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/bp/all_markets/routes.py

@@ -41,19 +41,6 @@ async def _load_markets(page, per_page=20):
 def register() -> Blueprint:
     bp = Blueprint("all_markets", __name__)
 
-    @bp.before_request
-    async def _prepare_page_data():
-        """Load all-markets data for defpage routes."""
-        endpoint = request.endpoint or ""
-        if not endpoint.endswith("defpage_all_markets_index"):
-            return
-        page = int(request.args.get("page", 1))
-        markets, has_more, page_info = await _load_markets(page)
-        g.all_markets_data = {
-            "markets": markets, "has_more": has_more,
-            "page_info": page_info, "page": page,
-        }
-
     @bp.get("/all-markets")
     async def markets_fragment():
         page = int(request.args.get("page", 1))

market/bp/browse/routes.py

@@ -29,10 +29,6 @@ def register():
     register_product(),
   )
 
-  # Mount defpage for market home (GET /)
-  from shared.sx.pages import mount_pages
-  mount_pages(browse_bp, "market", names=["market-home"])
-
   @browse_bp.get("/all/")
   @cache_page(tag="browse")
   async def browse_all():

market/bp/market/admin/routes.py

@@ -5,9 +5,4 @@ from quart import Blueprint
 
 def register():
     bp = Blueprint("admin", __name__, url_prefix='/admin')
-
-    # Mount defpage for market admin (GET /)
-    from shared.sx.pages import mount_pages
-    mount_pages(bp, "market", names=["market-admin"])
-
     return bp

market/bp/market/routes.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from quart import Blueprint, g, render_template, make_response, url_for
+from quart import Blueprint, g, make_response, url_for
 
 
 from ..browse.routes import register as register_browse_bp

market/bp/page_admin/routes.py

@@ -26,17 +26,6 @@ def _slugify(value: str, max_len: int = 255) -> str:
 def register():
     bp = Blueprint("page_admin", __name__)
 
-    @bp.before_request
-    async def _prepare_page_data():
-        """Pre-render page admin content for defpage (async helper)."""
-        endpoint = request.endpoint or ""
-        if request.method != "GET" or not endpoint.endswith("defpage_page_admin"):
-            return
-        from shared.sx.page import get_template_context
-        from sx.sx_components import _markets_admin_panel_sx
-        ctx = await get_template_context()
-        g.page_admin_content = await _markets_admin_panel_sx(ctx)
-
     @bp.post("/new/")
     @require_admin
     async def create_market(**kwargs):

market/bp/page_markets/routes.py

@@ -23,20 +23,6 @@ async def _load_markets(post_id, page, per_page=20):
 def register() -> Blueprint:
     bp = Blueprint("page_markets", __name__)
 
-    @bp.before_request
-    async def _prepare_page_data():
-        """Load page-markets data for defpage routes."""
-        endpoint = request.endpoint or ""
-        if not endpoint.endswith("defpage_page_markets_index"):
-            return
-        post = g.post_data["post"]
-        page = int(request.args.get("page", 1))
-        markets, has_more = await _load_markets(post["id"], page)
-        g.page_markets_data = {
-            "markets": markets, "has_more": has_more,
-            "page": page, "post_slug": post.get("slug", ""),
-        }
-
     @bp.get("/page-markets")
     async def markets_fragment():
         post = g.post_data["post"]