Render a truthful active-session Tideline rail

[Hmbown]

Problem

At 100+ columns an active Codewhale session needs the compact five-group Tideline rail from the approved product direction, without pretending queued work is running, hiding live shells, or exposing inert controls.

Scope

• Render RUNS, WHALES, POD, WORK, and CONTEXT beside an active session at 16 columns from 100–119 and 22 columns from 120+.
• Project queued versus running work as typed state at the boundary; include live shell jobs in the active-session projection.
• Keep historic workflow output from presenting as current activity.
• Localize user-visible labels and counted statuses across all shipped complete locales.
• Keep this summary rail passive until its destinations have real keyboard and pointer behavior.

Acceptance

• RUNS and WORK never contradict each other for a foreground turn.
• A live shell cannot yield an idle rail.
• An empty legacy side work surface does not suppress the compact Tideline rail.
• No fake help/collapse controls or hitboxes appear in the passive summary.
• Terminal-frame and exact-head CI evidence remain separate from source tests.

Delivery receipt

Implemented in feat/tideline-live-rail-20260830 commit d073ae16dd; PR to follow.