Rebrand sexp → sx across web platform (173 files)

Rename all sexp directories, files, identifiers, and references to sx.
artdag/ excluded (separate media processing DSL).

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

orders/bp/orders/routes.py

@@ -116,8 +116,8 @@ def register(url_prefix: str) -> Blueprint:
         result = await g.s.execute(stmt)
         orders = result.scalars().all()
 
-        from shared.sexp.page import get_template_context
-        from sexp.sexp_components import (
+        from shared.sx.page import get_template_context
+        from sx.sx_components import (
             render_orders_page,
             render_orders_rows,
             render_orders_oob,
@@ -133,19 +133,19 @@ def register(url_prefix: str) -> Blueprint:
             )
             resp = await make_response(html)
         elif page > 1:
-            # Sexp wire format — client renders order rows
-            from shared.sexp.helpers import sexp_response
-            sexp_src = await render_orders_rows(
+            # Sx wire format — client renders order rows
+            from shared.sx.helpers import sx_response
+            sx_src = await render_orders_rows(
                 ctx, orders, page, total_pages, url_for, qs_fn,
             )
-            resp = sexp_response(sexp_src)
+            resp = sx_response(sx_src)
         else:
-            from shared.sexp.helpers import sexp_response
-            sexp_src = await render_orders_oob(
+            from shared.sx.helpers import sx_response
+            sx_src = await render_orders_oob(
                 ctx, orders, page, total_pages, search, total_count,
                 url_for, qs_fn,
             )
-            resp = sexp_response(sexp_src)
+            resp = sx_response(sx_src)
 
         resp.headers["Hx-Push-Url"] = _current_url_without_page()
         return _vary(resp)