fix: revert 100vh 修改

feat: add floating new message indicator

frontend_nuxt/pages/message-box/[id].vue

@@ -36,7 +36,11 @@
               </div>
             </div>
             <div v-if="item.replyTo" class="reply-preview info-content-text">
-              <div class="reply-author">{{ item.replyTo.sender.username }}</div>
+              <div class="reply-header">
+                <next class="reply-icon" />
+                <BaseImage class="reply-avatar" :src="item.replyTo.sender.avatar" alt="avatar" />
+                <div class="reply-author">{{ item.replyTo.sender.username }}:</div>
+              </div>
               <div class="reply-content" v-html="renderMarkdown(item.replyTo.content)"></div>
             </div>
             <div class="message-content">
@@ -63,11 +67,21 @@
     </div>
 
     <div class="message-input-area">
+      <div
+        v-if="newMessagesCount > 0 && !isUserNearBottom"
+        class="new-message-container"
+        @click="handleScrollToBottom"
+      >
+        <double-down />
+        <div class="new-message-count">有{{ newMessagesCount }}条新消息</div>
+      </div>
+
       <div v-if="replyTo" class="active-reply">
         正在回复 {{ replyTo.sender.username }}:
         {{ stripMarkdownLength(replyTo.content, 50) }}
         <close-icon class="close-reply" @click="replyTo = null" />
       </div>
+
       <MessageEditor :loading="sending" @submit="sendMessage" />
     </div>
   </div>
@@ -120,6 +134,7 @@ const isChannel = ref(false)
 const isFloatMode = computed(() => route.query.float !== undefined)
 const floatRoute = useState('messageFloatRoute')
 const replyTo = ref(null)
+const newMessagesCount = ref(0)
 
 const isUserNearBottom = ref(true)
 function updateNearBottom() {
@@ -127,6 +142,9 @@ function updateNearBottom() {
   if (!el) return
   const threshold = 40 // px
   isUserNearBottom.value = el.scrollHeight - el.scrollTop - el.clientHeight <= threshold
+  if (isUserNearBottom.value) {
+    newMessagesCount.value = 0
+  }
 }
 
 const hasMoreMessages = computed(() => currentPage.value < totalPages.value - 1)
@@ -170,6 +188,11 @@ function scrollToBottomInstant() {
   el.scrollTop = el.scrollHeight
 }
 
+function handleScrollToBottom() {
+  scrollToBottomSmooth()
+  newMessagesCount.value = 0
+}
+
 async function fetchMessages(page = 0) {
   if (page === 0) {
     loading.value = true
@@ -301,6 +324,7 @@ async function sendMessage(content, clearInput) {
     await nextTick()
     // 仅“发送消息成功后”才平滑滚动到底部
     scrollToBottomSmooth()
+    newMessagesCount.value = 0
   } catch (e) {
     toast.error(e.message)
   } finally {
@@ -373,6 +397,8 @@ const subscribeToConversation = () => {
 
       if (isUserNearBottom.value) {
         scrollToBottomSmooth()
+      } else {
+        newMessagesCount.value += 1
       }
     } catch (e) {
       console.error('Failed to parse websocket message', e)
@@ -555,6 +581,25 @@ function goBack() {
   gap: 10px;
 }
 
+.new-message-container {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  gap: 5px;
+  cursor: pointer;
+  border: 1px solid var(--normal-border-color);
+  border-radius: 20px;
+  padding: 3px 6px;
+  box-shadow: 0 0 10px 0 rgba(0, 0, 0, 0.1);
+  width: fit-content;
+  position: absolute;
+  bottom: calc(100% + 20px);
+  left: 50%;
+  transform: translateX(-50%);
+  z-index: 10;
+  background-color: var(--background-color);
+}
+
 .user-name {
   font-size: 14px;
   font-weight: 600;
@@ -585,11 +630,6 @@ function goBack() {
   border-bottom-left-radius: 4px;
 }
 
-.message-input-area {
-  margin-left: 20px;
-  margin-right: 20px;
-}
-
 .loading-container {
   display: flex;
   justify-content: center;
@@ -606,6 +646,19 @@ function goBack() {
 .message-input-area {
   margin-left: 10px;
   margin-right: 10px;
+  position: relative;
+}
+
+.reply-icon {
+  color: var(--primary-color);
+  margin-right: 5px;
+}
+
+.reply-avatar {
+  width: 20px;
+  height: 20px;
+  border-radius: 50%;
+  margin-right: 5px;
 }
 
 .reply-preview {
@@ -617,9 +670,16 @@ function goBack() {
   background-color: var(--normal-light-background-color);
 }
 
+.reply-header {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+}
+
 .reply-author {
   font-weight: bold;
   margin-bottom: 2px;
+  opacity: 0.5;
 }
 
 .reply-btn {

frontend_nuxt/plugins/iconpark.client.ts

@@ -73,6 +73,7 @@ import {
   RobotOne,
   Server,
   Protection,
+  DoubleDown,
 } from '@icon-park/vue-next'
 
 export default defineNuxtPlugin((nuxtApp) => {
@@ -149,4 +150,5 @@ export default defineNuxtPlugin((nuxtApp) => {
   nuxtApp.vueApp.component('RobotOne', RobotOne)
   nuxtApp.vueApp.component('ServerIcon', Server)
   nuxtApp.vueApp.component('Protection', Protection)
+  nuxtApp.vueApp.component('DoubleDown', DoubleDown)
 })