[fix](trx-frontend-http): hide rig selector when logged out

Keep the top bar visible for unauthenticated users, but\nhide the rig selector until a session is established.\n\nCo-authored-by: Codex <codex@openai.com>

Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js

@@ -330,6 +330,7 @@ let overviewPeakHoldMs = Number(loadSetting("overviewPeakHoldMs", 2000));
 function syncTopBarAccess() {
   const loggedOut = authEnabled && !authRole;
   const tabBar = document.getElementById("tab-bar");
+  const rigSwitch = document.querySelector(".header-rig-switch");
   if (tabBar) tabBar.style.display = "";
 
   document.querySelectorAll(".tab-bar .tab").forEach((btn) => {
@@ -338,6 +339,10 @@ function syncTopBarAccess() {
     btn.disabled = false;
   });
 
+  if (rigSwitch) {
+    rigSwitch.style.display = loggedOut ? "none" : "";
+  }
+
   if (headerRigSwitchSelect) {
     headerRigSwitchSelect.disabled = loggedOut || authRole === "rx" || lastRigIds.length === 0;
   }