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/news_service.py

@@ -0,0 +1,153 @@
+# -*- coding: utf-8 -*-
+"""News and explain FastAPI surface."""
+
+from __future__ import annotations
+
+from typing import Any
+
+from fastapi import Depends, FastAPI, Query
+from fastapi.middleware.cors import CORSMiddleware
+
+from backend.data.market_store import MarketStore
+from backend.domains import news as news_domain
+
+
+def get_market_store() -> MarketStore:
+    """Create a market store dependency."""
+    return MarketStore()
+
+
+def create_app() -> FastAPI:
+    """Create the news/explain service app."""
+    app = FastAPI(
+        title="EvoTraders News Service",
+        description="Read-only news enrichment and explain 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]:
+        return {"status": "healthy", "service": "news-service"}
+
+    @app.get("/api/enriched-news")
+    async def api_get_enriched_news(
+        ticker: str = Query(..., min_length=1),
+        start_date: str | None = Query(None),
+        end_date: str | None = Query(None),
+        limit: int = Query(100, ge=1, le=1000),
+        store: MarketStore = Depends(get_market_store),
+    ) -> dict[str, Any]:
+        return news_domain.get_enriched_news(
+            store,
+            ticker=ticker,
+            start_date=start_date,
+            end_date=end_date,
+            limit=limit,
+        )
+
+    @app.get("/api/news-for-date")
+    async def api_get_news_for_date(
+        ticker: str = Query(..., min_length=1),
+        date: str = Query(...),
+        limit: int = Query(20, ge=1, le=100),
+        store: MarketStore = Depends(get_market_store),
+    ) -> dict[str, Any]:
+        return news_domain.get_news_for_date(
+            store,
+            ticker=ticker,
+            date=date,
+            limit=limit,
+        )
+
+    @app.get("/api/news-timeline")
+    async def api_get_news_timeline(
+        ticker: str = Query(..., min_length=1),
+        start_date: str = Query(...),
+        end_date: str = Query(...),
+        store: MarketStore = Depends(get_market_store),
+    ) -> dict[str, Any]:
+        return news_domain.get_news_timeline(
+            store,
+            ticker=ticker,
+            start_date=start_date,
+            end_date=end_date,
+        )
+
+    @app.get("/api/categories")
+    async def api_get_categories(
+        ticker: str = Query(..., min_length=1),
+        start_date: str | None = Query(None),
+        end_date: str | None = Query(None),
+        limit: int = Query(200, ge=1, le=1000),
+        store: MarketStore = Depends(get_market_store),
+    ) -> dict[str, Any]:
+        return news_domain.get_news_categories(
+            store,
+            ticker=ticker,
+            start_date=start_date,
+            end_date=end_date,
+            limit=limit,
+        )
+
+    @app.get("/api/similar-days")
+    async def api_get_similar_days(
+        ticker: str = Query(..., min_length=1),
+        date: str = Query(...),
+        n_similar: int = Query(5, ge=1, le=20),
+        store: MarketStore = Depends(get_market_store),
+    ) -> dict[str, Any]:
+        return news_domain.get_similar_days_payload(
+            store,
+            ticker=ticker,
+            date=date,
+            n_similar=n_similar,
+        )
+
+    @app.get("/api/stories/{ticker}")
+    async def api_get_story(
+        ticker: str,
+        as_of_date: str = Query(...),
+        store: MarketStore = Depends(get_market_store),
+    ) -> dict[str, Any]:
+        return news_domain.get_story_payload(
+            store,
+            ticker=ticker,
+            as_of_date=as_of_date,
+        )
+
+    @app.get("/api/range-explain")
+    async def api_get_range_explain(
+        ticker: str = Query(..., min_length=1),
+        start_date: str = Query(...),
+        end_date: str = Query(...),
+        article_ids: list[str] = Query(default=[]),
+        limit: int = Query(100, ge=1, le=500),
+        store: MarketStore = Depends(get_market_store),
+    ) -> dict[str, Any]:
+        return news_domain.get_range_explain_payload(
+            store,
+            ticker=ticker,
+            start_date=start_date,
+            end_date=end_date,
+            article_ids=article_ids,
+            limit=limit,
+        )
+
+    return app
+
+
+app = create_app()
+
+
+if __name__ == "__main__":
+    import uvicorn
+
+    uvicorn.run(app, host="0.0.0.0", port=8002)