refactor: 完成多语言国际化全量替换与补充

1. 新增大量中英文语言包文件，覆盖自定义组件、页面、工具类的文案
2. 替换硬编码文本为多语言调用，统一全局文案管理
3. 优化语言包结构，拆分公共模块与业务模块
4. 修复部分语言加载与国际化适配问题

lang/en-us/ai-chat/index.js

@@ -42,6 +42,14 @@ export const lang = {
 	loadHistoryFail: 'Failed to load history',
 	about: '0B',
 
+	// ====== ai-chat-message - Auto Reply Templates ======
+	autoReplyGreeting: 'Hello! I am the AI customer service assistant, glad to serve you! How can I help you?',
+	autoReplyPrice: 'Our product prices vary by model and configuration. Please check the product detail page for specific prices.',
+	autoReplyShipping: 'Generally, orders are shipped within 24 hours. Please check the logistics information for specific timelines.',
+	autoReplyReturn: '7-day no-reason return is supported. Please ensure the product is in good condition.',
+	autoReplyService: 'Our customer service hours are 9:00-18:00. Feel free to contact us if you have any questions.',
+	autoReplyDefault: 'Thank you for your inquiry! Regarding your question about "{question}", our professional customer service will answer you as soon as possible. You can also check our help documentation for more information.',
+
 	// ====== ai-chat-search ======
 	searchEntrance: 'Search',
 	searchPlaceholder: 'Search chat history',
@@ -118,5 +126,14 @@ export const lang = {
 	menuClearChat: 'Clear Chat',
 	menuExport: 'Export Records',
 	menuSettings: 'Settings',
-	menuHelp: 'Help'
+	menuHelp: 'Help',
+
+	// ====== index.vue - Console Logs (for debugging) ======
+	logOnShowTriggered: '[AI Chat Page] onShow triggered',
+	logOnUnloadTriggered: '[AI Chat Page] onUnload triggered',
+	logKeyboardChangeUnavailable: 'onKeyboardHeightChange unavailable',
+	logEventHandleError: 'Event handling error',
+	logInitNavbarFailed: 'Failed to initialize navigation bar',
+	logChatComponentNotInit: 'Chat component not initialized',
+	logServicerConfigNotLoaded: '[AI Customer Service] servicerConfig not loaded, retrying after 200ms...'
 }