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>

shared/sx/jinja_bridge.py

@@ -342,6 +342,8 @@ def reload_if_changed() -> None:
         _CLIENT_LIBRARY_SOURCES.clear()
         _dirs_from_cache.clear()
         invalidate_component_hash()
+        from .helpers import invalidate_shell_cache
+        invalidate_shell_cache()
         # Reload SX libraries first (e.g. z3.sx) so reader macros resolve
         for cb in _reload_callbacks:
             cb()
@@ -360,6 +362,8 @@ def reload_if_changed() -> None:
             from .ocaml_bridge import _bridge
             if _bridge is not None:
                 _bridge._components_loaded = False
+                _bridge._shell_statics_injected = False
+                _bridge._helpers_injected = False
 
         # Recompute render plans for all services that have pages
         from .pages import _PAGE_REGISTRY, compute_page_render_plans