- Add FallbackState interface to track message removal attempts
- Implement getLastMessagePair() to identify last user+assistant message pair
- Add executeRevertFallback() to remove message pairs when compaction fails
- Configure max 3 revert attempts with min 2 messages requirement
- Trigger fallback after 5 compaction retries exceed
- Reset retry counter on successful message removal for fresh compaction attempt
- Clean fallback state on session deletion
Resolves: When massive context (context bomb) is loaded, compaction fails and session becomes completely broken. Now falls back to emergency message removal after all retry attempts fail, allowing session recovery.
🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)
Implements retry logic with up to 5 attempts when compaction fails.
Uses exponential backoff strategy (2s → 4s → 8s → 16s → 30s).
Shows toast notifications for retry status and final failure.
Prevents infinite loops by clearing state after max attempts.
🤖 GENERATED WITH ASSISTANCE OF OhMyOpenCode
