How I made file moves between drives undoable and verified in a Rust desktop app

1. the problem: my movie library on several drives, moves that half-finish, no undo
2. the rule I set: never delete a file unless the user explicitly asks
3. journal first: write every planned step to SQLite before touching the disk
4. the copy: pipelined reader/writer, flush, read back past the OS cache, compare SHA-256
5. the switch: staging folder → one rename → library points at the new place
6. originals to the recycle bin / freedesktop trash (rename-only, never copied)
7. undo from history, and what happens after a crash mid-move
8. try it / contribute: https://github.com/mustafayevt/CineVault