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>

blog/bp/post/admin/routes.py

@@ -10,7 +10,6 @@ from quart import (
     url_for,
 )
 from shared.browser.app.authz import require_admin, require_post_author
-from shared.browser.app.utils.htmx import is_htmx_request
 from shared.sx.helpers import sx_response
 from shared.utils import host_url
 
@@ -55,155 +54,6 @@ def _post_to_edit_dict(post) -> dict:
 def register():
   bp = Blueprint("admin", __name__, url_prefix='/admin')
 
-  @bp.before_request
-  async def _prepare_page_data():
-      ep = request.endpoint or ""
-      if "defpage_post_admin" in ep:
-          from sqlalchemy import select
-          from shared.models.page_config import PageConfig
-          post = (g.post_data or {}).get("post", {})
-          features = {}
-          sumup_configured = False
-          sumup_merchant_code = ""
-          sumup_checkout_prefix = ""
-          if post.get("is_page"):
-              pc = (await g.s.execute(
-                  select(PageConfig).where(
-                      PageConfig.container_type == "page",
-                      PageConfig.container_id == post["id"],
-                  )
-              )).scalar_one_or_none()
-              if pc:
-                  features = pc.features or {}
-                  sumup_configured = bool(pc.sumup_api_key)
-                  sumup_merchant_code = pc.sumup_merchant_code or ""
-                  sumup_checkout_prefix = pc.sumup_checkout_prefix or ""
-          from shared.sx.page import get_template_context
-          from sx.sx_components import _post_admin_main_panel_sx
-          tctx = await get_template_context()
-          tctx.update({
-              "features": features,
-              "sumup_configured": sumup_configured,
-              "sumup_merchant_code": sumup_merchant_code,
-              "sumup_checkout_prefix": sumup_checkout_prefix,
-          })
-          g.post_admin_content = _post_admin_main_panel_sx(tctx)
-
-      elif "defpage_post_data" in ep:
-          from shared.sx.page import get_template_context
-          from sx.sx_components import _post_data_content_sx
-          tctx = await get_template_context()
-          g.post_data_content = _post_data_content_sx(tctx)
-
-      elif "defpage_post_preview" in ep:
-          from models.ghost_content import Post
-          from sqlalchemy import select as sa_select
-          post_id = g.post_data["post"]["id"]
-          post = (await g.s.execute(
-              sa_select(Post).where(Post.id == post_id)
-          )).scalar_one_or_none()
-          preview_ctx = {}
-          sx_content = getattr(post, "sx_content", None) or ""
-          if sx_content:
-              from shared.sx.prettify import sx_to_pretty_sx
-              preview_ctx["sx_pretty"] = sx_to_pretty_sx(sx_content)
-          lexical_raw = getattr(post, "lexical", None) or ""
-          if lexical_raw:
-              from shared.sx.prettify import json_to_pretty_sx
-              preview_ctx["json_pretty"] = json_to_pretty_sx(lexical_raw)
-          if sx_content:
-              from shared.sx.parser import parse as sx_parse
-              from shared.sx.html import render as sx_html_render
-              from shared.sx.jinja_bridge import _COMPONENT_ENV
-              try:
-                  parsed = sx_parse(sx_content)
-                  preview_ctx["sx_rendered"] = sx_html_render(parsed, dict(_COMPONENT_ENV))
-              except Exception:
-                  preview_ctx["sx_rendered"] = "<em>Error rendering sx</em>"
-          if lexical_raw:
-              from bp.blog.ghost.lexical_renderer import render_lexical
-              try:
-                  preview_ctx["lex_rendered"] = render_lexical(lexical_raw)
-              except Exception:
-                  preview_ctx["lex_rendered"] = "<em>Error rendering lexical</em>"
-          from shared.sx.page import get_template_context
-          from sx.sx_components import _preview_main_panel_sx
-          tctx = await get_template_context()
-          tctx.update(preview_ctx)
-          g.post_preview_content = _preview_main_panel_sx(tctx)
-
-      elif "defpage_post_entries" in ep:
-          from sqlalchemy import select
-          from shared.models.calendars import Calendar
-          from ..services.entry_associations import get_post_entry_ids
-          post_id = g.post_data["post"]["id"]
-          associated_entry_ids = await get_post_entry_ids(post_id)
-          result = await g.s.execute(
-              select(Calendar)
-              .where(Calendar.deleted_at.is_(None))
-              .order_by(Calendar.name.asc())
-          )
-          all_calendars = result.scalars().all()
-          for calendar in all_calendars:
-              await g.s.refresh(calendar, ["entries", "post"])
-          from shared.sx.page import get_template_context
-          from sx.sx_components import _post_entries_content_sx
-          tctx = await get_template_context()
-          tctx["all_calendars"] = all_calendars
-          tctx["associated_entry_ids"] = associated_entry_ids
-          g.post_entries_content = _post_entries_content_sx(tctx)
-
-      elif "defpage_post_settings" in ep:
-          from models.ghost_content import Post
-          from sqlalchemy import select as sa_select
-          from sqlalchemy.orm import selectinload
-          post_id = g.post_data["post"]["id"]
-          post = (await g.s.execute(
-              sa_select(Post)
-              .where(Post.id == post_id)
-              .options(selectinload(Post.tags))
-          )).scalar_one_or_none()
-          ghost_post = _post_to_edit_dict(post) if post else {}
-          save_success = request.args.get("saved") == "1"
-          from shared.sx.page import get_template_context
-          from sx.sx_components import _post_settings_content_sx
-          tctx = await get_template_context()
-          tctx["ghost_post"] = ghost_post
-          tctx["save_success"] = save_success
-          g.post_settings_content = _post_settings_content_sx(tctx)
-
-      elif "defpage_post_edit" in ep:
-          from models.ghost_content import Post
-          from sqlalchemy import select as sa_select
-          from sqlalchemy.orm import selectinload
-          from shared.infrastructure.data_client import fetch_data
-          post_id = g.post_data["post"]["id"]
-          post = (await g.s.execute(
-              sa_select(Post)
-              .where(Post.id == post_id)
-              .options(selectinload(Post.tags))
-          )).scalar_one_or_none()
-          ghost_post = _post_to_edit_dict(post) if post else {}
-          save_success = request.args.get("saved") == "1"
-          save_error = request.args.get("error", "")
-          raw_newsletters = await fetch_data("account", "newsletters", required=False) or []
-          from types import SimpleNamespace
-          newsletters = [SimpleNamespace(**nl) for nl in raw_newsletters]
-          from shared.sx.page import get_template_context
-          from sx.sx_components import _post_edit_content_sx
-          tctx = await get_template_context()
-          tctx["ghost_post"] = ghost_post
-          tctx["save_success"] = save_success
-          tctx["save_error"] = save_error
-          tctx["newsletters"] = newsletters
-          g.post_edit_content = _post_edit_content_sx(tctx)
-
-  from shared.sx.pages import mount_pages
-  mount_pages(bp, "blog", names=[
-      "post-admin", "post-data", "post-preview",
-      "post-entries", "post-settings", "post-edit",
-  ])
-
   @bp.put("/features/")
   @require_admin
   async def update_features(slug: str):
@@ -468,7 +318,7 @@ def register():
     except OptimisticLockError:
         from urllib.parse import quote
         return redirect(
-            host_url(url_for("blog.post.admin.defpage_post_settings", slug=slug))
+            host_url(url_for("defpage_post_settings", slug=slug))
             + "?error=" + quote("Someone else edited this post. Please reload and try again.")
         )
 
@@ -479,7 +329,7 @@ def register():
     await invalidate_tag_cache("post.post_detail")
 
     # Redirect using the (possibly new) slug
-    return redirect(host_url(url_for("blog.post.admin.defpage_post_settings", slug=post.slug)) + "?saved=1")
+    return redirect(host_url(url_for("defpage_post_settings", slug=post.slug)) + "?saved=1")
 
   @bp.post("/edit/")
   @require_post_author
@@ -504,11 +354,11 @@ def register():
     try:
       lexical_doc = json.loads(lexical_raw)
     except (json.JSONDecodeError, TypeError):
-      return redirect(host_url(url_for("blog.post.admin.defpage_post_edit", slug=slug)) + "?error=" + quote("Invalid JSON in editor content."))
+      return redirect(host_url(url_for("defpage_post_edit", slug=slug)) + "?error=" + quote("Invalid JSON in editor content."))
 
     ok, reason = validate_lexical(lexical_doc)
     if not ok:
-      return redirect(host_url(url_for("blog.post.admin.defpage_post_edit", slug=slug)) + "?error=" + quote(reason))
+      return redirect(host_url(url_for("defpage_post_edit", slug=slug)) + "?error=" + quote(reason))
 
     # Publish workflow
     is_admin = bool((g.get("rights") or {}).get("admin"))
@@ -544,7 +394,7 @@ def register():
       )
     except OptimisticLockError:
       return redirect(
-          host_url(url_for("blog.post.admin.defpage_post_edit", slug=slug))
+          host_url(url_for("defpage_post_edit", slug=slug))
           + "?error=" + quote("Someone else edited this post. Please reload and try again.")
       )
 
@@ -560,7 +410,7 @@ def register():
     await invalidate_tag_cache("post.post_detail")
 
     # Redirect to GET (PRG pattern) — use post.slug in case it changed
-    redirect_url = host_url(url_for("blog.post.admin.defpage_post_edit", slug=post.slug)) + "?saved=1"
+    redirect_url = host_url(url_for("defpage_post_edit", slug=post.slug)) + "?saved=1"
     if publish_requested_msg:
         redirect_url += "&publish_requested=1"
     return redirect(redirect_url)