feat: 添加批量获取K线数据的 mock handler

- 新增 /api/stock/batch-kline POST 接口 mock
- 支持批量获取多只股票的分时图和日K线数据
- 修复事件详情页面相关股票的K线和分时图无数据问题

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/mocks/handlers/stock.js

@@ -224,4 +224,59 @@ export const stockHandlers = [
             );
         }
     }),
+
+    // 批量获取股票K线数据
+    http.post('/api/stock/batch-kline', async ({ request }) => {
+        await delay(400);
+
+        try {
+            const body = await request.json();
+            const { codes, type = 'timeline', event_time } = body;
+
+            console.log('[Mock Stock] 批量获取K线数据:', {
+                stockCount: codes?.length,
+                type,
+                eventTime: event_time
+            });
+
+            if (!codes || !Array.isArray(codes) || codes.length === 0) {
+                return HttpResponse.json(
+                    { error: '股票代码列表不能为空' },
+                    { status: 400 }
+                );
+            }
+
+            // 为每只股票生成数据
+            const batchData = {};
+            codes.forEach(stockCode => {
+                let data;
+                if (type === 'timeline') {
+                    data = generateTimelineData('000001.SH');
+                } else if (type === 'daily') {
+                    data = generateDailyData('000001.SH', 60);
+                } else {
+                    data = [];
+                }
+
+                batchData[stockCode] = {
+                    success: true,
+                    data: data,
+                    stock_code: stockCode
+                };
+            });
+
+            return HttpResponse.json({
+                success: true,
+                data: batchData,
+                type: type,
+                message: '批量获取成功'
+            });
+        } catch (error) {
+            console.error('[Mock Stock] 批量获取K线数据失败:', error);
+            return HttpResponse.json(
+                { error: '批量获取K线数据失败' },
+                { status: 500 }
+            );
+        }
+    }),
 ];