fix(home): 放大搜索栏右侧图标

lib/pages/home/widgets/home_grid_header.dart

@@ -142,6 +142,7 @@ class HomeGridHeader extends StatelessWidget {
           const SizedBox(width: AppDimens.spaceSm),
           _headerAction(
             key: const Key('home-vip-entry'),
+            frameKey: const Key('home-vip-icon-frame'),
             icon: Icons.workspace_premium_outlined,
             color: AppColors.homeCrownGold,
             tooltip: l10n.vipMembership,
@@ -150,6 +151,7 @@ class HomeGridHeader extends StatelessWidget {
           const SizedBox(width: AppDimens.homeActionGap),
           _headerAction(
             key: const Key('home-wallet-entry'),
+            frameKey: const Key('home-wallet-icon-frame'),
             icon: Icons.card_giftcard_rounded,
             color: AppColors.homeGiftPink,
             tooltip: l10n.wallet,
@@ -163,6 +165,7 @@ class HomeGridHeader extends StatelessWidget {
 
   Widget _headerAction({
     required Key key,
+    required Key frameKey,
     required IconData icon,
     required Color color,
     required String tooltip,
@@ -182,10 +185,16 @@ class HomeGridHeader extends StatelessWidget {
                 child: InkWell(
                   key: key,
                   onTap: onTap,
-                  child: Icon(
-                    icon,
-                    size: AppDimens.homeActionIcon,
-                    color: color,
+                  child: Center(
+                    child: SizedBox.square(
+                      key: frameKey,
+                      dimension: AppDimens.homeActionIcon,
+                      child: Icon(
+                        icon,
+                        size: AppDimens.homeActionIcon,
+                        color: color,
+                      ),
+                    ),
                   ),
                 ),
               ),
@@ -194,8 +203,8 @@ class HomeGridHeader extends StatelessWidget {
           if (badge != null && badge > 0)
             Positioned(
               key: const Key('home-wallet-badge'),
-              top: -5,
-              right: -6,
+              top: 0,
+              right: 0,
               child: Container(
                 constraints: const BoxConstraints(minWidth: 20, minHeight: 16),
                 padding: const EdgeInsets.symmetric(horizontal: 5),