Why: Dev gitlinks lagged behind merged module mains (backend fa494c3,
frontend b067b57, documents f0361f38, plus deps advances); the integrated
build should track each repo's main.
Evidence: make pin advanced all listed submodules; make test exit 0
(frontend 33/33, ui 37/37, backend go test all ok, agent-command ok).
Impact: gitlink bumps only, no source changes.
Refs: housekeeping after chat-process-split-r1 (PR #79)
weichen