Add ONE-OS Web legacy prototypes and sidebar menu folder.

Import desktop web originals into dedicated prototypes with a shared legacy shell, sync script, and a new「ONE-OS Web 端」sidebar section for review alongside existing refactored pages.

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -9,6 +9,7 @@
     "dev": "node scripts/sync-vendor-if-present.mjs && vite",
     "start": "npm run dev",
     "metadata:sync": "node scripts/sync-project-metadata.mjs",
+    "oneos-web:sync": "node scripts/sync-oneos-web-prototypes.mjs && node scripts/scan-entries.js && npm run metadata:sync",
     "build": "node scripts/sync-vendor-if-present.mjs && node scripts/scan-entries.js && node scripts/build-all.js",
     "preview": "vite preview",
     "typecheck": "node scripts/sync-vendor-if-present.mjs && tsc --noEmit -p tsconfig.typecheck.json",