Hide shortcut key on Android.

src/components/Search.vue

@@ -63,7 +63,9 @@ const searchIndex = ref(0)
 const searchInputRef = ref(null)
 let previewTimer = null
 
-const shortcut = /Mac/.test(navigator.userAgent) ? '⌘F'
+// Note: Android is also Linux. HarmonyOS 5 doesn't include "Linux".
+const shortcut = /Android/.test(navigator.userAgent) ? ''
+  : /Mac/.test(navigator.userAgent) ? '⌘F'
   : /Windows|Linux/.test(navigator.userAgent) ? 'Ctrl+F'
   : ''