1、新增首页合计详情页；

2、新增索引和缓存；

cmd/server/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"github.com/gin-gonic/gin"
 	"gorm.io/driver/mysql"
 	"gorm.io/gorm"
 	"level_go/internal/api"
@@ -12,6 +13,8 @@ import (
 
 // main 是服务启动入口，负责完成配置加载、数据库连接、依赖组装和 HTTP 路由启动。
 func main() {
+	gin.SetMode(gin.ReleaseMode)
+
 	// 初始化配置文件，后续数据库 DSN 和服务端口都从全局配置中读取。
 	config.InitConfig()
 
@@ -21,6 +24,12 @@ func main() {
 	if err != nil {
 		log.Fatal("数据库连接失败:", err)
 	}
+	sqlDB, err := db.DB()
+	if err != nil {
+		log.Fatal("获取数据库连接池失败:", err)
+	}
+	sqlDB.SetMaxIdleConns(20)
+	sqlDB.SetMaxOpenConns(100)
 
 	// 依赖注入：Service 持有数据库连接，Handler 持有对应 Service。
 	commonSrv := &service.CommonService{DB: db}

database/ddl/20260514_perf_indexes.sql

@@ -0,0 +1,3 @@
+ALTER TABLE `stock_limit_combined_data`
+  ADD INDEX `idx_ts_code_date_status` (`ts_code`, `trade_date`, `final_status`),
+  ADD INDEX `idx_trade_status_code` (`trade_date`, `final_status`, `ts_code`);

database/ddl/current_tables.sql

@@ -110,5 +110,7 @@ CREATE TABLE `stock_limit_combined_data` (
   UNIQUE KEY `uniq_date_code` (`trade_date`,`ts_code`),
   KEY `idx_trade_date` (`trade_date`),
   KEY `idx_symbol` (`symbol`),
-  KEY `idx_trade_date_status` (`trade_date`,`final_status`)
+  KEY `idx_trade_date_status` (`trade_date`,`final_status`),
+  KEY `idx_ts_code_date_status` (`ts_code`,`trade_date`,`final_status`),
+  KEY `idx_trade_status_code` (`trade_date`,`final_status`,`ts_code`)
 ) ENGINE=InnoDB AUTO_INCREMENT=167035 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

docs/second-cal.md

@@ -63,6 +63,10 @@ GET /api/v1/limit-board/second-cal?tradeStartDate=2026-05-07&tradeEndDate=2026-0
 
 ### 4.2 list[].stocks 明细字段
 
+`list[].stocks` 保留当日全部二板明细。
+
+`list[].total_stocks` 为当日涨停和炸板合并后的明细列表，字段结构与 `stocks` 相同；该列表会剔除 `first_limit_time` 为空的数据，并按 `first_limit_time` 升序排序，时间相同时按 `ts_code` 升序排序。
+
 | 字段 | 类型 | 说明 |
 | --- | --- | --- |
 | `trade_date` | `string` | T 日 |
@@ -121,6 +125,31 @@ GET /api/v1/limit-board/second-cal?tradeStartDate=2026-05-07&tradeEndDate=2026-0
       "break_next_data_count": 3,
       "break_next_profit_count": 3,
       "break_next_profit_rate": 100,
+      "total_stocks": [
+        {
+          "trade_date": "2026-05-07",
+          "previous_trade_date": "2026-05-06",
+          "previous_two_trade_date": "2026-04-30",
+          "next_trade_date": "2026-05-08",
+          "symbol": "000001",
+          "ts_code": "000001.SZ",
+          "name": "示例股份",
+          "market": "主板",
+          "industry": "银行",
+          "previous_close": 10,
+          "limit_price": 11,
+          "t_high": 11,
+          "t_close": 11,
+          "t_pct_chg": 10,
+          "status": "limit",
+          "first_limit_time": "09:35:12",
+          "open_times": 0,
+          "next_high": 11.2,
+          "next_close": 11.1,
+          "next_intraday_profitable": true,
+          "next_high_profit_pct": 1.82
+        }
+      ],
       "stocks": [
         {
           "trade_date": "2026-05-07",

internal/model/limit_board.go

@@ -261,6 +261,7 @@ type SecondCalDay struct {
 	BreakNextProfitCount    int              `json:"break_next_profit_count"`    // 当日炸板股 T+1 盘中盈利数量。
 	BreakNextProfitRate     float64          `json:"break_next_profit_rate"`     // 当日炸板股 T+1 盘中盈利概率，百分比。
 	Stocks                  []SecondCalStock `json:"stocks"`                     // 当日二板股票明细。
+	TotalStocks             []SecondCalStock `json:"total_stocks"`               // 涨停和炸板合并后按首次涨停时间排序的明细。
 }
 
 // SecondCalResponse 是二板日历接口响应。

internal/router/cache.go

@@ -0,0 +1,115 @@
+package router
+
+import (
+	"bytes"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+const (
+	responseCacheTTL     = 5 * time.Minute
+	responseCacheMaxBody = 4 << 20
+	responseCacheMaxKeys = 512
+)
+
+type responseCacheEntry struct {
+	status      int
+	contentType string
+	body        []byte
+	expiresAt   time.Time
+}
+
+type responseCacheStore struct {
+	mu    sync.RWMutex
+	items map[string]responseCacheEntry
+}
+
+func newResponseCacheStore() *responseCacheStore {
+	return &responseCacheStore{items: make(map[string]responseCacheEntry)}
+}
+
+func (s *responseCacheStore) get(key string) (responseCacheEntry, bool) {
+	now := time.Now()
+
+	s.mu.RLock()
+	entry, ok := s.items[key]
+	s.mu.RUnlock()
+	if !ok {
+		return responseCacheEntry{}, false
+	}
+	if now.After(entry.expiresAt) {
+		s.mu.Lock()
+		if current, exists := s.items[key]; exists && now.After(current.expiresAt) {
+			delete(s.items, key)
+		}
+		s.mu.Unlock()
+		return responseCacheEntry{}, false
+	}
+	return entry, true
+}
+
+func (s *responseCacheStore) set(key string, entry responseCacheEntry) {
+	s.mu.Lock()
+	if len(s.items) >= responseCacheMaxKeys {
+		now := time.Now()
+		for cacheKey, current := range s.items {
+			if now.After(current.expiresAt) || len(s.items) >= responseCacheMaxKeys {
+				delete(s.items, cacheKey)
+			}
+		}
+	}
+	s.items[key] = entry
+	s.mu.Unlock()
+}
+
+type cachedResponseWriter struct {
+	gin.ResponseWriter
+	body *bytes.Buffer
+}
+
+func (w cachedResponseWriter) Write(data []byte) (int, error) {
+	w.body.Write(data)
+	return w.ResponseWriter.Write(data)
+}
+
+func cacheableGETResponseMiddleware(store *responseCacheStore) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if c.Request.Method != http.MethodGet || strings.HasPrefix(c.Request.URL.Path, "/api/v1/download/") {
+			c.Next()
+			return
+		}
+
+		key := c.Request.URL.RequestURI()
+		if entry, ok := store.get(key); ok {
+			c.Header("Content-Type", entry.contentType)
+			c.Data(entry.status, entry.contentType, entry.body)
+			return
+		}
+
+		body := bytes.NewBuffer(nil)
+		writer := cachedResponseWriter{ResponseWriter: c.Writer, body: body}
+		c.Writer = writer
+		c.Next()
+
+		status := c.Writer.Status()
+		if status != http.StatusOK || body.Len() == 0 || body.Len() > responseCacheMaxBody {
+			return
+		}
+
+		contentType := c.Writer.Header().Get("Content-Type")
+		if !strings.Contains(contentType, "application/json") {
+			return
+		}
+
+		store.set(key, responseCacheEntry{
+			status:      status,
+			contentType: contentType,
+			body:        append([]byte(nil), body.Bytes()...),
+			expiresAt:   time.Now().Add(responseCacheTTL),
+		})
+	}
+}

internal/router/router.go

@@ -9,7 +9,8 @@ import (
 //
 // 函数集中注册跨域中间件和 v1 版本接口，调用方只需要注入各业务 Handler。
 func NewRouter(commonApi *api.CommonHandler, stockApi *api.StockHandler, limitBoardApi *api.LimitBoardHandler) *gin.Engine {
-	r := gin.Default()
+	r := gin.New()
+	r.Use(gin.Recovery())
 
 	// 跨域中间件允许前端从任意来源访问接口，并暴露 CSV 下载需要的 Content-Disposition。
 	r.Use(func(c *gin.Context) {
@@ -23,6 +24,7 @@ func NewRouter(commonApi *api.CommonHandler, stockApi *api.StockHandler, limitBo
 		}
 		c.Next()
 	})
+	r.Use(cacheableGETResponseMiddleware(newResponseCacheStore()))
 
 	v1 := r.Group("/api/v1")
 	{

internal/service/second_cal_service.go

@@ -2,6 +2,8 @@ package service
 
 import (
 	"math"
+	"sort"
+	"strings"
 
 	"level_go/internal/model"
 )
@@ -57,6 +59,7 @@ func (s *LimitBoardService) GetSecondCal(req model.SecondCalRequest) (model.Seco
 			PreviousTwoTradeDate: day.PreviousTwoTradeDate,
 			NextTradeDate:        day.NextTradeDate,
 			Stocks:               []model.SecondCalStock{},
+			TotalStocks:          []model.SecondCalStock{},
 		})
 	}
 
@@ -298,10 +301,19 @@ func accumulateSecondCalDay(day *model.SecondCalDay, item model.SecondCalStock)
 		}
 	}
 	day.Stocks = append(day.Stocks, item)
+	if strings.TrimSpace(item.FirstLimitTime) != "" {
+		day.TotalStocks = append(day.TotalStocks, item)
+	}
 }
 
 // finalizeSecondCalDay 计算单个交易日的概率字段。
 func finalizeSecondCalDay(day *model.SecondCalDay) {
+	sort.SliceStable(day.TotalStocks, func(i, j int) bool {
+		if day.TotalStocks[i].FirstLimitTime == day.TotalStocks[j].FirstLimitTime {
+			return day.TotalStocks[i].TsCode < day.TotalStocks[j].TsCode
+		}
+		return day.TotalStocks[i].FirstLimitTime < day.TotalStocks[j].FirstLimitTime
+	})
 	day.NextIntradayProfitRate = secondCalRate(day.NextIntradayProfitCount, day.NextTradeDataCount)
 	day.LimitNextProfitRate = secondCalRate(day.LimitNextProfitCount, day.LimitNextDataCount)
 	day.BreakNextProfitRate = secondCalRate(day.BreakNextProfitCount, day.BreakNextDataCount)