更新.gitignore文件，移除不必要的soul-api目录，确保版本控制的清晰性与一致性。

soul-api/internal/middleware/secure.go

@@ -0,0 +1,25 @@
+package middleware
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/unrolled/secure"
+)
+
+// Secure 安全响应头中间件
+func Secure() gin.HandlerFunc {
+	s := secure.New(secure.Options{
+		FrameDeny:            true,
+		ContentTypeNosniff:   true,
+		BrowserXssFilter:     true,
+		ContentSecurityPolicy: "frame-ancestors 'none'",
+		ReferrerPolicy:       "no-referrer",
+	})
+	return func(c *gin.Context) {
+		err := s.Process(c.Writer, c.Request)
+		if err != nil {
+			c.Abort()
+			return
+		}
+		c.Next()
+	}
+}