v1.3.10

Added

• Grant expiry tracking — grantedAt is now stamped on first successful OAuth authentication and preserved through every token rotation. On each Homebridge restart the plugin checks the grant age against Volvo's documented limits:
  • 2-week warning — logs a prominent warning with re-auth instructions when fewer than 14 days remain before the 6-month hard expiry.
  • Post-expiry warning — logs immediately if the grant is already past 6 months.
• invalid_grant detection — when a token refresh is rejected by Volvo, the error message now distinguishes between the 7-day stale token limit (Homebridge offline for a week) and the 6-month hard expiry, and links directly to the re-auth flow in the Homebridge UI.

Changed

• All "run the setup tool" error messages updated to point users to Homebridge UI → Plugins → Volvo XC90 → Settings → Re-configure OAuth instead of the terminal.

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