chore: upgrade vite to 8 and related tooling

- vite 5 → 8
- vite-plugin-pwa 0.19 → 1.2 (vite 8 compat confirmed via vite-pwa/vite-plugin-pwa#918)
- @vitejs/plugin-vue 5 → 6
- vitest 1 → 4
- @vitest/browser, @vitest/ui 1 → 4
- workbox-build, workbox-window added as direct deps at ^7.4.0 to satisfy vite-plugin-pwa peer reqs

package.json

@@ -38,9 +38,9 @@
     "@types/jsdom": "^27.0.0",
     "@types/md5": "^2.3.6",
     "@types/node": "^25.0.10",
-    "@vitejs/plugin-vue": "^5.0.4",
-    "@vitest/browser": "^1.3.0",
-    "@vitest/ui": "^1.3.0",
+    "@vitejs/plugin-vue": "^6.0.5",
+    "@vitest/browser": "^4.1.2",
+    "@vitest/ui": "^4.1.2",
     "@vue/eslint-config-prettier": "^9.0.0",
     "@vue/eslint-config-typescript": "^12.0.0",
     "@vue/test-utils": "^2.4.4",
@@ -53,10 +53,12 @@
     "prettier": "^3.8.1",
     "sass": "^1.97.3",
     "typescript": "~5.9.3",
-    "vite": "^5.4.21",
-    "vite-plugin-pwa": "^0.19.0",
-    "vitest": "^1.3.0",
+    "vite": "^8.0.3",
+    "vite-plugin-pwa": "^1.2.0",
+    "vitest": "^4.1.2",
     "vue-tsc": "^3.2.3",
-    "webdriverio": "^8.32.2"
+    "webdriverio": "^8.32.2",
+    "workbox-build": "^7.4.0",
+    "workbox-window": "^7.4.0"
   }
 }