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>

market/sxc/pages/__init__.py

@@ -98,67 +98,77 @@ def _register_market_helpers() -> None:
     })
 
 
-def _h_all_markets_content():
+async def _h_all_markets_content(**kw):
     from quart import g, url_for, request
     from shared.utils import route_prefix
+    from shared.services.registry import services
+    from shared.infrastructure.data_client import fetch_data
+    from shared.contracts.dtos import PostDTO, dto_from_dict
 
-    data = getattr(g, "all_markets_data", None)
-    if not data:
+    page = int(request.args.get("page", 1))
+    markets, has_more = await services.market.list_marketplaces(
+        g.s, page=page, per_page=20,
+    )
+
+    page_info = {}
+    if markets:
+        post_ids = list({m.container_id for m in markets if m.container_type == "page"})
+        if post_ids:
+            raw_posts = await fetch_data("blog", "posts-by-ids",
+                                         params={"ids": ",".join(str(i) for i in post_ids)},
+                                         required=False) or []
+            for raw_p in raw_posts:
+                p = dto_from_dict(PostDTO, raw_p)
+                page_info[p.id] = {"title": p.title, "slug": p.slug}
+
+    if not markets:
         from sx.sx_components import _no_markets_sx
         return _no_markets_sx()
 
-    markets = data["markets"]
-    has_more = data["has_more"]
-    page_info = data["page_info"]
-    page = data["page"]
-
     prefix = route_prefix()
     next_url = prefix + url_for("all_markets.markets_fragment", page=page + 1)
 
-    from sx.sx_components import _market_cards_sx, _markets_grid, _no_markets_sx
-    if markets:
-        cards = _market_cards_sx(markets, page_info, page, has_more, next_url)
-        content = _markets_grid(cards)
-    else:
-        content = _no_markets_sx()
+    from sx.sx_components import _market_cards_sx, _markets_grid
+    cards = _market_cards_sx(markets, page_info, page, has_more, next_url)
+    content = _markets_grid(cards)
     return "(<> " + content + " " + '(div :class "pb-8")' + ")"
 
 
-def _h_page_markets_content():
-    from quart import g, url_for
+async def _h_page_markets_content(slug=None, **kw):
+    from quart import g, url_for, request
     from shared.utils import route_prefix
+    from shared.services.registry import services
 
-    data = getattr(g, "page_markets_data", None)
-    if not data:
+    post = g.post_data["post"]
+    page = int(request.args.get("page", 1))
+    markets, has_more = await services.market.list_marketplaces(
+        g.s, "page", post["id"], page=page, per_page=20,
+    )
+    post_slug = post.get("slug", "")
+
+    if not markets:
         from sx.sx_components import _no_markets_sx
         return _no_markets_sx("No markets for this page")
 
-    markets = data["markets"]
-    has_more = data["has_more"]
-    page = data["page"]
-    post_slug = data.get("post_slug", "")
-
     prefix = route_prefix()
     next_url = prefix + url_for("page_markets.markets_fragment", page=page + 1)
 
-    from sx.sx_components import _market_cards_sx, _markets_grid, _no_markets_sx
-    if markets:
-        cards = _market_cards_sx(markets, {}, page, has_more, next_url,
-                                    show_page_badge=False, post_slug=post_slug)
-        content = _markets_grid(cards)
-    else:
-        content = _no_markets_sx("No markets for this page")
+    from sx.sx_components import _market_cards_sx, _markets_grid
+    cards = _market_cards_sx(markets, {}, page, has_more, next_url,
+                                show_page_badge=False, post_slug=post_slug)
+    content = _markets_grid(cards)
     return "(<> " + content + " " + '(div :class "pb-8")' + ")"
 
 
-def _h_page_admin_content():
-    # Content pre-rendered by before_request (async _markets_admin_panel_sx)
-    from quart import g
-    content = getattr(g, "page_admin_content", "")
+async def _h_page_admin_content(slug=None, **kw):
+    from shared.sx.page import get_template_context
+    from sx.sx_components import _markets_admin_panel_sx
+    ctx = await get_template_context()
+    content = await _markets_admin_panel_sx(ctx)
     return '(div :id "main-panel" ' + content + ')'
 
 
-def _h_market_home_content():
+def _h_market_home_content(page_slug=None, market_slug=None, **kw):
     from quart import g
     post_data = getattr(g, "post_data", {})
     post = post_data.get("post", {})
@@ -166,5 +176,5 @@ def _h_market_home_content():
     return _market_landing_content_sx(post)
 
 
-def _h_market_admin_content():
+def _h_market_admin_content(page_slug=None, market_slug=None, **kw):
     return '"market admin"'