fix: Options tab broken — removed footer link crashed init

Removing the footer <a id="btnOptions"> made $('#btnOptions') return
null, causing addEventListener to throw. This killed the rest of
initUnlockedUI(), preventing the Options tab and all subsequent
handlers from being wired up.

https://claude.ai/code/session_01SWSwDfMVij53bCTNSCLMwn

src/popup/popup.js

@@ -208,13 +208,7 @@ async function initUnlockedUI() {
     });
   });
 
-  // Options link (footer)
-  $('#btnOptions').addEventListener('click', (e) => {
-    e.preventDefault();
-    api.runtime.openOptionsPage();
-  });
-
-  // Options tab
+  // Open full options page button (Options tab)
   $('#btnOpenFullOptions').addEventListener('click', () => {
     api.runtime.openOptionsPage();
   });