feat: 新增工具插件、系统日志、workflow配置及前端优化

1. 新增工具插件(edit_file, python_executor, search_file, shell_executor, write_file)
2. 新增系统事件日志模块和API
3. 新增workflow配置文件和详情API
4. 前端增加SSE、错误边界、设置引导等组件
5. 优化认证加密、速率限制、配置加载等工具模块
6. 删除废弃的cluster和health API
7. 补充单元测试和集成测试

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/unit/test_api_health.py

@@ -1,4 +1,4 @@
-"""``api/health.py`` 健康探针端点。"""
+"""``api/system.py`` 健康探针端点。"""
 
 from __future__ import annotations
 
@@ -9,13 +9,13 @@ import pytest
 from fastapi import FastAPI
 from httpx import AsyncClient, ASGITransport
 
-from kilostar.api.health import health_router
+from kilostar.api.system import system_router
 
 
 @pytest.fixture
 def health_app() -> FastAPI:
     app = FastAPI()
-    app.include_router(health_router)
+    app.include_router(system_router)
     return app