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- Fixes the "Minecraft identity verification is unavailable" errors: the backend now retries transient Mojang session-server failures with a per-attempt timeout, and the client makes a full second attempt before giving up. - Your session is now remembered across game restarts (for up to a week), so identity verification runs rarely instead of on every launch. - Fixes a startup crash on Minecraft 1.21.6-1.21.8 (the 0.1.2 jar for those versions could crash the game at boot). - Clearer errors everywhere: dialogs now show what actually went wrong (including offline/unreachable-backend detection) instead of generic connection errors. - Automatic recovery: world uploads/downloads retry transient network failures, the final snapshot upload retries up to 5 times with backoff before asking you, and a host that loses the backend shows reconnecting" instead of silently pretending all is well. - Guests waiting for a host see a "still trying" notice during backend hiccups instead of a frozen screen, and stuck world-release states now time out instead of waiting forever.