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>

blog/sxc/pages/layouts.py

@@ -5,19 +5,19 @@ from typing import Any
 
 
 # ---------------------------------------------------------------------------
-# Header helpers (moved from sx_components — thin render_to_sx wrappers)
+# Header helpers (moved from sx_components — thin sx_call wrappers)
 # ---------------------------------------------------------------------------
 
-async def _settings_header_sx(ctx: dict, *, oob: bool = False) -> str:
-    from shared.sx.helpers import render_to_sx
+def _settings_header_sx(ctx: dict, *, oob: bool = False) -> str:
+    from shared.sx.helpers import sx_call
     from shared.sx.parser import SxExpr
     from quart import url_for as qurl
 
     settings_href = qurl("settings.defpage_settings_home")
-    label_sx = await render_to_sx("blog-admin-label")
-    nav_sx = await _settings_nav_sx(ctx)
+    label_sx = sx_call("blog-admin-label")
+    nav_sx = _settings_nav_sx(ctx)
 
-    return await render_to_sx("menu-row-sx",
+    return sx_call("menu-row-sx",
         id="root-settings-row", level=1,
         link_href=settings_href,
         link_label_content=SxExpr(label_sx),
@@ -25,20 +25,20 @@ async def _settings_header_sx(ctx: dict, *, oob: bool = False) -> str:
         child_id="root-settings-header-child", oob=oob)
 
 
-async def _settings_nav_sx(ctx: dict) -> str:
-    from shared.sx.helpers import render_to_sx
-    return await render_to_sx("blog-settings-nav")
+def _settings_nav_sx(ctx: dict) -> str:
+    from shared.sx.helpers import sx_call
+    return sx_call("blog-settings-nav")
 
 
-async def _sub_settings_header_sx(row_id: str, child_id: str, href: str,
-                                  icon: str, label: str, ctx: dict,
-                                  *, oob: bool = False, nav_sx: str = "") -> str:
-    from shared.sx.helpers import render_to_sx
+def _sub_settings_header_sx(row_id: str, child_id: str, href: str,
+                             icon: str, label: str, ctx: dict,
+                             *, oob: bool = False, nav_sx: str = "") -> str:
+    from shared.sx.helpers import sx_call
     from shared.sx.parser import SxExpr
 
-    label_sx = await render_to_sx("blog-sub-settings-label",
+    label_sx = sx_call("blog-sub-settings-label",
         icon=f"fa fa-{icon}", label=label)
-    return await render_to_sx("menu-row-sx",
+    return sx_call("menu-row-sx",
         id=row_id, level=2,
         link_href=href,
         link_label_content=SxExpr(label_sx),
@@ -82,19 +82,19 @@ async def _settings_full(ctx: dict, **kw: Any) -> str:
     from shared.sx.helpers import render_to_sx_with_env
     from shared.sx.parser import SxExpr
     return await render_to_sx_with_env("settings-layout-full", {},
-        settings_header=SxExpr(await _settings_header_sx(ctx)))
+        settings_header=SxExpr(_settings_header_sx(ctx)))
 
 
 async def _settings_oob(ctx: dict, **kw: Any) -> str:
     from shared.sx.helpers import render_to_sx_with_env, oob_header_sx
     from shared.sx.parser import SxExpr
     rows = await render_to_sx_with_env("settings-layout-full", {},
-        settings_header=SxExpr(await _settings_header_sx(ctx)))
+        settings_header=SxExpr(_settings_header_sx(ctx)))
     return await oob_header_sx("root-header-child", "root-settings-header-child", rows)
 
 
-async def _settings_mobile(ctx: dict, **kw: Any) -> str:
-    return await _settings_nav_sx(ctx)
+def _settings_mobile(ctx: dict, **kw: Any) -> str:
+    return _settings_nav_sx(ctx)
 
 
 # --- Sub-settings helpers ---
@@ -105,21 +105,21 @@ async def _sub_settings_full(ctx: dict, row_id: str, child_id: str,
     from shared.sx.parser import SxExpr
     from quart import url_for as qurl
     return await render_to_sx_with_env("sub-settings-layout-full", {},
-        settings_header=SxExpr(await _settings_header_sx(ctx)),
-        sub_header=SxExpr(await _sub_settings_header_sx(
+        settings_header=SxExpr(_settings_header_sx(ctx)),
+        sub_header=SxExpr(_sub_settings_header_sx(
             row_id, child_id, qurl(endpoint), icon, label, ctx)))
 
 
 async def _sub_settings_oob(ctx: dict, row_id: str, child_id: str,
                       endpoint: str, icon: str, label: str) -> str:
-    from shared.sx.helpers import oob_header_sx, render_to_sx
+    from shared.sx.helpers import oob_header_sx, sx_call
     from shared.sx.parser import SxExpr
     from quart import url_for as qurl
-    settings_hdr_oob = await _settings_header_sx(ctx, oob=True)
-    sub_hdr = await _sub_settings_header_sx(
+    settings_hdr_oob = _settings_header_sx(ctx, oob=True)
+    sub_hdr = _sub_settings_header_sx(
         row_id, child_id, qurl(endpoint), icon, label, ctx)
     sub_oob = await oob_header_sx("root-settings-header-child", child_id, sub_hdr)
-    return await render_to_sx("sub-settings-layout-oob",
+    return sx_call("sub-settings-layout-oob",
         settings_header_oob=SxExpr(settings_hdr_oob),
         sub_header_oob=SxExpr(sub_oob))
 
@@ -180,8 +180,8 @@ async def _tag_group_edit_full(ctx: dict, **kw: Any) -> str:
     from shared.sx.parser import SxExpr
     g_id = (request.view_args or {}).get("id")
     return await render_to_sx_with_env("sub-settings-layout-full", {},
-        settings_header=SxExpr(await _settings_header_sx(ctx)),
-        sub_header=SxExpr(await _sub_settings_header_sx(
+        settings_header=SxExpr(_settings_header_sx(ctx)),
+        sub_header=SxExpr(_sub_settings_header_sx(
             "tag-groups-row", "tag-groups-header-child",
             qurl("defpage_tag_group_edit", id=g_id),
             "tags", "Tag Groups", ctx)))
@@ -189,15 +189,15 @@ async def _tag_group_edit_full(ctx: dict, **kw: Any) -> str:
 
 async def _tag_group_edit_oob(ctx: dict, **kw: Any) -> str:
     from quart import request, url_for as qurl
-    from shared.sx.helpers import oob_header_sx, render_to_sx
+    from shared.sx.helpers import oob_header_sx, sx_call
     from shared.sx.parser import SxExpr
     g_id = (request.view_args or {}).get("id")
-    settings_hdr_oob = await _settings_header_sx(ctx, oob=True)
-    sub_hdr = await _sub_settings_header_sx(
+    settings_hdr_oob = _settings_header_sx(ctx, oob=True)
+    sub_hdr = _sub_settings_header_sx(
         "tag-groups-row", "tag-groups-header-child",
         qurl("defpage_tag_group_edit", id=g_id),
         "tags", "Tag Groups", ctx)
     sub_oob = await oob_header_sx("root-settings-header-child", "tag-groups-header-child", sub_hdr)
-    return await render_to_sx("sub-settings-layout-oob",
+    return sx_call("sub-settings-layout-oob",
         settings_header_oob=SxExpr(settings_hdr_oob),
         sub_header_oob=SxExpr(sub_oob))