fix(library): replace library badge text with a folder icon

lib/widgets/in_library_badge.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:spotiflac_android/theme/app_tokens.dart';
 import 'package:spotiflac_android/l10n/l10n.dart';
 
-/// Small "In Library" chip shown next to a track that already exists in the
+/// Compact folder badge shown next to a track that already exists in the
 /// local library or download history.
 class InLibraryBadge extends StatelessWidget {
   const InLibraryBadge({super.key});
@@ -10,30 +10,19 @@ class InLibraryBadge extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final colorScheme = Theme.of(context).colorScheme;
-    return Container(
-      padding: context.tokens.badgePadding,
-      decoration: BoxDecoration(
-        color: colorScheme.primaryContainer,
-        borderRadius: context.tokens.borderRadiusBadge,
-      ),
-      child: Row(
-        mainAxisSize: MainAxisSize.min,
-        children: [
-          Icon(
-            Icons.folder_outlined,
-            size: 12,
-            color: colorScheme.onPrimaryContainer,
-          ),
-          const SizedBox(width: 3),
-          Text(
-            context.l10n.libraryInLibrary,
-            style: TextStyle(
-              fontSize: context.tokens.badgeFontSize,
-              fontWeight: FontWeight.w500,
-              color: colorScheme.onPrimaryContainer,
-            ),
-          ),
-        ],
+    return Tooltip(
+      message: context.l10n.libraryInLibrary,
+      child: Container(
+        padding: context.tokens.badgePadding,
+        decoration: BoxDecoration(
+          color: colorScheme.primaryContainer,
+          borderRadius: context.tokens.borderRadiusBadge,
+        ),
+        child: Icon(
+          Icons.folder_outlined,
+          size: 14,
+          color: colorScheme.onPrimaryContainer,
+        ),
       ),
     );
   }