使用了AI重构项目，并完善了一部分后台问题

internal/api/analytics.go

@@ -0,0 +1,62 @@
+package api
+
+import (
+	"errors"
+	"io"
+	"net/http"
+	"strings"
+
+	"home-vue-go/internal/analytics"
+	"home-vue-go/internal/config"
+	"home-vue-go/internal/database"
+
+	"github.com/gin-gonic/gin"
+)
+
+func TestUmamiConnection(db *database.Database, appConfig *config.Config) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		var req struct {
+			Mode       *string `json:"mode"`
+			APIURL     *string `json:"apiUrl"`
+			WebsiteID  *string `json:"websiteId"`
+			Credential *string `json:"credential"`
+		}
+		if err := c.ShouldBindJSON(&req); err != nil && !errors.Is(err, io.EOF) {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "测试参数格式错误"})
+			return
+		}
+		settings, err := db.LoadSiteSettings(c.Request.Context())
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "加载统计配置失败"})
+			return
+		}
+		credential := ""
+		if req.Credential != nil {
+			credential = strings.TrimSpace(*req.Credential)
+		} else if settings.UmamiCredential != "" && appConfig != nil {
+			credential, err = appConfig.DecryptSecret(settings.UmamiCredential)
+			if err != nil {
+				c.JSON(http.StatusBadRequest, gin.H{"error": "已保存的统计凭据无法解密"})
+				return
+			}
+		}
+		mode := settings.UmamiAPIMode
+		apiURL := settings.UmamiAPIURL
+		websiteID := settings.UmamiWebsiteID
+		if req.Mode != nil {
+			mode = strings.TrimSpace(*req.Mode)
+		}
+		if req.APIURL != nil {
+			apiURL = strings.TrimSpace(*req.APIURL)
+		}
+		if req.WebsiteID != nil {
+			websiteID = strings.TrimSpace(*req.WebsiteID)
+		}
+		clientConfig := analytics.Config{Mode: mode, APIURL: apiURL, Credential: credential, WebsiteID: websiteID}
+		if err := umamiClient.Test(c.Request.Context(), clientConfig); err != nil {
+			c.JSON(http.StatusBadGateway, gin.H{"error": "Umami连接失败，请检查地址、Website ID 和凭据"})
+			return
+		}
+		c.JSON(http.StatusOK, gin.H{"ok": true, "message": "Umami连接成功"})
+	}
+}