修复泥点弹窗透明问题

为泥点消耗确认弹窗补齐平台主题作用域和模态面板样式

让平台状态弹窗合并默认主题遮罩，避免自定义遮罩覆盖主题变量

补充弹窗默认样式测试和团队排障记录

src/components/common/PlatformStatusDialog.test.tsx

@@ -21,6 +21,7 @@ test('renders result state with description and primary action', () => {
   );
 
   const dialog = screen.getByRole('dialog', { name: '支付成功' });
+  const overlay = dialog.parentElement as HTMLElement;
   const badge = dialog.querySelector('.platform-icon-badge');
   const action = screen.getByRole('button', { name: '知道了' });
   const visibleDescription = dialog.querySelector(
@@ -28,6 +29,8 @@ test('renders result state with description and primary action', () => {
   );
 
   expect(dialog).toBeTruthy();
+  expect(overlay.className).toContain('platform-theme--light');
+  expect(overlay.className).toContain('platform-profile-modal-overlay');
   expect(visibleDescription?.textContent).toBe('账户状态已刷新');
   expect(badge?.className).toContain('text-[var(--platform-success-text)]');
   expect(action.className).toContain('platform-primary-button');
@@ -97,6 +100,27 @@ test('supports custom badge icon label and action button styling', () => {
   expect(action.className).toContain('bg-slate-950');
 });
 
+test('keeps default theme classes when callers customize the overlay', () => {
+  render(
+    <PlatformStatusDialog
+      status="error"
+      title="发布失败"
+      description="图片生成失败"
+      onClose={vi.fn()}
+      overlayClassName="bg-slate-950/58 custom-overlay"
+      action={{ label: '知道了', onClick: vi.fn(), surface: 'platform' }}
+    />,
+  );
+
+  const dialog = screen.getByRole('dialog', { name: '发布失败' });
+  const overlay = dialog.parentElement as HTMLElement;
+
+  expect(overlay.className).toContain('platform-theme--light');
+  expect(overlay.className).toContain('platform-profile-modal-overlay');
+  expect(overlay.className).toContain('bg-slate-950/58');
+  expect(overlay.className).toContain('custom-overlay');
+});
+
 test('supports header notice layout with body content and close button', () => {
   const onClose = vi.fn();