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>

backend/apps/trading_service.py

@@ -0,0 +1,142 @@
+# -*- coding: utf-8 -*-
+"""Trading data FastAPI surface."""
+
+from __future__ import annotations
+
+from typing import Any
+
+from fastapi import FastAPI, Query
+from fastapi.middleware.cors import CORSMiddleware
+
+from backend.domains import trading as trading_domain
+from shared.schema import (
+    CompanyNewsResponse,
+    FinancialMetricsResponse,
+    InsiderTradeResponse,
+    LineItemResponse,
+    PriceResponse,
+)
+
+
+def create_app() -> FastAPI:
+    """Create the trading data service app."""
+    app = FastAPI(
+        title="EvoTraders Trading Service",
+        description="Read-only trading data service surface extracted from the monolith",
+        version="0.1.0",
+    )
+
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=["*"],
+        allow_credentials=True,
+        allow_methods=["*"],
+        allow_headers=["*"],
+    )
+
+    @app.get("/health")
+    async def health_check() -> dict[str, str]:
+        """Health check endpoint."""
+        return {"status": "healthy", "service": "trading-service"}
+
+    @app.get("/api/prices", response_model=PriceResponse)
+    async def api_get_prices(
+        ticker: str = Query(..., min_length=1),
+        start_date: str = Query(...),
+        end_date: str = Query(...),
+    ) -> PriceResponse:
+        payload = trading_domain.get_prices_payload(
+            ticker=ticker,
+            start_date=start_date,
+            end_date=end_date,
+        )
+        return PriceResponse(ticker=payload["ticker"], prices=payload["prices"])
+
+    @app.get("/api/financials", response_model=FinancialMetricsResponse)
+    async def api_get_financials(
+        ticker: str = Query(..., min_length=1),
+        end_date: str = Query(...),
+        period: str = Query("ttm"),
+        limit: int = Query(10, ge=1, le=100),
+    ) -> FinancialMetricsResponse:
+        payload = trading_domain.get_financials_payload(
+            ticker=ticker,
+            end_date=end_date,
+            period=period,
+            limit=limit,
+        )
+        return FinancialMetricsResponse(financial_metrics=payload["financial_metrics"])
+
+    @app.get("/api/news", response_model=CompanyNewsResponse)
+    async def api_get_news(
+        ticker: str = Query(..., min_length=1),
+        end_date: str = Query(...),
+        start_date: str | None = Query(None),
+        limit: int = Query(1000, ge=1, le=5000),
+    ) -> CompanyNewsResponse:
+        payload = trading_domain.get_news_payload(
+            ticker=ticker,
+            end_date=end_date,
+            start_date=start_date,
+            limit=limit,
+        )
+        return CompanyNewsResponse(news=payload["news"])
+
+    @app.get("/api/insider-trades", response_model=InsiderTradeResponse)
+    async def api_get_insider_trades(
+        ticker: str = Query(..., min_length=1),
+        end_date: str = Query(...),
+        start_date: str | None = Query(None),
+        limit: int = Query(1000, ge=1, le=5000),
+    ) -> InsiderTradeResponse:
+        payload = trading_domain.get_insider_trades_payload(
+            ticker=ticker,
+            end_date=end_date,
+            start_date=start_date,
+            limit=limit,
+        )
+        return InsiderTradeResponse(insider_trades=payload["insider_trades"])
+
+    @app.get("/api/market/status")
+    async def api_get_market_status() -> dict[str, Any]:
+        """Return current market status using the existing market service logic."""
+        return trading_domain.get_market_status_payload()
+
+    @app.get("/api/market-cap")
+    async def api_get_market_cap(
+        ticker: str = Query(..., min_length=1),
+        end_date: str = Query(...),
+    ) -> dict[str, Any]:
+        """Return market cap for one ticker/date."""
+        return trading_domain.get_market_cap_payload(
+            ticker=ticker,
+            end_date=end_date,
+        )
+
+    @app.get("/api/line-items", response_model=LineItemResponse)
+    async def api_get_line_items(
+        ticker: str = Query(..., min_length=1),
+        line_items: list[str] = Query(...),
+        end_date: str = Query(...),
+        period: str = Query("ttm"),
+        limit: int = Query(10, ge=1, le=100),
+    ) -> LineItemResponse:
+        payload = trading_domain.get_line_items_payload(
+            ticker=ticker,
+            line_items=line_items,
+            end_date=end_date,
+            period=period,
+            limit=limit,
+        )
+        return LineItemResponse(search_results=payload["search_results"])
+
+    return app
+
+
+app = create_app()
+
+
+if __name__ == "__main__":
+    import uvicorn
+
+    uvicorn.run(app, host="0.0.0.0", port=8001)