HS: call command fix, event destructuring, array ops, form reset

- call: use make-symbol for fn name, rest-rest for args (was string + nth)
- on: extract (ref ...) nodes from body as event.detail let-bindings
- host-set!: add ListRef+Number case for array index mutation
- append!: support index 0 for prepend
- hs-put!: branch on list? for array start/end operations
- hs-reset!: form reset restoring defaultValue/checked/textContent
- 522/793 pass (was 493/754)

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

lib/hyperscript/runtime.sx

@@ -161,12 +161,21 @@
   (fn
     (value pos target)
     (cond
-      ((= pos "into") (dom-set-inner-html target value))
+      ((= pos "into")
+        (if (list? target) target (dom-set-inner-html target value)))
       ((= pos "before")
         (dom-insert-adjacent-html target "beforebegin" value))
       ((= pos "after") (dom-insert-adjacent-html target "afterend" value))
-      ((= pos "start") (dom-insert-adjacent-html target "afterbegin" value))
-      ((= pos "end") (dom-insert-adjacent-html target "beforeend" value)))))
+      ((= pos "start")
+        (if
+          (list? target)
+          (append! target value 0)
+          (dom-insert-adjacent-html target "afterbegin" value)))
+      ((= pos "end")
+        (if
+          (list? target)
+          (append! target value)
+          (dom-insert-adjacent-html target "beforeend" value))))))
 
 ;; Last element matching selector.
 (define