Fix 3 handler examples: put-patch names, value-select keys, active-search primitive

1. Rename ex-pp-* handlers to ex-putpatch-* to match URL slugs
   (putpatch-edit-all, putpatch, putpatch-cancel)
2. Fix value-select-data: keyword keys (:Languages) → string keys
   ("Languages") so request-arg string lookup matches
3. Fix dom-value → element-value in orchestration.sx bind-event
   changed modifier (dom-value was never defined, element-value is)

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

shared/static/wasm/sx/orchestration.sx

@@ -466,7 +466,7 @@
               (when
                 (get mods "changed")
                 (let
-                  ((val (dom-value el)))
+                  ((val element-value))
                   (if
                     (= val last-val)
                     (set! should-fire false)

web/orchestration.sx

@@ -466,7 +466,7 @@
               (when
                 (get mods "changed")
                 (let
-                  ((val (dom-value el)))
+                  ((val element-value))
                   (if
                     (= val last-val)
                     (set! should-fire false)