feat(P2+P3): IHF Phase 2 complete; register Phase 3 workplan

Phase 2 — Structured Feedback and Triage (IHUB-WP-0002):
- Schema: annotation_threads, requirement_candidates, triage_states,
  reviewer_assignments; annotations extended with severity + thread_id
- AnnotationThreadsController: create threads, assign annotations
- RequirementCandidatesController: CRUD, escalation, triage lifecycle,
  reviewer assignment, my-queue
- Annotation severity (low/medium/high/critical) with Tailwind color cues
- TriageDashboardAction on HubsController with autoRefresh
- Integration tests (T01–T09), SCOPE.md updated, docs/phase2-summary.md

Phase 3 — Governance and Decision Linkage (IHUB-WP-0003):
- Workplan registered: 9 tasks, State Hub workstream 5f201ee3

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Web/View/Annotations/Index.hs

@@ -43,6 +43,9 @@ renderAnnotation childrenOf a = [hsx|
             <span class="text-xs bg-gray-100 text-gray-600 px-2 py-0.5 rounded font-medium">
                 {a.category}
             </span>
+            <span class={severityClass a.severity}>
+                {a.severity}
+            </span>
             <span class="text-xs text-gray-400">{a.actorType}</span>
             {if isJust a.retractedAt
                 then [hsx|<span class="text-xs text-red-400 italic">retracted</span>|]
@@ -53,9 +56,18 @@ renderAnnotation childrenOf a = [hsx|
         <div class="mt-2 flex gap-2">
             <a href={NewAnnotationAction { widgetId = a.widgetId }}
                class="text-xs text-indigo-500 hover:text-indigo-700">Reply</a>
+            <a href={ShowAnnotationAction { annotationId = a.id }}
+               class="text-xs text-gray-400 hover:text-gray-600">Details / Escalate</a>
         </div>
         <div class="ml-6 mt-3 space-y-3">
             {forEach (childrenOf a) (renderAnnotation childrenOf)}
         </div>
     </div>
 |]
+
+severityClass :: Text -> Text
+severityClass "low"      = "text-xs px-2 py-0.5 rounded bg-gray-100 text-gray-500"
+severityClass "medium"   = "text-xs px-2 py-0.5 rounded bg-blue-100 text-blue-700"
+severityClass "high"     = "text-xs px-2 py-0.5 rounded bg-yellow-100 text-yellow-800"
+severityClass "critical" = "text-xs px-2 py-0.5 rounded bg-red-100 text-red-800 font-semibold"
+severityClass _          = "text-xs px-2 py-0.5 rounded bg-gray-100 text-gray-500"