feat(douyu-pool): 完善微信扫码支付与任务闭环及常用快捷选择

- 前端在扫码支付弹窗中增加显眼充值金额卡片与多账号 Tabs 支付标注
- 前端增加常用与历史快捷皮肤选择胶囊栏，支持本地缓存记忆与一键切换
- 后端补给链首步引入 query_elite_status 并支持 require_opened 前置熔断校验
- 优化供给与预估花费文案展示，增加兑换结果大图预览与凭证复制功能
- 验证方式：全量 784 个 pytest 用例全部通过，前端 tsc/build 校验通过

tests/test_douyu_pool_api.py

@@ -208,8 +208,8 @@ class TestExchange(_ApiBase):
         assert result.allocated == 1
         tasks = self.session.query(DouyuTask).order_by(DouyuTask.id.asc()).all()
         assert [t.task_type for t in tasks] == [
+            "query_elite_status",
             "query_gold_balance",
-            "query_points",
             "create_gold_qr",
             "donate_elite_gift",
             "exchange_goods",

tests/test_supply_chain.py

@@ -28,12 +28,13 @@ class TestBuildSupplyChain:
         assert chain[0].payload == {"commodity_id": "C1", "num": 1}
 
     def test_tier_b_refreshes_before_spending(self):
-        """链首必须先刷余额 —— 否则 `_skip_when` 读的是旧值，会多充钱。"""
+        """链首必须先查开通状态与余额 —— 否则未开通会误充值，旧值会多充钱。"""
         chain = pool.build_supply_chain(self._candidate(300), commodity_id="C1")
         assert [s.task_type for s in chain][:2] == [
+            "query_elite_status",
             "query_gold_balance",
-            "query_points",
         ]
+        assert chain[0].payload == {"require_opened": True}
 
     def test_tier_b_topup_amount_is_exact_gap(self):
         # 缺口 980 分 → 98 个令 → 98 元