feat: 续费提醒告警（Telegram/邮件多渠道+续费检查+每日定时+前端控制）

app/routers/notify.py

@@ -0,0 +1,42 @@
+"""通知与续费提醒路由"""
+
+from typing import Optional
+
+from fastapi import APIRouter, Depends, Query
+from sqlmodel import Session
+
+from app.core.security import require_api_key
+from app.database import get_session
+from app.services import notification_service, renewal_service
+
+router = APIRouter(prefix="/api/notify", tags=["notify"])
+
+
+@router.get("/channels", summary="已配置的通知渠道")
+def channels() -> dict:
+    return {"channels": notification_service.configured_channels()}
+
+
+@router.post(
+    "/test",
+    summary="测试通知渠道",
+    dependencies=[Depends(require_api_key)],
+)
+def test_notify() -> dict:
+    results = notification_service.notify(
+        "✅ 这是一条来自 vps-manager 的测试通知", subject="vps-manager 测试"
+    )
+    return {"notifications": results}
+
+
+@router.post(
+    "/renewals",
+    summary="检查续费并发送提醒",
+    dependencies=[Depends(require_api_key)],
+)
+def check_renewals(
+    threshold: Optional[int] = Query(default=None, description="提醒阈值天数，默认取配置"),
+    send: bool = Query(default=True, description="是否实际发送（false 仅预览）"),
+    session: Session = Depends(get_session),
+) -> dict:
+    return renewal_service.check_renewals(session, threshold_days=threshold, send=send)