Auto-mount defpages: eliminate Python route stubs across all 9 services

Defpages are now declared with absolute paths in .sx files and auto-mounted
directly on the Quart app, removing ~850 lines of blueprint mount_pages calls,
before_request hooks, and g.* wrapper boilerplate. A new page = one defpage
declaration, nothing else.

Infrastructure:
- async_eval awaits coroutine results from callable dispatch
- auto_mount_pages() mounts all registered defpages on the app
- g._defpage_ctx pattern passes helper data to layout context

Migrated: sx, account, orders, federation, cart, market, events, blog

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

events/bp/ticket_admin/routes.py

@@ -14,10 +14,10 @@ import logging
 from quart import (
     Blueprint, g, request, make_response,
 )
-from sqlalchemy import select, func
+from sqlalchemy import select
 from sqlalchemy.orm import selectinload
 
-from models.calendars import CalendarEntry, Ticket, TicketType
+from models.calendars import CalendarEntry
 from shared.browser.app.authz import require_admin
 from shared.browser.app.redis_cacher import clear_cache
 from shared.sx.helpers import sx_response
@@ -34,46 +34,6 @@ logger = logging.getLogger(__name__)
 def register() -> Blueprint:
     bp = Blueprint("ticket_admin", __name__, url_prefix="/admin/tickets")
 
-    @bp.before_request
-    async def _prepare_page_data():
-        if "defpage_" not in (request.endpoint or ""):
-            return
-        # Get recent tickets
-        result = await g.s.execute(
-            select(Ticket)
-            .options(
-                selectinload(Ticket.entry).selectinload(CalendarEntry.calendar),
-                selectinload(Ticket.ticket_type),
-            )
-            .order_by(Ticket.created_at.desc())
-            .limit(50)
-        )
-        tickets = result.scalars().all()
-
-        # Stats
-        total = await g.s.scalar(select(func.count(Ticket.id)))
-        confirmed = await g.s.scalar(
-            select(func.count(Ticket.id)).where(Ticket.state == "confirmed")
-        )
-        checked_in = await g.s.scalar(
-            select(func.count(Ticket.id)).where(Ticket.state == "checked_in")
-        )
-        reserved = await g.s.scalar(
-            select(func.count(Ticket.id)).where(Ticket.state == "reserved")
-        )
-
-        stats = {
-            "total": total or 0,
-            "confirmed": confirmed or 0,
-            "checked_in": checked_in or 0,
-            "reserved": reserved or 0,
-        }
-
-        from shared.sx.page import get_template_context
-        from sx.sx_components import _ticket_admin_main_panel_html
-        ctx = await get_template_context()
-        g.ticket_admin_content = _ticket_admin_main_panel_html(ctx, tickets, stats)
-
     @bp.get("/entry/<int:entry_id>/")
     @require_admin
     async def entry_tickets(entry_id: int):