docs(welfare): 15天不活跃清零金币/现金 设计文档(spec) (#151)

对齐前端首页可见事件home_visible

---------

Co-authored-by: guke <guke@autohome.com.cn>
Reviewed-on: #151

scripts/seed_inactivity_cases.py

@@ -33,6 +33,7 @@ from app.models.wallet import (  # noqa: E402
     CoinTransaction,
     InviteCashTransaction,
 )
+from app.repositories import activity  # noqa: E402
 from app.repositories import wallet as wallet_repo  # noqa: E402
 
 MARK = "vcase"  # username 前缀,用于清理
@@ -47,7 +48,7 @@ CASES = [
     ("6 只有现金",        30,   0, 200,   0, None, "清 cash;审计1行+1流水"),
     ("7 只有邀请(红线)",  30,   0,   0, 300, None, "不选中/不清/无审计/无流水;invite=300 原封"),
     ("8 预警窗(10天)",    10,  50,  60,  70, None, "不清;发 T-7 预警;notification_log 1行;余额不动"),
-    ("9 活跃兜底",        30, 100, 200, 300,    1, "昨日 home_view→last_active 近→不清不警"),
+    ("9 活跃兜底",        30, 100, 200, 300,    1, "昨日 home_visible→last_active 近→不清不警"),
     ("10 新用户(3天)",     3, 100, 200,   0, None, "created_at 近→不清不警"),
 ]
 
@@ -86,8 +87,8 @@ def seed(db) -> None:
         acc.coin_balance, acc.cash_balance_cents, acc.invite_cash_balance_cents = coin, cash, invite
         acc.total_coin_earned = coin
         if ev_days is not None:
-            db.add(AnalyticsEvent(  # 首页可见 = event=show + page=home
-                event="show", page="home", device_id=MARK, user_id=u.id,
+            db.add(AnalyticsEvent(  # 首页可见 = event=home_visible(单一 event 名,见 activity.ACTIVE_EVENTS)
+                event=activity.HOME_VISIBLE_EVENT, device_id=MARK, user_id=u.id,
                 client_ts=0, created_at=now - timedelta(days=ev_days),
             ))
         db.flush()