feat(FN-3748): add workspace aliases for @fusion/* packages to desktop vite

Fixes a duplicate import in the roadmap plugin and adds `@fusion/*` workspace aliases to the desktop vitest configuration so tests can resolve internal packages correctly.

Fusion-Task-Id: FN-3748

plugins/fusion-plugin-roadmap/src/routes/roadmap-routes.ts

@@ -14,7 +14,6 @@ import {
   validateFeatureSuggestionInput,
   validateSuggestionInput,
   ValidationError as SuggestionValidationError,
-  SUGGESTION_TIMEOUT_MS,
 } from "./roadmap-suggestions.js";
 
 const roadmapStoreCache = new WeakMap<object, RoadmapStore>();