HS parser: possessive 's style property access (517→519/831)

parse-poss-tail now handles style token type after 's operator.
#div2's *color, #foo's *width etc. now correctly produce
(style prop owner) AST which compiles to dom-set/get-style.

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

lib/hyperscript/parser.sx

@@ -63,6 +63,7 @@
                 (let
                   ((prop (get (adv!) "value")))
                   (parse-prop-chain (list (quote .) owner prop))))
+              ((= typ "style") (do (adv!) (list (quote style) val owner)))
               (true owner)))))
       (define
         parse-prop-chain

shared/static/wasm/sx/hs-parser.sx

@@ -63,6 +63,7 @@
                 (let
                   ((prop (get (adv!) "value")))
                   (parse-prop-chain (list (quote .) owner prop))))
+              ((= typ "style") (do (adv!) (list (quote style) val owner)))
               (true owner)))))
       (define
         parse-prop-chain