feat: add LangBot Space ChatCompletions requester and integrate with ModelsDialog and EmbeddingForm components

src/langbot/pkg/provider/modelmgr/requesters/spacechatcmpl.py

@@ -0,0 +1,17 @@
+from __future__ import annotations
+
+import typing
+import openai
+
+from . import chatcmpl
+
+
+class LangBotSpaceChatCompletions(chatcmpl.OpenAIChatCompletions):
+    """LangBot Space ChatCompletion API 请求器"""
+
+    client: openai.AsyncClient
+
+    default_config: dict[str, typing.Any] = {
+        'base_url': 'https://api.langbot.cloud/v1',
+        'timeout': 120,
+    }