Add Telegram and Discord IM channels

plugin-src/client/channels/telegram/api.js

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+import { TOKEN_BOT_ENDPOINTS, createTokenChannelApi } from '../shared/token-api.js';
+
+export const TELEGRAM_RPC_CHANNEL = '/telegram';
+export const TELEGRAM_ENDPOINTS = TOKEN_BOT_ENDPOINTS;
+
+const api = createTokenChannelApi('Telegram', ' Bot API 长轮询');
+
+export const unwrapRpcResult = api.unwrapRpcResult;
+export const normalizeSnapshot = api.normalizeSnapshot;
+export const presentError = api.presentError;
+export { api as telegramClientApi };

plugin-src/client/channels/telegram/index.js

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+import { TelegramLogoGlyph } from '../../channel-logos.js';
+import { createTokenChannelSettings } from '../shared/token-channel.js';
+import {
+  TELEGRAM_ENDPOINTS,
+  telegramClientApi,
+} from './api.js';
+import { installTelegramStyles } from './styles.js';
+
+const channel = createTokenChannelSettings({
+  channel: 'Telegram',
+  endpoints: TELEGRAM_ENDPOINTS,
+  api: telegramClientApi,
+  LogoGlyph: TelegramLogoGlyph,
+  installStyles: installTelegramStyles,
+  pageClass: 'dtg-page',
+  avatarClass: 'dtg-avatar',
+  connectionLabel: 'Bot API 长轮询',
+  tokenPlaceholder: '填写 @BotFather 生成的 Bot Token',
+  emptyTitle: '接入 Telegram 机器人',
+  emptyDescription: '先通过 @BotFather 获取 Bot Token，再在这里完成接入。',
+  platformLabel: 'Telegram',
+});
+
+export const TelegramSettingsTab = channel.SettingsTab;
+export const TelegramAccountCard = channel.AccountCard;

plugin-src/client/channels/telegram/styles.js

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+export const TELEGRAM_STYLE_ID = 'xmanrui-dsh-im-telegram-settings';
+
+const CSS = String.raw`
+.dtg-page { --ddt-accent: #229ed9; --ddt-accent-deep: #1687bd; --ddt-accent-wash: #eaf7fd; }
+.dtg-avatar { color: #fff; background: #229ed9; }
+.dtg-avatar svg { display: block; }
+`;
+
+export function installTelegramStyles() {
+  if (typeof document === 'undefined') return () => {};
+  const existing = document.querySelector(`style[data-plugin-css="${TELEGRAM_STYLE_ID}"]`);
+  if (existing) return () => {};
+  const style = document.createElement('style');
+  style.dataset.plugin = '@xmanrui/dsh-im';
+  style.dataset.pluginCss = TELEGRAM_STYLE_ID;
+  style.textContent = CSS;
+  document.head.appendChild(style);
+  return () => style.remove();
+}