feat(analysis): 添加分析查看器页面 (#122)

- 新增 AnalysisPage 页面查看 /workflow:analyze-with-file 分析结果
- 支持 Tab 分组展示：讨论记录、结论、代码探索、视角分析
- Markdown 内容富文本渲染，JSON 数据结构化卡片展示
- 添加后端 API 路由 /api/analysis
- 添加侧边栏导航入口和中英文翻译

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

ccw/frontend/src/components/layout/Sidebar.tsx

@@ -25,6 +25,7 @@ import {
   Wrench,
   Cog,
   Users,
+  FileSearch,
 } from 'lucide-react';
 import { cn } from '@/lib/utils';
 import { Button } from '@/components/ui/Button';
@@ -77,6 +78,7 @@ const navGroupDefinitions: NavGroupDef[] = [
       { path: '/sessions', labelKey: 'navigation.main.sessions', icon: FolderKanban },
       { path: '/lite-tasks', labelKey: 'navigation.main.liteTasks', icon: Zap },
       { path: '/issues', labelKey: 'navigation.main.issues', icon: AlertCircle },
+      { path: '/analysis', labelKey: 'navigation.main.analysis', icon: FileSearch },
       { path: '/teams', labelKey: 'navigation.main.teams', icon: Users },
       { path: '/terminal-dashboard', labelKey: 'navigation.main.terminalDashboard', icon: Terminal },
     ],