diff --git a/backend/internal/mildware/auth.go b/backend/internal/mildware/auth.go
index 550da71..b10a7d3 100755
--- a/backend/internal/mildware/auth.go
+++ b/backend/internal/mildware/auth.go
@@ -2,6 +2,7 @@ package mildware
 
 import (
 	"net/http"
+	"strconv"
 	"strings"
 
 	"gen2d/internal/logger"
@@ -45,7 +46,23 @@ func AuthMiddleware(jwtSecret string) gin.HandlerFunc {
 		}
 
 		if sub, ok := claims["sub"]; ok {
-			c.Set("userID", sub)
+			var userID uint
+			switch v := sub.(type) {
+			case float64:
+				userID = uint(v)
+			case int:
+				userID = uint(v)
+			case int64:
+				userID = uint(v)
+			case uint:
+				userID = v
+			case string:
+				num, err := strconv.ParseUint(v, 10, 64)
+				if err == nil {
+					userID = uint(num)
+				}
+			}
+			c.Set("userID", userID)
 		}
 
 		c.Next()
diff --git a/docs/api.md b/docs/api.md
index ecae802..a78417f 100755
--- a/docs/api.md
+++ b/docs/api.md
@@ -213,7 +213,7 @@ POST /api/v1/prompt/optimize
 
 ## 工程管理
 
-需认证。以下接口均需通过 Cookie 携带 Token，工程归属于当前登录用户。
+需认证。以下接口均需通过 `Authorization: Bearer <token>` 请求头携带 Token，工程归属于当前登录用户。
 
 | 状态 | 方法 | 路径 | 说明 |
 |------|------|------|------|