feat(channels): support telegram and imessage

- replace the Discord-only config with multi-channel official channels selection

- add Telegram token handling and iMessage platform-aware runtime gating

- expand CLI, dashboard, and tests for Telegram, Discord, and iMessage

Refs #783

tests/unit/commands/config-channels-command.test.ts

@@ -2,26 +2,36 @@ import { describe, expect, it } from 'bun:test';
 import { parseChannelsCommandArgs } from '../../../src/commands/config-channels-command';
 
 describe('config channels command parser', () => {
-  it('parses toggles and token input', () => {
+  it('parses selection, unattended mode, and token input', () => {
     const result = parseChannelsCommandArgs([
-      '--enable',
+      '--set',
+      'telegram,discord',
       '--unattended',
       '--set-token',
-      'discord-secret',
+      'telegram=telegram-secret',
     ]);
 
-    expect(result.enable).toBe(true);
+    expect(result.setSelection).toBe('telegram,discord');
     expect(result.unattended).toBe(true);
-    expect(result.setToken).toBe('discord-secret');
+    expect(result.setToken).toEqual({
+      channelId: 'telegram',
+      token: 'telegram-secret',
+    });
   });
 
-  it('supports inline token assignment and clear flags', () => {
-    const result = parseChannelsCommandArgs(['--disable', '--no-unattended', '--set-token=abc']);
-    const clearResult = parseChannelsCommandArgs(['--clear-token']);
+  it('supports inline token assignment, legacy flags, and clear-token variants', () => {
+    const result = parseChannelsCommandArgs([
+      '--disable',
+      '--no-unattended',
+      '--set-token=abc',
+    ]);
+    const clearAll = parseChannelsCommandArgs(['--clear-token']);
+    const clearOne = parseChannelsCommandArgs(['--clear-token', 'discord']);
 
     expect(result.disable).toBe(true);
     expect(result.noUnattended).toBe(true);
-    expect(result.setToken).toBe('abc');
-    expect(clearResult.clearToken).toBe(true);
+    expect(result.setToken).toEqual({ channelId: 'discord', token: 'abc' });
+    expect(clearAll.clearTokenAll).toBe(true);
+    expect(clearOne.clearTokenChannel).toBe('discord');
   });
 });