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%)

backend/src/index.ts

@@ -14,6 +14,7 @@ import { rvwRoutes } from './modules/rvw/index.js';
 import { aslRoutes } from './modules/asl/routes/index.js';
 import { registerDCRoutes, initDCModule } from './modules/dc/index.js';
 import pkbRoutes from './modules/pkb/routes/index.js';
+import { aiaRoutes } from './modules/aia/index.js';
 import { registerHealthRoutes } from './common/health/index.js';
 import { logger } from './common/logging/index.js';
 import { authRoutes, registerAuthPlugin } from './common/auth/index.js';
@@ -138,18 +139,22 @@ await fastify.register(batchRoutes, { prefix: '/api/v1' });
 await fastify.register(reviewRoutes, { prefix: '/api/v1' });
 
 // ============================================
-// 【业务模块】RVW - 稿件审查系统（新架构 v2）
+// 【业务模块】RVW - 稿件审查系统
 // ============================================
-await fastify.register(rvwRoutes, { prefix: '/api/v2/rvw' });
-logger.info('✅ RVW稿件审查路由已注册（v2新架构）: /api/v2/rvw');
-logger.info('   ⚠️  旧版路由仍可用: /api/v1/review');
+await fastify.register(rvwRoutes, { prefix: '/api/v1/rvw' });
+logger.info('✅ RVW稿件审查路由已注册: /api/v1/rvw');
 
 // ============================================
-// 【业务模块】PKB - 个人知识库（新架构 v2）
+// 【业务模块】PKB - 个人知识库
 // ============================================
-await fastify.register(pkbRoutes, { prefix: '/api/v2/pkb' });
-logger.info('✅ PKB个人知识库路由已注册（v2新架构）: /api/v2/pkb');
-logger.info('   ⚠️  旧版路由仍可用: /api/v1/knowledge, /api/v1/batch-tasks');
+await fastify.register(pkbRoutes, { prefix: '/api/v1/pkb' });
+logger.info('✅ PKB个人知识库路由已注册: /api/v1/pkb');
+
+// ============================================
+// 【业务模块】AIA - AI智能问答
+// ============================================
+await fastify.register(aiaRoutes, { prefix: '/api/v1/aia' });
+logger.info('✅ AIA智能问答路由已注册: /api/v1/aia');
 
 // ============================================
 // 【业务模块】ASL - AI智能文献筛选