After an interrupted attach wizard, the raw mount stays behind,
causing the device to appear as "mounted" in scan results. Now the
scan button calls cancel first, which unmounts any stale raw mounts
that have no bind mount in fstab.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
rename() fails with EBUSY on Docker bind-mounted files. Add safeWriteFile()
helper that tries atomic rename first, falls back to direct write. Fixes
both init wizard and attach wizard fstab operations.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
New Settings wizard to attach drives with existing filesystems without
formatting. Mounts partition at staging path, lets user browse and pick
a subfolder, then bind-mounts it at /mnt/<name> with fstab entries.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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