feat(threads): add basic message thread API and web thread panel

web/src/api/chats.ts

@@ -76,6 +76,13 @@ export async function searchMessages(query: string, chatId?: number): Promise<Me
   return data;
 }
 
+export async function getMessageThread(messageId: number, limit = 100): Promise<Message[]> {
+  const { data } = await http.get<Message[]>(`/messages/${messageId}/thread`, {
+    params: { limit }
+  });
+  return data;
+}
+
 export async function sendMessage(chatId: number, text: string, type: MessageType = "text"): Promise<Message> {
   const { data } = await http.post<Message>("/messages", { chat_id: chatId, text, type });
   return data;