Fix value-select: include SELECT element value in GET requests

sx.js only appended INPUT values to GET request URLs. SELECT and
TEXTAREA elements with a name attribute were silently ignored,
so the category parameter was never sent.

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

shared/static/scripts/sx.js

@@ -1817,8 +1817,8 @@
           var qs = new URLSearchParams(new FormData(form2)).toString();
           if (qs) url += (url.indexOf("?") >= 0 ? "&" : "?") + qs;
         }
-        // Also handle search inputs with name attr
-        if (el.tagName === "INPUT" && el.name) {
+        // Also handle inputs/selects/textareas with name attr
+        if ((el.tagName === "INPUT" || el.tagName === "SELECT" || el.tagName === "TEXTAREA") && el.name) {
           var param = encodeURIComponent(el.name) + "=" + encodeURIComponent(el.value);
           url += (url.indexOf("?") >= 0 ? "&" : "?") + param;
         }