Replace sx_call() with render_to_sx() across all services

Python no longer generates s-expression strings. All SX rendering now
goes through render_to_sx() which builds AST from native Python values
and evaluates via async_eval_to_sx() — no SX string literals in Python.

- Add render_to_sx()/render_to_html() infrastructure in shared/sx/helpers.py
- Add (abort status msg) IO primitive in shared/sx/primitives_io.py
- Convert all 9 services: ~650 sx_call() invocations replaced
- Convert shared helpers (root_header_sx, full_page_sx, etc.) to async
- Fix likes service import bug (likes.models → models)

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

shared/infrastructure/activitypub.py

@@ -114,18 +114,18 @@ async def _render_profile_sx(actor, activities, total):
         # Import federation layout for OOB headers
         try:
             from federation.sxc.pages import _social_oob
-            oob_headers = _social_oob(tctx)
+            oob_headers = await _social_oob(tctx)
         except ImportError:
             oob_headers = ""
-        return sx_response(oob_page_sx(oobs=oob_headers, content=content))
+        return sx_response(await oob_page_sx(oobs=oob_headers, content=content))
     else:
         try:
             from federation.sxc.pages import _social_full
-            header_rows = _social_full(tctx)
+            header_rows = await _social_full(tctx)
         except ImportError:
             from shared.sx.helpers import root_header_sx
-            header_rows = root_header_sx(tctx)
-        return full_page_sx(tctx, header_rows=header_rows, content=content)
+            header_rows = await root_header_sx(tctx)
+        return await full_page_sx(tctx, header_rows=header_rows, content=content)
 
 
 def create_activitypub_blueprint(app_name: str) -> Blueprint:

shared/infrastructure/ap_social.py

@@ -92,14 +92,14 @@ def create_ap_social_blueprint(app_name: str) -> Blueprint:
         kw = {"actor": actor}
 
         if is_htmx_request():
-            oob_headers = _social_oob_headers(tctx, **kw)
-            return sx_response(oob_page_sx(
+            oob_headers = await _social_oob_headers(tctx, **kw)
+            return sx_response(await oob_page_sx(
                 oobs=oob_headers,
                 content=content,
             ))
         else:
-            header_rows = _social_full_headers(tctx, **kw)
-            return full_page_sx(tctx, header_rows=header_rows, content=content)
+            header_rows = await _social_full_headers(tctx, **kw)
+            return await full_page_sx(tctx, header_rows=header_rows, content=content)
 
     # -- Index ----------------------------------------------------------------
 

shared/infrastructure/ap_social_sx.py

@@ -14,10 +14,9 @@ from typing import Any
 from markupsafe import escape
 
 from shared.sx.helpers import (
-    sx_call, root_header_sx, oob_header_sx,
+    root_header_sx, oob_header_sx,
     mobile_menu_sx, mobile_root_nav_sx, full_page_sx, oob_page_sx,
 )
-from shared.sx.parser import SxExpr
 
 
 # ---------------------------------------------------------------------------
@@ -91,23 +90,23 @@ def _social_header_row(actor: Any) -> str:
     )
 
 
-def _social_full_headers(ctx: dict, **kw: Any) -> str:
-    root_hdr = root_header_sx(ctx)
+async def _social_full_headers(ctx: dict, **kw: Any) -> str:
+    root_hdr = await root_header_sx(ctx)
     actor = kw.get("actor")
     social_row = _social_header_row(actor)
     return "(<> " + root_hdr + " " + social_row + ")"
 
 
-def _social_oob_headers(ctx: dict, **kw: Any) -> str:
-    root_hdr = root_header_sx(ctx)
+async def _social_oob_headers(ctx: dict, **kw: Any) -> str:
+    root_hdr = await root_header_sx(ctx)
     actor = kw.get("actor")
     social_row = _social_header_row(actor)
     rows = "(<> " + root_hdr + " " + social_row + ")"
-    return oob_header_sx("root-header-child", "social-lite-header-child", rows)
+    return await oob_header_sx("root-header-child", "social-lite-header-child", rows)
 
 
-def _social_mobile(ctx: dict, **kw: Any) -> str:
-    return mobile_menu_sx(mobile_root_nav_sx(ctx))
+async def _social_mobile(ctx: dict, **kw: Any) -> str:
+    return mobile_menu_sx(await mobile_root_nav_sx(ctx))
 
 
 # ---------------------------------------------------------------------------