Menu structure review

[topfunplusnew]

Implement frontend normalization for dynamic routes to fix issues with duplicate names, invalid paths, and names containing slashes.

The backend-provided menu data sometimes contains path with double slashes (e.g., //baseInfo), name attributes with slashes (e.g., /baseInfo, System/giftInventory), or duplicate name values (e.g., Order, Voucher, CustomerTotal). These issues lead to Vue Router 3 warnings, incorrect route matching, keep-alive caching problems, and navigation failures. This PR adds a preprocessing step in permission.js to automatically sanitize these fields, ensuring robust dynamic route generation without requiring backend changes.

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[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
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