Restore the inbox tool reminder to refresh rooms when background synchronization is unavailable. Keep Mail read-state and inbox-completion guidance in the shared and bundled catalogs.

Align all three SDK versions and both landing-page languages at 0.12.4, and document the Mail workflow clarification and review fix in the changelog.

Validated all three SDK suites, Mail interoperability, TypeScript build, Rust format and clippy, catalog parity, and bilingual browser demos.

Co-authored-by: Codex <noreply@openai.com>