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>

frontend/src/components/StockExplainView.jsx

@@ -77,6 +77,7 @@ export default function StockExplainView({
     visibleNews,
     newsCategories,
     visibleNewsByCategory,
+    selectedNewsFreshness,
     selectedRangeWindow,
     selectedRangeExplain,
     latestSignal,
@@ -337,6 +338,7 @@ export default function StockExplainView({
             newsSnapshot={newsSnapshot}
             visibleNewsByCategory={visibleNewsByCategory}
             visibleNews={visibleNews}
+            selectedNewsFreshness={selectedNewsFreshness}
             activeNewsCategory={activeNewsCategory}
             onSelectNewsCategory={setActiveNewsCategory}
             activeNewsSentiment={activeNewsSentiment}

frontend/src/components/explain/ExplainNewsSection.jsx

@@ -1,6 +1,12 @@
 import React from 'react';
 import { formatDateTime } from '../../utils/formatters';
 
+function renderFreshness(freshness) {
+  if (!freshness || typeof freshness !== 'object') return null;
+  const lastFetch = freshness.last_news_fetch || '-';
+  return `新闻更新到 ${lastFetch}${freshness.refreshed ? ' · 本次已刷新' : ''}`;
+}
+
 function categoryLabel(value) {
   const normalized = String(value || '').trim().toLowerCase();
   const labels = {
@@ -47,6 +53,7 @@ export default function ExplainNewsSection({
   newsSnapshot,
   visibleNewsByCategory,
   visibleNews,
+  selectedNewsFreshness,
   activeNewsCategory,
   onSelectNewsCategory,
   activeNewsSentiment,
@@ -64,6 +71,11 @@ export default function ExplainNewsSection({
           <div style={{ fontSize: 11, color: '#666666' }}>
             {newsSnapshot?.source ? `最近 ${visibleNewsByCategory.length} 条 · ${newsSnapshot.source}` : `最近 ${visibleNewsByCategory.length} 条真实新闻`}
           </div>
+          {renderFreshness(selectedNewsFreshness) ? (
+            <div style={{ fontSize: 11, color: '#666666' }}>
+              {renderFreshness(selectedNewsFreshness)}
+            </div>
+          ) : null}
           <button
             onClick={onToggle}
             style={{

frontend/src/components/explain/ExplainRangeSection.jsx

@@ -1,6 +1,12 @@
 import React from 'react';
 import { formatTickerPrice } from '../../utils/formatters';
 
+function renderFreshness(freshness) {
+  if (!freshness || typeof freshness !== 'object') return null;
+  const lastFetch = freshness.last_news_fetch || '-';
+  return `新闻更新到 ${lastFetch}${freshness.refreshed ? ' · 本次已刷新' : ''}`;
+}
+
 function renderSentimentLabel(value) {
   const normalized = String(value || '').trim().toLowerCase();
   if (normalized === 'positive') return '利多';
@@ -94,6 +100,11 @@ export default function ExplainRangeSection({
                 : `分析来源 · ${renderAnalysisSourceLabel(selectedRangeExplain.analysis.analysis_source)}`}
             </div>
           ) : null}
+          {renderFreshness(selectedRangeExplain?.freshness) ? (
+            <div style={{ fontSize: 11, color: '#666666' }}>
+              {renderFreshness(selectedRangeExplain?.freshness)}
+            </div>
+          ) : null}
           <button
             onClick={onToggle}
             style={{

frontend/src/components/explain/ExplainSimilarDaysSection.jsx

@@ -1,5 +1,11 @@
 import React from 'react';
 
+function renderFreshness(freshness) {
+  if (!freshness || typeof freshness !== 'object') return null;
+  const lastFetch = freshness.last_news_fetch || '-';
+  return `新闻更新到 ${lastFetch}${freshness.refreshed ? ' · 本次已刷新' : ''}`;
+}
+
 export default function ExplainSimilarDaysSection({
   selectedSimilarDays,
   selectedEventDate,
@@ -15,6 +21,11 @@ export default function ExplainSimilarDaysSection({
           <div style={{ fontSize: 11, color: '#666666' }}>
             {selectedEventDate || '先选择一个事件日期'}
           </div>
+          {renderFreshness(selectedSimilarDays?.freshness) ? (
+            <div style={{ fontSize: 11, color: '#666666' }}>
+              {renderFreshness(selectedSimilarDays?.freshness)}
+            </div>
+          ) : null}
           <button
             onClick={onToggle}
             style={{

frontend/src/components/explain/ExplainStorySection.jsx

@@ -2,6 +2,12 @@ import React from 'react';
 import ReactMarkdown from 'react-markdown';
 import remarkGfm from 'remark-gfm';
 
+function renderFreshness(freshness) {
+  if (!freshness || typeof freshness !== 'object') return null;
+  const lastFetch = freshness.last_news_fetch || '-';
+  return `新闻更新到 ${lastFetch}${freshness.refreshed ? ' · 本次已刷新' : ''}`;
+}
+
 export default function ExplainStorySection({
   selectedStory,
   selectedSymbol,
@@ -17,6 +23,11 @@ export default function ExplainStorySection({
           <div style={{ fontSize: 11, color: '#666666' }}>
             {selectedStory?.asOfDate || currentDate || '按当前解释窗口生成'}
           </div>
+          {renderFreshness(selectedStory?.freshness) ? (
+            <div style={{ fontSize: 11, color: '#666666' }}>
+              {renderFreshness(selectedStory?.freshness)}
+            </div>
+          ) : null}
           <button
             onClick={onToggle}
             style={{

frontend/src/components/explain/useExplainModel.js

@@ -226,6 +226,13 @@ export default function useExplainModel({
     return similarCache[selectedEventDate] || null;
   }, [newsSnapshot, selectedEventDate]);
 
+  const selectedNewsFreshness = useMemo(() => {
+    if (selectedEventDate && newsSnapshot?.byDateFreshness?.[selectedEventDate]) {
+      return newsSnapshot.byDateFreshness[selectedEventDate];
+    }
+    return newsSnapshot?.categoriesFreshness || newsSnapshot?.timelineFreshness || newsSnapshot?.freshness || null;
+  }, [newsSnapshot, selectedEventDate]);
+
   const latestSignal = tickerSignals[0] || null;
   const priceColor = selectedTicker?.change > 0 ? '#00C853' : selectedTicker?.change < 0 ? '#FF1744' : '#000000';
   const exposureWeight = holding && Number.isFinite(Number(holding.weight)) ? Number(holding.weight) * 100 : null;
@@ -644,6 +651,7 @@ export default function useExplainModel({
     visibleNews,
     newsCategories,
     visibleNewsByCategory,
+    selectedNewsFreshness,
     selectedRangeWindow,
     selectedRangeExplain,
     selectedStory,