Send all responses as sexp wire format with client-side rendering

- Server sends sexp source text, client (sexp.js) renders everything
- SexpExpr marker class for nested sexp composition in serialize()
- sexp_page() HTML shell with data-mount="body" for full page loads
- sexp_response() returns text/sexp for OOB/partial responses
- ~app-body layout component replaces ~app-layout (no raw!)
- ~rich-text is the only component using raw! (for CMS HTML content)
- Fragment endpoints return text/sexp, auto-wrapped in SexpExpr
- All _*_html() helpers converted to _*_sexp() returning sexp source
- Head auto-hoist: sexp.js moves meta/title/link/script[ld+json]
  from rendered body to document.head automatically
- Unknown components render warning box instead of crashing page
- Component kwargs preserve AST for lazy rendering (fixes <> in kwargs)
- Fix unterminated paren in events/sexp/tickets.sexpr

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

blog/bp/post/admin/routes.py

@@ -12,6 +12,7 @@ from quart import (
 )
 from shared.browser.app.authz import require_admin, require_post_author
 from shared.browser.app.utils.htmx import is_htmx_request
+from shared.sexp.helpers import sexp_response
 from shared.utils import host_url
 
 def register():
@@ -58,10 +59,10 @@ def register():
     tctx.update(ctx)
     if not is_htmx_request():
         html = await render_post_admin_page(tctx)
+        return await make_response(html)
     else:
-        html = await render_post_admin_oob(tctx)
-
-    return await make_response(html)
+        sexp_src = await render_post_admin_oob(tctx)
+        return sexp_response(sexp_src)
 
   @bp.put("/features/")
   @require_admin
@@ -105,7 +106,7 @@ def register():
         sumup_merchant_code=result.get("sumup_merchant_code") or "",
         sumup_checkout_prefix=result.get("sumup_checkout_prefix") or "",
     )
-    return await make_response(html)
+    return sexp_response(html)
 
   @bp.put("/admin/sumup/")
   @require_admin
@@ -144,7 +145,7 @@ def register():
         sumup_merchant_code=result.get("sumup_merchant_code") or "",
         sumup_checkout_prefix=result.get("sumup_checkout_prefix") or "",
     )
-    return await make_response(html)
+    return sexp_response(html)
 
   @bp.get("/data/")
   @require_admin
@@ -157,10 +158,10 @@ def register():
     tctx["data_html"] = data_html
     if not is_htmx_request():
       html = await render_post_data_page(tctx)
+      return await make_response(html)
     else:
-      html = await render_post_data_oob(tctx)
-
-    return await make_response(html)
+      sexp_src = await render_post_data_oob(tctx)
+      return sexp_response(sexp_src)
 
   @bp.get("/entries/calendar/<int:calendar_id>/")
   @require_admin
@@ -280,10 +281,10 @@ def register():
     tctx["entries_html"] = entries_html
     if not is_htmx_request():
       html = await render_post_entries_page(tctx)
+      return await make_response(html)
     else:
-      html = await render_post_entries_oob(tctx)
-
-    return await make_response(html)
+      sexp_src = await render_post_entries_oob(tctx)
+      return sexp_response(sexp_src)
 
   @bp.post("/entries/<int:entry_id>/toggle/")
   @require_admin
@@ -335,7 +336,7 @@ def register():
     admin_list = render_associated_entries(all_calendars, associated_entry_ids, post["slug"])
     nav_entries_html = render_nav_entries_oob(associated_entries, calendars, post)
 
-    return await make_response(admin_list + nav_entries_html)
+    return sexp_response(admin_list + nav_entries_html)
 
   @bp.get("/settings/")
   @require_post_author
@@ -359,10 +360,10 @@ def register():
     tctx["settings_html"] = settings_html
     if not is_htmx_request():
       html = await render_post_settings_page(tctx)
+      return await make_response(html)
     else:
-      html = await render_post_settings_oob(tctx)
-
-    return await make_response(html)
+      sexp_src = await render_post_settings_oob(tctx)
+      return sexp_response(sexp_src)
 
   @bp.post("/settings/")
   @require_post_author
@@ -465,10 +466,10 @@ def register():
     tctx["edit_html"] = edit_html
     if not is_htmx_request():
       html = await render_post_edit_page(tctx)
+      return await make_response(html)
     else:
-      html = await render_post_edit_oob(tctx)
-
-    return await make_response(html)
+      sexp_src = await render_post_edit_oob(tctx)
+      return sexp_response(sexp_src)
 
   @bp.post("/edit/")
   @require_post_author
@@ -598,8 +599,7 @@ def register():
     page_markets = await _fetch_page_markets(post_id)
 
     from sexp.sexp_components import render_markets_panel
-    html = render_markets_panel(page_markets, post)
-    return await make_response(html)
+    return sexp_response(render_markets_panel(page_markets, post))
 
   @bp.post("/markets/new/")
   @require_admin
@@ -625,8 +625,7 @@ def register():
     page_markets = await _fetch_page_markets(post_id)
 
     from sexp.sexp_components import render_markets_panel
-    html = render_markets_panel(page_markets, post)
-    return await make_response(html)
+    return sexp_response(render_markets_panel(page_markets, post))
 
   @bp.delete("/markets/<market_slug>/")
   @require_admin
@@ -646,7 +645,6 @@ def register():
     page_markets = await _fetch_page_markets(post_id)
 
     from sexp.sexp_components import render_markets_panel
-    html = render_markets_panel(page_markets, post)
-    return await make_response(html)
+    return sexp_response(render_markets_panel(page_markets, post))
 
   return bp