refactor: restructure to core/ + ui/ with multi-threaded backend

ui/services/tool_service.py

@@ -0,0 +1,88 @@
+"""工具服务"""
+
+import asyncio
+import time
+from datetime import datetime
+from typing import Callable, TYPE_CHECKING
+from ..core.imports import execute_tool
+from ..models.log_entry import LogEntry
+from ..models.message import ToolCall, ToolResult
+
+if TYPE_CHECKING:
+    from ..core.imports import Neo4jGraph
+
+
+class ToolService:
+    """工具执行服务"""
+
+    def __init__(
+        self,
+        graph: "Neo4jGraph",
+        log_callback: Callable[[LogEntry], None] | None = None
+    ):
+        self._graph = graph
+        self._log_callback = log_callback
+
+    async def execute(self, tool_call: ToolCall) -> ToolResult:
+        """异步执行工具"""
+        start_time = time.time()
+
+        try:
+            # 在线程池中执行同步工具
+            loop = asyncio.get_event_loop()
+            result = await loop.run_in_executor(
+                None,
+                lambda: execute_tool(self._graph, tool_call.name, tool_call.arguments)
+            )
+
+            duration = time.time() - start_time
+
+            # 创建日志条目
+            log_entry = LogEntry(
+                timestamp=datetime.now(),
+                tool_name=tool_call.name,
+                arguments=tool_call.arguments,
+                result=result,
+                duration=duration
+            )
+
+            # 回调日志
+            if self._log_callback:
+                self._log_callback(log_entry)
+
+            # 返回结果
+            return ToolResult(
+                tool_call_id=tool_call.id,
+                name=tool_call.name,
+                arguments=tool_call.arguments,
+                result=result,
+                success=not result.startswith("工具执行错误")
+            )
+
+        except Exception as e:
+            duration = time.time() - start_time
+            error_msg = f"工具执行异常: {str(e)}"
+
+            # 创建错误日志
+            log_entry = LogEntry(
+                timestamp=datetime.now(),
+                tool_name=tool_call.name,
+                arguments=tool_call.arguments,
+                result=error_msg,
+                duration=duration
+            )
+
+            if self._log_callback:
+                self._log_callback(log_entry)
+
+            return ToolResult(
+                tool_call_id=tool_call.id,
+                name=tool_call.name,
+                arguments=tool_call.arguments,
+                result=error_msg,
+                success=False
+            )
+
+    def set_log_callback(self, callback: Callable[[LogEntry], None]) -> None:
+        """设置日志回调"""
+        self._log_callback = callback