feat: get/check coin

Closes #661

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/utils/accounts/account_manager/account_mgr.dart

@@ -177,7 +177,8 @@ class AccountManager extends Interceptor {
       'online/total',
       'github',
       'hdslb.com',
-      'biliimg.com'
+      'biliimg.com',
+      'site/getCoin',
     ];
     String url = err.requestOptions.uri.toString();
     debugPrint('🌹🌹ApiInterceptor: $url');

lib/utils/global_data.dart

@@ -3,6 +3,14 @@ class GlobalData {
 
   int replyLengthLimit = 6;
 
+  num? coins;
+
+  void afterCoin(int coin) {
+    if (coins != null) {
+      coins = coins! - coin;
+    }
+  }
+
   // 私有构造函数
   GlobalData._();