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>

kilostar/core/postgres_database/module/system_event_log.py

@@ -0,0 +1,72 @@
+from __future__ import annotations
+
+from typing import List, Optional
+from sqlalchemy import select, desc
+from sqlalchemy.ext.asyncio import async_sessionmaker, AsyncSession
+
+from kilostar.core.postgres_database.model.system_event_log import SystemEventLog
+from kilostar.core.postgres_database.database_exception import database_exception
+
+
+class SystemEventLogDatabase:
+    def __init__(self, async_session_maker: async_sessionmaker[AsyncSession]):
+        self.async_session_maker = async_session_maker
+
+    @database_exception
+    async def insert_event(
+        self,
+        trace_id: str,
+        event_type: str,
+        level: str,
+        message: str,
+        node_name: Optional[str] = None,
+        metadata: Optional[dict] = None,
+    ) -> None:
+        async with self.async_session_maker() as session:
+            log = SystemEventLog(
+                trace_id=trace_id,
+                event_type=event_type,
+                level=level,
+                message=message,
+                node_name=node_name,
+                extra_data=metadata,
+            )
+            session.add(log)
+            await session.commit()
+
+    @database_exception
+    async def query_events(
+        self,
+        trace_id: Optional[str] = None,
+        event_type: Optional[str] = None,
+        level: Optional[str] = None,
+        limit: int = 100,
+        offset: int = 0,
+    ) -> List[dict]:
+        async with self.async_session_maker() as session:
+            stmt = select(SystemEventLog).order_by(desc(SystemEventLog.created_at))
+
+            if trace_id:
+                stmt = stmt.where(SystemEventLog.trace_id == trace_id)
+            if event_type:
+                stmt = stmt.where(SystemEventLog.event_type == event_type)
+            if level:
+                stmt = stmt.where(SystemEventLog.level == level)
+
+            stmt = stmt.offset(offset).limit(limit)
+            result = await session.execute(stmt)
+            rows = result.scalars().all()
+
+            return [
+                {
+                    "id": r.id,
+                    "trace_id": r.trace_id,
+                    "event_type": r.event_type,
+                    "level": r.level,
+                    "node_name": r.node_name,
+                    "message": r.message,
+                    "metadata": r.extra_data,
+                    "created_at": str(r.created_at) if r.created_at else None,
+                }
+                for r in rows
+            ]