[fix](trx-frontend-http): redirect to login when navigating to protected tabs unauthenticated, right-align recorder table buttons

Show the auth gate instead of silently blocking navigation to non-main
tabs when not logged in. Also fix recorder file table layout so the file
column takes full width and action buttons are right-aligned.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

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

@@ -4433,7 +4433,10 @@ function updateTabHistory(name, replaceHistory = false) {
 
 function navigateToTab(name, options = {}) {
   const { updateHistory = true, replaceHistory = false } = options;
-  if (authEnabled && !authRole && name !== "main") return;
+  if (authEnabled && !authRole && name !== "main") {
+    showAuthGate(false);
+    return;
+  }
   const btn = document.querySelector(`.tab-bar .tab[data-tab="${name}"]`);
   if (!btn) return;
   _activeTab = name;