Windows parity: Main split view needs a live walkthrough of every destination (testing gap) #720

Current reconciliation - 2026-11-09

All-destination visitation and the old 300-pixel minimum-width failure are historical beta26 observations, not current-main findings. PR #909 enforces a 452-DIP client minimum and canvas sidebar/overflow behavior; PR #906 completes the Quick Chat source slice; PR #920 extends the global lane model. PR #965 separately qualifies bounded native workspace Create & Open.

Still open / Partial: a current installed-package walkthrough of every destination/width with real provider content and matched macOS visual acceptance. Bounded workspace/terminal receipts and existing default UIA button/command fallbacks are not whole destination fidelity or complete physical-pointer routing. Beta31 predates #965.

The original report, acceptance criteria and historical evidence below are preserved; the dated scope/progress above supersedes obsolete missing-feature claims.

Is your feature request related to a problem?
Parity row Main split view (Application shell and navigation) in investigation/ui-parity-matrix.md is Partial.

macOS: Persistent sidebar; the detail switches among welcome, global graph, project canvas, Quick Chats canvas and loop workspace.

Windows today: Every destination exists; CI live UIA drives them and the beta25 Dev Box run exercised most.

Gap: No evidence for welcome as a destination, narrow-width rendering, real provider content, or a visual comparison with macOS.

Describe the solution you'd like
A Dev Box walkthrough visiting every destination from the installed package, including welcome and a narrow window, with screenshots compared against a current macOS capture.

Describe alternatives you've considered
N/A

Additional context
This is a testing gap: Windows implements it; only live/runtime evidence is missing. Parity status and the beta25 Dev Box review are recorded in #719.