feat: add terminal panel components and Zustand store for state management

- Created a barrel export file for terminal panel components.
- Implemented Zustand store for managing terminal panel UI state, including visibility, active terminal, view mode, and terminal ordering.
- Added actions for opening/closing the terminal panel, setting the active terminal, changing view modes, and managing terminal order.
- Introduced selectors for accessing terminal panel state properties.

ccw/frontend/src/components/shared/TickerMarquee.tsx

@@ -3,14 +3,12 @@
 // ========================================
 // Real-time scrolling ticker with CSS marquee animation and WebSocket messages
 
-import * as React from 'react';
 import { useIntl } from 'react-intl';
 import { cn } from '@/lib/utils';
 import { useRealtimeUpdates, type TickerMessage } from '@/hooks/useRealtimeUpdates';
 import {
   Play,
   CheckCircle2,
-  XCircle,
   Workflow,
   Activity,
   WifiOff,