host: blog on the editor's sx_content model + render-to-html, 171/171

Pivot blog to the SX editor's content model. The editor (blog/sx/editor.sx)
emits sx_content = SX element markup, NOT content-on-sx CtDoc blocks. So a post
is now a {slug,title,sx_content,status} record in the durable persist KV, and a
post page is render-to-html(parse sx_content) — server-side, static, no client
runtime needed to view.

Endpoints: GET / (HTML index), /<slug>/ (rendered post), /posts (JSON list),
/new (create form); POST /new (form-urlencoded editor ingest, slug from title,
303 redirect), POST /posts (JSON create), PUT/DELETE /posts/<slug>. Writes
behind auth+ACL (edit/blog). Dropped the content-on-sx/Smalltalk preload chain;
added spec/render + web/adapter-html (render-to-html) + lib/dream/form.

BONUS: render-to-html is ~0ms (vs the 2s content-on-sx Smalltalk asHTML) — it
doesn't hit the JIT-miscompiled path, so blog rendering is no longer slow.

Live: blog.rose-ash.com/ lists posts, /welcome/ renders instantly. Reads live;
the form-ingest write path needs an auth decision before going live (browser
forms can't send bearer; needs session or a Caddy basicauth gate).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/host/conformance.sh

@@ -55,27 +55,19 @@ MODULES=(
   "lib/feed/normalize.sx"
   "lib/feed/stream.sx"
   "lib/feed/api.sx"
-  "lib/smalltalk/tokenizer.sx"
-  "lib/smalltalk/parser.sx"
-  "lib/guest/reflective/class-chain.sx"
-  "lib/smalltalk/runtime.sx"
-  "lib/guest/reflective/env.sx"
-  "lib/smalltalk/eval.sx"
   "lib/persist/event.sx"
   "lib/persist/backend.sx"
   "lib/persist/log.sx"
   "lib/persist/kv.sx"
   "lib/persist/api.sx"
-  "lib/content/block.sx"
-  "lib/content/doc.sx"
-  "lib/content/render.sx"
-  "lib/content/api.sx"
-  "lib/content/store.sx"
   "lib/persist/durable.sx"
+  "spec/render.sx"
+  "web/adapter-html.sx"
   "lib/dream/types.sx"
   "lib/dream/json.sx"
   "lib/dream/auth.sx"
   "lib/dream/error.sx"
+  "lib/dream/form.sx"
   "lib/dream/router.sx"
   "lib/host/handler.sx"
   "lib/host/middleware.sx"