fix: 修复 ConceptStatsPanel API Mock 数据格式问题

解决控制台 "无法访问概念统计API" 错误，完善 Mock Service Worker 的统计数据返回格式

**问题原因**
1. Mock 模式下，`/statistics` 端点返回的数据格式不完整
2. 缺少必需的 `success` 和 `data` 包装层
3. 缺少 5 个必需字段：`hot_concepts`, `cold_concepts`, `active_concepts`, `volatile_concepts`, `momentum_concepts`

**修复内容**
1. 创建 `generateConceptStats()` 函数（lines 50-104）
   - 生成热门概念（涨幅前5）
   - 生成冷门概念（跌幅前5）
   - 生成活跃概念（新闻+研报最多）
   - 生成波动概念（波动率最高）
   - 生成动量概念（连续上涨天数最多）

2. 更新 `http://111.198.58.126:16801/statistics` handler（lines 273-300）
   - 返回完整的统计数据格式
   - 包装为 `{ success: true, data: {...} }`
   - 支持 `min_stock_count`, `days`, `start_date`, `end_date` 参数

3. 新增 `/concept-api/statistics` handler（lines 302-329）
   - 覆盖 nginx 代理路由
   - 与直接 API 返回相同格式的数据
   - 确保两个端点都能正常工作

**数据格式**
```json
{
  "success": true,
  "data": {
    "hot_concepts": [...],
    "cold_concepts": [...],
    "active_concepts": [...],
    "volatile_concepts": [...],
    "momentum_concepts": [...]
  },
  "note": "Mock 数据",
  "params": { ... },
  "updated_at": "2025-10-30T..."
}
```

**测试结果**
- ✅ 编译成功
- ✅ ConceptStatsPanel 可以正确接收 Mock 数据
- ✅ 不再显示 "无法访问概念统计API" 错误
- ✅ 两个 API 端点（代理 + 直接）都已覆盖

**文件修改**
- src/mocks/handlers/concept.js (+79 lines)
  - 新增 generateConceptStats() 函数
  - 更新 /statistics handler
  - 新增 /concept-api/statistics handler

src/mocks/handlers/concept.js

@@ -47,6 +47,62 @@ const generatePopularConcepts = (size = 20) => {
     return results;
 };
 
+// 生成完整的概念统计数据（用于 ConceptStatsPanel）
+const generateConceptStats = () => {
+    // 热门概念（涨幅最大的前5）
+    const hot_concepts = [
+        { name: '小米大模型', change_pct: 18.76, stock_count: 12, news_count: 35 },
+        { name: '人工智能', change_pct: 15.67, stock_count: 45, news_count: 23 },
+        { name: '新能源汽车', change_pct: 12.34, stock_count: 38, news_count: 18 },
+        { name: '芯片概念', change_pct: 9.87, stock_count: 52, news_count: 31 },
+        { name: '5G通信', change_pct: 8.45, stock_count: 29, news_count: 15 },
+    ];
+
+    // 冷门概念（跌幅最大的前5）
+    const cold_concepts = [
+        { name: '房地产', change_pct: -8.76, stock_count: 33, news_count: 12 },
+        { name: '煤炭开采', change_pct: -6.54, stock_count: 25, news_count: 8 },
+        { name: '传统零售', change_pct: -5.43, stock_count: 19, news_count: 6 },
+        { name: '钢铁冶炼', change_pct: -4.21, stock_count: 28, news_count: 9 },
+        { name: '纺织服装', change_pct: -3.98, stock_count: 15, news_count: 4 },
+    ];
+
+    // 活跃概念（新闻+研报最多的前5）
+    const active_concepts = [
+        { name: '人工智能', news_count: 89, report_count: 15, total_mentions: 104 },
+        { name: '芯片概念', news_count: 76, report_count: 12, total_mentions: 88 },
+        { name: '新能源汽车', news_count: 65, report_count: 18, total_mentions: 83 },
+        { name: '生物医药', news_count: 54, report_count: 9, total_mentions: 63 },
+        { name: '量子科技', news_count: 41, report_count: 7, total_mentions: 48 },
+    ];
+
+    // 波动最大的概念（前5）
+    const volatile_concepts = [
+        { name: '区块链', volatility: 23.45, avg_change: 3.21, max_change: 12.34 },
+        { name: '元宇宙', volatility: 21.87, avg_change: 2.98, max_change: 11.76 },
+        { name: '虚拟现实', volatility: 19.65, avg_change: -1.23, max_change: 9.87 },
+        { name: '游戏概念', volatility: 18.32, avg_change: 4.56, max_change: 10.45 },
+        { name: '在线教育', volatility: 17.89, avg_change: -2.11, max_change: 8.76 },
+    ];
+
+    // 动量概念（连续上涨的前5）
+    const momentum_concepts = [
+        { name: '数字经济', consecutive_days: 5, total_change: 18.76, avg_daily: 3.75 },
+        { name: '云计算', consecutive_days: 4, total_change: 14.32, avg_daily: 3.58 },
+        { name: '物联网', consecutive_days: 4, total_change: 12.89, avg_daily: 3.22 },
+        { name: '大数据', consecutive_days: 3, total_change: 11.45, avg_daily: 3.82 },
+        { name: '工业互联网', consecutive_days: 3, total_change: 9.87, avg_daily: 3.29 },
+    ];
+
+    return {
+        hot_concepts,
+        cold_concepts,
+        active_concepts,
+        volatile_concepts,
+        momentum_concepts
+    };
+};
+
 // 概念相关的 Handlers
 export const conceptHandlers = [
     // 搜索概念（热门概念）
@@ -214,23 +270,60 @@ export const conceptHandlers = [
         }
     }),
 
-    // 获取统计数据
+    // 获取统计数据（直接访问外部 API）
     http.get('http://111.198.58.126:16801/statistics', async ({ request }) => {
         await delay(300);
 
         const url = new URL(request.url);
         const minStockCount = parseInt(url.searchParams.get('min_stock_count') || '3');
         const days = parseInt(url.searchParams.get('days') || '7');
+        const startDate = url.searchParams.get('start_date');
+        const endDate = url.searchParams.get('end_date');
 
-        console.log('[Mock Concept] 获取统计数据:', { minStockCount, days });
+        console.log('[Mock Concept] 获取统计数据 (直接API):', { minStockCount, days, startDate, endDate });
+
+        // 生成完整的统计数据
+        const statsData = generateConceptStats();
 
         return HttpResponse.json({
-            total_concepts: 150,
+            success: true,
-            active_concepts: 120,
+            data: statsData,
-            avg_stock_count: 25,
+            note: 'Mock 数据',
-            top_concepts: generatePopularConcepts(10),
+            params: {
-            min_stock_count: minStockCount,
+                min_stock_count: minStockCount,
-            days: days,
+                days: days,
+                start_date: startDate,
+                end_date: endDate
+            },
+            updated_at: new Date().toISOString()
+        });
+    }),
+
+    // 获取统计数据（通过 nginx 代理）
+    http.get('/concept-api/statistics', async ({ request }) => {
+        await delay(300);
+
+        const url = new URL(request.url);
+        const minStockCount = parseInt(url.searchParams.get('min_stock_count') || '3');
+        const days = parseInt(url.searchParams.get('days') || '7');
+        const startDate = url.searchParams.get('start_date');
+        const endDate = url.searchParams.get('end_date');
+
+        console.log('[Mock Concept] 获取统计数据 (nginx代理):', { minStockCount, days, startDate, endDate });
+
+        // 生成完整的统计数据
+        const statsData = generateConceptStats();
+
+        return HttpResponse.json({
+            success: true,
+            data: statsData,
+            note: 'Mock 数据（通过 nginx 代理）',
+            params: {
+                min_stock_count: minStockCount,
+                days: days,
+                start_date: startDate,
+                end_date: endDate
+            },
             updated_at: new Date().toISOString()
         });
     }),