feat: test coverage of ComboControl and CheckboxFilter

vitest.setup.component.ts

@@ -3,10 +3,29 @@ import { cleanup } from '@testing-library/svelte';
 import {
     afterEach,
     expect,
+    vi,
 } from 'vitest';
 
+// Import Tailwind CSS styles for component tests
+import '$app/styles/app.css';
+
 expect.extend(matchers);
 
 afterEach(() => {
     cleanup();
 });
+
+// Mock window.matchMedia for components that use it
+Object.defineProperty(window, 'matchMedia', {
+    writable: true,
+    value: vi.fn().mockImplementation((query: string) => ({
+        matches: false,
+        media: query,
+        onchange: null,
+        addListener: vi.fn(),
+        removeListener: vi.fn(),
+        addEventListener: vi.fn(),
+        removeEventListener: vi.fn(),
+        dispatchEvent: vi.fn(),
+    })),
+});