From 98fbc4602105d4e42d65944a131a7d608458cc88 Mon Sep 17 00:00:00 2001
From: ROOG <guxinpei@qq.com>
Date: Sun, 14 Dec 2025 21:58:32 +0800
Subject: [PATCH] =?UTF-8?q?main:=20=E6=94=B9=E8=BF=9B=20ChatView=20?=
 =?UTF-8?q?=E9=A1=B5=E9=9D=A2=E5=8A=9F=E8=83=BD=E5=B9=B6=E4=BC=98=E5=8C=96?=
 =?UTF-8?q?=E7=94=A8=E6=88=B7=E4=BD=93=E9=AA=8C?=
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- 重构会话详情加载逻辑，移除 mock 数据，改为动态获取
- 新增归档操作及其后端接口接入
- 增加 SSE 支持，实现消息实时更新
- 优化消息发送流程，添加错误提示和状态管理
- 改善界面样式，调整消息气泡布局与滚动交互
- 增加骨架屏和空状态提示，提升加载体验
---
 src/views/ChatView.vue | 730 +++++++++++++++++++++++++++++++----------
 1 file changed, 559 insertions(+), 171 deletions(-)

diff --git a/src/views/ChatView.vue b/src/views/ChatView.vue
index d4c162a..71c6f79 100644
--- a/src/views/ChatView.vue
+++ b/src/views/ChatView.vue
@@ -1,112 +1,112 @@
 <script setup>
-import { computed, reactive, ref, watch } from 'vue'
-import { useRoute } from 'vue-router'
+import {
+  computed,
+  reactive,
+  ref,
+  watch,
+  nextTick,
+  onMounted,
+  onBeforeUnmount,
+} from 'vue'
+import { useRoute, useRouter } from 'vue-router'
 import { ElMessage } from 'element-plus'
+import axios from 'axios'
 
 const route = useRoute()
-const inputText = ref('我们继续讨论：请总结当前进展，并生成可执行的下一步。')
+const router = useRouter()
+const apiBase = import.meta.env.VITE_API_BASE || 'http://localhost:8000/api'
+const inputText = ref('')
 const uploadFiles = ref([])
 const fileList = ref([])
+const sending = ref(false)
+const loadingMessages = ref(false)
+const errorMessage = ref('')
+const showJumpDown = ref(false)
+const lastSeq = ref(0)
+const eventSource = ref(null)
+const sseRetryTimer = ref(null)
+const archiveLoading = ref(false)
 const sampleImage =
   'data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="220" height="140" viewBox="0 0 220 140"><defs><linearGradient id="g" x1="0%" y1="0%" x2="100%" y2="100%"><stop stop-color="%23e0e9ff" offset="0%"/><stop stop-color="%23c7d8ff" offset="50%"/><stop stop-color="%23e8f1ff" offset="100%"/></linearGradient></defs><rect width="220" height="140" rx="12" fill="url(%23g)"/><text x="50%" y="52%" dominant-baseline="middle" text-anchor="middle" fill="%231d4ed8" font-family="Arial" font-size="16">mock image</text></svg>'
 
-const mockSessions = reactive({
-  s1: {
-    summary: {
-      title: '智能客服体验调优',
-      status: 'OPEN',
-      updatedAt: '2025-02-14 10:26',
-      lastSeq: 18,
-      tags: ['产品设计', 'LLM', '多模态'],
-    },
-    messages: [
-      {
-        id: 'm1',
-        role: 'user',
-        author: '你',
-        time: '10:05',
-        text: '我们需要让欢迎页更有 CRT 科幻感，同时保持 Apple 风格的简洁。',
-        attachments: [
-          { name: 'welcome-draft.pdf', type: 'file', size: '320KB' },
-        ],
-      },
-      {
-        id: 'm2',
-        role: 'agent',
-        author: 'ARS',
-        time: '10:08',
-        text: '已收到。建议：1) 使用玻璃拟态背景；2) 增加呼吸动画；3) 采用柔和蓝绿渐变。',
-        attachments: [],
-      },
-      {
-        id: 'm3',
-        role: 'user',
-        author: '你',
-        time: '10:12',
-        text: '这里有一张示意图，请参考。并补充一个简短的按钮文案。',
-        attachments: [
-          {
-            name: 'wireframe.png',
-            type: 'image',
-            size: '640KB',
-            url: sampleImage,
-          },
-        ],
-      },
-      {
-        id: 'm4',
-        role: 'agent',
-        author: 'ARS',
-        time: '10:15',
-        text: '好的，按钮文案可以用 “开始体验”。并将插画置于右侧，保留留白。',
-        attachments: [],
-      },
-    ],
-  },
-  s2: {
-    summary: {
-      title: '用户反馈整理',
-      status: 'LOCKED',
-      updatedAt: '2025-02-13 17:20',
-      lastSeq: 9,
-      tags: ['反馈', '数据整理'],
-    },
-    messages: [
-      {
-        id: 'm1',
-        role: 'user',
-        author: '你',
-        time: '17:00',
-        text: '请汇总最近 30 条用户反馈，并标记优先级。',
-        attachments: [{ name: 'feedback.csv', type: 'file', size: '80KB' }],
-      },
-      {
-        id: 'm2',
-        role: 'agent',
-        author: 'ARS',
-        time: '17:12',
-        text: '已完成：共 30 条，高优先级 6 条，中 12 条，低 12 条，已按主题聚合。',
-        attachments: [],
-      },
-    ],
-  },
-})
-
-const sessionId = computed(() => (route.params.id ? String(route.params.id) : 's1'))
-const sessionData = ref(mockSessions[sessionId.value] || mockSessions.s1)
-
-const applySession = () => {
-  sessionData.value = mockSessions[sessionId.value] || mockSessions.s1
-}
-
-watch(
-  () => route.params.id,
-  () => applySession(),
-  { immediate: true }
+const sessionId = ref(
+  route.params.id
+    ? String(route.params.id)
+    : localStorage.getItem('ars-current-session') || ''
 )
 
-const summary = computed(() => sessionData.value?.summary || {})
-const messages = computed(() => sessionData.value?.messages || [])
+const summary = reactive({
+  title: '未命名会话',
+  status: 'OPEN',
+  updatedAt: '--',
+  lastSeq: '--',
+  tags: [],
+})
+
+const messagesState = ref([])
+const normalizeTime = (val) =>
+  val
+    ? new Date(val).toLocaleTimeString('zh-CN', {
+        hour12: false,
+        hour: '2-digit',
+        minute: '2-digit',
+      })
+    : '--:--'
+
+const normalizeMessage = (msg = {}) => {
+  const seq = msg.seq ?? lastSeq.value ?? 0
+  return {
+    id: msg.message_id || `msg-${seq || Math.random()}`,
+    seq,
+    role: msg.role?.toLowerCase() === 'user' ? 'user' : 'agent',
+    author: msg.role?.toUpperCase() === 'USER' ? '你' : 'ARS',
+    time: normalizeTime(msg.created_at),
+    text: msg.content || '（空内容）',
+    attachments:
+      msg.payload?.attachments?.map((file) => ({
+        name: file.name || '附件',
+        type: file.type || 'file',
+        size: file.size || '',
+        url: file.url || sampleImage,
+      })) || [],
+  }
+}
+
+const upsertMessage = (msg) => {
+  const list = messagesState.value
+  const idx = list.findIndex(
+    (m) => m.id === msg.id || (msg.seq && m.seq === msg.seq)
+  )
+  if (idx >= 0) {
+    const next = [...list]
+    next[idx] = msg
+    messagesState.value = next
+  } else {
+    messagesState.value = [...list, msg]
+  }
+  lastSeq.value = Math.max(lastSeq.value || 0, msg.seq || 0)
+  summary.lastSeq = lastSeq.value
+  summary.updatedAt =
+    msg.time ||
+    summary.updatedAt ||
+    new Date().toLocaleString('zh-CN', {
+      hour12: false,
+      month: '2-digit',
+      day: '2-digit',
+      hour: '2-digit',
+      minute: '2-digit',
+    })
+}
+
+const normalizedSummary = (data = {}) => ({
+  title: data.session_name || '未命名会话',
+  status: data.status || 'OPEN',
+  updatedAt: data.updated_at?.slice(0, 16) || '--',
+  lastSeq: data.last_seq ?? '--',
+  tags: data.last_message_type ? [data.last_message_type] : [],
+})
+
+const messages = computed(() => messagesState.value || [])
 
 const handleFileChange = (uploadFile, uploadFilesList) => {
   fileList.value = uploadFilesList
@@ -143,8 +143,303 @@ const handleFileRemove = (file, list) => {
 }
 
 const handleSend = () => {
-  ElMessage.info('仅做 UI 演示，尚未接入发送接口')
+  if (sending.value) return
+  if (summary.status === 'CLOSED') {
+    ElMessage.warning('会话已归档，无法发送')
+    return
+  }
+  if (!sessionId.value) {
+    ElMessage.warning('请先在左侧选择或新建会话')
+    return
+  }
+  const token = localStorage.getItem('ars-token') || ''
+  if (!token) {
+    ElMessage.warning('请先登录')
+    router.replace({ name: 'login' })
+    return
+  }
+  if (!inputText.value.trim() && !uploadFiles.value.length) {
+    ElMessage.warning('请输入内容或选择附件')
+    return
+  }
+
+  const payload =
+    uploadFiles.value.length > 0
+      ? {
+          attachments: uploadFiles.value.map((f) => ({
+            name: f.name,
+            type: f.type,
+            size: f.size,
+            url: f.url,
+          })),
+        }
+      : null
+
+  const body = {
+    role: 'USER',
+    type: 'user.prompt',
+    content: inputText.value.trim(),
+    payload,
+    dedupe_key: `ui-${Date.now()}`,
+  }
+
+  sending.value = true
+  axios
+    .post(`${apiBase}/sessions/${sessionId.value}/messages`, body, {
+      headers: { Authorization: `Bearer ${token}` },
+    })
+    .then((resp) => {
+      const data = resp.data?.data || resp.data || {}
+      const now = new Date()
+      const nextMsg = normalizeMessage({
+        ...data,
+        role: 'USER',
+        content: inputText.value.trim(),
+        payload:
+          uploadFiles.value.length > 0
+            ? { attachments: uploadFiles.value }
+            : null,
+        created_at:
+          data.created_at ||
+          now.toISOString().slice(0, 19).replace('T', ' '),
+      })
+      upsertMessage(nextMsg)
+      inputText.value = ''
+      uploadFiles.value = []
+      fileList.value = []
+      nextTick(() => scrollToBottom())
+      ElMessage.success('已发送')
+    })
+    .catch((err) => {
+      const message =
+        err.response?.data?.message ||
+        err.message ||
+        '发送失败，请稍后再试'
+      ElMessage.error(message)
+      if (err.response?.status === 401) router.replace({ name: 'login' })
+    })
+    .finally(() => {
+      sending.value = false
+    })
 }
+
+const handleArchive = async () => {
+  if (!sessionId.value) return
+  const token = localStorage.getItem('ars-token') || ''
+  if (!token) {
+    router.replace({ name: 'login' })
+    return
+  }
+  archiveLoading.value = true
+  try {
+    const { data } = await axios.post(
+      `${apiBase}/sessions/${sessionId.value}/archive`,
+      {},
+      { headers: { Authorization: `Bearer ${token}` } }
+    )
+    const info = data.data || data
+    Object.assign(summary, normalizedSummary(info))
+    lastSeq.value = info.last_seq || lastSeq.value
+    ElMessage.success('会话已归档')
+  } catch (err) {
+    const message =
+      err.response?.data?.message || '归档失败，请稍后再试'
+    ElMessage.error(message)
+    if (err.response?.status === 401) router.replace({ name: 'login' })
+  } finally {
+    archiveLoading.value = false
+  }
+}
+
+const fetchSummary = async () => {
+  const token = localStorage.getItem('ars-token') || ''
+  if (!token) {
+    router.replace({ name: 'login' })
+    return
+  }
+  if (!sessionId.value) return
+  try {
+    const { data } = await axios.get(`${apiBase}/sessions/${sessionId.value}`, {
+      headers: { Authorization: `Bearer ${token}` },
+    })
+    const info = data.data || data
+    Object.assign(summary, normalizedSummary(info))
+    if (info.last_seq) {
+      lastSeq.value = info.last_seq
+    }
+  } catch (err) {
+    // 后端可能不支持单条查询，容忍 404
+    if (err.response?.status === 401) router.replace({ name: 'login' })
+  }
+}
+
+const fetchMessages = async () => {
+  const token = localStorage.getItem('ars-token') || ''
+  if (!token) {
+    router.replace({ name: 'login' })
+    return
+  }
+  if (!sessionId.value) return
+  loadingMessages.value = true
+  errorMessage.value = ''
+  try {
+    const { data } = await axios.get(
+      `${apiBase}/sessions/${sessionId.value}/messages`,
+      {
+        params: { after_seq: 0, limit: 200 },
+        headers: { Authorization: `Bearer ${token}` },
+      }
+    )
+    const list = data.data || []
+    messagesState.value = list.map((msg) => normalizeMessage(msg))
+    if (list.length) {
+      const last = list[list.length - 1]
+      lastSeq.value = last.seq || 0
+      Object.assign(summary, {
+        title: summary.title || '未命名会话',
+        status: last.status || summary.status,
+        lastSeq: last.seq ?? summary.lastSeq,
+        updatedAt:
+          last.created_at?.slice(0, 16) ||
+          summary.updatedAt ||
+          new Date().toLocaleString('zh-CN', {
+            hour12: false,
+            month: '2-digit',
+            day: '2-digit',
+            hour: '2-digit',
+            minute: '2-digit',
+          }),
+      })
+    }
+  } catch (err) {
+    const message =
+      err.response?.data?.message || '获取消息失败，请稍后再试'
+    errorMessage.value = message
+    ElMessage.error(message)
+    if (err.response?.status === 401) router.replace({ name: 'login' })
+  } finally {
+    loadingMessages.value = false
+  }
+}
+
+const fetchSingleMessage = async (messageId) => {
+  const token = localStorage.getItem('ars-token') || ''
+  if (!token || !sessionId.value || !messageId) return
+  try {
+    const { data } = await axios.get(
+      `${apiBase}/sessions/${sessionId.value}/messages/${messageId}`,
+      { headers: { Authorization: `Bearer ${token}` } }
+    )
+    const detail = data.data || data
+    const normalized = normalizeMessage(detail)
+    upsertMessage(normalized)
+  } catch (err) {
+    if (err.response?.status === 401) router.replace({ name: 'login' })
+  }
+}
+
+const scrollToBottom = () => {
+  window.scrollTo({
+    top:
+      document.documentElement.scrollHeight ||
+      document.body.scrollHeight ||
+      0,
+    behavior: 'smooth',
+  })
+}
+
+const handleWindowScroll = () => {
+  const doc = document.documentElement
+  const top = window.scrollY || doc.scrollTop || 0
+  const distance = doc.scrollHeight - top - window.innerHeight
+  showJumpDown.value = distance > 160
+}
+
+const stopSse = () => {
+  if (sseRetryTimer.value) {
+    clearTimeout(sseRetryTimer.value)
+    sseRetryTimer.value = null
+  }
+  if (eventSource.value) {
+    eventSource.value.close()
+    eventSource.value = null
+  }
+}
+
+const startSse = () => {
+  if (typeof window === 'undefined' || typeof EventSource === 'undefined')
+    return
+  if (!sessionId.value) return
+  const token = localStorage.getItem('ars-token') || ''
+  if (!token) {
+    router.replace({ name: 'login' })
+    return
+  }
+
+  stopSse()
+  const url = new URL(`${apiBase}/sessions/${sessionId.value}/sse`)
+  url.searchParams.set('after_seq', lastSeq.value || 0)
+  url.searchParams.set('limit', 200)
+  url.searchParams.set('token', token)
+
+  const es = new EventSource(url.toString())
+  es.onmessage = (event) => {
+    try {
+      const data = JSON.parse(event.data || '{}')
+      if (!data) return
+      if (!data.content && data.message_id) {
+        fetchSingleMessage(data.message_id)
+        return
+      }
+      const normalized = normalizeMessage(data)
+      upsertMessage(normalized)
+      nextTick(() => scrollToBottom())
+    } catch (e) {
+      // ignore parse error
+    }
+  }
+  es.onerror = () => {
+    stopSse()
+    sseRetryTimer.value = window.setTimeout(() => startSse(), 3000)
+  }
+  eventSource.value = es
+}
+
+const applySession = () => {
+  if (!sessionId.value) return
+  stopSse()
+  lastSeq.value = 0
+  localStorage.setItem('ars-current-session', sessionId.value)
+  fetchSummary()
+  fetchMessages().then(() => {
+    nextTick(() => {
+      scrollToBottom()
+      startSse()
+    })
+  })
+}
+
+watch(
+  () => route.params.id,
+  (val) => {
+    sessionId.value =
+      val !== undefined
+        ? String(val)
+        : localStorage.getItem('ars-current-session') || ''
+    applySession()
+  },
+  { immediate: true }
+)
+
+onMounted(() => {
+  window.addEventListener('scroll', handleWindowScroll, { passive: true })
+  nextTick(() => handleWindowScroll())
+})
+
+onBeforeUnmount(() => {
+  window.removeEventListener('scroll', handleWindowScroll)
+  stopSse()
+})
 </script>
 
 <template>
@@ -179,68 +474,125 @@ const handleSend = () => {
           <p class="stat-label">草稿字数</p>
           <p class="stat-value">{{ inputText.length }}</p>
         </div>
+        <el-button
+          size="small"
+          :loading="archiveLoading"
+          :disabled="summary.status === 'CLOSED'"
+          @click="handleArchive"
+        >
+          {{ summary.status === 'CLOSED' ? '已归档' : '归档会话' }}
+        </el-button>
       </div>
     </section>
 
     <section class="chat-window">
       <div class="history">
-        <div
-          v-for="msg in messages"
-          :key="msg.id"
-          class="bubble"
-          :class="msg.role === 'user' ? 'bubble-user' : 'bubble-agent'"
-        >
-          <div class="bubble-head">
-            <span class="author">{{ msg.author }}</span>
-            <span class="time">{{ msg.time }}</span>
-          </div>
-          <p class="bubble-text">{{ msg.text }}</p>
-          <div v-if="msg.attachments?.length" class="attachment-list">
-            <div
-              v-for="file in msg.attachments"
-              :key="file.name"
-              class="attachment"
-              :class="file.type"
-            >
+        <el-skeleton v-if="loadingMessages" animated :rows="4" class="skeleton" />
+        <el-alert
+          v-else-if="errorMessage"
+          :title="errorMessage"
+          type="error"
+          show-icon
+          :closable="false"
+          class="history-error"
+        />
+        <el-empty
+          v-else-if="!messages.length"
+          description="暂无消息"
+          :image-size="100"
+        />
+        <template v-else>
+          <div
+            v-for="msg in messages"
+            :key="msg.id"
+            class="bubble"
+            :class="msg.role === 'user' ? 'bubble-user' : 'bubble-agent'"
+          >
+            <div class="bubble-head">
+              <span class="author">{{ msg.author }}</span>
+              <span class="time">{{ msg.time }}</span>
+              <el-tag
+                v-if="msg.role === 'agent'"
+                size="small"
+                type="info"
+                effect="plain"
+              >
+                ARS 回复
+              </el-tag>
+              <el-tag
+                v-else
+                size="small"
+                type="primary"
+                effect="plain"
+              >
+                提示词
+              </el-tag>
+            </div>
+            <p class="bubble-text">{{ msg.text }}</p>
+            <div v-if="msg.attachments?.length" class="attachment-list">
               <div
-                v-if="file.type === 'image'"
-                class="attachment-thumb"
-                :style="{ backgroundImage: file.url ? `url(${file.url})` : undefined }"
-              />
-              <div class="attachment-meta">
-                <span class="name">{{ file.name }}</span>
-                <span class="size">{{ file.size || '图像' }}</span>
+                v-for="file in msg.attachments"
+                :key="file.name"
+                class="attachment"
+                :class="file.type"
+              >
+                <div
+                  v-if="file.type === 'image'"
+                  class="attachment-thumb"
+                  :style="{ backgroundImage: file.url ? `url(${file.url})` : undefined }"
+                />
+                <div class="attachment-meta">
+                  <span class="name">{{ file.name }}</span>
+                  <span class="size">{{ file.size || '图像' }}</span>
+                </div>
               </div>
             </div>
           </div>
-        </div>
+        </template>
       </div>
 
-      <div class="composer">
-        <el-upload
-          class="upload"
-          multiple
-          accept="image/*,.pdf,.txt,.doc,.docx,.md"
-          :auto-upload="false"
-          :show-file-list="false"
-          :file-list="fileList"
-          :on-change="handleFileChange"
-          :on-remove="handleFileRemove"
+      <div class="composer-dock">
+        <button
+          v-if="showJumpDown"
+          type="button"
+          class="jump-down"
+          @click="scrollToBottom"
         >
-          <button type="button" class="add-btn" aria-label="上传文件">
-            +
-          </button>
-        </el-upload>
-        <el-input
-          v-model="inputText"
-          type="textarea"
-          :autosize="{ minRows: 2, maxRows: 6 }"
-          class="composer-input"
-          placeholder="输入消息，支持粘贴大段文本与附件..."
-        />
-        <el-button color="#1d4ed8" class="send-btn" @click="handleSend">
-          发送
-        </el-button>
+          ↓ 回到底部
+        </button>
+        <div class="composer">
+          <el-upload
+            class="upload"
+            multiple
+            accept="image/*,.pdf,.txt,.doc,.docx,.md"
+            :auto-upload="false"
+            :show-file-list="false"
+            :file-list="fileList"
+            :on-change="handleFileChange"
+            :on-remove="handleFileRemove"
+          >
+            <button type="button" class="add-btn" aria-label="上传文件">
+              +
+            </button>
+          </el-upload>
+          <el-input
+            v-model="inputText"
+            type="textarea"
+            :autosize="{ minRows: 3, maxRows: 8 }"
+            class="composer-input"
+            :placeholder="summary.status === 'CLOSED' ? '会话已归档，无法继续发送' : '输入消息，支持粘贴大段文本与附件...'"
+            :disabled="summary.status === 'CLOSED'"
+          />
+          <el-button
+            color="#1d4ed8"
+            class="send-btn"
+            :loading="sending"
+            :disabled="summary.status === 'CLOSED'"
+            @click="handleSend"
+          >
+            发送
+          </el-button>
+        </div>
       </div>
 
       <div v-if="uploadFiles.length" class="pending-attachments">
@@ -373,52 +725,82 @@ const handleSend = () => {
   background: rgba(255, 255, 255, 0.9);
   border: 1px solid rgba(0, 0, 0, 0.04);
   box-shadow: 0 18px 32px rgba(17, 24, 39, 0.08);
+  align-items: center;
 }
 
 .history {
   display: flex;
   flex-direction: column;
   gap: 12px;
-  max-height: 48vh;
-  overflow: auto;
-  padding-right: 8px;
-  scrollbar-width: thin;
-  scrollbar-color: rgba(37, 99, 235, 0.25) rgba(255, 255, 255, 0.8);
+  width: min(980px, 100%);
+  padding: 0 12px;
+  margin: 0 auto;
 }
 
-.history::-webkit-scrollbar {
-  width: 8px;
+.skeleton {
+  padding: 12px 8px;
 }
 
-.history::-webkit-scrollbar-thumb {
-  background: rgba(37, 99, 235, 0.3);
-  border-radius: 10px;
+.history-error {
+  margin-bottom: 8px;
+}
+
+.composer-dock {
+  position: sticky;
+  bottom: 0;
+  width: 100%;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 0;
+  background: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.8));
+}
+
+.jump-down {
+  border: 1px solid rgba(37, 99, 235, 0.2);
+  background: rgba(255, 255, 255, 0.92);
+  color: #1d4ed8;
+  border-radius: 999px;
+  padding: 6px 12px;
+  box-shadow: 0 10px 20px rgba(17, 24, 39, 0.08);
+  cursor: pointer;
+  transition: transform 0.12s ease, box-shadow 0.12s ease;
+}
+
+.jump-down:hover {
+  transform: translateY(-1px);
+  box-shadow: 0 14px 28px rgba(17, 24, 39, 0.12);
 }
 
 .bubble {
-  padding: 12px 14px;
-  border-radius: 14px;
+  padding: 14px 16px;
+  border-radius: 16px;
   border: 1px solid rgba(0, 0, 0, 0.05);
-  max-width: 760px;
+  max-width: 820px;
   box-shadow: 0 10px 20px rgba(17, 24, 39, 0.06);
+  width: calc(100% - 48px);
+  align-self: center;
+  background: #ffffff;
+  word-break: break-word;
+  white-space: pre-wrap;
+  position: relative;
 }
 
 .bubble-user {
-  align-self: flex-end;
-  background: linear-gradient(135deg, #e7f0ff, #dfe9ff);
   border-color: rgba(37, 99, 235, 0.18);
+  background: linear-gradient(135deg, #edf2ff, #e5edff);
 }
 
 .bubble-agent {
-  align-self: flex-start;
-  background: #ffffff;
+  border-color: rgba(0, 0, 0, 0.04);
 }
 
 .bubble-head {
   display: flex;
   align-items: center;
-  gap: 8px;
-  margin-bottom: 4px;
+  gap: 10px;
+  margin-bottom: 6px;
 }
 
 .author {
@@ -432,9 +814,10 @@ const handleSend = () => {
 }
 
 .bubble-text {
-  margin: 0 0 6px;
+  margin: 0 0 8px;
   color: #111827;
-  line-height: 1.6;
+  line-height: 1.7;
+  font-size: 15px;
 }
 
 .attachment-list {
@@ -451,6 +834,7 @@ const handleSend = () => {
   padding: 8px 10px;
   border-radius: 10px;
   background: rgba(15, 23, 42, 0.03);
+  word-break: break-word;
 }
 
 .attachment.file {
@@ -484,10 +868,12 @@ const handleSend = () => {
   grid-template-columns: auto 1fr auto;
   gap: 10px;
   align-items: flex-start;
-  padding: 12px;
+  padding: 14px;
   border-radius: 14px;
   background: #f7f9fc;
   border: 1px solid rgba(0, 0, 0, 0.04);
+  width: min(980px, 100%);
+  box-shadow: 0 12px 30px rgba(17, 24, 39, 0.12);
 }
 
 .add-btn {
@@ -513,6 +899,7 @@ const handleSend = () => {
   border-radius: 12px;
   border: 1px solid rgba(0, 0, 0, 0.06);
   box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
+  min-height: 110px;
 }
 
 .send-btn {
@@ -592,6 +979,7 @@ const handleSend = () => {
 
   .composer {
     grid-template-columns: 1fr;
+    width: 100%;
   }
 
   .add-btn {