style(mine): 重构紧凑 VIP 会员入口

test/mine/mine_preview_layout_test.dart

@@ -173,10 +173,10 @@ void main() {
       AppColors.vipCardMiddle,
       AppColors.vipCardEnd,
     ]);
-    expect(vipDecoration.border, isNotNull);
+    expect(vipDecoration.border, isNull);
     expect(vipDecoration.boxShadow, isNotEmpty);
 
-    // 卡片高度由内容撑开，上下内边距必须一致（边框各占 1pt）。
+    // 卡片高度由内容撑开，身份头部与底部 CTA 都保留安全内边距。
     final vipRect = tester.getRect(find.byKey(const Key('mine-vip')));
     final emblemRect = tester.getRect(find.byKey(const Key('mine-vip-emblem')));
     final benefitsRect = tester.getRect(
@@ -184,12 +184,12 @@ void main() {
     );
     final topInset = emblemRect.top - vipRect.top;
     final bottomInset = vipRect.bottom - benefitsRect.bottom;
-    expect(topInset, closeTo(bottomInset, 0.01));
     expect(topInset, greaterThanOrEqualTo(AppDimens.mineVipPadding));
+    expect(bottomInset, greaterThanOrEqualTo(AppDimens.mineVipPadding));
     expect(find.byKey(const Key('mine-vip-emblem')), findsOneWidget);
     expect(
       tester.getSize(find.byKey(const Key('mine-vip-open'))).height,
-      greaterThanOrEqualTo(AppDimens.tapTarget),
+      greaterThanOrEqualTo(AppDimens.mineVipButtonHeight),
     );
     const benefitKeys = [
       Key('mine-vip-benefit-0'),
@@ -200,10 +200,18 @@ void main() {
     final benefitTops = benefitKeys
         .map((key) => tester.getTopLeft(find.byKey(key)))
         .toList();
-    expect(benefitTops.map((position) => position.dy).toSet(), hasLength(1));
     expect(
-      benefitTops.map((position) => position.dx).toSet(),
-      hasLength(benefitKeys.length),
+      benefitTops.take(2).map((position) => position.dy).toSet(),
+      hasLength(1),
+    );
+    expect(
+      benefitTops.skip(2).map((position) => position.dy).toSet(),
+      hasLength(1),
+    );
+    expect(benefitTops[2].dy, greaterThan(benefitTops[0].dy));
+    expect(
+      benefitTops.take(2).map((position) => position.dx).toSet(),
+      hasLength(2),
     );
 
     final order = [