style(home): 放大底部导航图标与文字

test/theme/app_dimens_test.dart

@@ -18,13 +18,13 @@ void main() {
     expect(AppDimens.listTitle, 15);
     expect(AppDimens.sectionTitle, 16);
     expect(AppDimens.pageTitle, 20);
-    expect(AppDimens.navLabel, 11);
-    expect(AppDimens.navLabelGap, 4);
-    expect(AppDimens.navIcon, 26);
+    expect(AppDimens.navLabel, 13);
+    expect(AppDimens.navLabelGap, 5);
+    expect(AppDimens.navIcon, 30);
     expect(AppDimens.buttonHeight, 48);
     expect(AppDimens.primaryButtonHeight, 52);
     expect(AppDimens.tapTarget, 44);
-    expect(AppDimens.navHeight, 56);
+    expect(AppDimens.navHeight, 62);
     expect(AppDimens.progressHeight, 3);
   });
 }