Centralize AUTH_TIMEOUT_MS constant in config.ts to ensure consistency

Improve time message formatting to show seconds when under 1 minute

Fix timeout error message to reflect 10 minutes instead of 5

Extend OAuth authorization timeout from 5 to 10 minutes and return dynamic expires_in

Polish: use non-null assertion and fix comment clarity

Fix: cleanup authorization state when transitioning to authorized in getValidAccessToken

Refactor: extract cleanupAuthorizationState helper and improve method naming

Refactor: add isValidPendingState helper and clear currentState in revokeAuthorization

Address code review: add state validation and inconsistent state handling

Improve OAuth authorization flow UX: make get_auth_url idempotent and return auth_url in pending state

Add MCP Resource for iCalendar TRIGGER and RRULE Format Reference

Update src/resources/terminology.ts

docs: Add inbox vs project guidance in create_task tool

docs: Clarify inbox role in terminology resource

feat: Add bilingual terminology support for Chinese users