HS: wip — parser every-fix, integration boot, test tooling expansion

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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

@@ -115,8 +115,13 @@
             (dom-set-data el "hs-script" src)
             (dom-set-data el "hs-active" true)
             (dom-set-attr el "data-hyperscript-powered" "true")
+            (host-set! (host-global "window") "__hs_current_me" el)
             (guard
-              (_e (true nil))
+              (_e
+                (true
+                  (do
+                    (dom-dispatch el "hyperscript:parse-error" {:detail {:errors (list _e)}})
+                    nil)))
               (let
                 ((handler (hs-handler src)))
                 (let
@@ -130,6 +135,7 @@
                         safe-handler
                         (hs-query-all (or comp-name "")))
                       (safe-handler el))))))
+            (host-set! (host-global "window") "__hs_current_me" nil)
             (dom-dispatch el "hyperscript:after:init" nil)))))))
 
 ;; ── Boot subtree: for dynamic content ───────────────────────────