello")
+    manager.append_message("web:history", run_id="ok-run", role="assistant", content="hi", finish_reason="stop")
+    manager.append_message(
+        "web:history",
+        run_id="ok-run",
+        role="assistant",
+        content=None,
+        tool_calls=[{"id": "call-1", "type": "function", "function": {"name": "echo", "arguments": "{}"}}],
+    )
+    manager.append_message(
+        "web:history",
+        run_id="ok-run",
+        role="tool",
+        content="tool result",
+        tool_call_id="call-1",
+    )
+    manager.append_message(
+        "web:history",
+        run_id="ok-run",
+        role="system",
+        event_type="run_completed",
+        content="hi",
+        context_visible=False,
+    )
+    manager.append_message("web:history", run_id="error-run", role="user", content="bad")
+    manager.append_message(
+        "web:history",
+        run_id="error-run",
+        role="assistant",
+        content="Error: provider failed",
+        finish_reason="error",
+    )
+    manager.append_message(
+        "web:history",
+        run_id="error-run",
+        role="system",
+        event_type="run_completed",
+        content="Error: provider failed",
+        finish_reason="error",
+        context_visible=False,
+    )
+    manager.append_message("web:history", run_id="pending-run", role="user", content="pending")
+
+    history = manager.get_visible_history("web:history")
+
+    assert [(message["role"], message["content"]) for message in history] == [
+        ("user", "hello"),
+        ("assistant", "hi"),
+    ]
+
+
+def test_web_archive_route_does_not_create_archive_suffix_session(tmp_path: Path) -> None:
+    service = AgentService(workspace=tmp_path)
+    app = create_app(service=service, manage_service_lifecycle=False)
+
+    with TestClient(app) as client:
+        create_response = client.post("/api/sessions/web:alpha")
+        archive_response = client.post("/api/sessions/web:alpha/archive")
+        sessions_response = client.get("/api/sessions")
+
+    assert create_response.status_code == 200
+    assert archive_response.status_code == 200
+    assert archive_response.json() == {"ok": True, "archived": True}
+    assert sessions_response.status_code == 200
+
+    loaded = service.create_loop().boot()
+    assert loaded.session_manager.get_session("web:alpha")["end_reason"] == "archived"  # type: ignore[union-attr]
+    assert loaded.session_manager.get_session("web:alpha/archive") is None  # type: ignore[union-attr]
+    assert sessions_response.json() == []