redbear-power: add nice editor (N), open files (l), remove dead event.rs, bench auto-stop toast
- nice_edit.rs: modal dialog for adjusting process nice (-20..19), slider visualization
- open_files.rs: reads /proc/[pid]/fd, classifies file descriptors by type
- Removed dead event.rs module (never wired, unused Event enum)
- Benchmark auto-completion: detects elapsed >= duration, calls stop(), flashes toast
- PROCHOT toast trigger wired in app.rs
- Help text updated with N and l keybindings
- 217 tests pass, 0 warnings, 4.1 MB LTO release binary
vasilito
d5c8498ac3