feat: refactor API key configuration and enhance application initialization

- Renamed `check_environment` to `check_api_key_configured` for clarity, simplifying the API key validation logic.
- Removed the blocking behavior of the API key check during application startup, allowing the app to run while providing a prompt for configuration.
- Updated `LocalAgentApp` to accept an `api_configured` parameter, enabling conditional messaging for API key setup.
- Enhanced the `SandboxRunner` to support backup management and improved execution result handling with detailed metrics.
- Integrated data governance strategies into the `HistoryManager`, ensuring compliance and improved data management.
- Added privacy settings and metrics tracking across various components to enhance user experience and application safety.

start.bat

@@ -0,0 +1,91 @@
+@echo off
+chcp 65001 >nul
+title LocalAgent 启动器
+
+echo ========================================
+echo LocalAgent - 本地 AI 执行助手
+echo ========================================
+echo.
+
+REM 检查 Anaconda 是否安装
+where conda >nul 2>nul
+if %errorlevel% neq 0 (
+    echo [错误] 未检测到 Anaconda/Miniconda
+    echo 请先安装 Anaconda 或 Miniconda
+    echo 下载地址: https://www.anaconda.com/download
+    echo.
+    pause
+    exit /b 1
+)
+
+REM 检查虚拟环境是否存在
+conda env list | findstr "localagent" >nul 2>nul
+if %errorlevel% neq 0 (
+    echo [提示] 未找到 localagent 虚拟环境
+    echo 正在创建虚拟环境...
+    echo.
+    call conda create -n localagent python=3.10 -y
+    if %errorlevel% neq 0 (
+        echo [错误] 虚拟环境创建失败
+        pause
+        exit /b 1
+    )
+    echo.
+    echo [成功] 虚拟环境创建完成
+    echo.
+)
+
+REM 激活虚拟环境
+echo [1/3] 激活虚拟环境 localagent...
+call conda activate localagent
+if %errorlevel% neq 0 (
+    echo [错误] 虚拟环境激活失败
+    pause
+    exit /b 1
+)
+
+REM 检查依赖是否安装
+echo [2/3] 检查依赖...
+python -c "import dotenv" >nul 2>nul
+if %errorlevel% neq 0 (
+    echo [提示] 检测到缺少依赖，正在安装...
+    echo.
+    pip install -r requirements.txt
+    if %errorlevel% neq 0 (
+        echo [错误] 依赖安装失败
+        pause
+        exit /b 1
+    )
+    echo.
+    echo [成功] 依赖安装完成
+    echo.
+)
+
+REM 检查 .env 文件
+if not exist ".env" (
+    echo [警告] 未找到 .env 配置文件
+    if exist ".env.example" (
+        echo 正在从 .env.example 创建 .env...
+        copy .env.example .env >nul
+        echo [提示] 请编辑 .env 文件配置 API Key
+    ) else (
+        echo [提示] 请创建 .env 文件并配置 API Key
+    )
+    echo.
+)
+
+REM 启动应用
+echo [3/3] 启动 LocalAgent...
+echo ========================================
+echo.
+python main.py
+
+REM 如果程序异常退出，暂停以查看错误信息
+if %errorlevel% neq 0 (
+    echo.
+    echo ========================================
+    echo [错误] 程序异常退出
+    echo ========================================
+    pause
+)
+