docs: complete scene 9 staged message box

docs/runbooks/presentation-visual-review.md

@@ -54,3 +54,28 @@ pnpm --filter @lda/console build
 20. Compact chat is hidden while the inspector is open
 
 Screenshots require human approval and are not pixel-diff tests.
+
+## Scene 9 Staged Message Review
+
+Review these five deep links at `1280x720` and `1024x768`, at 100% zoom:
+
+- `/present#scene/prepared-lifecycle/discover`
+- `/present#scene/prepared-lifecycle/draft`
+- `/present#scene/prepared-lifecycle/validate`
+- `/present#scene/prepared-lifecycle/artifact`
+- `/present#scene/prepared-lifecycle/deployment`
+
+Confirm that one labelled textarea remains visible in every phase, is empty in
+Discover and Validate, and contains the exact prepared prompt in Draft,
+Artifact, and Deployment. Confirm the right phase projection remains dominant,
+the panes do not overlap, and `document.documentElement.scrollHeight` equals
+`clientHeight`. Reload direct hashes before capture: in dev mode, immediate
+screenshots during an in-place hash transition can catch the presentation
+animation between surfaces even though the settled/reloaded route is correct.
+
+Edit and Send in Draft, then verify Validate contains that exact edited user
+turn. Repeat from Artifact to Deployment. On Deployment, Send must show only
+`Run request prepared for the next execution slice.`; compare `/api/rpc`
+request counts before and after to confirm no execution call was made. Scenes
+10–12 own the subsequent run activation and live execution path; do not use
+Scene 9 to claim a run has started.