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

web/backend/services/account_pool.py

@@ -635,9 +635,15 @@ def build_supply_chain(
             )
         ]
 
+    # 检查手册开通状态与最新积分
+    status_step = (
+        SupplyStep("query_elite_status", {"require_opened": True})
+        if exchange_task_type == "exchange_goods"
+        else SupplyStep("query_points", {})
+    )
     steps: list[SupplyStep] = [
+        status_step,
         SupplyStep("query_gold_balance", {}),
-        SupplyStep("query_points", {}),
     ]
     # 充值：余额够就跳过（闸门在执行时求值，读的是刚刷新过的账号字段）
     for amount in recharge_amounts_for(candidate.topup_gifts):

web/backend/services/douyu_runner_manual.py

@@ -117,6 +117,16 @@ class ManualMixin:
         state = "已开通" if result["elite_opened"] else "未开通"
         expire_text = self._format_expire_text(result["elite_expire_time"])
         points = result["elite_manual_score"]
+        payload = self._task_payload(task)
+        if payload.get("require_opened") and not result["elite_opened"]:
+            self._mark_task(
+                db,
+                task,
+                "failed",
+                "精英宝典未开通，无法继续充值或兑换，请先开通手册",
+                result,
+            )
+            return
         self._mark_task(
             db,
             task,