Mem-Client: MDS File Suffix Convention

MDS support files must use canonical suffixes.

Rationale:
- Consistent suffixes improve discoverability and tooling conventions.

Scope:
- PR review policy for new support files under `domains/frontend/mem-client/src/mds/components/**`.

Trigger:
- A PR adds style/type/story support files in scope.

Approval checks:
1) Style files use `*.style.tsx`.
2) Type files use `*.types.ts`.
3) Story files use `*.stories.tsx`.

Evidence:
- New file paths in diff follow required suffixes.

Decision:
- Return NOT APPROVED when trigger is met and any required suffix convention is violated.