fix: remove escapeHtml() from textContent assignment on view label

textContent is inherently XSS-safe and does not interpret HTML entities.
Wrapping with escapeHtml() caused literal entity strings (e.g., &)
to display instead of the intended characters (e.g., &) for view names
containing special characters like &, <, or >.

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Co-Authored-By: Amplifier <240397093+microsoft-amplifier@users.noreply.github.com>

muxplex/frontend/app.js

@@ -859,7 +859,7 @@ function renderViewDropdown() {
     } else if (_activeView === 'hidden') {
       label.textContent = 'Hidden';
     } else {
-      label.textContent = escapeHtml(_activeView);
+      label.textContent = _activeView;
     }
   }
 }