fix(CollaboratorAvatarGroup): canonicalize User.border_color → borderColor

[leecalcote]

Summary

Renames the last remaining snake_case identifier on Sistent's consumer-facing API: `User.border_color` → `User.borderColor` on the `Users` prop interface for `CollaboratorAvatarGroup`.

Phase 7c (commit `3a18882d`) deferred this rename on the grounds that it would be a public Sistent API break. That carve-out has stopped being load-bearing now that we've established the coordinated-rename pattern via #1484 (`useRoomActivity({ provider_url → providerUrl })`): rename the Sistent contract → ship a Sistent release → bump consumers in lockstep. We own the project; canonicalizing the last consumer-facing snake_case identifier is exactly what the contract is for.

Changes

• `User.border_color: string` → `User.borderColor: string` on the exported `Users` prop interface (`CollaboratorAvatarGroup.tsx:42`).
• Both `` call sites updated to read `user.borderColor` (visible avatar group at line 196, popup-overflow list at line 245).
• JSDoc example + `@property` doc comments updated to match.

Diff: 5 lines changed in 1 file.

Test plan

• `npx jest` — 29/29 passing.
• `grep -rn "border_color" src/` — no matches.
• Once the next Sistent release ships, smoke-test `CollaboratorAvatarGroup` in Kanvas: open a design in two tabs and verify the borders on collaborator avatars render with their assigned colors.

Coordinated consumer flips

After this PR ships in a Sistent release and `@sistent/sistent` is bumped in extensions:

• `meshery-extensions/meshmap/collaborators/app.tsx:59` is the only call site building a `Users` map for `` — flips `border_color: user.border_color` → `borderColor: user.borderColor` in the same PR as the Sistent bump (matching the pattern in meshery-extensions#4221).

No other downstream consumers identified by cluster-wide audit.

References

• layer5io/sistent#1484 — coordinated-rename pattern this PR follows.
• `meshery/schemas` identifier-naming contract — TypeScript property: camelCase everywhere.

[Copilot]

Pull request overview

This PR updates CollaboratorAvatarGroup’s public-facing users prop shape to use canonical camelCase by renaming the remaining snake_case field border_color to borderColor, aligning with the broader identifier-naming contract used across the Sistent ecosystem.

Changes:

• Renamed User.border_color → User.borderColor in the users map type used by CollaboratorAvatarGroup.
• Updated both StyledAvatar call sites to read user.borderColor.
• Updated the JSDoc example and @property documentation to match the new field name.

[gemini-code-assist]

Code Review

This pull request refactors the User interface and its usage within the CollaboratorAvatarGroup component by renaming the border_color property to borderColor to align with camelCase naming conventions. The changes are consistently applied across the interface definition, JSDoc documentation, and component props. There are no review comments to address, and I have no further feedback to provide.