Add zh/en i18n and follow DSH locale.bind for UI.

Wire API/delivery/tool strings through lib/i18n.js, and make the sidebar use ctx.locale.bind plus locale/change so English host preference no longer stays frozen on Chinese.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/delivery.js

@@ -3,6 +3,8 @@
  * Group jobs may also pin mentionJid so delivery @s the creator.
  */
 
+import { DEFAULT_LOCALE, t } from './i18n.js'
+
 export function normalizeDelivery(input = {}) {
   const src = input && typeof input === 'object' ? input : {}
   const kind = String(src.kind || 'dsh').trim().toLowerCase()
@@ -181,7 +183,7 @@ export function deliveryDraftFromPeer(peer) {
     // Non-WhatsApp peers are not auto-materialized yet.
     return null
   }
-  const name = String(peer.label || (isGroup ? 'WhatsApp 群聊' : 'WhatsApp 私聊')).trim().slice(0, 80)
+  const name = String(peer.label || (isGroup ? t('delivery.wa_group') : t('delivery.wa_dm'))).trim().slice(0, 80)
   const targetId = isGroup
     ? `auto-group-${slugId(routeJid, 'chat')}`
     : `auto-dm-${slugId(peer.phone || routeJid, 'user')}`
@@ -427,11 +429,13 @@ const IM_MAX_CHARS = 3500
  * Shared body for IM delivery and session mirror (without @mention prefix).
  * @param {object} job
  * @param {string} [summary]
+ * @param {'zh' | 'en' | string} [locale]
  */
-export function formatRunResultBody(job, summary) {
-  const text = String(summary || '').trim() || `(定时任务「${job?.name || ''}」已完成，无文本摘要)`
+export function formatRunResultBody(job, summary, locale = DEFAULT_LOCALE) {
+  const name = job?.name || ''
+  const text = String(summary || '').trim() || t('delivery.empty_summary', locale, { name })
   const clipped = text.length > IM_MAX_CHARS ? `${text.slice(0, IM_MAX_CHARS)}…` : text
-  return `【定时任务 · ${job?.name || ''}】\n${clipped}`
+  return `${t('delivery.header', locale, { name })}\n${clipped}`
 }
 
 /**