Four-cut cluster pulling the orchestrators out of DeviceSync.tsx.
1179 → 905 LOC (−274).
useDeviceSyncDrives — drives state + drivesLoading + refreshDrives
callback + the 5 s polling useEffect + the activeDrive memo that
matches targetDir against any detected drive's mount_point.
Returns { drives, drivesLoading, activeDrive, driveDetected,
refreshDrives }.
useDeviceSyncSourceStatuses — owns sourcePathsMap state + the
useEffect that computes per-source paths through compute_sync_paths
(parallel for all sources, with the cancellation guard), and the
derived sourceStatuses Map keyed on 'synced' / 'pending' /
'deletion'.
runDeviceSyncMigration — runDeviceSyncMigrationPreview (read v1
manifest's filenameTemplate, fetch album-source tracks, compute
new paths via Rust + old paths via JS legacy template, diff into
pairs + collisions + unchanged) and runDeviceSyncMigrationExecute
(invoke rename_device_files, bump manifest to v2, rescan device).
Exports MigrationPhase / MigrationPair / MigrationResult types so
the page state stays typed.
runDeviceSyncExecution — runDeviceSyncSummaryPrompt (input
validation + invoke calculate_sync_payload through the subsonic
client) and runDeviceSyncExecute (delete pending sources, re-write
playlist m3u8 even when nothing to download, fire sync_batch_to_device
with the right toast variants on space / mount / generic errors).
SyncDelta type moves with it.
DeviceSync drops the inline definitions; closeMigration stays
inline (six lines, no real win extracting it). Pure code move
otherwise — no behaviour change.
Frank Stellmacher