chore(deps): upgrade to Vite 8, update all dependencies (#510)

- Upgrade Vite from 7.3.1 to 8.0.0 (2x faster builds via Rolldown)
- Add overrides for vite-plugin-pwa Vite 8 peer dependency (ref #918)
- Convert manualChunks from object to function (Rolldown requirement)
- Update @vitejs/plugin-vue 6.0.4 -> 6.0.5
- Update @types/node 25.3.5 -> 25.5.0
- Update esbuild 0.27.3 -> 0.27.4
- Update sass 1.97.3 -> 1.98.0
- Update vite-plugin-vue-devtools 8.0.7 -> 8.1.0
- Update Python cachetools 7.0.4 -> 7.0.5

Author: Serph91P