feat(user): 昵称上限放宽到 20 字(与客户端/原型一致) (#63)

Co-authored-by: zzhyyyyy <2685922758@qq.com>
Reviewed-on: #63
Co-authored-by: zhuzihao <zhuzihao@wonderable.ai>
Co-committed-by: zhuzihao <zhuzihao@wonderable.ai>

app/schemas/feedback.py

@@ -12,3 +12,17 @@ class FeedbackOut(BaseModel):
     id: int
     status: str
     created_at: datetime
+
+
+class FeedbackQrConfigOut(BaseModel):
+    """反馈页二维码卡配置(运营后台可配)。App 反馈页据此渲染整张「加群二维码」卡。
+
+    image_url 是相对 /media 路径(客户端按自己的 BASE_URL 拼绝对地址),为空 → 客户端走本地兜底。
+    """
+
+    enabled: bool
+    image_url: str | None = None
+    title: str
+    group_name: str
+    subtitle: str
+