## Summary
Closes#18673
Some languages (e.g., German "Unternehmen") and even English words
(sheep, deer, aircraft, series) have identical singular and plural
forms. Twenty previously blocked saving when labels matched, making it
impossible to correctly name objects in these cases.
- **Labels** are purely display strings — removed the equality
validation from both the frontend Zod schema and backend validator
- **API names** (nameSingular/namePlural) must stay different since they
generate distinct GraphQL resolvers (`findOne` vs `findMany`,
`createOne` vs `createMany`, etc.) and REST endpoints — this validation
is preserved
- Added a shared `computeMetadataNamesFromLabels` util in
`twenty-shared` that auto-appends `'s'` to the plural API name when both
labels produce the same camelCase name (e.g., "Unternehmen" →
`unternehmen` / `unternehmens`)
- Both the frontend form and backend sync-check use the same shared util
— single source of truth, no duplicated logic
**No retroactive impact**: since the old code prevented identical labels
from ever being saved, no existing workspace has `labelSingular ===
labelPlural`.
## Test plan
- [x] New unit tests for `computeMetadataNamesFromLabels` (7 tests:
standard labels, Sheep, Unternehmen, Aircraft, empty labels, different
labels, applyCustomSuffix)
- [x] Updated frontend schema validation tests (identical labels with
different names now passes; identical names still fails)
- [x] Updated backend integration test cases (removed identical-label
failing cases)
- [ ] Manual: create a new object with identical singular/plural labels
(e.g. "Sheep" / "Sheep") — should save successfully with API names
`sheep` / `sheeps`
- [ ] Manual: verify existing objects with different labels still work
unchanged
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