add unit tests

package.json

@@ -27,6 +27,9 @@
     "scripts": {
         "clean": "rm -rf dist",
         "build": "yarn clean && vite build && tsc -p tsconfig.build.json && mkdir -p dist/styles && cp src/styles/base.css dist/styles/base.css && tailwindcss -c tailwind.build.config.cjs -i src/styles/components.css -o dist/styles/components.css --minify && tailwindcss -c tailwind.build.config.cjs -i src/styles/utilities.css -o dist/styles/utilities.css --minify && cp tailwind-preset.cjs dist/tailwind-preset.cjs",
+        "test": "vitest run",
+        "test:coverage": "vitest run --coverage --coverage.reporter=lcov --coverage.reporter=text-summary",
+        "test:watch": "vitest",
         "lint": "eslint .",
         "lint:fix": "eslint . --fix",
         "format": "prettier . --write",
@@ -64,13 +67,17 @@
         "@storybook/react": "^10.2.10",
         "@storybook/react-vite": "^10.2.10",
         "@testing-library/dom": "^10.4.1",
+        "@testing-library/jest-dom": "^6.9.1",
+        "@testing-library/react": "^16.3.0",
         "@types/react": "^19.0.0",
         "@types/react-dom": "^19.0.0",
         "@vitejs/plugin-react": "^5.0.0",
+        "@vitest/coverage-v8": "^4.0.18",
         "eslint": "^10",
         "eslint-plugin-react-hooks": "^7.1.0-canary-ab18f33d-20260220",
         "eslint-plugin-react-refresh": "^0.5.1",
         "globals": "^17.3.0",
+        "jsdom": "^28.1.0",
         "postcss": "^8.4.49",
         "prettier": "^3.8.1",
         "react": "^19.0.0",
@@ -81,6 +88,7 @@
         "typescript": "^5.6.2",
         "typescript-eslint": "^8.56.0",
         "vite": "^7.0.0",
+        "vitest": "^4.0.18",
         "yjs": "^13.6.24"
     }
 }