feat: expose GET /tickets/user/{user_id} endpoint

The webapp My Tickets view + the owned-ticket badges in the
activities feed both rely on this endpoint to enumerate a buyer's
tickets across all events. The CRUD function already existed
(`get_tickets_by_user_id`); just expose it.

Auth: Bearer access token (the same shape the webapp already sends
to other LNbits endpoints). The path param must match the token-
bound user.id — users can only enumerate their own tickets, not
anyone else's by ID-guessing.

Returns full `Ticket` rows rather than `PublicTicket` because the
owner needs the payment_hash (for the QR) + the `extra` envelope
(for refund / promo / notification state) in My Tickets.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

views_api.py

@@ -14,11 +14,12 @@ from fastapi import (
 )
 from lnbits.core.crud import get_user
 from lnbits.core.crud.wallets import get_wallet
-from lnbits.core.models import Account, WalletTypeInfo
+from lnbits.core.models import Account, User, WalletTypeInfo
 from lnbits.core.models.payments import CreateInvoice
 from lnbits.core.services import create_payment_request
 from lnbits.decorators import (
     check_admin,
+    check_user_exists,
     require_admin_key,
     require_invoice_key,
 )
@@ -45,6 +46,7 @@ from .crud import (
     get_settings,
     get_ticket,
     get_tickets,
+    get_tickets_by_user_id,
     purge_unpaid_tickets,
     update_event,
     update_settings,
@@ -399,6 +401,27 @@ async def api_tickets(
     return await get_tickets(wallet_ids)
 
 
+@tickets_api_router.get("/user/{user_id}")
+async def api_tickets_by_user(
+    user_id: str,
+    user: User = Depends(check_user_exists),
+) -> list[Ticket]:
+    """All tickets for the authenticated user.
+
+    The `user_id` path param must match the token-bound user so a
+    Bearer-authenticated session can only enumerate its own tickets.
+    Returns full `Ticket` rows (not `PublicTicket`) since the owner
+    needs the payment_hash to render the QR + the `extra` envelope
+    to surface payment/refund state in My Tickets.
+    """
+    if user_id != user.id:
+        raise HTTPException(
+            status_code=HTTPStatus.FORBIDDEN,
+            detail="Can only fetch your own tickets.",
+        )
+    return await get_tickets_by_user_id(user_id)
+
+
 @tickets_api_router.get("/{ticket_id}", response_model=PublicTicket)
 async def api_get_ticket(ticket_id: str) -> Ticket:
     ticket = await get_ticket(ticket_id)