Fix HS browser activation: host-get function sentinel, runtime symbol shadow, lazy dep chain

Three bugs fixed:
1. host-get in sx-platform.js: return true for function-valued properties
   so dom-get-attr/dom-set-attr guards pass (functions can't cross WASM boundary)
2. hs-runtime.sx: renamed host-get→hs-host-get and dom-query→hs-dom-query to
   stop shadowing platform natives when loaded as .sx source
3. compile-modules.js: HS dependency chain (integration→runtime→compiler→parser→tokenizer)
   so lazy loading pulls in all deps. Non-library modules load as .sx source
   for CEK env visibility.

Result: 8/8 elements activate, hs-on attaches listeners. Click handler needs
IO suspension support (VmSuspended in sx_browser.ml) to fire — next step.

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

lib/hyperscript/runtime.sx

@@ -49,7 +49,9 @@
 ;; Toggle a single class on an element.
 (define
   hs-toggle-class!
-  (fn (target cls) (host-call (host-get target "classList") "toggle" cls)))
+  (fn
+    (target cls)
+    (host-call (hs-host-get target "classList") "toggle" cls)))
 
 ;; Toggle between two classes — exactly one is active at a time.
 (define
@@ -136,7 +138,7 @@
         (find-prev sibling)))))
 
 ;; First element matching selector within a scope.
-(define hs-query-first (fn (sel) (dom-query sel)))
+(define hs-query-first (fn (sel) (hs-dom-query sel)))
 
 ;; Last element matching selector.
 (define
@@ -466,9 +468,11 @@
         d))))
 ;; ── Sandbox/test runtime additions ──────────────────────────────
 ;; Property access — dot notation and .length
-(define host-get (fn (obj key) (if (= key "length") (len obj) (get obj key))))
+(define
+  hs-host-get
+  (fn (obj key) (if (= key "length") (len obj) (get obj key))))
 ;; DOM query stub — sandbox returns empty list
-(define dom-query (fn (selector) (list)))
+(define hs-dom-query (fn (selector) (list)))
 ;; Method dispatch — obj.method(args)
 (define hs-method-call (fn (obj method &rest args)
   (cond
@@ -488,7 +492,7 @@
 ;; beep! — debug logging, returns value unchanged
 (define hs-beep (fn (v) v))
 ;; Property-based is — check obj.key truthiness
-(define hs-prop-is (fn (obj key) (not (hs-falsy? (host-get obj key)))))
+(define hs-prop-is (fn (obj key) (not (hs-falsy? (hs-host-get obj key)))))
 ;; Array slicing (inclusive both ends)
 (define hs-slice (fn (col start end)
   (let ((s (if (nil? start) 0 start))