Buffered Copy Handler

Buffered Copy Handler is an independent Linux file copy and move manager
with tunable I/O buffers, byte-offset pause/resume checkpoints, and wildcard
or attribute filtering, inspired by classic Copy Handler workflows.

Key Features:
- Tunable I/O Buffer Engine: choose chunk sizes of 64 KB, 256 KB, 1 MB,
4 MB, or 16 MB with real-time throughput telemetry (MB/s), chunk progress,
and sparkline visualization.
- Checkpointed Pause and Resume: pause active transfers cleanly at exact
byte offsets and persist resumable JSON checkpoints so interrupted multi-megabyte
or gigabyte file transfers continue from the saved byte offset across pauses
or restarts.
- Filter Engine and Safe Verification: filter queues with include/exclude
wildcard masks, minimum/maximum file size, and modified date cutoffs;
preserve file timestamps/permissions and verify post-copy SHA-256 digests
before removing sources in Move mode.
- Task Inspector and Profiles: inspect per-file statuses, speeds, and ETA;
save and load JSON buffer/filter profiles and export completed task
histories to CSV.
- Bilingual English and Vietnamese interface with instant runtime switching.

Disclaimer: This project is an independent open-source tool and is not
affiliated with, sponsored by, or endorsed by Copy Handler authors.