weichen
7da2b192d2
Why: T2-T4 changed the interaction foundation (pure-inbox rail, four-entrance command bus, overlay workspaces) and the guide still described the classic tabs; T5 acceptance also requires the verification record with the zero-page walkthrough. Evidence: zero-page walkthrough 12/12 PASS on a fresh real binary (fresh data dir: empty instance -> project/conversation -> slash commands -> #upload card lifecycle -> card action receipts -> tidy -> HITL block+resolve -> button-entrance dispatch -> plugin workspace declaration -> artifacts -> four-entrance audit); StatusLamp shape+color dual encoding asserted by ui suite; combo make test at pinned heads. Impact: usage guide sections 4.2-4.7/5/6.2/7 rewritten; new T5 record; no code change. Refs: docs/proposals/2026-09-30-ui-inbox-command-workspace.md T5; task card feature/polish-r1