- Introduced `test_swap_edge_cases.cc` with extensive tests for minimum payload sizes, truncated payloads, data overflows, unsupported encoding versions, CRC mismatches, and mixed valid/invalid records to ensure reliability under complex scenarios.
- Enhanced `main.cc` with a top-level exception handler to prevent data loss and ensure cleanup during unexpected failures.
- Added detailed journaling system (`SwapManager`) for crash recovery, including edit recording and replay.
- Integrated recovery prompts for handling swap files during file open flows.
- Implemented swap file cleanup, checkpointing, and compaction mechanisms.
- Added extensive unit tests for swap-related behaviors such as recovery prompts, file pruning, and corruption handling.
- Updated CMake to include new test files.
- Introduced SwapManager for sidecar journaling of buffer mutations, with a safe recovery mechanism.
- Added group undo/redo functionality, allowing atomic grouping of related edits.
- Implemented `SwapRecorder` and integrated it as a callback interface for mutations.
- Added unit tests for swap journaling (save/load/replay) and undo grouping.
- Refactored undo to support group tracking and ID management.
- Updated CMake to include the new tests and swap journaling logic.
