asyncio's SubprocessTransport sends SIGKILL to child processes during
event loop cleanup, killing the gniza bash wrapper when the TUI exits.
Switch to subprocess.Popen which has no such cleanup behavior, allowing
backup jobs to continue running after the TUI is closed.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The subprocess stdout was a pipe to the TUI. When the TUI exited, the
pipe broke (SIGPIPE) and killed the backup process. Now the subprocess
writes to a log file in WORK_DIR, and the TUI tails it for live
display. When the TUI exits, the subprocess keeps running because it
writes to a file, not a pipe. On restart, the log file is loaded to
show output for reconnected or finished background jobs.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Start CLI subprocesses in their own session so SIGTERM via
os.killpg reaches child processes (rsync, etc.) not just the shell.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Backup and restore operations now run as background jobs instead of
blocking modal screens. Users can navigate away and check progress
from a dedicated Running Tasks screen. OperationLog supports attaching
to running jobs with live output polling.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
