feat(conversation): enhance empty state UI and improve quick action descriptions

- Add new chat empty state image asset (chatEmpty.png)
- Update English quick action descriptions with more compelling copy for applications, knowledge base, memory conversation, and help center
- Update Chinese quick action descriptions with concise, marketing-focused messaging
- Replace conversation empty state image from generic background to dedicated chat empty illustration
- Improve user experience with clearer value propositions for each quick action feature

web/src/i18n/en.ts

@@ -184,15 +184,15 @@ export const en = {
       createNewMemorySummary: 'Create New Memory Entry',
 
       createNewApplication: 'Create New Application',
-      createNewApplicationDesc: 'Create New Space Application',
+      createNewApplicationDesc: 'Build an app in just 3 minutes with zero-code drag-and-drop.',
 
       createNewKnowledge: 'Create New Knowledge',
-      createNewKnowledgeDesc: 'Create a new memory entry',
+      createNewKnowledgeDesc: 'Transform your data into a fully searchable, dedicated knowledge base in seconds.',
 
       memoryConversation: 'Memory Conversation',
-      memoryConversationDesc: 'Memory Conversation',
+      memoryConversationDesc: 'The more you use it, the better AI understands you.',
       helpCenter: 'Help Center',
-      helpCenterDesc: 'Help Center',
+      helpCenterDesc: 'One-stop support to answer your questions and get you started fast.',
       memorySummary: 'View Memory Summary',
       memorySummaryDesc: 'View Memory Summary Report',
 

web/src/i18n/zh.ts

@@ -782,15 +782,15 @@ export const zh = {
       createNewMemorySummary: '创建新记忆条目',
 
       createNewApplication: '创建新应用',
-      createNewApplicationDesc: '创建新空间应用',
+      createNewApplicationDesc: '零代码拖拽3分钟创应用',
 
-      createNewKnowledge: '创建新知识',
+      createNewKnowledge: '创建知识库',
-      createNewKnowledgeDesc: '创建新记忆条目',
+      createNewKnowledgeDesc: '秒变可搜索的专属知识库',
 
       memoryConversation: '记忆对话',
-      memoryConversationDesc: '记忆对话',
+      memoryConversationDesc: '让AI越用越懂你',
       helpCenter: '帮助中心',
-      helpCenterDesc: '帮助中心',
+      helpCenterDesc: '一站式解决疑问快速上手',
       memorySummary: '查看记忆摘要',
       memorySummaryDesc: '查看记忆摘要报告',
 

web/src/views/Conversation/index.tsx

@@ -11,6 +11,7 @@ import Empty from '@/components/Empty'
 import { formatDateTime } from '@/utils/format';
 import { randomString } from '@/utils/common'
 import BgImg from '@/assets/images/conversation/bg.png'
+import ChatEmpty from '@/assets/images/empty/chatEmpty.png'
 import Chat from '@/components/Chat'
 import type { ChatItem } from '@/components/Chat/types'
 import ButtonCheckbox from '@/components/ButtonCheckbox'
@@ -261,7 +262,7 @@ const Conversation: FC = () => {
       <div className="rb:relative rb:h-screen rb:px-4 rb:flex-[1_1_auto]">
         <div className='rb:w-[760px]  rb:h-screen rb:mx-auto rb:pt-10'>
         <Chat
-          empty={<Empty url={BgImg} className="rb:h-full" size={[320,180]} subTitle={t('memoryConversation.emptyDesc')} />}
+          empty={<Empty url={ChatEmpty} className="rb:h-full" size={[320,180]} subTitle={t('memoryConversation.emptyDesc')} />}
           contentClassName="rb:h-[calc(100%-152px)] "
           data={chatList}
           streamLoading={streamLoading}