feat(main, handlers): initialize random number generator and enhance URL stats response format

- Added initialization of a random number generator in main.go to support future features.
- Refactored HandleURLStats in handlers.go to return URL statistics in a structured format, improving API response clarity and usability.

handlers/handlers.go

@@ -144,12 +144,25 @@ func (h *Handlers) HandleStats(w http.ResponseWriter, r *http.Request) {
 
 func (h *Handlers) HandleURLStats(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
-	services.Mu.RLock()
-	response := map[string]interface{}{
-		"paths": services.CSVPathsCache,
+	stats := services.GetURLCounts()
+
+	// 转换为前端期望的格式
+	response := make(map[string]struct {
+		TotalURLs int `json:"total_urls"`
+	})
+
+	for endpoint, stat := range stats {
+		response[endpoint] = struct {
+			TotalURLs int `json:"total_urls"`
+		}{
+			TotalURLs: stat.TotalURLs,
+		}
+	}
+
+	if err := json.NewEncoder(w).Encode(response); err != nil {
+		http.Error(w, "Error encoding response", http.StatusInternalServerError)
+		return
 	}
-	services.Mu.RUnlock()
-	json.NewEncoder(w).Encode(response)
 }
 
 func (h *Handlers) HandleMetrics(w http.ResponseWriter, r *http.Request) {

main.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"log"
+	"math/rand"
 	"net/http"
 	"os"
 	"os/signal"
@@ -35,6 +36,10 @@ func (a *App) Initialize() error {
 		return err
 	}
 
+	// 初始化随机数生成器
+	source := rand.NewSource(time.Now().UnixNano())
+	config.InitRNG(rand.New(source))
+
 	// 然后创建必要的目录
 	if err := os.MkdirAll(config.Get().Storage.DataDir, 0755); err != nil {
 		return fmt.Errorf("failed to create data directory: %w", err)