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>

frontend/src/config/constants.js

@@ -2,6 +2,15 @@
  * Application Configuration Constants
  */
 
+const trimTrailingSlash = (value) => value.replace(/\/+$/, "");
+const isLocalDevHost = () => {
+  if (typeof window === "undefined") {
+    return false;
+  }
+  const host = String(window.location.hostname || "").trim().toLowerCase();
+  return host === "localhost" || host === "127.0.0.1";
+};
+
 // Centralized CDN asset URLs
 export const CDN_ASSETS = {
   companyRoom: {
@@ -130,7 +139,25 @@ export const CHART_MARGIN = { left: 60, right: 20, top: 20, bottom: 40 };
 export const AXIS_TICKS = 5;
 
 // WebSocket configuration
-export const WS_URL = import.meta.env.VITE_WS_URL || "ws://localhost:8000";
+const DEFAULT_CONTROL_API_BASE = isLocalDevHost()
+  ? "http://localhost:8000/api"
+  : "/api";
+const DEFAULT_RUNTIME_API_BASE = isLocalDevHost()
+  ? "http://localhost:8003/api/runtime"
+  : `${DEFAULT_CONTROL_API_BASE}/runtime`;
+export const CONTROL_API_BASE =
+  trimTrailingSlash(import.meta.env.VITE_CONTROL_API_BASE_URL || "") || DEFAULT_CONTROL_API_BASE;
+export const RUNTIME_API_BASE =
+  trimTrailingSlash(import.meta.env.VITE_RUNTIME_API_BASE_URL || "") ||
+  DEFAULT_RUNTIME_API_BASE;
+const FALLBACK_WS_PROTOCOL =
+  typeof window !== "undefined" && window.location.protocol === "https:"
+    ? "wss:"
+    : "ws:";
+const FALLBACK_WS_HOST =
+  typeof window !== "undefined" ? window.location.hostname : "localhost";
+export const WS_URL =
+  import.meta.env.VITE_WS_URL || `${FALLBACK_WS_PROTOCOL}//${FALLBACK_WS_HOST}:8765`;
 
 // Initial ticker symbols for the production watchlist
 export const INITIAL_TICKERS = [