FE-709: Continuous workspace shell

[kostandinang]

Summary

Replaces the per-phase interview center pane with a continuous workspace shell while preserving phase routes, existing interview-controller behavior, and the durable workflow model. The interview still behaves as one four-phase conversation, but the UI now has a stable single-pane host for future chat runtime and reconciliation work.

Changes

• Render realized workflow phases in one cumulative ContinuousWorkspaceView scroll surface.
• Keep only the current reachable phase interactive while showing closed and future-ready context in place.
• Add useContinuousWorkspaceController to own the single chat runtime, lifecycle handling, auto phase intents, and per-phase section projection.
• Share controller helpers through -interview-controller-core.ts so the continuous workspace and legacy interview controller use the same projection logic.
• Add workspace focus state and sidebar scroll-spy highlighting for phase sections, with route-active fallback for graph/export surfaces.
• Stabilize continuous workspace section projection during live updates to avoid unnecessary observer churn.
• Restore submitted-phase live tool running indicators so pre-stream tool activity remains visible.
• Update controller and view tests for the continuous workspace, scroll focus, live tool details, and submitted pre-stream behavior.

Testing

• npm run verify

[kostandinang]

• FE-709: Continuous workspace shell #134 : 2 dependent PRs (#138 , #139 ) 👈 (View in Graphite)
• FE-705: Planning extensions and persistence facade cleanup #133 : 1 other dependent PR (#136 )
• FE-705: Agent CLI capabilities and workflow documentation #132
• main

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[cursor]

PR Summary

Medium Risk
Moderate risk UI/runtime refactor that changes the core interview rendering path and introduces new controller/view state shared logic; potential for regressions in phase navigation, streaming chat behavior, and lifecycle edge-cases.

Overview
Implements a new ContinuousWorkspaceView that renders all realized workflow phases in a single scrollable workspace while keeping the existing phase routes, and switches the phase routes (grounding, elicitation, requirements-review, acceptance-review) to use it.

Adds useContinuousWorkspaceController to run a spec-scoped chat/runtime lifecycle and project per-phase sections, and refactors shared interview-view helpers into -interview-controller-core.ts (including bottom-artifact enrichment and live tool/activity extraction) so both controllers share behavior.

Introduces WorkspaceFocusProvider + IntersectionObserver-based scroll-spy to highlight the currently visible phase in the sidebar (with route-active fallback for peer routes like graph/export), and updates/extends tests to cover the new workspace shell and to preserve live tool “running” indicators during the submitted pre-stream window.

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[augmentcode]

🤖 Augment PR Summary

Summary: This PR implements a “continuous workspace” interview shell so the center pane behaves like one cumulative conversation across phases instead of separate per-phase views.

Changes:

• Replaces per-phase InterviewView routes with ContinuousWorkspaceView (single scroll surface that stacks realized phase sections).
• Adds useContinuousWorkspaceController to own the spec-scoped useChat runtime, lifecycle wiring, auto phase-intent submission, and section projection.
• Introduces WorkspaceFocusProvider + IntersectionObserver scroll-spy to track focusedPhase and drive sidebar highlighting.
• Extracts shared pure helpers + bottom-artifact enrichment into -interview-controller-core.ts so both controllers reuse the same logic.
• Updates router tests to reflect the new workspace view mount/render semantics.
• Updates planning docs (memory/PLAN.md, docs/archive/PLAN_HISTORY.md) to reflect the runtime umbrella and FE-709 completion.

Technical Notes: Keeps InterviewView/useInterviewController intact for the existing large test suite while switching the live phase routes to the new continuous workspace host.

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[cursor]

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