feat(task-023): bind workflow templates into demo flow

apps/frontend/tests/article_detail.model.test.mjs

@@ -30,6 +30,32 @@ const detail = {
     updated_at: "2026-05-21T00:00:00Z",
   },
   target_site: { name: "Demo Site" },
+  workflow_template_snapshot: {
+    id: "workflow-1",
+    name: "Demo workflow",
+    slug: "demo-workflow",
+    version: 2,
+    stage_summary: [
+      {
+        id: "stage-2",
+        stable_key: "draft",
+        display_name: "Draft assembly",
+        position: 2,
+        owner_role: "EDITOR",
+        runner_profile_key: "draft-agent",
+        requires_human_approval: false,
+      },
+      {
+        id: "stage-1",
+        stable_key: "intake",
+        display_name: "Intake",
+        position: 1,
+        owner_role: "EDITOR",
+        runner_profile_key: "intake-agent",
+        requires_human_approval: true,
+      },
+    ],
+  },
   timeline: [
     {
       id: "2",
@@ -131,5 +157,11 @@ const summary = buildDetailSummary(detail, {
 assert.equal(summary.viewerRole, "EDITOR");
 assert.equal(summary.viewerEmail, "editor@example.com");
 assert.equal(summary.targetSite, "Demo Site");
+assert.equal(summary.workflowTemplate.name, "Demo workflow");
+assert.equal(summary.workflowTemplate.version, 2);
+assert.deepEqual(
+  summary.workflowTemplate.stages.map((stage) => stage.stableKey),
+  ["intake", "draft"],
+);
 assert.equal(summary.timeline.length, 2);
 assert.equal(summary.jobDetails.length, 1);