Replace 21 Jinja render_template() calls with sx render functions

Phase 1: Wire 16 events routes to existing sx render functions
- slot, slots, ticket_types, ticket_type, calendar_entries,
  calendar_entry, calendar_entry/admin

Phase 2: Orders checkout return (2 calls)
- New orders/sx/checkout.sx with return page components
- New render_checkout_return_page() in orders/sx/sx_components.py

Phase 3: Blog menu items (3 calls)
- New blog/sx/menu_items.sx with search result components
- New render_menu_item_form() and render_page_search_results()
  in blog/sx/sx_components.py

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

events/bp/calendar_entry/routes.py

@@ -256,8 +256,23 @@ def register():
     @bp.get("/edit/")
     @require_admin
     async def get_edit(entry_id: int, **rest):
-        html = await render_template("_types/entry/_edit.html")
-        return await make_response(html, 200)
+        from datetime import date as date_cls
+        va = request.view_args or {}
+        day, month, year = va.get("day"), va.get("month"), va.get("year")
+
+        # Query day slots for this weekday
+        day_date = date_cls(year, month, day)
+        weekday_attr = ["mon","tue","wed","thu","fri","sat","sun"][day_date.weekday()]
+        stmt = select(CalendarSlot).where(
+            CalendarSlot.calendar_id == g.calendar.id,
+            getattr(CalendarSlot, weekday_attr) == True,
+            CalendarSlot.deleted_at.is_(None),
+        ).order_by(CalendarSlot.time_start.asc(), CalendarSlot.id.asc())
+        result = await g.s.execute(stmt)
+        day_slots = list(result.scalars())
+
+        from sx.sx_components import render_entry_edit_form
+        return sx_response(render_entry_edit_form(g.entry, g.calendar, day, month, year, day_slots))
 
     @bp.put("/")
     @require_admin
@@ -557,14 +572,13 @@ def register():
         search_posts, total = await svc_search_posts(g.s, query, page, per_page)
         total_pages = math.ceil(total / per_page) if total > 0 else 0
 
-        html = await render_template(
-            "_types/entry/_post_search_results.html",
-            search_posts=search_posts,
-            search_query=query,
-            page=page,
-            total_pages=total_pages,
-        )
-        return await make_response(html, 200)
+        va = request.view_args or {}
+        from sx.sx_components import render_post_search_results
+        return sx_response(render_post_search_results(
+            search_posts, query, page, total_pages,
+            g.entry, g.calendar,
+            va.get("day"), va.get("month"), va.get("year"),
+        ))
 
     @bp.post("/posts/")
     @require_admin