feat: release contextual omnichannel customer platform

Add Telegram, WhatsApp and email account management, realtime messaging, contextual multilingual AI, customer intelligence, knowledge workflows, enterprise controls, a unified design system and complete repository documentation.

src/types/ai.ts

@@ -12,6 +12,7 @@ export interface AiReplySuggestion {
   targetLang: string
   reason: string
   knowledgeRefs: string[]
+  knowledgeRefIds?: string[]
   expectedEffect: string
   cultureTip?: string
 }
@@ -42,6 +43,13 @@ export interface TranslateResult {
   detectedLang: string
   terms: { source: string; target: string }[]
   historyItem?: TranslationHistoryItem
+  meta?: {
+    method: 'ai-contextual' | 'ai-direct'
+    contextApplied: boolean
+    contextMessageCount: number
+    conversationSummaryApplied?: boolean
+    model: string
+  }
 }
 
 export interface TranslationHistoryItem {