feat: 添加用户行为分析功能

apps/lib/core/config/env.dart

@@ -1,6 +1,8 @@
 import 'dart:io';
 
 import 'package:package_info_plus/package_info_plus.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 
 class Env {
   static String get apiUrl {
@@ -14,13 +16,33 @@ class Env {
     return 'http://localhost:5775';
   }
 
+  static String get analyticsEndpoint => '$apiUrl/api/v1/analytics/events';
+
   static String version = '0.1.0';
   static int build = 1;
+  static String deviceId = '';
 
   static Future<void> init() async {
     final info = await PackageInfo.fromPlatform();
     version = info.version;
     final buildStr = info.buildNumber.isEmpty ? '1' : info.buildNumber;
     build = int.tryParse(buildStr) ?? 1;
+
+    deviceId = await _getOrCreateDeviceId();
+  }
+
+  static Future<String> _getOrCreateDeviceId() async {
+    const storage = FlutterSecureStorage();
+    var deviceId = await storage.read(key: 'device_id');
+    if (deviceId == null || deviceId.isEmpty) {
+      final prefs = await SharedPreferences.getInstance();
+      deviceId = prefs.getString('device_id') ?? '';
+      if (deviceId.isEmpty) {
+        deviceId = 'install_${DateTime.now().millisecondsSinceEpoch}';
+        await prefs.setString('device_id', deviceId);
+      }
+      await storage.write(key: 'device_id', value: deviceId);
+    }
+    return deviceId;
   }
 }