Migrate tests from Jest to Vitest, updating setup and test files accordingly.

- Replace Jest imports and mocks with Vitest equivalents in setup and unit tests.
- Adjust test cases to use async imports and reset modules with Vitest.
- Add Vitest configuration file for test environment setup and coverage reporting.

package.json

@@ -18,9 +18,9 @@
     "prisma:push:force": "prisma db push --force-reset",
     "prisma:studio": "prisma studio",
     "start": "node server.mjs",
-    "test": "jest",
-    "test:watch": "jest --watch",
-    "test:coverage": "jest --coverage",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "test:coverage": "vitest run --coverage",
     "lint:md": "markdownlint-cli2 \"**/*.md\" \"!.trunk/**\" \"!.venv/**\" \"!node_modules/**\"",
     "lint:md:fix": "markdownlint-cli2  --fix \"**/*.md\" \"!.trunk/**\" \"!.venv/**\" \"!node_modules/**\""
   },
@@ -57,31 +57,33 @@
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.1",
     "@eslint/js": "^9.27.0",
-    "@jest/globals": "^30.0.3",
     "@playwright/test": "^1.52.0",
     "@tailwindcss/postcss": "^4.1.7",
+    "@testing-library/dom": "^10.4.0",
+    "@testing-library/react": "^16.3.0",
     "@types/bcryptjs": "^2.4.2",
-    "@types/jest": "^30.0.0",
     "@types/node": "^22.15.21",
     "@types/node-cron": "^3.0.8",
     "@types/react": "^19.1.5",
     "@types/react-dom": "^19.1.5",
     "@typescript-eslint/eslint-plugin": "^8.32.1",
     "@typescript-eslint/parser": "^8.32.1",
+    "@vitejs/plugin-react": "^4.6.0",
     "eslint": "^9.27.0",
     "eslint-config-next": "^15.3.2",
     "eslint-plugin-prettier": "^5.4.0",
-    "jest": "^30.0.3",
+    "jsdom": "^26.1.0",
     "markdownlint-cli2": "^0.18.1",
     "postcss": "^8.5.3",
     "prettier": "^3.5.3",
     "prettier-plugin-jinja-template": "^2.1.0",
     "prisma": "^6.10.1",
     "tailwindcss": "^4.1.7",
-    "ts-jest": "^29.4.0",
     "ts-node": "^10.9.2",
     "tsx": "^4.20.3",
-    "typescript": "^5.0.0"
+    "typescript": "^5.0.0",
+    "vite-tsconfig-paths": "^5.1.4",
+    "vitest": "^3.2.4"
   },
   "prettier": {
     "bracketSpacing": true,