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

Major Changes:
- Add StreamingService with OpenAI Compatible format
- Upgrade Chat component V2 with Ant Design X integration
- Implement AIA module with 12 intelligent agents
- Update API routes to unified /api/v1 prefix
- Update system documentation

Backend (~1300 lines):
- common/streaming: OpenAI Compatible adapter
- modules/aia: 12 agents, conversation service, streaming integration
- Update route versions (RVW, PKB to v1)

Frontend (~3500 lines):
- modules/aia: AgentHub + ChatWorkspace (100% prototype restoration)
- shared/Chat: AIStreamChat, ThinkingBlock, useAIStream Hook
- Update API endpoints to v1

Documentation:
- AIA module status guide
- Universal capabilities catalog
- System overview updates
- All module documentation sync

Tested: Stream response verified, authentication working
Status: AIA V2.0 core completed (85%)

frontend-v2/src/modules/pkb/components/Workspace/DeepReadMode.tsx

@@ -145,13 +145,13 @@ export const DeepReadMode: React.FC<DeepReadModeProps> = ({
             timestamp: Date.now(),
           }]}
           providerConfig={{
-            apiEndpoint: '/api/v2/pkb/chat/stream',
+            apiEndpoint: '/api/v1/pkb/chat/stream',
             requestFn: async (message: string) => {
               // 🔑 关键：传递 fullTextDocumentIds 而不是 documentIds
               // fullTextDocumentIds 会触发全文加载模式，AI可以看到完整文献
               // documentIds 只是过滤RAG检索结果，AI只能看到片段
               const token = getAccessToken();
-              const response = await fetch('/api/v2/pkb/chat/stream', {
+              const response = await fetch('/api/v1/pkb/chat/stream', {
                 method: 'POST',
                 headers: { 
                   'Content-Type': 'application/json',