refactor(frontend): Replace console.log with logger utility - Sprint 3 Story 1

Replace all console.log/warn/error statements with unified logger utility.

Changes:
- Replaced console in lib/hooks/use-stories.ts
- Replaced console in lib/signalr/SignalRContext.tsx
- Replaced console in lib/hooks/useProjectHub.ts
- Replaced console in lib/hooks/use-tasks.ts
- Replaced console in lib/hooks/useNotificationHub.ts
- Replaced console in lib/hooks/use-projects.ts
- Replaced console in app/(dashboard)/projects/[id]/kanban/page.tsx

Logger respects NODE_ENV (debug disabled in production).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

lib/hooks/use-projects.ts

@@ -1,18 +1,19 @@
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { projectsApi } from '@/lib/api/projects';
 import type { Project, CreateProjectDto, UpdateProjectDto } from '@/types/project';
+import { logger } from '@/lib/utils/logger';
 
 export function useProjects(page = 1, pageSize = 20) {
   return useQuery<Project[]>({
     queryKey: ['projects', page, pageSize],
     queryFn: async () => {
-      console.log('[useProjects] Fetching projects...', { page, pageSize });
+      logger.debug('[useProjects] Fetching projects...', { page, pageSize });
       try {
         const result = await projectsApi.getAll(page, pageSize);
-        console.log('[useProjects] Fetch successful:', result);
+        logger.debug('[useProjects] Fetch successful:', result);
         return result;
       } catch (error) {
-        console.error('[useProjects] Fetch failed:', error);
+        logger.error('[useProjects] Fetch failed:', error);
         throw error;
       }
     },