Why: Repeated progress and coupled scrolling obscured chat, and task choices lacked a reliable independent interaction path.
Evidence: 285 frontend unit tests and 23 browser scenarios pass locally before the shared event-loader extraction; final combination checks follow in Dev.
Impact: Coalesce cumulative progress, retain execution records, show timestamps and quiet notifications, support versioned work actions and explicit result references without automatic chat backfill.
Refs: feature/workbench-flow-completion
Why: The first S4 pass makes the project the navigation context, keeps deep views in one overlay, and leaves domain panels empty until a plugin declares them.
Evidence: npx tsc -b and npm test (61 passed) in modules/frontend.
Impact: Top bar, project sidebar, inbox all/todo filter, one-way scroll sync, drag-and-drop on the whole chat column, and local molv/system themes.
Refs: feature/s4-shell-overhaul
Co-authored-by: Cursor <cursoragent@cursor.com>
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