R12 S4c. Channels.tsx shed its ~150-line column block and 3 cell components
into the co-located channelColumns.tsx:
- SyncBadge / SyncCell / ActionsCell move verbatim (prop-driven, self-contained).
- the column array becomes a buildChannelColumns(deps) factory next to
subsColumn — the manager owns the state/mutations and passes them in; the
inline patch.mutate wrappers become onHide/onDeep callbacks so the factory
doesn't couple to the mutation type.
Channels.tsx 905 -> 628 lines; no behaviour change. Gate green (tsc / eslint 0
errors / prettier / knip / vitest 79) + self-E2E: the manager renders every
column and cell (priority stepper, actions, sync badges, tags) with no console
errors.
peter
69d34f7fa3