Repo-tracked context so a fresh Claude Code session (this machine or a
remote/cloud one) gets accurate project context without relying on this
session's local, machine-specific memory: repo conventions (no
co-author trailers, flag copyleft deps explicitly, scope security
gates broadly -- each backed by a real past incident), testing/deploy
workflow, and pointers into the existing docs.
docs/architecture.md's sequence diagram and boot-flow text still
described the pre-widget-system single-photo-queue model (e.g. "force-
advance to next queued photo") even though that was fully replaced by
the widget system across this branch's recent history -- fixed, and
added docs/widgets.md distilling the widget system's actual design
(data model, grid placement, compositor, button-action dispatch) as
current-state documentation, including the still-open Phase 6 cleanup
(legacy Frame columns not yet dropped) as a known gap.