refactor: refreshed packages and code; adjusted settings and updated config files

package.json

@@ -6,28 +6,28 @@
   "scripts": {
     "dev": "vite",
     "build": "vue-tsc --noEmit && vite build",
-    "preview": "vite preview",
+    "preview": "yarn build && vite preview",
     "deploy": "yarn build && firebase deploy --only hosting",
     "lint": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs,.ts,.tsx,.cts,.mts --fix --ignore-path .gitignore",
     "format": "prettier --write src/"
   },
   "dependencies": {
-    "axios": "^1.6.2",
-    "pinia": "^2.1.7",
-    "sass": "^1.69.5",
+    "pinia": "^3.0.4",
+    "sass": "^1.87.0",
     "vue": "^3.3.11",
-    "vue-router": "4.2.5"
+    "vue-router": "5.0.4"
   },
   "devDependencies": {
-    "@types/vue-router": "^2.0.0",
-    "@vitejs/plugin-vue": "^4.5.2",
-    "@vue/eslint-config-prettier": "^8.0.0",
-    "@vue/eslint-config-typescript": "^12.0.0",
-    "eslint": "^8.55.0",
-    "eslint-plugin-vue": "^9.19.2",
-    "prettier": "^3.1.1",
-    "typescript": "^5.3.3",
-    "vite": "^5.0.7",
-    "vue-tsc": "^2.0.29"
+    "@tsconfig/node24": "^24.0.4",
+    "@types/node": "^25.6.0",
+    "@vitejs/plugin-vue": "^6.0.5",
+    "@vue/tsconfig": "^0.9.1",
+    "prettier": "3.8.2",
+    "typescript": "~6.0.0",
+    "vite": "^8.0.3",
+    "vue-tsc": "^3.2.6"
+  },
+  "engines": {
+    "node": "^20.19.0 || >=22.12.0"
   }
 }