feat(douyu-pool): 支持和平精英号池兑换与商品自动刷新，优化号池操作面板

- 扩展号池支持 peace (和平精英/小跑道) 活动 scope，映射 xpd_balance 与 exchange_xpd_goods 任务
- 新增 POST /douyu/pool/refresh-goods 接口与前端一键刷新，支持复用库内有效 CK 自动更新商品快照
- 前端 DouyuPoolPage 升级视觉设计与栅格布局，商品选择器支持按活动类型分类联动
- 修复 DouyuTask.result 类型守卫、account_events actor_id 类型防御与 runner 过滤规则边界值处理
- 验证方式：全量 pytest (797 通过)、pyright (0 错误)、tsc -b 及 ruff format/check 全部通过

tests/test_douyu_pool_api.py

@@ -101,13 +101,33 @@ class TestSupply(_ApiBase):
     def test_unsupported_scope_is_400(self):
         with pytest.raises(HTTPException) as exc:
             pool_router.pool_supply(
-                scope="peace",
+                scope="unknown_scope",
                 commodity_id=COMMODITY,
                 db=self.session,
                 current=self.support,
             )
         assert exc.value.status_code == 400
 
+    def test_peace_scope_supply(self):
+        from web.backend.models import DouyuXpdGoodsSnapshot
+
+        xpd_item = DouyuXpdGoodsSnapshot(
+            commodity_id="xpd_bag_1",
+            name="和平礼包",
+            price=8800,
+        )
+        self.session.add(xpd_item)
+        self.session.commit()
+
+        supply = pool_router.pool_supply(
+            scope="peace",
+            commodity_id="xpd_bag_1",
+            db=self.session,
+            current=self.support,
+        )
+        assert supply["commodity"]["name"] == "和平礼包"
+        assert supply["commodity"]["score"] == 8800
+
 
 class TestExchange(_ApiBase):
     def _patch_runner(self, monkeypatch, captured: list):
@@ -151,6 +171,7 @@ class TestExchange(_ApiBase):
         assert task.task_type == "exchange_goods"
         assert task.handbook_scope == "elite"
         assert task.batch_id == result.batch_id
+        assert task.result is not None
         assert task.result["payload"]["commodity_id"] == COMMODITY
         assert task.result["payload"]["num"] == 1