Polish Files UI and scope search to mobile-only transfers/files.

Remove desktop header search, wire mobile search to the transfers and files page, refine file icons and Shared badge, and align Transfers toolbar with Files.

Co-authored-by: Cursor <cursoragent@cursor.com>

resources/views/layouts/user.blade.php

@@ -257,15 +257,6 @@ document.addEventListener('alpine:init', () => {
         },
     }));
 });
-
-// Global "/" shortcut to focus search
-document.addEventListener('keydown', (e) => {
-    if (e.key === '/' && !['INPUT','TEXTAREA','SELECT'].includes(document.activeElement.tagName) && !document.activeElement.isContentEditable) {
-        e.preventDefault();
-        const input = document.querySelector('[x-data*="topbarSearch"] input');
-        if (input) input.focus();
-    }
-});
 </script>
 @include('partials.afia')
 @include('partials.sso-keepalive')