## Summary
Fixes the "Low disk space on 'Ghostty'" false positive: the low-storage rule evaluated every mounted volume including read-only DMG images.
### Changes
- `StorageVolumeContext` gains `isReadOnly` and `totalBytes`; context builder populates both from `StorageVolumeItem`.
- `AlertEngine` low-storage rule now skips `isReadOnly` volumes and volumes under 1 GB total (thresholds meaningless at that size).
- Regression tests: read-only below-threshold → no alert; sub-1 GB volume → no alert; normal writable low volume → alert.
### Verified
- 95 tests, 0 failures. `swiftlint` — 0 violations.
Fixes #33.
Read-only mounts (DMG images like /Volumes/Ghostty, update snapshots) with
~0% free produced false-positive low-storage alerts. StorageVolumeContext
now carries isReadOnly and totalBytes; the rule skips read-only volumes and
volumes under 1 GB where thresholds are meaningless. Regression tests cover
both exclusions plus the normal trigger path.
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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
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Summary
Fixes the "Low disk space on 'Ghostty'" false positive: the low-storage rule evaluated every mounted volume including read-only DMG images.
Changes
StorageVolumeContextgainsisReadOnlyandtotalBytes; context builder populates both fromStorageVolumeItem.AlertEnginelow-storage rule now skipsisReadOnlyvolumes and volumes under 1 GB total (thresholds meaningless at that size).Verified
swiftlint— 0 violations.Fixes #33.