DL-158

The agent workspace simplifies to the agent’s home channel + its session trace (two fixed panes, no arbitrary split tree); no terminal pane and no file-viewer pane in dogfood (isolated containers; an operator dev-server-view affordance is deferred to backlog, PR review lives on the user’s forge); the terminal PaneKind arm + newTerminalPane retire at the workspace flip (D6/D10)

Status: Active (Matt, 2026-08-05)