Delete account/sx/sx_components.py — all rendering now in .sx

Phase 1 of zero-Python rendering: account service.

- Auth pages (login, device, check-email) use _render_auth_page() helper
  calling render_to_sx() + full_page_sx() directly in routes
- Newsletter toggle POST renders inline via render_to_sx()
- Newsletter page helper returns data dict; defpage :data slot fetches,
  :content slot renders via ~account-newsletters-content defcomp
- Fragment page uses (frag ...) IO primitive directly in .sx
- Defpage _eval_slot now uses async_eval_slot_to_sx which expands
  component bodies server-side (executing IO) but serializes tags as SX
- Fix pre-existing OOB ParseError: _eval_slot was producing HTML instead
  of s-expressions for component content slots
- Fix market url_for endpoint: defpage_market_home (app-level, not blueprint)
- Fix events calendar nav: wrap multiple SX parts in fragment

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

account/bp/account/routes.py

@@ -7,14 +7,13 @@ from __future__ import annotations
 
 from quart import (
     Blueprint,
-    request,
     g,
 )
 from sqlalchemy import select
 
 from shared.models import UserNewsletter
 from shared.infrastructure.fragments import fetch_fragments
-from shared.sx.helpers import sx_response
+from shared.sx.helpers import sx_response, render_to_sx
 
 
 def register(url_prefix="/"):
@@ -55,7 +54,26 @@ def register(url_prefix="/"):
 
         await g.s.flush()
 
-        from sx.sx_components import render_newsletter_toggle
-        return sx_response(await render_newsletter_toggle(un))
+        # Render toggle directly — no sx_components intermediary
+        from shared.browser.app.csrf import generate_csrf_token
+        from shared.infrastructure.urls import account_url
+
+        nid = un.newsletter_id
+        url_fn = getattr(g, "_account_url", None) or account_url
+        toggle_url = url_fn(f"/newsletter/{nid}/toggle/")
+        csrf = generate_csrf_token()
+        bg = "bg-emerald-500" if un.subscribed else "bg-stone-300"
+        translate = "translate-x-6" if un.subscribed else "translate-x-1"
+        checked = "true" if un.subscribed else "false"
+
+        return sx_response(await render_to_sx(
+            "account-newsletter-toggle",
+            id=f"nl-{nid}", url=toggle_url,
+            hdrs=f'{{"X-CSRFToken": "{csrf}"}}',
+            target=f"#nl-{nid}",
+            cls=f"relative inline-flex h-6 w-11 items-center rounded-full transition-colors focus:outline-none focus:ring-2 focus:ring-emerald-500 focus:ring-offset-2 {bg}",
+            checked=checked,
+            knob_cls=f"inline-block h-4 w-4 rounded-full bg-white shadow transform transition-transform {translate}",
+        ))
 
     return account_bp