feat:更新主题颜色布局

lib/pages/home_page.dart

@@ -7,26 +7,18 @@ class HomePage extends StatelessWidget {
   Widget build(BuildContext context) {
     return ScaffoldPage.withPadding(
       header: const PageHeader(
-        title: Text('首页'),
+        title: Text('首页', style: TextStyle(color: Colors.white)),
       ),
       content: Center(
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            Icon(
-              FluentIcons.home,
-              size: 64,
-            ),
+            Icon(FluentIcons.home, size: 64, color: Colors.white),
             const SizedBox(height: 20),
-            Text(
-              '首页',
-              style: TextStyle(
-                fontSize: 24,
-              ),
-            ),
+            Text('首页', style: TextStyle(fontSize: 24, color: Colors.white)),
           ],
         ),
       ),
     );
   }
-}
+}