fix(webapp): pin the dismissed prompt in the gallery and drop the dead expand field

Author: kathiekiwi

apps/webapp/app/routes/storybook.agent-ui/manifest.ts

@@ -66,8 +66,6 @@ export type GallerySection = {
   sectionId: string;
   title: string;
   group: GalleryGroup;
-  /** A state that only exists after a click. */
-  expandText?: string;
 };
 
 export const GALLERY_GROUPS: { group: GalleryGroup; page: GalleryPageId; label: string }[] = [
@@ -226,13 +224,11 @@ export const MANIFEST: GallerySection[] = [
     sectionId: "investigation-card-concluded-code-grounded",
     title: "Concluded, code-grounded — source citation and Show code",
     group: "investigation",
-    expandText: "How I worked this out",
   },
   {
     sectionId: "investigation-card-concluded-not-code-grounded",
     title: "Concluded, not code-grounded — no source citation, no Show code",
     group: "investigation",
-    expandText: "How I worked this out",
   },
   {
     sectionId: "investigation-card-inconclusive",

apps/webapp/app/routes/storybook.agent-ui/route.tsx

@@ -10,7 +10,6 @@ import { DashboardAgentMessages } from "~/components/dashboard-agent/DashboardAg
 import { DashboardAgentSuggestedPrompts } from "~/components/dashboard-agent/DashboardAgentSuggestedPrompts";
 import { AgentPanelColumn } from "~/components/dashboard-agent/panel-layout";
 import { liveProgress } from "~/components/dashboard-agent/progress-line";
-import { resolveSuggestedPrompts } from "~/components/dashboard-agent/suggested-prompts";
 import type { WakeWatch } from "~/components/dashboard-agent/WakeBanner";
 import { WatchChips, type WatchChip } from "~/components/dashboard-agent/WatchChips";
 import { cn } from "~/utils/cn";
@@ -175,9 +174,9 @@ const promotedPrompt: SuggestedPrompt = {
   source: "promoted",
 };
 
-const dismissedPromptIds = resolveSuggestedPrompts(demoPageContexts.failedRun)
-  .slice(0, 1)
-  .map((prompt) => prompt.id);
+// Pinned, not resolved: the fixture's signal has a fixed timestamp, so a live resolve would
+// dismiss a different chip once that timestamp aged out of the freshness window.
+const dismissedPromptIds = demoFixtures.demoDismissedPromptIds;
 
 function toWatchChip(watch: (typeof demoWatches.row)[number]): WatchChip {
   return {