Add Vitest + React Testing Library setup for viewer-frontend

Establishes frontend unit testing infra (jsdom env, RTL, jest-dom matchers, common Radix/jsdom polyfills) and seeds it with tests for lib/utils.ts, lib/photo-utils.ts, hooks/useFocusTrap.ts, and ThemeToggle.tsx (46 tests total).
2026-07-14 18:35:30 -04:00
parent 05b908241d
commit 975d0c809d
10 changed files with 2303 additions and 30 deletions
@@ -13,6 +13,7 @@
    "isolatedModules": true,
    "jsx": "react-jsx",
    "incremental": true,
+    "types": ["vitest/globals", "@testing-library/jest-dom"],
    "plugins": [
      {
        "name": "next"