feat(message-gateway): add profile bot pairing card

frontend/lib/services/message-gateway/index.ts

@@ -3,3 +3,4 @@
 
 export * from './types';
 export * from './admin.service';
+export * from './user.service';

frontend/lib/services/message-gateway/user.service.ts

@@ -0,0 +1,29 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+import { BaseService } from '@/lib/services/core';
+import type {
+  BindMessageChannelRequest,
+  MessageBinding,
+  PublicMessageChannel,
+} from './types';
+
+export class UserMessageGatewayService extends BaseService {
+  protected static readonly basePath = '/api/v1/message-gateway';
+
+  static async listBindings(): Promise<MessageBinding[]> {
+    return this.get<MessageBinding[]>('/bindings');
+  }
+
+  static async listChannels(): Promise<PublicMessageChannel[]> {
+    return this.get<PublicMessageChannel[]>('/channels');
+  }
+
+  static async bind(data: BindMessageChannelRequest): Promise<MessageBinding> {
+    return this.post<MessageBinding>('/bindings', data);
+  }
+
+  static async unbind(id: string): Promise<void> {
+    return this.delete<void>(`/bindings/${id}`);
+  }
+}