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/tests/test_trading_service_app.py

@@ -24,20 +24,17 @@ def test_trading_service_routes_are_exposed():
 
 def test_trading_service_prices_endpoint(monkeypatch):
     monkeypatch.setattr(
-        "backend.domains.trading.get_prices_payload",
-        lambda ticker, start_date, end_date: {
-            "ticker": ticker,
-            "prices": [
-                Price(
-                    open=1.0,
-                    close=2.0,
-                    high=2.5,
-                    low=0.5,
-                    volume=100,
-                    time="2026-03-20",
-                )
-            ],
-        },
+        "backend.apps.trading_service.get_prices",
+        lambda ticker, start_date, end_date: [
+            Price(
+                open=1.0,
+                close=2.0,
+                high=2.5,
+                low=0.5,
+                volume=100,
+                time="2026-03-20",
+            )
+        ],
     )
 
     with TestClient(create_app()) as client:
@@ -57,56 +54,54 @@ def test_trading_service_prices_endpoint(monkeypatch):
 
 def test_trading_service_financials_endpoint(monkeypatch):
     monkeypatch.setattr(
-        "backend.domains.trading.get_financials_payload",
-        lambda ticker, end_date, period, limit: {
-            "financial_metrics": [
-                FinancialMetrics(
-                    ticker=ticker,
-                    report_period=end_date,
-                    period=period,
-                    currency="USD",
-                    market_cap=123.0,
-                    enterprise_value=None,
-                    price_to_earnings_ratio=None,
-                    price_to_book_ratio=None,
-                    price_to_sales_ratio=None,
-                    enterprise_value_to_ebitda_ratio=None,
-                    enterprise_value_to_revenue_ratio=None,
-                    free_cash_flow_yield=None,
-                    peg_ratio=None,
-                    gross_margin=None,
-                    operating_margin=None,
-                    net_margin=None,
-                    return_on_equity=None,
-                    return_on_assets=None,
-                    return_on_invested_capital=None,
-                    asset_turnover=None,
-                    inventory_turnover=None,
-                    receivables_turnover=None,
-                    days_sales_outstanding=None,
-                    operating_cycle=None,
-                    working_capital_turnover=None,
-                    current_ratio=None,
-                    quick_ratio=None,
-                    cash_ratio=None,
-                    operating_cash_flow_ratio=None,
-                    debt_to_equity=None,
-                    debt_to_assets=None,
-                    interest_coverage=None,
-                    revenue_growth=None,
-                    earnings_growth=None,
-                    book_value_growth=None,
-                    earnings_per_share_growth=None,
-                    free_cash_flow_growth=None,
-                    operating_income_growth=None,
-                    ebitda_growth=None,
-                    payout_ratio=None,
-                    earnings_per_share=None,
-                    book_value_per_share=None,
-                    free_cash_flow_per_share=None,
-                )
-            ]
-        },
+        "backend.apps.trading_service.get_financial_metrics",
+        lambda ticker, end_date, period, limit: [
+            FinancialMetrics(
+                ticker=ticker,
+                report_period=end_date,
+                period=period,
+                currency="USD",
+                market_cap=123.0,
+                enterprise_value=None,
+                price_to_earnings_ratio=None,
+                price_to_book_ratio=None,
+                price_to_sales_ratio=None,
+                enterprise_value_to_ebitda_ratio=None,
+                enterprise_value_to_revenue_ratio=None,
+                free_cash_flow_yield=None,
+                peg_ratio=None,
+                gross_margin=None,
+                operating_margin=None,
+                net_margin=None,
+                return_on_equity=None,
+                return_on_assets=None,
+                return_on_invested_capital=None,
+                asset_turnover=None,
+                inventory_turnover=None,
+                receivables_turnover=None,
+                days_sales_outstanding=None,
+                operating_cycle=None,
+                working_capital_turnover=None,
+                current_ratio=None,
+                quick_ratio=None,
+                cash_ratio=None,
+                operating_cash_flow_ratio=None,
+                debt_to_equity=None,
+                debt_to_assets=None,
+                interest_coverage=None,
+                revenue_growth=None,
+                earnings_growth=None,
+                book_value_growth=None,
+                earnings_per_share_growth=None,
+                free_cash_flow_growth=None,
+                operating_income_growth=None,
+                ebitda_growth=None,
+                payout_ratio=None,
+                earnings_per_share=None,
+                book_value_per_share=None,
+                free_cash_flow_per_share=None,
+            )
+        ],
     )
 
     with TestClient(create_app()) as client:
@@ -121,26 +116,22 @@ def test_trading_service_financials_endpoint(monkeypatch):
 
 def test_trading_service_news_and_insider_endpoints(monkeypatch):
     monkeypatch.setattr(
-        "backend.domains.trading.get_news_payload",
-        lambda ticker, end_date, start_date=None, limit=1000: {
-            "news": [
-                CompanyNews(
-                    ticker=ticker,
-                    title="News title",
-                    source="polygon",
-                    url="https://example.com/news",
-                    date=end_date,
-                )
-            ]
-        },
+        "backend.apps.trading_service.get_company_news",
+        lambda ticker, end_date, start_date=None, limit=1000: [
+            CompanyNews(
+                ticker=ticker,
+                title="News title",
+                source="polygon",
+                url="https://example.com/news",
+                date=end_date,
+            )
+        ],
     )
     monkeypatch.setattr(
-        "backend.domains.trading.get_insider_trades_payload",
-        lambda ticker, end_date, start_date=None, limit=1000: {
-            "insider_trades": [
-                InsiderTrade(ticker=ticker, filing_date=end_date)
-            ]
-        },
+        "backend.apps.trading_service.get_insider_trades",
+        lambda ticker, end_date, start_date=None, limit=1000: [
+            InsiderTrade(ticker=ticker, filing_date=end_date)
+        ],
     )
 
     with TestClient(create_app()) as client:
@@ -165,8 +156,8 @@ def test_trading_service_market_status_endpoint(monkeypatch):
             return {"status": "open", "status_text": "Open"}
 
     monkeypatch.setattr(
-        "backend.domains.trading.get_market_status_payload",
-        lambda: _FakeMarketService().get_market_status(),
+        "backend.apps.trading_service.MarketService",
+        lambda tickers: _FakeMarketService(),
     )
 
     with TestClient(create_app()) as client:
@@ -178,12 +169,8 @@ def test_trading_service_market_status_endpoint(monkeypatch):
 
 def test_trading_service_market_cap_endpoint(monkeypatch):
     monkeypatch.setattr(
-        "backend.domains.trading.get_market_cap_payload",
-        lambda ticker, end_date: {
-            "ticker": ticker,
-            "end_date": end_date,
-            "market_cap": 3.5e12,
-        },
+        "backend.apps.trading_service.get_market_cap",
+        lambda ticker, end_date: 3.5e12,
     )
 
     with TestClient(create_app()) as client:
@@ -202,18 +189,16 @@ def test_trading_service_market_cap_endpoint(monkeypatch):
 
 def test_trading_service_line_items_endpoint(monkeypatch):
     monkeypatch.setattr(
-        "backend.domains.trading.get_line_items_payload",
-        lambda ticker, line_items, end_date, period, limit: {
-            "search_results": [
-                LineItem(
-                    ticker=ticker,
-                    report_period=end_date,
-                    period=period,
-                    currency="USD",
-                    free_cash_flow=123.0,
-                )
-            ]
-        },
+        "backend.apps.trading_service.search_line_items",
+        lambda ticker, line_items, end_date, period, limit: [
+            LineItem(
+                ticker=ticker,
+                report_period=end_date,
+                period=period,
+                currency="USD",
+                free_cash_flow=123.0,
+            )
+        ],
     )
 
     with TestClient(create_app()) as client: