feat(history): complete messaging core before multi-account gateways

src/types/ai.ts

@@ -8,6 +8,7 @@ export interface AiReplySuggestion {
   id: string
   style: ReplyStyle
   content: string
+  translationCn: string
   targetLang: string
   reason: string
   knowledgeRefs: string[]
@@ -40,6 +41,18 @@ export interface TranslateResult {
   translated: string
   detectedLang: string
   terms: { source: string; target: string }[]
+  historyItem?: TranslationHistoryItem
+}
+
+export interface TranslationHistoryItem {
+  id: string
+  sourceLang: string
+  targetLang: string
+  originalText: string
+  translatedText: string
+  detectedLang: string
+  favorite: boolean
+  createdAt: string
 }
 
 export type AiTextAction = 'polish' | 'translate' | 'shorten' | 'expand' | 'tone'