银行存取补充 user_currency_logs 流水记录

- CurrencySource 新增 BANK_DEPOSIT / BANK_WITHDRAW 两个来源枚举
- BankController deposit/withdraw 改用 UserCurrencyService::change() 记录 jjb 变动
- AiFinanceService bankExcessGold/raiseWalletTo 补充 UserCurrencyService::change() 调用
- 银行存取双轨记录：bank_logs（银行流水）+ user_currency_logs（金币流水）

app/Enums/CurrencySource.php

@@ -164,6 +164,12 @@ enum CurrencySource: string
     /** 猜谜活动奖励 */
     case GAME_REWARD = 'game_reward';
 
+    /** 存入银行（jjb → bank_jjb） */
+    case BANK_DEPOSIT = 'bank_deposit';
+
+    /** 从银行取款（bank_jjb → jjb） */
+    case BANK_WITHDRAW = 'bank_withdraw';
+
     /**
      * 返回该来源的中文名称，用于后台统计展示。
      */
@@ -218,6 +224,8 @@ enum CurrencySource: string
             self::MSG_DECORATION_BUY => '消息装扮购买（旧）',
             self::AVATAR_FRAME_BUY => '头像框购买',
             self::GAME_REWARD => '猜谜活动奖励',
+            self::BANK_DEPOSIT => '存入银行',
+            self::BANK_WITHDRAW => '银行取款',
         };
     }
 }