chore(src): 针对上传权限，提供更多有价值的信息

src/app/model/upload/Upload.php

@@ -890,11 +890,13 @@ class Upload extends BaseModel
      */
     public function checkPath($path)
     {
-        if (file_exists($path) || mkdir($path, 0755, true)) {
+        try {
-            return $this->success();
+            if (file_exists($path) || mkdir($path, 0755, true)) {
+                return $this->success();
+            }
+        } catch (\Exception $e) {
+            return $this->error('', "上传目录 {$path} 创建失败，请检测权限:" . $e->getMessage());
         }
-
-        return $this->error('', "上传目录 {$path} 创建失败，请检测权限");
     }
 
     /**