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/Controller/Hubs.hs

@@ -5,6 +5,7 @@ import Web.View.Hubs.Index
 import Web.View.Hubs.Show
 import Web.View.Hubs.New
 import Web.View.Hubs.Edit
+import Web.View.Hubs.TriageDashboard
 import Generated.Types
 import IHP.Prelude
 import IHP.ControllerPrelude
@@ -72,3 +73,40 @@ instance Controller HubsController where
         deleteRecord hub
         setSuccessMessage "Hub deleted"
         redirectTo HubsAction
+
+    action TriageDashboardAction { hubId } = autoRefresh do
+        hub     <- fetch hubId
+        widgets <- query @Widget
+            |> filterWhere (#hubId, hubId)
+            |> fetch
+        let widgetIds = map (.id) widgets
+
+        -- All candidates for this hub's widgets
+        allCandidates <- query @RequirementCandidate
+            |> filterWhereIn (#sourceWidgetId, widgetIds)
+            |> orderByAsc #createdAt
+            |> fetch
+
+        -- Triage queue: open candidates, oldest first
+        let triageQueue = filter (\c -> c.status == "open") allCandidates
+
+        -- Recent escalations: last 20
+        recentEscalations <- query @RequirementCandidate
+            |> filterWhereIn (#sourceWidgetId, widgetIds)
+            |> orderByDesc #createdAt
+            |> limit 20
+            |> fetch
+
+        -- All annotations for category breakdown
+        allAnnotations <- query @Annotation
+            |> filterWhereIn (#widgetId, widgetIds)
+            |> fetch
+
+        render TriageDashboardView
+            { hub
+            , widgets
+            , allCandidates
+            , triageQueue
+            , recentEscalations
+            , allAnnotations
+            }