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>

events/bp/calendar_entry/routes.py

@@ -28,6 +28,7 @@ import math
 import logging
 
 from shared.infrastructure.fragments import fetch_fragment
+from shared.sexp.helpers import sexp_response
 
 from ..ticket_types.routes import register as register_ticket_types
 
@@ -216,12 +217,12 @@ def register():
                         )
 
         # Fetch container nav from relations (exclude calendar — we're on a calendar page)
-        container_nav_html = ""
+        container_nav = ""
         post_data = getattr(g, "post_data", None)
         if post_data:
             post_id = post_data["post"]["id"]
             post_slug = post_data["post"]["slug"]
-            container_nav_html = await fetch_fragment("relations", "container-nav", params={
+            container_nav = await fetch_fragment("relations", "container-nav", params={
                 "container_type": "page",
                 "container_id": str(post_id),
                 "post_slug": post_slug,
@@ -235,7 +236,7 @@ def register():
             "ticket_sold_count": ticket_sold_count,
             "user_ticket_count": user_ticket_count,
             "user_ticket_counts_by_type": user_ticket_counts_by_type,
-            "container_nav_html": container_nav_html,
+            "container_nav": container_nav,
         }
     @bp.get("/")
     @require_admin
@@ -247,10 +248,10 @@ def register():
         tctx = await get_template_context()
         if not is_htmx_request():
             html = await render_entry_page(tctx)
+            return await make_response(html, 200)
         else:
-            html = await render_entry_oob(tctx)
-
-        return await make_response(html, 200)
+            sexp_src = await render_entry_oob(tctx)
+            return sexp_response(sexp_src)
 
     @bp.get("/edit/")
     @require_admin
@@ -423,7 +424,7 @@ def register():
 
         tctx = await get_template_context()
         html = await render_entry_page(tctx)
-        return await make_response(html + nav_oob, 200)
+        return sexp_response(html + nav_oob)
 
 
     @bp.post("/confirm/")
@@ -449,7 +450,7 @@ def register():
         await g.s.refresh(g.entry)
         from sexp.sexp_components import render_entry_optioned
         html = render_entry_optioned(g.entry, g.calendar, day, month, year)
-        return await make_response(html + day_nav_oob + post_nav_oob, 200)
+        return sexp_response(html + day_nav_oob + post_nav_oob)
 
     @bp.post("/decline/")
     @require_admin
@@ -474,7 +475,7 @@ def register():
         await g.s.refresh(g.entry)
         from sexp.sexp_components import render_entry_optioned
         html = render_entry_optioned(g.entry, g.calendar, day, month, year)
-        return await make_response(html + day_nav_oob + post_nav_oob, 200)
+        return sexp_response(html + day_nav_oob + post_nav_oob)
 
     @bp.post("/provisional/")
     @require_admin
@@ -499,7 +500,7 @@ def register():
         await g.s.refresh(g.entry)
         from sexp.sexp_components import render_entry_optioned
         html = render_entry_optioned(g.entry, g.calendar, day, month, year)
-        return await make_response(html + day_nav_oob + post_nav_oob, 200)
+        return sexp_response(html + day_nav_oob + post_nav_oob)
 
     @bp.post("/tickets/")
     @require_admin
@@ -543,7 +544,7 @@ def register():
         await g.s.refresh(g.entry)
         from sexp.sexp_components import render_entry_tickets_config
         html = render_entry_tickets_config(g.entry, g.calendar, request.view_args.get("day"), request.view_args.get("month"), request.view_args.get("year"))
-        return await make_response(html, 200)
+        return sexp_response(html)
 
     @bp.get("/posts/search/")
     @require_admin
@@ -596,7 +597,7 @@ def register():
         va = request.view_args or {}
         html = render_entry_posts_panel(entry_posts, g.entry, g.calendar, va.get("day"), va.get("month"), va.get("year"))
         nav_oob = render_entry_posts_nav_oob(entry_posts)
-        return await make_response(html + nav_oob, 200)
+        return sexp_response(html + nav_oob)
 
     @bp.delete("/posts/<int:post_id>/")
     @require_admin
@@ -618,6 +619,6 @@ def register():
         va = request.view_args or {}
         html = render_entry_posts_panel(entry_posts, g.entry, g.calendar, va.get("day"), va.get("month"), va.get("year"))
         nav_oob = render_entry_posts_nav_oob(entry_posts)
-        return await make_response(html + nav_oob, 200)
+        return sexp_response(html + nav_oob)
 
     return bp