High Priority Fixes:
- Use configurable ClusterTimeoutMinutes for restore (was hardcoded 2 hours)
- Add comment explaining goroutine cleanup in stderr reader (cmd.Run waits)
- Add defer cancel() in cluster backup loop to prevent context leak on panic
Medium Priority Fixes:
- Standardize tick rate to 100ms for both backup and restore (consistent UX)
- Add spinnerFrame field to BackupExecutionModel for incremental updates
- Define package-level spinnerFrames constant to avoid repeated allocation
Low Priority Fixes:
- Add 30-second timeout per database in cluster cleanup loop
- Prevents indefinite hangs when dropping many databases
Optimizations:
- Pre-allocate 512 bytes in View() string builders (reduces allocations)
- Use incremental spinner frame calculation (more efficient than time-based)
- Share spinner frames array across all TUI operations
All changes are backward compatible and maintain existing behavior.