修复：签到膨胀金币归入看视频分类 (#169)

## 修改内容

- 将历史 `signin_boost` 金币从“常规任务金币”分类移出。
- 将 `signin_boost` 与 `reward_video/ad_reward` 一起计入“看视频金币”。
- 保留独立的 `signin_boost_coin_total` 历史审计字段。
- 增加不重不漏回归测试，确认分类调整前后本期发放总额保持不变。

## 本地验证

- `tests/test_admin_read.py`：16 项通过。
- Ruff 与 `git diff --check`：通过。
- 全量后端测试：505 项通过；8 项为 `main` 现有无关失败。

---------

Co-authored-by: unknown <798648091@qq.com>
Reviewed-on: #169
Co-authored-by: linkeyu <linkeyu@wonderable.ai>
Co-committed-by: linkeyu <linkeyu@wonderable.ai>

tests/test_admin_read.py

@@ -468,13 +468,13 @@ def test_period_regular_task_coin_uses_explicit_allowlist(
     d = "2021-06-18"
     included = {
         "signin": 100,
-        "signin_boost": 200,
         "task_enable_notification": 300,
         "task_other": 400,
         "price_report_reward": 500,
         "feedback_reward": 600,
     }
     excluded = {
+        "signin_boost": 200,
         "feed_ad_reward_coupon": 700,
         "feed_ad_reward_comparison": 800,
         "feed_ad_reward": 900,
@@ -514,3 +514,51 @@ def test_period_regular_task_coin_uses_explicit_allowlist(
     coins = response.json()["period"]["coins"]
     assert coins["regular_task_coin_total"] == sum(included.values())
     assert coins["task_coin_total"] == 700
+    assert coins["reward_video_coin_total"] == 1200
+
+
+def test_period_signin_boost_moves_to_reward_video_without_double_count(
+    admin_client: TestClient, admin_token: str
+) -> None:
+    """历史签到膨胀归看视频桶，不再进常规任务；本期发放总额不变且不重复计算。"""
+    from datetime import datetime
+
+    from app.models.wallet import CoinTransaction
+
+    d = "2021-06-19"
+    rows = [
+        ("signin_boost", 200),
+        ("reward_video", 100),
+        ("signin", 50),
+    ]
+    db = SessionLocal()
+    try:
+        uid = user_repo.upsert_user_for_login(
+            db, phone="13800008805", register_channel="sms"
+        ).id
+        balance = 0
+        for index, (biz_type, amount) in enumerate(rows, start=1):
+            balance += amount
+            db.add(CoinTransaction(
+                user_id=uid,
+                amount=amount,
+                balance_after=balance,
+                biz_type=biz_type,
+                ref_id=f"signin-boost-route-{index}",
+                created_at=datetime(2021, 6, 19, 12, 0, index),
+            ))
+        db.commit()
+    finally:
+        db.close()
+
+    response = admin_client.get(
+        "/admin/api/stats/overview",
+        params={"date_from": d, "date_to": d},
+        headers=_auth(admin_token),
+    )
+    assert response.status_code == 200, response.text
+    coins = response.json()["period"]["coins"]
+    assert coins["granted_total"] == 350
+    assert coins["reward_video_coin_total"] == 300
+    assert coins["regular_task_coin_total"] == 50
+    assert coins["signin_boost_coin_total"] == 200