HS parser: is/is-not ignoring case, eq-ignore-case runtime — 423→425

- Parse `is X ignoring case` → (eq-ignore-case left right)
- Parse `is not X ignoring case` → (not (eq-ignore-case left right))
- Compiler: eq-ignore-case → hs-eq-ignore-case
- Runtime: hs-eq-ignore-case using downcase/str

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

lib/hyperscript/runtime.sx

@@ -388,6 +388,10 @@
   (fn (a b) (and (= (type-of a) (type-of b)) (= a b))))
 ;; ── Sandbox/test runtime additions ──────────────────────────────
 ;; Property access — dot notation and .length
+(define
+  hs-eq-ignore-case
+  (fn (a b) (= (downcase (str a)) (downcase (str b)))))
+;; DOM query stub — sandbox returns empty list
 (define
   hs-falsy?
   (fn
@@ -399,7 +403,7 @@
       ((and (list? v) (= (len v) 0)) true)
       ((= v 0) true)
       (true false))))
-;; DOM query stub — sandbox returns empty list
+;; Method dispatch — obj.method(args)
 (define
   hs-matches?
   (fn
@@ -408,7 +412,9 @@
       (string? target)
       (if (= pattern ".*") true (string-contains? target pattern))
       false)))
-;; Method dispatch — obj.method(args)
+
+;; ── 0.9.90 features ─────────────────────────────────────────────
+;; beep! — debug logging, returns value unchanged
 (define
   hs-contains?
   (fn
@@ -428,11 +434,9 @@
               true
               (hs-contains? (rest collection) item)))))
       (true false))))
-
-;; ── 0.9.90 features ─────────────────────────────────────────────
-;; beep! — debug logging, returns value unchanged
-(define precedes? (fn (a b) (< (str a) (str b))))
 ;; Property-based is — check obj.key truthiness
+(define precedes? (fn (a b) (< (str a) (str b))))
+;; Array slicing (inclusive both ends)
 (define
   hs-empty?
   (fn
@@ -443,7 +447,7 @@
       ((list? v) (= (len v) 0))
       ((dict? v) (= (len (keys v)) 0))
       (true false))))
-;; Array slicing (inclusive both ends)
+;; Collection: sorted by
 (define
   hs-empty-target!
   (fn
@@ -464,11 +468,11 @@
                   (dom-set-prop target "value" ""))))
             ((= tag "FORM") (dom-set-inner-html target ""))
             (true (dom-set-inner-html target ""))))))))
-;; Collection: sorted by
-(define hs-first (fn (lst) (first lst)))
 ;; Collection: sorted by descending
-(define hs-last (fn (lst) (last lst)))
+(define hs-first (fn (lst) (first lst)))
 ;; Collection: split by
+(define hs-last (fn (lst) (last lst)))
+;; Collection: joined by
 (define
   hs-template
   (fn
@@ -554,7 +558,7 @@
                   (set! i (+ i 1))
                   (tpl-loop)))))))
       (do (tpl-loop) result))))
-;; Collection: joined by
+
 (define
   hs-make-object
   (fn