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/widgets/empty_state_widget.dart

@@ -0,0 +1,55 @@
+import 'package:flutter/material.dart';
+import '../../../core/theme/app_theme.dart';
+
+/// 空状态组件
+/// 统一的空数据展示样式
+class EmptyStateWidget extends StatelessWidget {
+  final IconData icon;
+  final String message;
+  final String? actionText;
+  final VoidCallback? onAction;
+
+  const EmptyStateWidget({
+    super.key,
+    required this.icon,
+    required this.message,
+    this.actionText,
+    this.onAction,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Center(
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          Icon(
+            icon,
+            size: 64,
+            color: AppTheme.idleColor,
+          ),
+          const SizedBox(height: 16),
+          Text(
+            message,
+            style: TextStyle(
+              color: AppTheme.textSecondary,
+              fontSize: 16,
+            ),
+          ),
+          if (actionText != null && onAction != null) ...[
+            const SizedBox(height: 24),
+            ElevatedButton.icon(
+              onPressed: onAction,
+              icon: const Icon(Icons.add, size: 20),
+              label: Text(actionText!),
+              style: ElevatedButton.styleFrom(
+                backgroundColor: AppTheme.primaryColor,
+                foregroundColor: Colors.white,
+              ),
+            ),
+          ],
+        ],
+      ),
+    );
+  }
+}