feat: 微服务架构拆分和前后端优化

后端:
- 拆分出 agent_service, runtime_service, trading_service, news_service
- Gateway 模块化拆分 (gateway_*.py)
- 添加 domains/ 领域层
- 新增 control_client, runtime_client
- 更新 start-dev.sh 支持 split 服务模式

前端:
- 完善 API 服务层 (newsApi, tradingApi)
- 更新 vite.config.js
- Explain 组件优化

测试:
- 添加多个服务 app 测试

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pyproject.toml

@@ -65,6 +65,8 @@ evotraders = "backend.cli:app"
 
 [tool.setuptools]
 packages = ["backend", "backend.agents", "backend.config",
+            "backend.apps",
+            "backend.domains",
             "backend.data", "backend.llm",
             "backend.tools", "backend.utils", "backend.services",
             "backend.explain", "backend.enrich"]