修复 画布，mcp服务，搜索，文档的接口

api/apps/models/kb_models.py

@@ -60,9 +60,16 @@ class CreateKnowledgeBaseRequest(BaseModel):
 class UpdateKnowledgeBaseRequest(BaseModel):
     """更新知识库请求"""
     kb_id: str
-    name: str
-    description: str
-    parser_id: str
+    name: Optional[str] = None
+    avatar: Optional[str] = None
+    language: Optional[str] = None
+    description: Optional[str] = None
+    permission: Optional[str] = None
+    doc_num: Optional[int] = None
+    token_num: Optional[int] = None
+    chunk_num: Optional[int] = None
+    parser_id: Optional[str] = None
+    embd_id: Optional[str] = None
     pagerank: Optional[int] = None
     # 其他可选字段，但排除 id, tenant_id, created_by, create_time, update_time, create_date, update_date