refactor(twenty-front): unify Favorites and Workspace navigation menu item code (#18697)
## Summary
- Consolidate duplicated Favorites and Workspace navigation menu item
frontend code into a single unified codebase within
`navigation-menu-item/`
- Move all DnD-related code from `navigation/` module into
`navigation-menu-item/display/dnd/`, renaming `workspaceDndKit*` files
to `navigationMenuItemDndKit*`
- Unify duplicated components (DnD providers, DnD hooks, folder
components, orphan items, section shell) using a `NavigationSections`
enum to parameterize section-specific behavior
- Rename residual workspace-prefixed symbols
(`WorkspaceDndKitSortableItem`, `WorkspaceDndKitDroppableSlot`,
`useWorkspaceSectionItems`, etc.) to `navigationMenuItem`-prefixed
equivalents
- Clean `navigation/` module to only contain app-level concerns (drawer
layout, settings, routing)
### Key changes
| Before (duplicated) | After (unified) |
|---|---|
| `FavoritesDndKitProvider` + `WorkspaceDndKitProvider` |
`NavigationMenuItemDndKitProvider` with `section` prop |
| `useFavoritesDndKit` + `useWorkspaceDndKit` |
`useNavigationMenuItemDndKit(section)` |
| `FavoritesFolderItem` + `WorkspaceNavigationMenuItemsFolder` |
`NavigationMenuItemFolder` with `section` prop |
| `FavoritesOrphanItems` | `NavigationMenuItemOrphanItems` with
`section` prop |
| Separate section shells | Shared `NavigationMenuItemSection` with thin
wrappers |
| `WorkspaceDndKitSortableItem` | `NavigationMenuItemSortableItem` |
| `WorkspaceDndKitDroppableSlot` | `NavigationMenuItemDroppableSlot` |
| `useWorkspaceSectionItems` | `useNavigationMenuItemSectionItems` |
| `useWorkspaceFolderOpenState` | `useNavigationMenuItemFolderOpenState`
|
Net result: **~1650 lines deleted** across 51 files.
## Test plan
- [x] `npx nx typecheck twenty-front` passes
- [x] `npx nx lint twenty-front` passes (0 errors)
- [x] `npx nx test twenty-front` passes (763 suites, 4467 tests)
- [ ] Smoke test: Favorites section renders, DnD reorder works, folder
create/rename/delete works
- [ ] Smoke test: Workspace section renders, edit mode works, DnD
reorder works
- [ ] Smoke test: Add-to-navigation from side panel works for both
sections
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