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>

blog/bp/fragments/routes.py

@@ -1,6 +1,6 @@
 """Blog app fragment endpoints.
 
-Exposes sexp fragments at ``/internal/fragments/<type>`` for consumption
+Exposes sx fragments at ``/internal/fragments/<type>`` for consumption
 by other coop apps via the fragment client.
 """
 
@@ -26,13 +26,13 @@ def register():
     async def get_fragment(fragment_type: str):
         handler = _handlers.get(fragment_type)
         if handler is None:
-            return Response("", status=200, content_type="text/sexp")
+            return Response("", status=200, content_type="text/sx")
         result = await handler()
-        return Response(result, status=200, content_type="text/sexp")
+        return Response(result, status=200, content_type="text/sx")
 
-    # --- nav-tree fragment — returns sexp source ---
+    # --- nav-tree fragment — returns sx source ---
     async def _nav_tree_handler():
-        from shared.sexp.helpers import sexp_call, SexpExpr
+        from shared.sx.helpers import sx_call, SxExpr
         from shared.infrastructure.urls import (
             blog_url, cart_url, market_url, events_url,
             federation_url, account_url, artdag_url,
@@ -54,36 +54,36 @@ def register():
 
         nav_cls = "whitespace-nowrap flex items-center gap-2 rounded p-2 text-sm"
 
-        item_sexps = []
+        item_sxs = []
         for item in menu_items:
             href = app_slugs.get(item.slug, blog_url(f"/{item.slug}/"))
             selected = "true" if (item.slug == first_seg
                                   or item.slug == app_name) else "false"
-            img = sexp_call("blog-nav-item-image",
+            img = sx_call("blog-nav-item-image",
                             src=getattr(item, "feature_image", None),
                             label=getattr(item, "label", item.slug))
-            item_sexps.append(sexp_call(
+            item_sxs.append(sx_call(
                 "blog-nav-item-link",
                 href=href, hx_get=href, selected=selected, nav_cls=nav_cls,
-                img=SexpExpr(img), label=getattr(item, "label", item.slug),
+                img=SxExpr(img), label=getattr(item, "label", item.slug),
             ))
 
         # artdag link
         href = artdag_url("/")
         selected = "true" if ("artdag" == first_seg
                               or "artdag" == app_name) else "false"
-        img = sexp_call("blog-nav-item-image", src=None, label="art-dag")
-        item_sexps.append(sexp_call(
+        img = sx_call("blog-nav-item-image", src=None, label="art-dag")
+        item_sxs.append(sx_call(
             "blog-nav-item-link",
             href=href, hx_get=href, selected=selected, nav_cls=nav_cls,
-            img=SexpExpr(img), label="art-dag",
+            img=SxExpr(img), label="art-dag",
         ))
 
-        if not item_sexps:
-            return sexp_call("blog-nav-empty",
+        if not item_sxs:
+            return sx_call("blog-nav-empty",
                              wrapper_id="menu-items-nav-wrapper")
 
-        items_frag = "(<> " + " ".join(item_sexps) + ")"
+        items_frag = "(<> " + " ".join(item_sxs) + ")"
 
         arrow_cls = "scrolling-menu-arrow-menu-items-container"
         container_id = "menu-items-container"
@@ -101,21 +101,21 @@ def register():
         right_hs = ("on click set #" + container_id
                      + ".scrollLeft to #" + container_id + ".scrollLeft + 200")
 
-        return sexp_call("blog-nav-wrapper",
+        return sx_call("blog-nav-wrapper",
                          arrow_cls=arrow_cls,
                          container_id=container_id,
                          left_hs=left_hs,
                          scroll_hs=scroll_hs,
                          right_hs=right_hs,
-                         items=SexpExpr(items_frag))
+                         items=SxExpr(items_frag))
 
     _handlers["nav-tree"] = _nav_tree_handler
 
-    # --- link-card fragment — returns sexp source ---
-    def _blog_link_card_sexp(post, link: str) -> str:
-        from shared.sexp.helpers import sexp_call
+    # --- link-card fragment — returns sx source ---
+    def _blog_link_card_sx(post, link: str) -> str:
+        from shared.sx.helpers import sx_call
         published = post.published_at.strftime("%d %b %Y") if post.published_at else None
-        return sexp_call("link-card",
+        return sx_call("link-card",
                          link=link,
                          title=post.title,
                          image=post.feature_image,
@@ -139,7 +139,7 @@ def register():
                 parts.append(f"<!-- fragment:{s} -->")
                 post = await services.blog.get_post_by_slug(g.s, s)
                 if post:
-                    parts.append(_blog_link_card_sexp(post, blog_url(f"/{post.slug}")))
+                    parts.append(_blog_link_card_sx(post, blog_url(f"/{post.slug}")))
             return "\n".join(parts)
 
         # Single mode
@@ -148,7 +148,7 @@ def register():
         post = await services.blog.get_post_by_slug(g.s, slug)
         if not post:
             return ""
-        return _blog_link_card_sexp(post, blog_url(f"/{post.slug}"))
+        return _blog_link_card_sx(post, blog_url(f"/{post.slug}"))
 
     _handlers["link-card"] = _link_card_handler