chore(project): 初始化项目基础配置文件

- 添加 CodeGraph、Android 和通用 gitignore 配置
- 创建项目元数据文件跟踪 Flutter 项目属性
- 添加 Codex AI 指导文档 AGENTS.md 说明项目架构
- 配置代码分析选项 analysis_options.yaml
- 设置 Android 应用清单权限和 Kiosk 模式配置
- 实现中英文国际化支持 AppLocalizations
- 配置 GoRouter 应用路由导航
- 创建明亮工业控制风格的主题配置 AppTheme

lib/shared/utils/constants.dart

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+/// 常量定义
+class Constants {
+  // 速度选项
+  static const List<String> speedOptions = ['低速', '中速', '高速'];
+
+  // 下针速度档位
+  static const List<int> needleSpeedLevels = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+
+  // 孔位列表
+  static const List<String> positions = [
+    'A1', 'A2', 'A3', 'A4', 'A5', 'A6',
+    'B1', 'B2', 'B3', 'B4', 'B5', 'B6',
+    'C1', 'C2', 'C3', 'C4', 'C5', 'C6',
+    'D1', 'D2', 'D3', 'D4', 'D5', 'D6',
+  ];
+
+  // 默认步骤名称
+  static const List<String> defaultStepNames = ['混合', '吸磁', '吹气', '下针'];
+
+  // 时间单位
+  static const String timeUnitSeconds = '秒';
+  static const String timeUnitMinutes = '分钟';
+  static const String volumeUnit = 'μL';
+}

lib/shared/utils/responsive_layout.dart

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+import 'package:flutter/material.dart';
+
+/// 响应式布局工具类
+/// 目标屏幕: 1920x1080
+class ResponsiveLayout {
+  static const double targetWidth = 1920;
+  static const double targetHeight = 1080;
+
+  /// 获取屏幕宽度比例
+  static double widthPercent(BuildContext context, double percent) {
+    return MediaQuery.of(context).size.width * percent;
+  }
+
+  /// 获取屏幕高度比例
+  static double heightPercent(BuildContext context, double percent) {
+    return MediaQuery.of(context).size.height * percent;
+  }
+
+  /// 基于目标屏幕缩放宽度
+  static double scaleWidth(BuildContext context, double targetValue) {
+    final screenWidth = MediaQuery.of(context).size.width;
+    return targetValue * (screenWidth / targetWidth);
+  }
+
+  /// 基于目标屏幕缩放高度
+  static double scaleHeight(BuildContext context, double targetValue) {
+    final screenHeight = MediaQuery.of(context).size.height;
+    return targetValue * (screenHeight / targetHeight);
+  }
+
+  /// 基于目标屏幕缩放字体
+  static double scaleFont(BuildContext context, double targetFontSize) {
+    return scaleWidth(context, targetFontSize);
+  }
+
+  /// 预设布局尺寸
+  static double sidebarWidth(BuildContext context) => widthPercent(context, 0.25);  // 480px on 1920
+  static double detailWidth(BuildContext context) => widthPercent(context, 0.21);   // 400px on 1920
+  static double navWidth(BuildContext context) => widthPercent(context, 0.15);     // 280px on 1920
+  static double cardWidth(BuildContext context) => widthPercent(context, 0.30);    // ~576px
+}
+
+/// 响应式间距
+class ResponsiveSpacing {
+  static double small(BuildContext context) => ResponsiveLayout.scaleWidth(context, 8);
+  static double medium(BuildContext context) => ResponsiveLayout.scaleWidth(context, 16);
+  static double large(BuildContext context) => ResponsiveLayout.scaleWidth(context, 24);
+  static double xlarge(BuildContext context) => ResponsiveLayout.scaleWidth(context, 32);
+}