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/tests/test_news_service_app.py

@@ -0,0 +1,180 @@
+# -*- coding: utf-8 -*-
+"""Tests for the extracted news service app surface."""
+
+from fastapi.testclient import TestClient
+
+from backend.apps.news_service import create_app
+
+
+class _FakeStore:
+    def get_ticker_watermarks(self, symbol):
+        return {"symbol": symbol, "last_news_fetch": "2026-12-31"}
+
+    def get_news_timeline_enriched(self, symbol, start_date=None, end_date=None):
+        return [{"date": end_date, "count": 1}]
+
+    def get_news_items(self, symbol, start_date=None, end_date=None, limit=100):
+        return [{"id": "news-raw-1", "ticker": symbol, "title": "Raw Title", "date": end_date}]
+
+    def get_news_items_enriched(self, symbol, start_date=None, end_date=None, trade_date=None, limit=100):
+        return [{"id": "news-1", "ticker": symbol, "title": "Title", "date": trade_date or end_date}]
+
+    def upsert_news_analysis(self, symbol, rows):
+        return len(rows)
+
+    def get_analyzed_news_ids(self, symbol, start_date=None, end_date=None):
+        return set()
+
+    def get_news_categories_enriched(self, symbol, start_date=None, end_date=None, limit=200):
+        return {"market": {"label": "market", "count": 1, "article_ids": ["news-1"]}}
+
+    def get_news_by_ids_enriched(self, symbol, article_ids):
+        return [{"id": article_ids[0], "ticker": symbol, "title": "Picked"}]
+
+
+def test_news_service_routes_are_exposed():
+    app = create_app()
+    paths = {route.path for route in app.routes}
+
+    assert "/health" in paths
+    assert "/api/enriched-news" in paths
+    assert "/api/news-for-date" in paths
+    assert "/api/news-timeline" in paths
+    assert "/api/categories" in paths
+    assert "/api/similar-days" in paths
+    assert "/api/stories/{ticker}" in paths
+    assert "/api/range-explain" in paths
+
+
+def test_news_service_enriched_news_and_categories(monkeypatch):
+    app = create_app()
+    app.dependency_overrides.clear()
+    from backend.apps import news_service as news_service_module
+
+    app.dependency_overrides[news_service_module.get_market_store] = lambda: _FakeStore()
+    monkeypatch.setattr(
+        "backend.domains.news.enrich_news_for_symbol",
+        lambda *args, **kwargs: {"symbol": "AAPL", "analyzed": 1},
+    )
+
+    with TestClient(app) as client:
+        news_response = client.get(
+            "/api/enriched-news",
+            params={"ticker": "AAPL", "end_date": "2026-03-23"},
+        )
+        categories_response = client.get(
+            "/api/categories",
+            params={"ticker": "AAPL", "end_date": "2026-03-23"},
+        )
+
+    assert news_response.status_code == 200
+    assert news_response.json()["news"][0]["ticker"] == "AAPL"
+    assert categories_response.status_code == 200
+    assert categories_response.json()["categories"]["market"]["count"] == 1
+
+
+def test_news_service_news_for_date_and_timeline(monkeypatch):
+    app = create_app()
+    from backend.apps import news_service as news_service_module
+
+    app.dependency_overrides[news_service_module.get_market_store] = lambda: _FakeStore()
+    monkeypatch.setattr(
+        "backend.domains.news.enrich_news_for_symbol",
+        lambda *args, **kwargs: {"symbol": "AAPL", "analyzed": 1},
+    )
+
+    with TestClient(app) as client:
+        date_response = client.get(
+            "/api/news-for-date",
+            params={"ticker": "AAPL", "date": "2026-03-23"},
+        )
+        timeline_response = client.get(
+            "/api/news-timeline",
+            params={
+                "ticker": "AAPL",
+                "start_date": "2026-03-01",
+                "end_date": "2026-03-23",
+            },
+        )
+
+    assert date_response.status_code == 200
+    assert date_response.json()["date"] == "2026-03-23"
+    assert timeline_response.status_code == 200
+    assert timeline_response.json()["timeline"][0]["count"] == 1
+
+
+def test_news_service_similar_days_and_story(monkeypatch):
+    app = create_app()
+    from backend.apps import news_service as news_service_module
+
+    app.dependency_overrides[news_service_module.get_market_store] = lambda: _FakeStore()
+    monkeypatch.setattr(
+        "backend.domains.news.enrich_news_for_symbol",
+        lambda *args, **kwargs: {"symbol": "AAPL", "analyzed": 1},
+    )
+    monkeypatch.setattr(
+        "backend.domains.news.find_similar_days",
+        lambda store, symbol, target_date, top_k: {
+            "symbol": symbol,
+            "target_date": target_date,
+            "items": [{"date": "2026-03-20", "score": 0.9}],
+        },
+    )
+    monkeypatch.setattr(
+        "backend.domains.news.get_or_create_stock_story",
+        lambda store, symbol, as_of_date: {
+            "symbol": symbol,
+            "as_of_date": as_of_date,
+            "story": "story body",
+            "source": "local",
+        },
+    )
+
+    with TestClient(app) as client:
+        similar_response = client.get(
+            "/api/similar-days",
+            params={"ticker": "AAPL", "date": "2026-03-23", "n_similar": 3},
+        )
+        story_response = client.get(
+            "/api/stories/AAPL",
+            params={"as_of_date": "2026-03-23"},
+        )
+
+    assert similar_response.status_code == 200
+    assert similar_response.json()["items"][0]["score"] == 0.9
+    assert story_response.status_code == 200
+    assert story_response.json()["story"] == "story body"
+
+
+def test_news_service_range_explain(monkeypatch):
+    app = create_app()
+    from backend.apps import news_service as news_service_module
+
+    app.dependency_overrides[news_service_module.get_market_store] = lambda: _FakeStore()
+    monkeypatch.setattr(
+        "backend.domains.news.enrich_news_for_symbol",
+        lambda *args, **kwargs: {"symbol": "AAPL", "analyzed": 1},
+    )
+    monkeypatch.setattr(
+        "backend.domains.news.build_range_explanation",
+        lambda ticker, start_date, end_date, news_rows: {
+            "symbol": ticker,
+            "news_count": len(news_rows),
+            "start_date": start_date,
+            "end_date": end_date,
+        },
+    )
+
+    with TestClient(app) as client:
+        response = client.get(
+            "/api/range-explain",
+            params={
+                "ticker": "AAPL",
+                "start_date": "2026-03-01",
+                "end_date": "2026-03-23",
+                "article_ids": ["news-7"],
+            },
+        )
+
+    assert response.status_code == 200
+    assert response.json()["result"]["news_count"] == 1