feat: 架构修复 - P0/P1 问题全面修复

P0 修复:
- runtimeStore: 添加缺失的 lastDayHistory 字段
- Gateway/RuntimeService: 状态同步改为内存优先，消除 glob 竞态
- App.jsx: 从 3075 行重构到 ~500 行，提取 8 个独立文件

P1 修复:
- CORS: 4 个服务改为从环境变量读取允许 origins
- MarketStore: 改为模块级单例模式
- Domain 层: 删除 trading thin wrapper，保留 news 真实逻辑
- 测试: 补齐 77 个 gateway/runtime 测试

新增文件:
- backend/tests/test_gateway.py (43 tests)
- frontend/src/hooks/useWebSocketHandler.js
- frontend/src/hooks/useStockRequestCallbacks.js
- frontend/src/hooks/useAgentCallbacks.js
- frontend/src/hooks/useRuntimeCallbacks.js
- frontend/src/hooks/useWatchlistCallbacks.js
- frontend/src/components/TickerBar.jsx
- frontend/src/components/HeaderRight.jsx
- frontend/src/components/ChartTabs.jsx

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

backend/apps/trading_service.py

@@ -8,7 +8,16 @@ from typing import Any
 from fastapi import FastAPI, Query
 from fastapi.middleware.cors import CORSMiddleware
 
-from backend.domains import trading as trading_domain
+from backend.config.env_config import get_cors_origins
+from backend.services.market import MarketService
+from backend.tools.data_tools import (
+    get_company_news,
+    get_financial_metrics,
+    get_insider_trades,
+    get_market_cap,
+    get_prices,
+    search_line_items,
+)
 from shared.schema import (
     CompanyNewsResponse,
     FinancialMetricsResponse,
@@ -28,7 +37,7 @@ def create_app() -> FastAPI:
 
     app.add_middleware(
         CORSMiddleware,
-        allow_origins=["*"],
+        allow_origins=get_cors_origins(),
         allow_credentials=True,
         allow_methods=["*"],
         allow_headers=["*"],
@@ -45,12 +54,8 @@ def create_app() -> FastAPI:
         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"])
+        prices = get_prices(ticker=ticker, start_date=start_date, end_date=end_date)
+        return PriceResponse(ticker=ticker, prices=prices)
 
     @app.get("/api/financials", response_model=FinancialMetricsResponse)
     async def api_get_financials(
@@ -59,13 +64,13 @@ def create_app() -> FastAPI:
         period: str = Query("ttm"),
         limit: int = Query(10, ge=1, le=100),
     ) -> FinancialMetricsResponse:
-        payload = trading_domain.get_financials_payload(
+        metrics = get_financial_metrics(
             ticker=ticker,
             end_date=end_date,
             period=period,
             limit=limit,
         )
-        return FinancialMetricsResponse(financial_metrics=payload["financial_metrics"])
+        return FinancialMetricsResponse(financial_metrics=metrics)
 
     @app.get("/api/news", response_model=CompanyNewsResponse)
     async def api_get_news(
@@ -74,13 +79,13 @@ def create_app() -> FastAPI:
         start_date: str | None = Query(None),
         limit: int = Query(1000, ge=1, le=5000),
     ) -> CompanyNewsResponse:
-        payload = trading_domain.get_news_payload(
+        news = get_company_news(
             ticker=ticker,
             end_date=end_date,
             start_date=start_date,
             limit=limit,
         )
-        return CompanyNewsResponse(news=payload["news"])
+        return CompanyNewsResponse(news=news)
 
     @app.get("/api/insider-trades", response_model=InsiderTradeResponse)
     async def api_get_insider_trades(
@@ -89,18 +94,19 @@ def create_app() -> FastAPI:
         start_date: str | None = Query(None),
         limit: int = Query(1000, ge=1, le=5000),
     ) -> InsiderTradeResponse:
-        payload = trading_domain.get_insider_trades_payload(
+        trades = get_insider_trades(
             ticker=ticker,
             end_date=end_date,
             start_date=start_date,
             limit=limit,
         )
-        return InsiderTradeResponse(insider_trades=payload["insider_trades"])
+        return InsiderTradeResponse(insider_trades=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()
+        service = MarketService(tickers=[])
+        return service.get_market_status()
 
     @app.get("/api/market-cap")
     async def api_get_market_cap(
@@ -108,10 +114,12 @@ def create_app() -> FastAPI:
         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,
-        )
+        market_cap = get_market_cap(ticker=ticker, end_date=end_date)
+        return {
+            "ticker": ticker,
+            "end_date": end_date,
+            "market_cap": market_cap,
+        }
 
     @app.get("/api/line-items", response_model=LineItemResponse)
     async def api_get_line_items(
@@ -121,14 +129,14 @@ def create_app() -> FastAPI:
         period: str = Query("ttm"),
         limit: int = Query(10, ge=1, le=100),
     ) -> LineItemResponse:
-        payload = trading_domain.get_line_items_payload(
+        items = search_line_items(
             ticker=ticker,
             line_items=line_items,
             end_date=end_date,
             period=period,
             limit=limit,
         )
-        return LineItemResponse(search_results=payload["search_results"])
+        return LineItemResponse(search_results=items)
 
     return app