branding added

lib/widgets/practice_chrome.dart

@@ -1,4 +1,4 @@
-/// Shared layout chrome for Values Sort screens.
+/// Shared layout chrome for Values Compass screens.
 library;
 
 import 'package:flutter/material.dart';
@@ -44,7 +44,7 @@ class PracticeScaffold extends StatelessWidget {
                       child: ThemeToggleButton(),
                     ),
                   ),
-                if (header != null) header!,
+                ?header,
                 Expanded(
                   child: Padding(
                     padding: pad,
@@ -76,23 +76,27 @@ class BrandMark extends StatelessWidget {
 
     return Row(
       children: [
-        ClipOval(
+        ClipRRect(
+          borderRadius: BorderRadius.circular(8),
           child: Image.asset(
-            'assets/images/emblem.png',
+            'assets/images/app_icon.png',
             width: 32,
             height: 32,
             fit: BoxFit.cover,
             errorBuilder: (_, _, _) => Container(
               width: 32,
               height: 32,
-              color: colors.primaryContainer,
-              child: Icon(Icons.spa, size: 18, color: colors.onPrimary),
+              decoration: BoxDecoration(
+                color: colors.primaryContainer,
+                borderRadius: BorderRadius.circular(8),
+              ),
+              child: Icon(Icons.explore, size: 18, color: colors.onPrimary),
             ),
           ),
         ),
         const SizedBox(width: 8),
         Text(
-          'VALUES SORT',
+          'VALUES COMPASS',
           style: labels.labelSmall?.copyWith(
             letterSpacing: 2.2,
             color: colors.onSurfaceVariant,