feat(aia): Complete AIA V2.0 with universal streaming capabilities

Major Updates:
- Add StreamingService with OpenAI Compatible format (backend/common/streaming)
- Upgrade Chat component V2 with Ant Design X integration
- Implement AIA module with 12 intelligent agents
- Create AgentHub with 100% prototype V11 restoration
- Create ChatWorkspace with streaming response support
- Add ThinkingBlock for deep thinking display
- Add useAIStream Hook for OpenAI Compatible stream handling

Backend Common Capabilities (~400 lines):
- OpenAIStreamAdapter: SSE adapter with OpenAI format
- StreamingService: unified streaming service
- Support content and reasoning_content dual streams
- Deep thinking tag processing (<think>...</think>)

Frontend Common Capabilities (~2000 lines):
- AIStreamChat: modern streaming chat component
- ThinkingBlock: collapsible deep thinking display
- ConversationList: conversation management with grouping
- useAIStream: OpenAI Compatible stream handler Hook
- useConversations: conversation state management Hook
- Modern design styles (Ultramodern theme)

AIA Module Frontend (~1500 lines):
- AgentHub: 12 agent cards with timeline design
- ChatWorkspace: fullscreen immersive chat interface
- AgentCard: theme-colored cards (blue/yellow/teal/purple)
- 5 phases, 12 agents configuration
- Responsive layout (desktop + mobile)

AIA Module Backend (~900 lines):
- agentService: 12 agents config with system prompts
- conversationService: refactored with StreamingService
- attachmentService: file upload skeleton (30k token limit)
- 12 API endpoints with authentication
- Full CRUD for conversations and messages

Documentation:
- AIA module status and development guide
- Universal capabilities catalog (11 services)
- Quick reference card for developers
- System overview updates

Testing:
- Stream response verified (HTTP 200)
- Authentication working correctly
- Auto conversation creation working
- Deep thinking display working
- Message input and send working

Status: Core features completed (85%), attachment and history loading pending

frontend-v2/src/modules/aia/components/AgentCard.tsx

@@ -0,0 +1,78 @@
+/**
+ * AgentCard - 智能体卡片组件
+ * 
+ * 100%还原原型图V11的卡片设计：
+ * - 背景色: #F6F9FF (蓝色系) / #F0FDFA (青色系-工具)
+ * - 边框: #E0E7FF / #CCFBF1
+ * - 圆角: 10px
+ * - 内边距: 14px
+ * - 最小高度: 145px
+ * - 序号水印
+ * - 悬停效果
+ */
+
+import React from 'react';
+import * as LucideIcons from 'lucide-react';
+import type { AgentConfig } from '../types';
+import '../styles/agent-card.css';
+
+interface AgentCardProps {
+  agent: AgentConfig;
+  onClick: (agent: AgentConfig) => void;
+}
+
+/**
+ * 动态获取 Lucide 图标
+ */
+const getIcon = (iconName: string): React.ComponentType<any> => {
+  // 转换为 PascalCase
+  const pascalCase = iconName
+    .split('-')
+    .map(word => word.charAt(0).toUpperCase() + word.slice(1))
+    .join('');
+  
+  return (LucideIcons as any)[pascalCase] || LucideIcons.HelpCircle;
+};
+
+export const AgentCard: React.FC<AgentCardProps> = ({ agent, onClick }) => {
+  const Icon = getIcon(agent.icon);
+  const orderStr = String(agent.order).padStart(2, '0');
+
+  const handleClick = () => {
+    if (agent.isTool && agent.toolUrl) {
+      // 工具类：跳转外部链接
+      window.location.href = agent.toolUrl;
+    } else {
+      onClick(agent);
+    }
+  };
+
+  return (
+    <div
+      className={`agent-card theme-${agent.theme} ${agent.isTool ? 'tool-card' : ''}`}
+      onClick={handleClick}
+    >
+      {/* 工具类：右上角跳转图标 */}
+      {agent.isTool && (
+        <LucideIcons.ExternalLink className="link-icon" />
+      )}
+
+      {/* 头部：图标 + 标题 + 序号 */}
+      <div className="card-header">
+        <div className="card-header-left">
+          <div className="icon-box">
+            <Icon className="agent-icon" />
+          </div>
+          <h3 className="card-title">{agent.name}</h3>
+        </div>
+        <span className="num-watermark">{orderStr}</span>
+      </div>
+
+      {/* 描述文本 */}
+      <p className="desc-text">{agent.description}</p>
+    </div>
+  );
+};
+
+export default AgentCard;
+