Cin review: stats-automations.js had ~600 lines of new Auto-Sync code
piled into an already-large shared file. Moved into its own module:
- New webui/static/auto-sync.js holds:
- Schedule board state (`AUTO_SYNC_BUCKETS`, `_autoSyncScheduleState`,
`_autoSyncActiveTab`, `mirroredPipelinePollers`)
- All `autoSync*` functions (trigger conversion, render panels,
drag/drop, save/unschedule, schedule modal lifecycle)
- Mirrored-playlist pipeline helpers (`runMirroredPlaylistPipeline`,
`pollMirroredPipelineStatus`, `applyMirroredPipelineState`,
`parseMirroredPipelineResponse`, `editMirroredSourceRef`,
`getMirroredSourceRef`)
- index.html loads auto-sync.js immediately after stats-automations.js
so the older `renderMirroredCard` path can keep reaching these
globals through the window namespace.
- stats-automations.js drops 567 lines and gains a one-line breadcrumb
pointing at the new file.
No behavior changes — every function moved verbatim. Globals stay in
the same window namespace, so the still-resident `renderMirroredCard`
keeps calling `runMirroredPlaylistPipeline` / `editMirroredSourceRef`
/ `mirroredPipelinePollers` exactly as before.
Both files pass `node --check`. Full Python suite still green.
