feat(api): GET /api/moments 朋友圈列表(desc分页+账号头部)

对齐云客员工聊天窗口朋友圈tab:帖子 create_time desc 分页 +
wechat_account 头部(昵称/头像/别名);员工不存在不404(header全None
前端兜底)。头像提取抽共享 helper account_avatar 放 organization.py,
accounts 列表与 moments 头部复用。

Co-Authored-By: Claude <noreply@anthropic.com>

yunke-server/app/api/schemas.py

@@ -422,3 +422,55 @@ class SessionListOut(BaseModel):
     channel: str
     today_start: int
     sessions: list[SessionOut]
+
+
+# ---------------------------------------------------------------------------
+# Moments (员工朋友圈)
+# ---------------------------------------------------------------------------
+
+
+class MomentsHeaderOut(BaseModel):
+    """朋友圈头部 — 员工账号昵称/头像/别名(wechat_account 表)。
+
+    员工微信号不存在时三个字段全 ``None``(不 404,前端资料卡兜底)。
+    ``avatar`` 从 ``raw_json.headImageUrl`` 提取(共享 helper
+    :func:`app.api.routers.organization.account_avatar`)。
+    """
+
+    nickname: str | None = None
+    avatar: str | None = None
+    alias: str | None = None
+
+
+class MomentsPostOut(BaseModel):
+    """朋友圈帖子行(moments_post 表,``from_attributes`` 直读)。
+
+    结构化列驱动帖子卡片(正文/图片/点赞/评论);点赞/评论为上游 JSON
+    数组原样透传,由前端解析渲染。
+    """
+
+    model_config = ConfigDict(from_attributes=True)
+
+    id: str
+    wechat_id: str
+    sns_id: str | None = None
+    author_name: str | None = None
+    author_wxid: str | None = None
+    author_avatar: str | None = None
+    content: str | None = None
+    type_raw: str | None = None
+    create_time: int | None = None  # ms epoch
+    praise_json: list[dict[str, Any]] | None = None
+    comment_json: list[dict[str, Any]] | None = None
+    image_urls: list[str] | None = None
+
+
+class MomentsListOut(BaseModel):
+    """GET /api/moments 响应:账号头部 + 分页帖子(create_time desc)。"""
+
+    wechat_id: str
+    header: MomentsHeaderOut
+    total: int
+    page: int
+    page_size: int
+    items: list[MomentsPostOut]