feat: make /transfer bidirectional across telegram and tui

src/commands/builtin/index.test.ts

@@ -1,6 +1,6 @@
 import { describe, it, expect, vi } from 'vitest';
 
-import { createContextCommand, createElevateCommand, createModelCommand, createQueueCommand, createResearchCommand } from './index.js';
+import { createContextCommand, createElevateCommand, createModelCommand, createQueueCommand, createResearchCommand, createTransferCommand } from './index.js';
 
 describe('builtin /model command', () => {
   it('passes through the full argument string', async () => {
@@ -169,3 +169,31 @@ describe('builtin /context command', () => {
     expect(result).toEqual({ handled: true, text: 'Context command is not available in this session.' });
   });
 });
+
+describe('builtin /transfer command', () => {
+  it('passes through the full target argument string', async () => {
+    const cmd = createTransferCommand();
+    const transferSession = vi.fn(() => 'Session transferred');
+    const result = await cmd.execute(['telegram'], {
+      channel: 'test',
+      senderId: 'user',
+      sessionId: 's1',
+      rawInput: '/transfer telegram',
+      services: { transferSession },
+    });
+    expect(transferSession).toHaveBeenCalledWith('telegram');
+    expect(result).toEqual({ handled: true, text: 'Session transferred' });
+  });
+
+  it('returns not-available when service is missing', async () => {
+    const cmd = createTransferCommand();
+    const result = await cmd.execute(['tui'], {
+      channel: 'test',
+      senderId: 'user',
+      sessionId: 's1',
+      rawInput: '/transfer tui',
+      services: {},
+    });
+    expect(result).toEqual({ handled: true, text: 'Transfer command is not available in this session.' });
+  });
+});