Remove render_to_sx from public API: enforce sx_call for all service code

Replace ~250 render_to_sx calls across all services with sync sx_call,
converting many async functions to sync where no other awaits remained.
Make render_to_sx/render_to_sx_with_env private (_render_to_sx).
Add (post-header-ctx) IO primitive and shared post/post-admin defmacros.
Convert built-in post/post-admin layouts from Python to register_sx_layout
with .sx defcomps. Remove dead post_admin_mobile_nav_sx.

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

federation/bp/auth/routes.py

@@ -44,11 +44,11 @@ ALLOWED_CLIENTS = {"blog", "market", "cart", "events", "account"}
 
 async def _render_social_auth_page(component: str, title: str, **kwargs) -> str:
     """Render an auth page with social layout — replaces sx_components helpers."""
-    from shared.sx.helpers import render_to_sx
+    from shared.sx.helpers import sx_call
     from shared.sx.page import get_template_context
     from sxc.pages.utils import _social_page
     ctx = await get_template_context()
-    content = await render_to_sx(component, **{k: v for k, v in kwargs.items() if v})
+    content = sx_call(component, **{k: v for k, v in kwargs.items() if v})
     return await _social_page(ctx, None, content=content, title=title)
 
 

federation/bp/identity/routes.py

@@ -30,7 +30,7 @@ async def _render_choose_username(*, actor=None, error="", username=""):
     """Render choose-username page — replaces sx_components helper."""
     from shared.browser.app.csrf import generate_csrf_token
     from shared.config import config
-    from shared.sx.helpers import render_to_sx
+    from shared.sx.helpers import sx_call
     from shared.sx.parser import SxExpr
     from shared.sx.page import get_template_context
     from sxc.pages.utils import _social_page
@@ -41,8 +41,8 @@ async def _render_choose_username(*, actor=None, error="", username=""):
     ap_domain = config().get("ap_domain", "rose-ash.com")
     check_url = url_for("identity.check_username")
 
-    error_sx = await render_to_sx("auth-error-banner", error=error) if error else ""
-    content = await render_to_sx(
+    error_sx = sx_call("auth-error-banner", error=error) if error else ""
+    content = sx_call(
         "federation-choose-username",
         domain=str(escape(ap_domain)),
         error=SxExpr(error_sx) if error_sx else None,

federation/bp/social/routes.py

@@ -7,7 +7,7 @@ from datetime import datetime
 from quart import Blueprint, request, g, redirect, url_for, abort, Response
 
 from shared.services.registry import services
-from shared.sx.helpers import sx_response, render_to_sx
+from shared.sx.helpers import sx_response, sx_call
 
 log = logging.getLogger(__name__)
 
@@ -47,7 +47,7 @@ def register(url_prefix="/social"):
         items = await services.federation.get_home_timeline(
             g.s, actor.id, before=before,
         )
-        sx_src = await _render_timeline_items(items, "home", actor)
+        sx_src = _render_timeline_items(items, "home", actor)
         return sx_response(sx_src)
 
     @bp.get("/public/timeline")
@@ -61,7 +61,7 @@ def register(url_prefix="/social"):
                 pass
         items = await services.federation.get_public_timeline(g.s, before=before)
         actor = getattr(g, "_social_actor", None)
-        sx_src = await _render_timeline_items(items, "public", actor)
+        sx_src = _render_timeline_items(items, "public", actor)
         return sx_response(sx_src)
 
     # -- Compose ---------------------------------------------------------------
@@ -117,12 +117,12 @@ def register(url_prefix="/social"):
         actor_data = _serialize_actor(actor)
         parts = []
         for ad in actor_dicts:
-            parts.append(await render_to_sx("federation-actor-card-from-data",
+            parts.append(sx_call("federation-actor-card-from-data",
                 a=ad, actor=actor_data,
                 followed_urls=list(followed_urls), list_type="search"))
         if len(actors_list) >= 20:
             next_url = url_for("social.search_page", q=query, page=page + 1)
-            parts.append(await render_to_sx("federation-scroll-sentinel", url=next_url))
+            parts.append(sx_call("federation-scroll-sentinel", url=next_url))
         sx_src = "(<> " + " ".join(parts) + ")" if parts else ""
         return sx_response(sx_src)
 
@@ -166,7 +166,7 @@ def register(url_prefix="/social"):
         list_type = "followers" if "/followers" in referer else "following"
         actor_data = _serialize_actor(actor)
         ad = _serialize_remote_actor(remote_dto)
-        return sx_response(await render_to_sx("federation-actor-card-from-data",
+        return sx_response(sx_call("federation-actor-card-from-data",
             a=ad, actor=actor_data,
             followed_urls=list(followed_urls), list_type=list_type))
 
@@ -277,19 +277,19 @@ def register(url_prefix="/social"):
             boost_cls = "hover:text-green-600"
 
         reply_url = url_for("social.defpage_compose_form", reply_to=object_id) if object_id else ""
-        reply_sx = await render_to_sx("federation-reply-link", url=reply_url) if reply_url else ""
+        reply_sx = sx_call("federation-reply-link", url=reply_url) if reply_url else ""
 
-        like_form = await render_to_sx("federation-like-form",
+        like_form = sx_call("federation-like-form",
             action=like_action, target=target, oid=object_id, ainbox=author_inbox,
             csrf=csrf, cls=f"flex items-center gap-1 {like_cls}",
             icon=like_icon, count=str(like_count))
 
-        boost_form = await render_to_sx("federation-boost-form",
+        boost_form = sx_call("federation-boost-form",
             action=boost_action, target=target, oid=object_id, ainbox=author_inbox,
             csrf=csrf, cls=f"flex items-center gap-1 {boost_cls}",
             count=str(boost_count))
 
-        return sx_response(await render_to_sx("federation-interaction-buttons",
+        return sx_response(sx_call("federation-interaction-buttons",
             like=SxExpr(like_form),
             boost=SxExpr(boost_form),
             reply=SxExpr(reply_sx) if reply_sx else None))
@@ -309,12 +309,12 @@ def register(url_prefix="/social"):
         actor_data = _serialize_actor(actor)
         parts = []
         for ad in actor_dicts:
-            parts.append(await render_to_sx("federation-actor-card-from-data",
+            parts.append(sx_call("federation-actor-card-from-data",
                 a=ad, actor=actor_data,
                 followed_urls=[], list_type="following"))
         if len(actors_list) >= 20:
             next_url = url_for("social.following_list_page", page=page + 1)
-            parts.append(await render_to_sx("federation-scroll-sentinel", url=next_url))
+            parts.append(sx_call("federation-scroll-sentinel", url=next_url))
         sx_src = "(<> " + " ".join(parts) + ")" if parts else ""
         return sx_response(sx_src)
 
@@ -335,12 +335,12 @@ def register(url_prefix="/social"):
         actor_data = _serialize_actor(actor)
         parts = []
         for ad in actor_dicts:
-            parts.append(await render_to_sx("federation-actor-card-from-data",
+            parts.append(sx_call("federation-actor-card-from-data",
                 a=ad, actor=actor_data,
                 followed_urls=list(followed_urls), list_type="followers"))
         if len(actors_list) >= 20:
             next_url = url_for("social.followers_list_page", page=page + 1)
-            parts.append(await render_to_sx("federation-scroll-sentinel", url=next_url))
+            parts.append(sx_call("federation-scroll-sentinel", url=next_url))
         sx_src = "(<> " + " ".join(parts) + ")" if parts else ""
         return sx_response(sx_src)
 
@@ -357,7 +357,7 @@ def register(url_prefix="/social"):
         items = await services.federation.get_actor_timeline(
             g.s, id, before=before,
         )
-        sx_src = await _render_timeline_items(items, "actor", actor, id)
+        sx_src = _render_timeline_items(items, "actor", actor, id)
         return sx_response(sx_src)
 
     # -- Notifications ---------------------------------------------------------
@@ -385,7 +385,7 @@ def register(url_prefix="/social"):
     return bp
 
 
-async def _render_timeline_items(items, timeline_type, actor, actor_id=None):
+def _render_timeline_items(items, timeline_type, actor, actor_id=None):
     """Render timeline pagination items as SX fragment."""
     from sxc.pages.utils import _serialize_timeline_item, _serialize_actor
 
@@ -401,7 +401,7 @@ async def _render_timeline_items(items, timeline_type, actor, actor_id=None):
         else:
             next_url = url_for(f"social.{timeline_type}_timeline_page", before=before)
 
-    return await render_to_sx("federation-timeline-items",
+    return sx_call("federation-timeline-items",
         items=item_dicts,
         timeline_type=timeline_type,
         actor=actor_data,