[feature/backend] implement /users handler + switch to username + add display name + user management cli

api/schemas/components/schemas.yaml

@@ -60,12 +60,20 @@ User:
   type: object
   required:
     - id
-    - email
+    - username
     - role
     - status
   properties:
     id:
       type: integer
+    username:
+      type: string
+      minLength: 3
+      maxLength: 32
+    display_name:
+      type: string
+      maxLength: 64
+      description: 用户显示名称
     email:
       type: string
       format: email
@@ -74,11 +82,13 @@ User:
       enum:
         - admin
         - editor
+        - contributor
     status:
       type: string
       enum:
         - active
         - inactive
+        - banned
     created_at:
       type: string
       format: date-time