feat(dc): Complete Phase 1 - Portal workbench page development

Summary:
- Implement DC module Portal page with 3 tool cards
- Create ToolCard component with decorative background and hover animations
- Implement TaskList component with table layout and progress bars
- Implement AssetLibrary component with tab switching and file cards
- Complete database verification (4 tables confirmed)
- Complete backend API verification (6 endpoints ready)
- Optimize UI to match prototype design (V2.html)

Frontend Components (~715 lines):
- components/ToolCard.tsx - Tool cards with animations
- components/TaskList.tsx - Recent tasks table view
- components/AssetLibrary.tsx - Data asset library with tabs
- hooks/useRecentTasks.ts - Task state management
- hooks/useAssets.ts - Asset state management
- pages/Portal.tsx - Main portal page
- types/portal.ts - TypeScript type definitions

Backend Verification:
- Backend API: 1495 lines code verified
- Database: dc_schema with 4 tables verified
- API endpoints: 6 endpoints tested (templates API works)

Documentation:
- Database verification report
- Backend API test report
- Phase 1 completion summary
- UI optimization report
- Development task checklist
- Development plan for Tool B

Status: Phase 1 completed (100%), ready for browser testing
Next: Phase 2 - Tool B Step 1 and 2 development

docs/00-项目概述/系统总体架构设计.md

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-# 系统总体架构设计
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-> **文档版本：** v1.0  
-> **创建日期：** 2025-10-29  
-> **维护者：** 架构团队  
-> **最后更新：** 2025-10-29
-
----
-
-## 📋 文档说明
-
-本文档描述AI科研平台的系统总体架构设计，包括：
-- 整体系统架构
-- 用户端架构
-- 运营管理端架构
-- 部署架构
-- 模块化设计
-- 安全性设计
-
----
-
-## ⏳ 待完善
-
-本文档内容待规划完善，目前仅作为占位文档。
-
----
-
-**文档版本：** v1.0  
-**最后更新：** 2025-10-29
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