N°8641 - Dashboard editor front-end first commit for Form SDK integration.

* No dashlet edition
* Dashboard are not persisted
* Unable to load a dashboard from an endpoint (refresh)
* Grid library need proper npm integration

node_modules/gridstack/dist/vitest.setup.js

@@ -0,0 +1,90 @@
+import '@testing-library/jest-dom';
+// Global test setup
+// This file runs before each test file
+// Mock DOM APIs that might not be available in jsdom
+Object.defineProperty(window, 'matchMedia', {
+    writable: true,
+    value: vi.fn().mockImplementation(query => ({
+        matches: false,
+        media: query,
+        onchange: null,
+        addListener: vi.fn(),
+        removeListener: vi.fn(),
+        addEventListener: vi.fn(),
+        removeEventListener: vi.fn(),
+        dispatchEvent: vi.fn(),
+    })),
+});
+// Mock ResizeObserver
+globalThis.ResizeObserver = vi.fn().mockImplementation(() => ({
+    observe: vi.fn(),
+    unobserve: vi.fn(),
+    disconnect: vi.fn(),
+}));
+// Mock IntersectionObserver  
+globalThis.IntersectionObserver = vi.fn().mockImplementation(() => ({
+    observe: vi.fn(),
+    unobserve: vi.fn(),
+    disconnect: vi.fn(),
+}));
+// Mock requestAnimationFrame
+globalThis.requestAnimationFrame = vi.fn().mockImplementation((cb) => {
+    return setTimeout(cb, 0);
+});
+globalThis.cancelAnimationFrame = vi.fn().mockImplementation((id) => {
+    clearTimeout(id);
+});
+// Mock performance.now for timing-related tests
+Object.defineProperty(window, 'performance', {
+    writable: true,
+    value: {
+        now: vi.fn(() => Date.now())
+    }
+});
+// Mock CSS properties that might be used by gridstack
+Object.defineProperty(window, 'getComputedStyle', {
+    value: () => ({
+        getPropertyValue: () => '',
+        width: '100px',
+        height: '100px',
+        marginTop: '0px',
+        marginBottom: '0px',
+        marginLeft: '0px',
+        marginRight: '0px'
+    })
+});
+// Mock scrollTo for tests that might trigger scrolling
+window.scrollTo = vi.fn();
+// Setup DOM environment
+Object.defineProperty(window, 'location', {
+    value: {
+        href: 'http://localhost:3000',
+        origin: 'http://localhost:3000',
+        pathname: '/',
+        search: '',
+        hash: ''
+    },
+    writable: true
+});
+// Global test utilities
+globalThis.createMockElement = (tagName = 'div', attributes = {}) => {
+    const element = document.createElement(tagName);
+    Object.entries(attributes).forEach(([key, value]) => {
+        element.setAttribute(key, value);
+    });
+    return element;
+};
+// Console error/warning suppression for expected errors in tests
+const originalError = console.error;
+const originalWarn = console.warn;
+beforeEach(() => {
+    // Reset console methods for each test
+    console.error = originalError;
+    console.warn = originalWarn;
+});
+// Helper to suppress expected console errors/warnings
+globalThis.suppressConsoleErrors = () => {
+    console.error = vi.fn();
+    console.warn = vi.fn();
+};
+//# sourceMappingURL=vitest.setup.js.map