VM aser-slot → sx-page-full: single-call page render, 0.55s warm

Compiler fixes:
- Upvalue re-lookup returns own position (uv-index), not parent slot
- Spec: cek-call uses (make-env) not (dict) — OCaml Dict≠Env
- Bootstrap post-processes transpiler Dict→Env for cek_call

VM runtime fixes:
- compile_adapter evaluates constant defines (SPECIAL_FORM_NAMES etc.)
  via execute_module instead of wrapping as NativeFn closures
- Native primitives: map-indexed, some, every?
- Nil-safe HO forms: map/filter/for-each/some/every? accept nil as empty
- expand-components? set in kernel env (not just VM globals)
- unwrap_env diagnostic: reports actual type received

sx-page-full command:
- Single OCaml call: aser-slot body + render-to-html shell
- Eliminates two pipe round-trips (was: aser-slot→Python→shell render)
- Shell statics (component_defs, CSS, pages_sx) cached in Python,
  injected into kernel once, referenced by symbol in per-request command
- Large blobs use placeholder tokens — Python splices post-render,
  pipe transfers ~51KB instead of 2MB

Performance (warm):
- Server total: 0.55s (was ~2s)
- aser-slot VM: 0.3s, shell render: 0.01s, pipe: 0.06s
- kwargs computation: 0.000s (cached)

SX_STANDALONE mode for sx_docs dev (skips fragment fetches).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

sx/app.py

@@ -182,11 +182,11 @@ def create_app() -> "Quart":
         from quart import request, make_response
         from shared.browser.app.utils.htmx import is_htmx_request
         from shared.sx.jinja_bridge import get_component_env, _get_request_context
-        from shared.sx.async_eval import async_eval_slot_to_sx
         from shared.sx.types import Symbol, Keyword
         from shared.sx.helpers import full_page_sx, oob_page_sx, sx_response
         from shared.sx.pages import get_page_helpers
         from shared.sx.page import get_template_context
+        import os
 
         path = request.path
         content_ast = [
@@ -199,7 +199,15 @@ def create_app() -> "Quart":
         ctx = _get_request_context()
 
         try:
-            content_sx = await async_eval_slot_to_sx(content_ast, env, ctx)
+            if os.environ.get("SX_USE_OCAML") == "1":
+                from shared.sx.ocaml_bridge import get_bridge
+                from shared.sx.parser import serialize
+                bridge = await get_bridge()
+                sx_text = serialize(content_ast)
+                content_sx = await bridge.aser_slot(sx_text, ctx={"_helper_service": "sx"})
+            else:
+                from shared.sx.async_eval import async_eval_slot_to_sx
+                content_sx = await async_eval_slot_to_sx(content_ast, env, ctx)
         except Exception:
             from shared.browser.app.errors import _sx_error_page
             html = _sx_error_page("404", "NOT FOUND",