initial code commit

client/src/__tests__/setup.ts

@@ -0,0 +1,37 @@
+import '@testing-library/jest-dom';
+import { webcrypto } from 'node:crypto';
+import { beforeEach } from 'vitest';
+
+// jsdom lacks WebCrypto subtle — polyfill from Node
+if (!globalThis.crypto?.subtle) {
+  Object.defineProperty(globalThis, 'crypto', { value: webcrypto });
+}
+
+// jsdom lacks ResizeObserver (needed by Recharts)
+class ResizeObserverMock {
+  observe() {}
+  unobserve() {}
+  disconnect() {}
+}
+globalThis.ResizeObserver = ResizeObserverMock as unknown as typeof ResizeObserver;
+
+// structuredClone polyfill for older jsdom
+if (!globalThis.structuredClone) {
+  globalThis.structuredClone = (o: unknown) => JSON.parse(JSON.stringify(o));
+}
+
+// Silence "not implemented: navigation" warnings from jsdom
+const originalWarn = console.warn;
+console.warn = (...args: unknown[]) => {
+  if (typeof args[0] === 'string' && args[0].includes('Not implemented')) return;
+  originalWarn(...args);
+};
+
+// Reset cookies between tests
+beforeEach(() => {
+  document.cookie.split(';').forEach((c) => {
+    const name = c.split('=')[0].trim();
+    if (name) document.cookie = `${name}=; max-age=0; path=/`;
+  });
+  localStorage.clear();
+});