xiaoli-cli 7.0.0: 重构底层架构 + 移除工具截断

- 重构 core/ 底层 (7文件): app/runner/engine/parser/history/safety/display
- FC原生调用为主，prompt-JSON保底
- 移除所有工具返回截断 (ai_search/git_tools/cmd_executor/browser_auto/network_tools/sub_agent/tool_search)
- 删除无用文件 (旧服务器/WebUI/彩蛋/启动器等21个文件)
- 清理 constants.py 死代码
- 版本号更新为 7.0.0

xcli_core/tool_result.py

@@ -0,0 +1,119 @@
+"""
+统一工具返回格式 - ToolResult
+
+所有插件和工具管理器使用统一的返回格式，
+替代原来混乱的字符串/Dict 返回。
+"""
+
+from dataclasses import dataclass, field
+from typing import Any, Optional
+
+
+# 错误码常量
+class ErrorCode:
+    """工具错误码"""
+    SUCCESS = 0
+    # 参数错误 (1xx)
+    MISSING_ARGS = 100
+    INVALID_ARGS = 101
+    UNSUPPORTED_OP = 102
+    # 资源错误 (2xx)
+    NOT_FOUND = 200
+    FILE_NOT_FOUND = 201
+    PERMISSION_DENIED = 202
+    # 执行错误 (3xx)
+    EXEC_FAILED = 300
+    TIMEOUT = 301
+    DECODE_ERROR = 302
+    # 系统错误 (4xx)
+    INTERNAL_ERROR = 400
+    NOT_IMPLEMENTED = 401
+
+    _NAMES = {
+        0: "成功",
+        100: "缺少参数",
+        101: "参数无效",
+        102: "不支持的操作",
+        200: "未找到",
+        201: "文件不存在",
+        202: "权限不足",
+        300: "执行失败",
+        301: "超时",
+        302: "解码错误",
+        400: "内部错误",
+        401: "未实现",
+    }
+
+    @classmethod
+    def name(cls, code: int) -> str:
+        return cls._NAMES.get(code, f"未知({code})")
+
+
+@dataclass
+class ToolResult:
+    """统一工具返回格式"""
+
+    success: bool
+    data: Any = None
+    error_code: int = ErrorCode.SUCCESS
+    error_message: str = ""
+
+    # 可选元数据
+    tool_name: str = ""
+    execution_time: float = 0.0
+    metadata: dict = field(default_factory=dict)
+
+    def __str__(self) -> str:
+        if self.success:
+            return str(self.data) if self.data is not None else "执行完成"
+        return f"[{ErrorCode.name(self.error_code)}] {self.error_message}"
+
+    # ── 便捷构造方法 ──
+
+    @classmethod
+    def ok(cls, data: Any = None, **kwargs) -> "ToolResult":
+        """成功"""
+        return cls(success=True, data=data, **kwargs)
+
+    @classmethod
+    def fail(cls, message: str, code: int = ErrorCode.EXEC_FAILED, **kwargs) -> "ToolResult":
+        """失败"""
+        return cls(success=False, error_code=code, error_message=message, **kwargs)
+
+    @classmethod
+    def missing(cls, what: str = "参数", **kwargs) -> "ToolResult":
+        """缺少参数"""
+        return cls.fail(f"缺少{what}", ErrorCode.MISSING_ARGS, **kwargs)
+
+    @classmethod
+    def not_found(cls, what: str = "资源", **kwargs) -> "ToolResult":
+        """未找到"""
+        return cls.fail(f"{what}不存在", ErrorCode.NOT_FOUND, **kwargs)
+
+    @classmethod
+    def timeout(cls, seconds: int = 0, **kwargs) -> "ToolResult":
+        """超时"""
+        msg = f"执行超时"
+        if seconds:
+            msg += f" ({seconds}秒)"
+        return cls.fail(msg, ErrorCode.TIMEOUT, **kwargs)
+
+    # ── 格式转换 ──
+
+    def to_dict(self) -> dict:
+        """转为普通 dict（兼容旧接口）"""
+        if self.success:
+            return {"result": self.data if self.data is not None else "执行完成"}
+        return {"result": str(self)}
+
+    def to_mcp(self) -> dict:
+        """转为 MCP 协议格式"""
+        text = str(self)
+        return {
+            "content": [{"type": "text", "text": text}],
+            "isError": not self.success,
+        }
+
+    def to_string(self) -> str:
+        """转为字符串（兼容旧插件 handle() 返回值）"""
+        return str(self)