Address follow-up review suggestions for XState roadmap integration

- Move deleteFeature actor cleanup outside set() for consistency
- Skip no-op store writes when XState silently ignores events
- Use 'as const' on assign action string literals for type narrowing

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

apps/frontend/src/renderer/stores/roadmap-store.ts

@@ -265,6 +265,9 @@ export const useRoadmapStore = create<RoadmapState>((set) => ({
     const derivedStatus = mapFeatureStateToStatus(String(snapshot.value));
     const ctx = snapshot.context;
 
+    // Skip store write if XState silently ignored the event (no-op transition)
+    if (derivedStatus === feature.status && ctx.taskOutcome === feature.taskOutcome && ctx.previousStatus === feature.previousStatus) return;
+
     set((s) => {
       if (!s.roadmap) return s;
       const updatedFeatures = s.roadmap.features.map((f) =>
@@ -363,17 +366,17 @@ export const useRoadmapStore = create<RoadmapState>((set) => ({
     });
   },
 
-  deleteFeature: (featureId) =>
+  deleteFeature: (featureId) => {
+    // Stop and remove the feature's actor outside set()
+    const actor = featureActors.get(featureId);
+    if (actor) {
+      actor.stop();
+      featureActors.delete(featureId);
+    }
+
     set((state) => {
       if (!state.roadmap) return state;
 
-      // Stop and remove the feature's actor
-      const actor = featureActors.get(featureId);
-      if (actor) {
-        actor.stop();
-        featureActors.delete(featureId);
-      }
-
       const updatedFeatures = state.roadmap.features.filter(
         (feature) => feature.id !== featureId
       );
@@ -385,7 +388,8 @@ export const useRoadmapStore = create<RoadmapState>((set) => ({
           updatedAt: new Date()
         }
       };
-    }),
+    });
+  },
 
   clearRoadmap: () => {
     // Stop all actors and clear Maps

apps/frontend/src/shared/state-machines/roadmap-feature-machine.ts

@@ -174,12 +174,12 @@ export const roadmapFeatureMachine = createMachine(
         linkedSpecId: ({ event }) =>
           event.type === 'LINK_SPEC' ? event.specId : undefined
       }),
-      savePreviousUnderReview: assign({ previousStatus: () => 'under_review' }),
-      savePreviousPlanned: assign({ previousStatus: () => 'planned' }),
-      savePreviousInProgress: assign({ previousStatus: () => 'in_progress' }),
-      setTaskOutcomeCompleted: assign({ taskOutcome: () => 'completed' }),
-      setTaskOutcomeDeleted: assign({ taskOutcome: () => 'deleted' }),
-      setTaskOutcomeArchived: assign({ taskOutcome: () => 'archived' }),
+      savePreviousUnderReview: assign({ previousStatus: () => 'under_review' as const }),
+      savePreviousPlanned: assign({ previousStatus: () => 'planned' as const }),
+      savePreviousInProgress: assign({ previousStatus: () => 'in_progress' as const }),
+      setTaskOutcomeCompleted: assign({ taskOutcome: () => 'completed' as const }),
+      setTaskOutcomeDeleted: assign({ taskOutcome: () => 'deleted' as const }),
+      setTaskOutcomeArchived: assign({ taskOutcome: () => 'archived' as const }),
       clearDoneContext: assign({
         taskOutcome: () => undefined,
         previousStatus: () => undefined