test(withdraw): 补 invite_cash 并发在途用例 + 清理过期注释

审查发现:取消「一人一单」后,create_withdraw 的档位闸注释与
test_invite_cash_withdraw 中若干注释仍引用已删除的「在途互斥」。
- create_withdraw 注释去掉「在途互斥」措辞
- test_two_accounts_withdraw_independent 文案修正;source_filter
  用例移除已非必需的 reject(断言不变)
- 新增 test_invite_cash_multiple_in_flight_allowed:两笔 invite_cash
  在途并存、各扣邀请奖励金、不串金币现金

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/repositories/wallet.py

@@ -751,7 +751,7 @@ def create_withdraw(
         out_bill_no = uuid.uuid4().hex
 
     # 福利页档位闸(7-9):coin_cash 只能提预设档位,且该档今日可提(服务端权威口径,防绕过
-    # 客户端刷)。放在幂等返回/在途互斥之后:同号重试仍原样返回旧单,不被档位闸误杀。
+    # 客户端刷)。放在幂等返回之后:同号重试仍原样返回旧单,不被档位闸误杀。
     # allow_sub_min(0.01 调试直发)保持原样放行,不受档位约束;invite_cash 本轮无档位概念不校验。
     if source == "coin_cash" and not allow_sub_min:
         tier_state = next(

tests/test_invite_cash_withdraw.py

@@ -128,8 +128,7 @@ def test_invite_cash_reject_refunds_invite_account(client, monkeypatch) -> None:
 
 
 def test_two_accounts_withdraw_independent(client, monkeypatch) -> None:
-    """两账户各提各的不串:先提 invite_cash(拒绝结清),再提 cash,各扣各账户。
-    注:一个用户同一时间只能一个活跃提现单(跨账户),故第二笔需先结清第一笔。"""
+    """两账户各提各的不串:提 invite_cash(拒绝→验证退款回原账户),再提 cash,各扣各账户互不串。"""
     _patch_userinfo(monkeypatch, "openid_ic_3")
     token = _login(client, "13800004003")
     _seed_balances(client, token, "13800004003", cash=400, invite_cash=500)
@@ -140,7 +139,7 @@ def test_two_accounts_withdraw_independent(client, monkeypatch) -> None:
         json={"amount_cents": 200, "source": "invite_cash"},
         headers=_auth(token),
     )
-    _reject(r1.json()["out_bill_no"])    # 退回 invite_cash + 结清活跃单
+    _reject(r1.json()["out_bill_no"])    # 拒绝退回 invite_cash(验证退款回原账户)
     r2 = client.post(
         "/api/v1/wallet/withdraw",
         # 50 分 = 0.5 元档(7-9 起 coin_cash 只能提预设档位)
@@ -154,6 +153,39 @@ def test_two_accounts_withdraw_independent(client, monkeypatch) -> None:
     assert cash == 350           # 扣了 cash 50
 
 
+def test_invite_cash_multiple_in_flight_allowed(client, monkeypatch) -> None:
+    """取消「同时仅一单」:invite_cash 无档位上限,已有在途时仍可继续提交,多笔并存各扣 invite_cash。"""
+    _patch_userinfo(monkeypatch, "openid_ic_multi")
+    token = _login(client, "13800004006")
+    _seed_balances(client, token, "13800004006", cash=0, invite_cash=500)
+    client.post("/api/v1/wallet/bind-wechat", json={"code": "c"}, headers=_auth(token))
+
+    r1 = client.post(
+        "/api/v1/wallet/withdraw",
+        json={"amount_cents": 200, "source": "invite_cash", "out_bill_no": "billicflight0001"},
+        headers=_auth(token),
+    )
+    assert r1.status_code == 200, r1.text
+    assert r1.json()["status"] == "reviewing"
+
+    r2 = client.post(
+        "/api/v1/wallet/withdraw",
+        json={"amount_cents": 200, "source": "invite_cash", "out_bill_no": "billicflight0002"},
+        headers=_auth(token),
+    )
+    assert r2.status_code == 200, r2.text
+    assert r2.json()["status"] == "reviewing"
+
+    # 两笔 invite_cash 在途并存,共扣 400(500→100),金币现金不动
+    cash, invite_cash = _balances(client, token)
+    assert invite_cash == 100 and cash == 0
+    orders = client.get(
+        "/api/v1/wallet/withdraw-orders", params={"source": "invite_cash"}, headers=_auth(token)
+    ).json()["items"]
+    reviewing = [o for o in orders if o["status"] == "reviewing"]
+    assert len(reviewing) == 2
+
+
 def test_invite_me_returns_reward_stats(client) -> None:
     """/invite/me 返回 reward_balance_cents(可提现奖励金)。"""
     token = _login(client, "13800004004")
@@ -170,12 +202,11 @@ def test_withdraw_orders_source_filter(client, monkeypatch) -> None:
     _seed_balances(client, token, "13800004005", cash=400, invite_cash=500)
     client.post("/api/v1/wallet/bind-wechat", json={"code": "c"}, headers=_auth(token))
 
-    r1 = client.post(
+    client.post(
         "/api/v1/wallet/withdraw",
         json={"amount_cents": 200, "source": "invite_cash"},
         headers=_auth(token),
     )
-    _reject(r1.json()["out_bill_no"])    # 结清,才能提第二笔
     client.post(
         "/api/v1/wallet/withdraw",
         # 50 分 = 0.5 元档(7-9 起 coin_cash 只能提预设档位)