Review fixes (user /code-review high):
- DataTable: hoist a stable EMPTY_FILTERS fallback so a controlled caller that omits
`filters` doesn't churn a fresh {} each render.
- DataTable: the persistKey blob now stores only the slices this table OWNS — a
controlled sort/filter is written as null/{} instead of a stale never-read duplicate.
- useFilterState: optional `migrate` seed (used only when storage is empty);
ChannelsProvider carries the retired LS.channelFilter sync chip forward via migrateSyncChip.
- Channels: guard the sync-chip read with typeof instead of an `as string` cast.
Also unify the tag filter, same as the sync one: the top "YOUR TAGS" chip row is now a
controlled view over the Tags COLUMN filter (`filters.tags`), replacing its own tagFilter
state — so the chips and the Tags funnel share one state bidirectionally, the card layout
applies it via filterRows, and it persists with the rest of the map.
peter
ca9dd54923