feat: phase1 UI prep — 设备ID系统传递 + 国家本地化展示 + 继续观看直进播放页

设备标识: Android SSAID/ iOS IDFV 原生通道 → Dart DeviceIdProvider
国家解析: 注册/登录从后端 IP → 国家/语言/时区/币种 自动落库
账号资料: 全部本地化展示 (account_display.dart)
我的页: 继续观看卡片点击直接进播放页

lib/core/data/remote/auth_api.dart

@@ -56,6 +56,7 @@ class AuthApi {
     required String target,
     required String code,
     required String deviceId,
+    String countryCode = '',
     String platform = '',
     String osVersion = '',
     String appVersion = '',
@@ -66,6 +67,7 @@ class AuthApi {
         'targetType': 'PHONE',
         'target': target,
         'code': code,
+        'countryCode': countryCode,
         'deviceId': deviceId,
         'platform': platform,
         'osVersion': osVersion,
@@ -79,6 +81,7 @@ class AuthApi {
     required String email,
     required String password,
     required String deviceId,
+    String countryCode = '',
     String platform = '',
     String osVersion = '',
     String appVersion = '',
@@ -89,7 +92,7 @@ class AuthApi {
         'targetType': 'EMAIL',
         'target': email,
         'password': password,
-        'countryCode': 'ID',
+        'countryCode': countryCode,
         'deviceId': deviceId,
         'platform': platform,
         'osVersion': osVersion,