feat: add ai thinking anim

app/components/chat/index.tsx

@@ -11,6 +11,7 @@ import Tooltip from '@/app/components/base/tooltip'
 import Toast from '@/app/components/base/toast'
 import AutoHeightTextarea from '@/app/components/base/auto-height-textarea'
 import { Markdown } from '@/app/components/base/markdown'
+import LoadingAnim from './loading-anim'
 
 export type FeedbackFunc = (messageId: string, feedback: Feedbacktype) => Promise<any>
 
@@ -166,7 +167,13 @@ const Answer: FC<IAnswerProps> = ({ item, feedbackDisabled = false, onFeedback,
   return (
     <div key={id}>
       <div className='flex items-start'>
-        <div className={`${s.answerIcon} ${isResponsing ? s.typeingIcon : ''} w-10 h-10 shrink-0`}></div>
+        <div className={`${s.answerIcon} w-10 h-10 shrink-0`}>
+          {isResponsing &&
+            <div className={s.typeingIcon}>
+              <LoadingAnim type='avatar' />
+            </div>
+          }
+        </div>
         <div className={`${s.answerWrap}`}>
           <div className={`${s.answer} relative text-sm text-gray-900`}>
             <div className={'ml-2 py-3 px-4 bg-gray-100 rounded-tr-2xl rounded-b-2xl'}>
@@ -176,7 +183,13 @@ const Answer: FC<IAnswerProps> = ({ item, feedbackDisabled = false, onFeedback,
                   <div className='text-xs text-gray-500'>{t('app.chat.openingStatementTitle')}</div>
                 </div>
               )}
+              {(isResponsing && !content) ? (
+                <div className='flex items-center justify-center w-6 h-5'>
+                  <LoadingAnim type='text' />
+                </div>
+              ) : (
                 <Markdown content={content} />
+              )}
             </div>
             <div className='absolute top-[-14px] right-[-14px] flex flex-row justify-end gap-1'>
               {!feedbackDisabled && !item.feedbackDisabled && renderItemOperation()}

app/components/chat/loading-anim/index.tsx

+'use client'
+import React, { FC } from 'react'
+import s from './style.module.css'
+
+export interface ILoaidingAnimProps {
+  type: 'text' | 'avatar'
+}
+
+const LoaidingAnim: FC<ILoaidingAnimProps> = ({
+  type
+}) => {
+  return (
+    <div className={`${s['dot-flashing']} ${s[type]}`}></div>
+  )
+}
+export default React.memo(LoaidingAnim)

app/components/chat/loading-anim/style.module.css

+.dot-flashing {
+  position: relative;
+  animation: 1s infinite linear alternate;
+  animation-delay: 0.5s;
+}
+
+.dot-flashing::before,
+.dot-flashing::after {
+  content: "";
+  display: inline-block;
+  position: absolute;
+  top: 0;
+  animation: 1s infinite linear alternate;
+}
+
+.dot-flashing::before {
+  animation-delay: 0s;
+}
+
+.dot-flashing::after {
+  animation-delay: 1s;
+}
+
+@keyframes dot-flashing {
+  0% {
+    background-color: #667085;
+  }
+
+  50%,
+  100% {
+    background-color: rgba(102, 112, 133, 0.3);
+  }
+}
+
+@keyframes dot-flashing-avatar {
+  0% {
+    background-color: #155EEF;
+  }
+
+  50%,
+  100% {
+    background-color: rgba(21, 94, 239, 0.3);
+  }
+}
+
+.text,
+.text::before,
+.text::after {
+  width: 4px;
+  height: 4px;
+  border-radius: 50%;
+  background-color: #667085;
+  color: #667085;
+  animation-name: dot-flashing;
+}
+
+.text::before {
+  left: -7px;
+}
+
+.text::after {
+  left: 7px;
+}
+
+.avatar,
+.avatar::before,
+.avatar::after {
+  width: 2px;
+  height: 2px;
+  border-radius: 50%;
+  background-color: #155EEF;
+  color: #155EEF;
+  animation-name: dot-flashing-avatar;
+}
+
+.avatar::before {
+  left: -5px;
+}
+
+.avatar::after {
+  left: 5px;
+}
\ No newline at end of file

app/components/chat/style.module.css

 .answerIcon {
+  position: relative;
   background: url(./icons/robot.svg);
 }
 
 .typeingIcon {
-  position: relative;
-}
-
-.typeingIcon::after {
-  content: '';
   position: absolute;
-  top: -3px;
-  left: -3px;
+  top: 0px;
+  left: 0px;
+  display: flex;
+  justify-content: center;
+  align-items: center;
   width: 16px;
   height: 16px;
-  background: url(./icons/typing.svg) no-repeat;
-  background-size: contain;
+  background: #FFFFFF;
+  box-shadow: 0px 1px 2px rgba(16, 24, 40, 0.05);
+  border-radius: 16px;
 }
 
+
 .questionIcon {
   background: url(./icons/default-avatar.jpg);
   background-size: contain;

app/components/index.tsx

@@ -282,7 +282,7 @@ const Main: FC = () => {
     const placeholderAnswerId = `answer-placeholder-${Date.now()}`
     const placeholderAnswerItem = {
       id: placeholderAnswerId,
-      content: '...',
+      content: '',
       isAnswer: true,
     }