fix(home): drop the version badge from the app bar

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

lib/features/home/home_screen.dart

@@ -187,37 +187,11 @@ class _HomeScreenState extends State<HomeScreen> {
   Widget build(BuildContext context) {
     final isDark = Theme.of(context).brightness == Brightness.dark;
     final primaryColor = Theme.of(context).colorScheme.primary;
-    final textSecondary = isDark ? AppTheme.darkTextSecondary : AppTheme.lightTextSecondary;
 
     return Scaffold(
       extendBody: true,
       appBar: AppBar(
         titleSpacing: 16,
-        leading: Padding(
-          padding: const EdgeInsets.only(left: 16),
-          child: Center(
-            child: Container(
-              padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
-              decoration: BoxDecoration(
-                color: (isDark ? Colors.white : Colors.black).withValues(alpha: 0.06),
-                borderRadius: BorderRadius.circular(8),
-                border: Border.all(
-                  color: isDark ? AppTheme.darkBorder : AppTheme.lightBorder,
-                ),
-              ),
-              child: Text(
-                'v1.0.3',
-                style: TextStyle(
-                  fontSize: 11,
-                  fontWeight: FontWeight.w700,
-                  color: textSecondary,
-                  letterSpacing: 0.5,
-                ),
-              ),
-            ),
-          ),
-        ),
-        leadingWidth: 72,
         title: Row(
           mainAxisSize: MainAxisSize.min,
           children: [