Feature user and admin panels (#30)

server/middleware/admin.go

@@ -0,0 +1,22 @@
+package middleware
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+// RequireAdmin returns middleware that restricts access to admin users.
+// Must be used after Auth() middleware which sets "role" in context.
+func RequireAdmin() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		role, exists := c.Get("role")
+		if !exists || role != "admin" {
+			c.AbortWithStatusJSON(http.StatusForbidden, gin.H{
+				"error": "admin access required",
+			})
+			return
+		}
+		c.Next()
+	}
+}