test: introduce frontend unit testing foundation (#529)

package.json

@@ -9,6 +9,9 @@
     "prebuild": "npm run build:icons",
     "build": "vite build",
     "preview": "vite preview --port 5050",
+    "test": "vitest",
+    "test:run": "vitest run",
+    "test:coverage": "vitest run --coverage",
     "typecheck": "vue-tsc --noEmit",
     "lint": "eslint . -c .eslintrc.js --fix --ext .ts,.js,.vue,.tsx,.jsx",
     "build:icons": "tsc -b src/@iconify && node src/@iconify/build-icons.js",
@@ -20,6 +23,10 @@
       "dist/**/*"
     ]
   },
+  "resolutions": {
+    "vitest/**/vite": "5.4.18",
+    "vitest/vite": "5.4.18"
+  },
   "dependencies": {
     "@fullcalendar/core": "^6.1.15",
     "@fullcalendar/daygrid": "^6.1.15",
@@ -57,7 +64,7 @@
     "markdown-it-link-attributes": "^4.0.1",
     "mousetrap": "^1.6.5",
     "nprogress": "^0.2.0",
-    "pinia": "^3.0.1",
+    "pinia": "^3.0.4",
     "pinia-plugin-persistedstate": "^4.2.0",
     "qrcode": "^1.5.4",
     "sass": "^1.83.4",
@@ -82,7 +89,12 @@
     "@iconify/vue": "^4.3.0",
     "@intlify/unplugin-vue-i18n": "^6.0.3",
     "@originjs/vite-plugin-federation": "^1.4.1",
+    "@pinia/testing": "1.0.3",
     "@tailwindcss/aspect-ratio": "^0.4.2",
+    "@testing-library/dom": "9.3.4",
+    "@testing-library/jest-dom": "6.9.1",
+    "@testing-library/user-event": "14.6.1",
+    "@testing-library/vue": "8.1.0",
     "@types/body-scroll-lock": "^3.1.2",
     "@types/lodash-es": "^4.17.12",
     "@types/markdown-it": "^14.1.2",
@@ -96,6 +108,9 @@
     "@typescript-eslint/parser": "^8.20.0",
     "@vitejs/plugin-vue": "^5.0.4",
     "@vitejs/plugin-vue-jsx": "^4.1.1",
+    "@vitest/coverage-v8": "3.2.7",
+    "@vue/compiler-dom": "3.5.13",
+    "@vue/test-utils": "2.4.11",
     "autoprefixer": "^10.4.14",
     "eslint": "^9.18.0",
     "eslint-import-resolver-typescript": "^3.5.1",
@@ -105,6 +120,8 @@
     "eslint-plugin-sonarjs": "^3.0.1",
     "eslint-plugin-unicorn": "^56.0.1",
     "eslint-plugin-vue": "^9.12.0",
+    "jsdom": "26.1.0",
+    "msw": "2.15.0",
     "postcss": "^8.5.1",
     "postcss-html": "^1.5.0",
     "stylelint": "^16.13.2",
@@ -123,6 +140,7 @@
     "vite-plugin-top-level-await": "^1.5.0",
     "vite-plugin-vue-layouts": "^0.11.0",
     "vite-plugin-vuetify": "2.0.4",
+    "vitest": "3.2.7",
     "vue-shepherd": "^4.1.0",
     "vue-tsc": "^2.0.10",
     "workbox-build": "^7.3.0",