fix: ViewDesigner test assertion - use bg-primary instead of border-primary to avoid substring match with hover:border-primary/50

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/plugin-designer/src/__tests__/ViewDesigner.test.tsx

@@ -223,7 +223,7 @@ describe('ViewDesigner', () => {
       expect(kanbanBtn.className).toContain('border-primary');
 
       const gridBtn = screen.getByTestId('view-type-grid');
-      expect(gridBtn.className).not.toContain('border-primary');
+      expect(gridBtn.className).not.toContain('bg-primary');
     });
 
     it('should not change type in read-only mode', () => {