Split make_server_env, eliminate all runtime sx_ref imports, fix auth-menu tests

make_server_env split into 7 focused setup functions:
- setup_browser_stubs (22 DOM no-ops)
- setup_scope_env (18 scope primitives from sx_scope.ml)
- setup_evaluator_bridge (CEK eval-expr, trampoline, expand-macro, etc.)
- setup_introspection (type predicates, component/lambda accessors)
- setup_type_operations (string/env/dict/equality/parser helpers)
- setup_html_tags (~100 HTML tag functions)
- setup_io_env (query, action, helper IO bridge)

Eliminate ALL runtime sx_ref.py imports:
- sx/sxc/pages/helpers.py: 24 imports → _ocaml_helpers.py bridge
- sx/sxc/pages/sx_router.py: remove SX_USE_REF fallback
- shared/sx/query_registry.py: use register_components instead of eval

Unify JIT compilation: pre-compile list derived from allowlist
(no manual duplication), only compiler internals pre-compiled.

Fix test_components auth-menu: ~auth-menu → ~shared:fragments/auth-menu

Tests: 1114 OCaml, 29/29 components, 35/35 regression, 6/6 Playwright

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

shared/sx/tests/test_components.py

@@ -59,7 +59,7 @@ class TestCartMini:
 class TestAuthMenu:
     def test_logged_in(self):
         html = sx(
-            '(~auth-menu :user-email user-email :account-url account-url)',
+            '(~shared:fragments/auth-menu :user-email user-email :account-url account-url)',
             **{"user-email": "alice@example.com", "account-url": "https://account.example.com/"},
         )
         assert 'id="auth-menu-desktop"' in html
@@ -70,7 +70,7 @@ class TestAuthMenu:
 
     def test_logged_out(self):
         html = sx(
-            '(~auth-menu :account-url account-url)',
+            '(~shared:fragments/auth-menu :account-url account-url)',
             **{"account-url": "https://account.example.com/"},
         )
         assert "fa-solid fa-key" in html
@@ -78,7 +78,7 @@ class TestAuthMenu:
 
     def test_desktop_has_data_close_details(self):
         html = sx(
-            '(~auth-menu :user-email "x@y.com" :account-url "http://a")',
+            '(~shared:fragments/auth-menu :user-email "x@y.com" :account-url "http://a")',
         )
         assert "data-close-details" in html
 
@@ -86,7 +86,7 @@ class TestAuthMenu:
         """Both desktop and mobile spans are always rendered."""
         for email in ["user@test.com", None]:
             html = sx(
-                '(~auth-menu :user-email user-email :account-url account-url)',
+                '(~shared:fragments/auth-menu :user-email user-email :account-url account-url)',
                 **{"user-email": email, "account-url": "http://a"},
             )
             assert 'id="auth-menu-desktop"' in html