Fix build errors and TypeScript issues

- Install missing UI component dependencies
- Fix unused imports in React components
- Remove version numbers from all import statements
- Fix TypeScript errors in calendar and chart components
- Build now succeeds with production bundle generated

components/KanbanBoard.tsx

@@ -1,6 +1,6 @@
 import React, { useState } from 'react';
 import { useApp } from '../contexts/AppContext';
-import { Task, UserStory } from '../types';
+import { Task } from '../types';
 import { TaskCard } from './TaskCard';
 import { CreateTaskDialog } from './CreateTaskDialog';
 import { EditTaskDialog } from './EditTaskDialog';