Fixed three critical issues identified in code review:
1. Race condition with store access: Added storeMutex and storeActive
flag to prevent background flush goroutine from accessing closed
store. Background timer now safely checks if store is active before
attempting flush operations.
2. Missing auto-flush in import: Added markDirtyAndScheduleFlush()
call after import completes, ensuring imported issues sync to JSONL.
3. Timer cleanup: Explicitly set flushTimer to nil after Stop() to
prevent resource leaks.
Testing confirmed all fixes working:
- Debounced flush triggers after 5 seconds of inactivity
- Immediate flush on process exit works correctly
- Import operations now trigger auto-flush
- No race conditions detected
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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