更新

.gitignore

@@ -0,0 +1,2 @@
+logs/stability/
+logs/conversation/

frontend-admin/src/views/ModelsView.vue

@@ -159,6 +159,18 @@
                 <input v-model="form.seed_node" class="form-input" placeholder="自动识别，如 30:3" />
               </div>
             </div>
+            <div class="form-row-2">
+              <div class="form-group">
+                <label>img2img 重绘强度</label>
+                <input v-model.number="form.img2img_denoise" type="number" min="0.01" max="1" step="0.01" class="form-input" />
+                <p class="field-hint">默认 0.45；越低越保留原图，越高变化越明显。</p>
+              </div>
+              <div class="form-group">
+                <label>inpaint 重绘强度</label>
+                <input v-model.number="form.inpaint_denoise" type="number" min="0.01" max="1" step="0.01" class="form-input" />
+                <p class="field-hint">默认 0.72；仅作用于白色遮罩区域。</p>
+              </div>
+            </div>
             <p class="field-hint">
               必须使用 <code>Save (API Format)</code> 导出的 JSON（节点含 class_type）。
               UI Format（含 nodes/links）导入后会秒结束且不出图。
@@ -310,6 +322,8 @@ const form = reactive({
   workflow_json: '',
   prompt_node: '',
   seed_node: '',
+  img2img_denoise: 0.45,
+  inpaint_denoise: 0.72,
   refine_prompt: true,
   system_prompt: ''
 })
@@ -385,14 +399,16 @@ function onProviderChange() {
 }
 
 function parseExtraConfig(extra) {
-  if (!extra) return { workflow_json: '', prompt_node: '', seed_node: '', refine_prompt: true, system_prompt: '' }
+  if (!extra) return { workflow_json: '', prompt_node: '', seed_node: '', img2img_denoise: 0.45, inpaint_denoise: 0.72, refine_prompt: true, system_prompt: '' }
   if (typeof extra === 'string') {
-    try { extra = JSON.parse(extra) } catch { return { workflow_json: '', prompt_node: '', seed_node: '', refine_prompt: true, system_prompt: '' } }
+    try { extra = JSON.parse(extra) } catch { return { workflow_json: '', prompt_node: '', seed_node: '', img2img_denoise: 0.45, inpaint_denoise: 0.72, refine_prompt: true, system_prompt: '' } }
   }
   return {
     workflow_json: extra.workflow ? JSON.stringify(extra.workflow, null, 2) : '',
     prompt_node: extra.prompt_node || '',
     seed_node: extra.seed_node || '',
+    img2img_denoise: Number(extra.img2img_denoise ?? 0.45),
+    inpaint_denoise: Number(extra.inpaint_denoise ?? 0.72),
     refine_prompt: extra.refine_prompt === undefined ? true : !!extra.refine_prompt,
     system_prompt: extra.system_prompt || ''
   }
@@ -437,6 +453,8 @@ function buildExtraConfig() {
   }
   if ((form.prompt_node || '').trim()) config.prompt_node = form.prompt_node.trim()
   if ((form.seed_node || '').trim()) config.seed_node = form.seed_node.trim()
+  config.img2img_denoise = Math.max(0.01, Math.min(1, Number(form.img2img_denoise) || 0.45))
+  config.inpaint_denoise = Math.max(0.01, Math.min(1, Number(form.inpaint_denoise) || 0.72))
   if ((form.system_prompt || '').trim()) config.system_prompt = form.system_prompt.trim()
   config.refine_prompt = !!form.refine_prompt
   return config
@@ -485,7 +503,7 @@ function openCreate() {
     name: '', provider: 'openai', model_id: '', api_base_url: 'https://api.openai.com/v1',
     api_key: '', max_tokens: 4096, temperature: 0.7, is_default: false, enabled: true, support_context: true, support_image: true,
     frequency_penalty: 0, presence_penalty: 0,
-    workflow_json: '', prompt_node: '', seed_node: '', refine_prompt: true, system_prompt: ''
+    workflow_json: '', prompt_node: '', seed_node: '', img2img_denoise: 0.45, inpaint_denoise: 0.72, refine_prompt: true, system_prompt: ''
   })
   showModal.value = true
 }
@@ -510,6 +528,8 @@ function openEdit(m) {
     workflow_json: extra.workflow_json,
     prompt_node: extra.prompt_node,
     seed_node: extra.seed_node,
+    img2img_denoise: extra.img2img_denoise,
+    inpaint_denoise: extra.inpaint_denoise,
     refine_prompt: extra.refine_prompt,
     system_prompt: extra.system_prompt
   })
@@ -540,6 +560,8 @@ async function saveModel() {
   delete payload.workflow_json
   delete payload.prompt_node
   delete payload.seed_node
+  delete payload.img2img_denoise
+  delete payload.inpaint_denoise
   delete payload.refine_prompt
   delete payload.system_prompt
 

frontend/package-lock.json

@@ -8,6 +8,7 @@
       "name": "ai-chat-member",
       "version": "1.0.0",
       "dependencies": {
+        "@tabler/icons-vue": "^3.45.0",
         "axios": "^1.7.9",
         "dompurify": "^3.2.4",
         "highlight.js": "^11.11.1",
@@ -865,6 +866,32 @@
         "win32"
       ]
     },
+    "node_modules/@tabler/icons": {
+      "version": "3.45.0",
+      "resolved": "https://registry.npmjs.org/@tabler/icons/-/icons-3.45.0.tgz",
+      "integrity": "sha512-jiATwV8+zGYLTZ7gMLGivCic+KtsMZXcDmufIG8umlLxoHhI6902hGYIEt0Oa9Y9SXblNzUlrisHm5jOFMxOQA==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/codecalm"
+      }
+    },
+    "node_modules/@tabler/icons-vue": {
+      "version": "3.45.0",
+      "resolved": "https://registry.npmjs.org/@tabler/icons-vue/-/icons-vue-3.45.0.tgz",
+      "integrity": "sha512-Q/cmDsx0zrzBScIL6Xxwevg7JqvkrteFW2R+NGTN9pwOrgJMzBLhyz/7ONvktjuwDn6eUKhFSM66CNAR8u3tRw==",
+      "license": "MIT",
+      "dependencies": {
+        "@tabler/icons": "3.45.0"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/codecalm"
+      },
+      "peerDependencies": {
+        "vue": ">=3.0.1"
+      }
+    },
     "node_modules/@types/estree": {
       "version": "1.0.9",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.9.tgz",

frontend/package.json

@@ -9,6 +9,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@tabler/icons-vue": "^3.45.0",
     "axios": "^1.7.9",
     "dompurify": "^3.2.4",
     "highlight.js": "^11.11.1",

frontend/src/App.vue

@@ -1,6 +1,8 @@
 <template>
   <router-view />
+  <NotificationCenter />
 </template>
 
 <script setup>
+import NotificationCenter from '@/components/NotificationCenter.vue'
 </script>

frontend/src/api/index.js

@@ -1,10 +1,34 @@
 import axios from 'axios'
+import { getGuestKey } from '@/utils/guestSession'
 
 const api = axios.create({
   baseURL: '/api',
   timeout: 60000
 })
 
+let guestRenewal = null
+
+async function renewGuestSession() {
+  const guestKey = getGuestKey()
+  if (!guestKey) throw new Error('游客身份已失效')
+
+  if (!guestRenewal) {
+    guestRenewal = axios.post('/api/auth/guest', { guest_key: guestKey })
+      .then(res => {
+        const data = res.data?.data
+        if (!data?.token) throw new Error('游客身份续期失败')
+        localStorage.setItem('token', data.token)
+        localStorage.setItem('auth_type', 'guest')
+        return data.token
+      })
+      .finally(() => {
+        guestRenewal = null
+      })
+  }
+
+  return guestRenewal
+}
+
 api.interceptors.request.use(config => {
   const token = localStorage.getItem('token')
   if (token) {
@@ -15,20 +39,49 @@ api.interceptors.request.use(config => {
 
 api.interceptors.response.use(
   res => res,
-  err => {
+  async err => {
     if (axios.isCancel(err)) {
       return Promise.reject(err)
     }
 
-    const message = err.response?.data?.message || '请求失败'
+    const message = err.response?.data?.message || err.message || '请求失败'
     if (err.response?.status === 401) {
+      const original = err.config || {}
+      const authType = localStorage.getItem('auth_type')
+      const requestUrl = String(original.url || '')
+      const isPublicAuthRequest = ['/auth/login', '/auth/register', '/auth/guest']
+        .some(path => requestUrl.includes(path))
+
+      if (isPublicAuthRequest) {
+        const wrapped = new Error(message)
+        wrapped.code = err.code
+        wrapped.status = 401
+        wrapped.detail = err.response?.data?.detail || ''
+        return Promise.reject(wrapped)
+      }
+
+      if (authType === 'guest' && !original._guestRetry) {
+        original._guestRetry = true
+        try {
+          const token = await renewGuestSession()
+          original.headers = original.headers || {}
+          original.headers.Authorization = `Bearer ${token}`
+          return api(original)
+        } catch {
+          // Fall through so the page can present a useful retry state.
+        }
+      }
+
       localStorage.removeItem('token')
-      if (!window.location.pathname.includes('/login')) {
+      localStorage.removeItem('auth_type')
+      if (authType === 'account' && !window.location.pathname.includes('/login')) {
         window.location.href = '/login'
       }
     }
     const wrapped = new Error(message)
     wrapped.code = err.code
+    wrapped.status = err.response?.status || null
+    wrapped.detail = err.response?.data?.detail || ''
     return Promise.reject(wrapped)
   }
 )

frontend/src/assets/main.css

@@ -1,22 +1,29 @@
-@import 'highlight.js/styles/github-dark.css';
+@import 'highlight.js/styles/github.css';
 
 :root {
-  --bg-primary: #212121;
+  --bg-primary: #f5f7fb;
-  --bg-secondary: #171717;
+  --bg-secondary: #ffffff;
-  --bg-tertiary: #2f2f2f;
+  --bg-tertiary: #f8fafc;
-  --bg-hover: #3a3a3a;
+  --bg-hover: #eef3f9;
-  --text-primary: #ececec;
+  --bg-soft: #f2f5f8;
-  --text-secondary: #b4b4b4;
+  --text-primary: #152033;
-  --text-muted: #8e8e8e;
+  --text-secondary: #526077;
-  --accent: #10a37f;
+  --text-muted: #7d899b;
-  --accent-hover: #0d8a6a;
+  --accent: #2d66da;
-  --border: #3a3a3a;
+  --accent-hover: #2458c4;
-  --danger: #ef4444;
+  --accent-soft: #edf4ff;
-  --sidebar-width: 260px;
+  --border: #e1e7ef;
-  --header-height: 56px;
+  --border-strong: #d4dce7;
-  --input-max-width: 768px;
+  --danger: #dc4c4c;
-  --radius: 12px;
+  --sidebar-width: 268px;
-  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
+  --header-height: 66px;
+  --input-max-width: 920px;
+  --content-max-width: 1040px;
+  --radius: 18px;
+  --radius-sm: 12px;
+  --shadow: 0 18px 50px rgba(38, 59, 92, 0.08);
+  --shadow-soft: 0 8px 24px rgba(38, 59, 92, 0.06);
+  --shadow-composer: 0 14px 38px rgba(38, 59, 92, 0.09);
 }
 
 * {
@@ -27,10 +34,16 @@
 
 html, body, #app {
   height: 100%;
-  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+  min-height: 100dvh;
+  font-family: "Microsoft YaHei UI", "PingFang SC", "Segoe UI", sans-serif;
   background: var(--bg-primary);
   color: var(--text-primary);
   -webkit-font-smoothing: antialiased;
+  text-rendering: optimizeLegibility;
+}
+
+body {
+  overflow: hidden;
 }
 
 a {
@@ -46,7 +59,16 @@ button {
   font: inherit;
 }
 
-input, textarea {
+button:focus-visible,
+a:focus-visible,
+select:focus-visible,
+textarea:focus-visible,
+input:focus-visible {
+  outline: 2px solid rgba(45, 102, 218, 0.72);
+  outline-offset: 2px;
+}
+
+input, textarea, select {
   font: inherit;
   color: inherit;
   background: transparent;
@@ -54,47 +76,55 @@ input, textarea {
   outline: none;
 }
 
-/* Scrollbar */
 ::-webkit-scrollbar {
   width: 6px;
 }
+
 ::-webkit-scrollbar-track {
   background: transparent;
 }
+
 ::-webkit-scrollbar-thumb {
-  background: var(--bg-hover);
+  background: #ced7e3;
-  border-radius: 3px;
+  border-radius: 999px;
 }
 
-/* Buttons */
 .btn {
   display: inline-flex;
   align-items: center;
   justify-content: center;
   gap: 8px;
   padding: 10px 20px;
-  border-radius: 8px;
+  border-radius: 999px;
   font-size: 14px;
   font-weight: 500;
-  transition: all 0.2s;
+  transition: color 0.16s ease, background 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
+}
+
+.btn:active {
+  transform: scale(0.97);
 }
 
 .btn-primary {
   background: var(--accent);
   color: white;
 }
+
 .btn-primary:hover {
   background: var(--accent-hover);
 }
+
 .btn-primary:disabled {
   opacity: 0.5;
   cursor: not-allowed;
 }
 
 .btn-ghost {
-  background: transparent;
+  background: #fff;
   color: var(--text-secondary);
+  border: 1px solid var(--border);
 }
+
 .btn-ghost:hover {
   background: var(--bg-hover);
   color: var(--text-primary);
@@ -103,11 +133,11 @@ input, textarea {
 .btn-danger {
   color: var(--danger);
 }
+
 .btn-danger:hover {
   background: rgba(239, 68, 68, 0.1);
 }
 
-/* Form */
 .form-group {
   margin-bottom: 16px;
 }
@@ -122,15 +152,16 @@ input, textarea {
 .form-input {
   width: 100%;
   padding: 12px 16px;
-  background: var(--bg-tertiary);
+  background: #fff;
   border: 1px solid var(--border);
-  border-radius: 8px;
+  border-radius: 14px;
   font-size: 15px;
-  transition: border-color 0.2s;
+  transition: border-color 0.2s, box-shadow 0.2s;
 }
 
 .form-input:focus {
   border-color: var(--accent);
+  box-shadow: 0 0 0 3px rgba(45, 102, 218, 0.11);
 }
 
 .form-error {
@@ -139,7 +170,6 @@ input, textarea {
   margin-top: 12px;
 }
 
-/* Markdown content */
 .markdown-body {
   line-height: 1.7;
   font-size: 15px;
@@ -149,11 +179,11 @@ input, textarea {
 .markdown-body p {
   margin-bottom: 12px;
 }
+
 .markdown-body p:last-child {
   margin-bottom: 0;
 }
 
-/* 单个换行（非空行分段）时也留出呼吸空间，避免像 OCR 结果那样一行行挤在一起 */
 .markdown-body br {
   content: '';
   display: block;
@@ -161,8 +191,9 @@ input, textarea {
 }
 
 .markdown-body pre {
-  background: var(--bg-secondary);
+  background: #f8fafc;
-  border-radius: 8px;
+  border: 1px solid var(--border);
+  border-radius: 14px;
   padding: 16px;
   overflow-x: auto;
   margin: 12px 0;
@@ -174,9 +205,9 @@ input, textarea {
 }
 
 .markdown-body :not(pre) > code {
-  background: var(--bg-tertiary);
+  background: #eef2ff;
   padding: 2px 6px;
-  border-radius: 4px;
+  border-radius: 6px;
 }
 
 .markdown-body ul, .markdown-body ol {
@@ -204,7 +235,7 @@ input, textarea {
 }
 
 .markdown-body th {
-  background: var(--bg-tertiary);
+  background: var(--bg-soft);
 }
 
 .markdown-body a {
@@ -216,12 +247,12 @@ input, textarea {
   border-radius: 8px;
 }
 
-/* Overlay for mobile sidebar */
 .sidebar-overlay {
   display: none;
   position: fixed;
   inset: 0;
-  background: rgba(0, 0, 0, 0.5);
+  background: rgba(21, 32, 51, 0.34);
+  backdrop-filter: blur(2px);
   z-index: 90;
 }
 
@@ -230,3 +261,13 @@ input, textarea {
     display: block;
   }
 }
+
+@media (prefers-reduced-motion: reduce) {
+  *,
+  *::before,
+  *::after {
+    scroll-behavior: auto !important;
+    animation-duration: 0.01ms !important;
+    animation-iteration-count: 1 !important;
+  }
+}

frontend/src/components/ChatSidebar.vue

@@ -1,47 +1,50 @@
 <template>
-  <aside class="sidebar" :class="{ open: chat.sidebarOpen }">
+  <aside class="sidebar" :class="{ open: chat.sidebarOpen }" aria-label="会话列表">
     <div class="sidebar-top">
-      <select
+      <div class="sidebar-brand">
-        v-if="settings.models.length"
+        <span class="brand-badge">AI</span>
-        class="model-select"
+        <div class="brand-copy">
-        title="选择模型"
+          <strong>{{ settings.siteName || 'AI Chat' }}</strong>
-        :value="chat.selectedModelId == null ? '' : String(chat.selectedModelId)"
+          <p>统一文本与图片创作</p>
-        @change="onModelChange"
+        </div>
-      >
+        <button class="sidebar-close" type="button" aria-label="关闭会话列表" @click="chat.closeSidebar">
-        <option
+          <IconX :size="19" :stroke-width="1.8" />
-          v-for="m in settings.models"
+        </button>
-          :key="m.id"
+      </div>
-          :value="String(m.id)"
+
-        >{{ m.name }}{{ m.provider === 'comfy' ? ' · 生图' : '' }}</option>
+      <button class="new-chat-btn" type="button" @click="handleNewChat">
-      </select>
+        <IconPlus :size="18" :stroke-width="1.9" />
-      <button class="new-chat-btn" @click="handleNewChat">
+        开始新对话
-        <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
-          <path d="M12 5v14M5 12h14"/>
-        </svg>
-        新对话
       </button>
     </div>
 
     <div class="conversation-list">
+      <div class="conversation-heading">
+        <span>最近对话</span>
+        <span>{{ chat.conversations.length }}</span>
+      </div>
+
       <div
         v-for="conv in chat.conversations"
         :key="conv.id"
         class="conversation-item"
         :class="{ active: conv.id === chat.currentId }"
+        :aria-current="conv.id === chat.currentId ? 'page' : undefined"
         @click="selectConv(conv.id)"
       >
-        <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+        <IconMessageCircle class="conversation-icon" :size="17" :stroke-width="1.7" />
-          <path d="M21 15a2 2 0 01-2 2H7l-4 4V5a2 2 0 012-2h14a2 2 0 012 2z"/>
-        </svg>
         <span class="conv-title">{{ conv.title }}</span>
-        <button class="delete-btn" @click.stop="handleDelete(conv.id)" title="删除">
+        <button
-          <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+          class="delete-btn"
-            <path d="M18 6L6 18M6 6l12 12"/>
+          type="button"
-          </svg>
+          :aria-label="`删除对话：${conv.title}`"
+          @click.stop="handleDelete(conv.id)"
+        >
+          <IconTrash :size="15" :stroke-width="1.8" />
         </button>
       </div>
 
-      <p v-if="!chat.conversations.length" class="empty-tip">暂无对话，点击上方开始</p>
+      <p v-if="!chat.conversations.length" class="empty-tip">还没有会话，先创建一个新对话</p>
     </div>
 
     <div class="sidebar-footer">
@@ -49,27 +52,27 @@
         <div class="avatar">{{ avatarLetter }}</div>
         <div class="user-meta">
           <span class="user-name">{{ auth.user?.nickname || auth.user?.username }}</span>
-          <span class="user-level">{{ auth.user?.membership_name }}</span>
+          <span class="user-level">{{ auth.isGuest ? '游客模式 · 自动保存' : (auth.user?.membership_name || '普通用户') }}</span>
         </div>
       </div>
-      <a
-        v-if="auth.user?.role === 'admin'"
-        :href="adminUrl"
-        target="_blank"
-        class="admin-entry"
-      >⚙️ 进入管理后台</a>
     </div>
   </aside>
 </template>
 
 <script setup>
 import { computed, watch } from 'vue'
+import IconMessageCircle from '@tabler/icons-vue/dist/esm/icons/IconMessageCircle.mjs'
+import IconPlus from '@tabler/icons-vue/dist/esm/icons/IconPlus.mjs'
+import IconTrash from '@tabler/icons-vue/dist/esm/icons/IconTrash.mjs'
+import IconX from '@tabler/icons-vue/dist/esm/icons/IconX.mjs'
 import { useAuthStore } from '@/stores/auth'
 import { useChatStore } from '@/stores/chat'
+import { useNotificationStore } from '@/stores/notification'
 import { useSettingsStore } from '@/stores/settings'
 
 const auth = useAuthStore()
 const chat = useChatStore()
+const notification = useNotificationStore()
 const settings = useSettingsStore()
 
 const avatarLetter = computed(() => {
@@ -77,8 +80,6 @@ const avatarLetter = computed(() => {
   return name.charAt(0).toUpperCase()
 })
 
-const adminUrl = import.meta.env.VITE_ADMIN_URL || `${window.location.protocol}//${window.location.hostname}:5174`
-
 watch(
   () => settings.models,
   (list) => {
@@ -90,28 +91,31 @@ watch(
   { immediate: true }
 )
 
-async function onModelChange(e) {
+async function handleNewChat() {
-  const value = e.target.value
   try {
-    await chat.setSelectedModel(value === '' ? null : Number(value))
+    await chat.createConversation(chat.selectedModelId)
+    chat.closeSidebar()
   } catch (err) {
-    alert(err.message || '切换模型失败')
+    notification.error(err, { title: '创建对话失败' })
   }
 }
 
-async function handleNewChat() {
-  await chat.createConversation(chat.selectedModelId)
-  chat.closeSidebar()
-}
-
 async function selectConv(id) {
-  await chat.selectConversation(id)
+  try {
-  chat.closeSidebar()
+    await chat.selectConversation(id)
+    chat.closeSidebar()
+  } catch (err) {
+    notification.error(err, { title: '加载对话失败' })
+  }
 }
 
 async function handleDelete(id) {
-  if (confirm('确定删除此对话？')) {
+  if (confirm('确定删除此对话吗？')) {
-    await chat.deleteConversation(id)
+    try {
+      await chat.deleteConversation(id)
+    } catch (err) {
+      notification.error(err, { title: '删除对话失败' })
+    }
   }
 }
 </script>
@@ -119,104 +123,196 @@ async function handleDelete(id) {
 <style scoped>
 .sidebar {
   width: var(--sidebar-width);
-  background: var(--bg-secondary);
+  background: rgba(255, 255, 255, 0.94);
   border-right: 1px solid var(--border);
   display: flex;
   flex-direction: column;
   flex-shrink: 0;
-  transition: transform 0.3s ease;
+  transition: transform 0.24s cubic-bezier(0.16, 1, 0.3, 1);
+  backdrop-filter: blur(14px);
 }
 
 .sidebar-top {
-  padding: 12px;
+  padding: 16px 14px 12px;
   display: flex;
   flex-direction: column;
-  gap: 8px;
+  gap: 14px;
 }
 
-.model-select {
+.sidebar-brand {
-  width: 100%;
+  display: flex;
-  padding: 8px 12px;
+  align-items: center;
-  background: var(--bg-tertiary);
+  gap: 10px;
-  border: 1px solid var(--border);
+  min-height: 40px;
-  border-radius: 8px;
+  padding: 2px;
-  font-size: 13px;
+}
+
+.brand-badge {
+  width: 38px;
+  height: 38px;
+  border-radius: 12px;
+  background: var(--accent-soft);
+  border: 1px solid #d9e6fb;
+  color: var(--accent);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 14px;
+  font-weight: 700;
+  letter-spacing: -0.02em;
+  flex-shrink: 0;
+}
+
+.brand-copy {
+  min-width: 0;
+  flex: 1;
+}
+
+.sidebar-brand strong {
+  display: block;
+  overflow: hidden;
   color: var(--text-primary);
+  font-size: 14px;
+  font-weight: 650;
+  line-height: 1.35;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.sidebar-brand p {
+  margin-top: 2px;
+  color: var(--text-muted);
+  font-size: 11px;
+  line-height: 1.3;
+}
+
+.sidebar-close {
+  display: none;
+  width: 34px;
+  height: 34px;
+  align-items: center;
+  justify-content: center;
+  border-radius: 50%;
+  color: var(--text-secondary);
 }
 
 .new-chat-btn {
   display: flex;
   align-items: center;
-  gap: 8px;
+  justify-content: center;
+  gap: 7px;
   width: 100%;
-  padding: 12px 16px;
+  min-height: 42px;
-  background: var(--bg-tertiary);
+  padding: 0 14px;
-  border: 1px solid var(--border);
+  background: var(--accent);
-  border-radius: 8px;
+  border-radius: 12px;
-  font-size: 14px;
+  color: #fff;
-  color: var(--text-primary);
+  font-size: 13px;
-  transition: background 0.2s;
+  font-weight: 600;
+  box-shadow: 0 7px 18px rgba(45, 102, 218, 0.2);
+  transition: background 0.16s ease, box-shadow 0.16s ease, transform 0.16s ease;
 }
+
 .new-chat-btn:hover {
-  background: var(--bg-hover);
+  background: var(--accent-hover);
+  box-shadow: 0 9px 22px rgba(45, 102, 218, 0.24);
+}
+
+.new-chat-btn:active {
+  transform: scale(0.98);
 }
 
 .conversation-list {
   flex: 1;
   overflow-y: auto;
-  padding: 4px 8px;
+  padding: 6px 9px 12px;
+}
+
+.conversation-heading {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 8px 9px 7px;
+  color: var(--text-muted);
+  font-size: 11px;
 }
 
 .conversation-item {
+  position: relative;
   display: flex;
   align-items: center;
-  gap: 10px;
+  gap: 9px;
-  padding: 10px 12px;
+  min-height: 42px;
-  border-radius: 8px;
+  margin-bottom: 2px;
+  padding: 8px 8px 8px 10px;
+  border-radius: 10px;
   cursor: pointer;
-  font-size: 14px;
   color: var(--text-secondary);
-  transition: all 0.15s;
+  font-size: 13px;
+  transition: background 0.15s ease, color 0.15s ease;
 }
+
 .conversation-item:hover {
-  background: var(--bg-hover);
-  color: var(--text-primary);
-}
-.conversation-item.active {
   background: var(--bg-tertiary);
   color: var(--text-primary);
 }
 
+.conversation-item.active {
+  background: var(--accent-soft);
+  box-shadow: inset 3px 0 0 var(--accent);
+  color: var(--text-primary);
+  font-weight: 500;
+}
+
+.conversation-icon {
+  color: var(--text-muted);
+  flex-shrink: 0;
+}
+
+.conversation-item.active .conversation-icon {
+  color: var(--accent);
+}
+
 .conv-title {
   flex: 1;
-  white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
+  white-space: nowrap;
 }
 
 .delete-btn {
-  opacity: 0;
+  width: 28px;
-  padding: 4px;
+  height: 28px;
-  border-radius: 4px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 50%;
   color: var(--text-muted);
+  opacity: 0;
+  flex-shrink: 0;
+  transition: background 0.15s ease, color 0.15s ease, opacity 0.15s ease;
 }
-.conversation-item:hover .delete-btn {
+
+.conversation-item:hover .delete-btn,
+.delete-btn:focus-visible {
   opacity: 1;
 }
+
 .delete-btn:hover {
+  background: #fff0f0;
   color: var(--danger);
-  background: rgba(239, 68, 68, 0.1);
 }
 
 .empty-tip {
-  text-align: center;
+  padding: 26px 18px;
-  padding: 24px 16px;
-  font-size: 13px;
   color: var(--text-muted);
+  font-size: 12px;
+  line-height: 1.6;
+  text-align: center;
 }
 
 .sidebar-footer {
-  padding: 12px;
+  padding: 10px 12px 12px;
   border-top: 1px solid var(--border);
 }
 
@@ -224,63 +320,73 @@ async function handleDelete(id) {
   display: flex;
   align-items: center;
   gap: 10px;
-  padding: 8px;
+  padding: 6px;
 }
 
 .avatar {
-  width: 32px;
+  width: 34px;
-  height: 32px;
+  height: 34px;
-  border-radius: 50%;
+  border-radius: 11px;
-  background: var(--accent);
+  background: #eef1f6;
+  color: var(--text-primary);
   display: flex;
   align-items: center;
   justify-content: center;
-  font-size: 14px;
+  font-size: 13px;
-  font-weight: 600;
+  font-weight: 650;
-  color: white;
+  flex-shrink: 0;
 }
 
 .user-meta {
   display: flex;
   flex-direction: column;
+  min-width: 0;
 }
 
 .user-name {
-  font-size: 14px;
+  overflow: hidden;
-  font-weight: 500;
+  color: var(--text-primary);
+  font-size: 13px;
+  font-weight: 550;
+  text-overflow: ellipsis;
+  white-space: nowrap;
 }
 
 .user-level {
-  font-size: 12px;
+  margin-top: 2px;
   color: var(--text-muted);
-}
+  font-size: 11px;
-
-.admin-entry {
-  display: block;
-  margin-top: 8px;
-  padding: 10px 12px;
-  text-align: center;
-  font-size: 13px;
-  color: var(--accent);
-  background: rgba(16, 163, 127, 0.1);
-  border-radius: 8px;
-  text-decoration: none;
-}
-.admin-entry:hover {
-  background: rgba(16, 163, 127, 0.2);
 }
 
 @media (max-width: 768px) {
   .sidebar {
     position: fixed;
-    top: 0;
+    inset: 0 auto 0 0;
-    left: 0;
-    bottom: 0;
     z-index: 100;
+    width: min(84vw, 304px);
     transform: translateX(-100%);
+    box-shadow: 20px 0 50px rgba(21, 32, 51, 0.14);
   }
+
   .sidebar.open {
     transform: translateX(0);
   }
+
+  .sidebar-close {
+    display: flex;
+  }
+
+  .delete-btn {
+    opacity: 0.68;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .sidebar,
+  .new-chat-btn,
+  .conversation-item,
+  .delete-btn {
+    transition: none;
+  }
 }
 </style>

frontend/src/components/MessageItem.vue

@@ -1,19 +1,28 @@
 <template>
-  <div class="message" :class="message.role">
+  <div class="message" :class="[message.role, { streaming: isStreaming }]">
-    <div class="message-avatar">
+    <div class="message-avatar" aria-hidden="true">
-      {{ message.role === 'user' ? 'U' : 'AI' }}
+      <IconUser v-if="message.role === 'user'" :size="16" :stroke-width="1.8" />
+      <IconSparkles v-else :size="16" :stroke-width="1.8" />
     </div>
-    <div class="message-body">
+    <div ref="messageBodyRef" class="message-body" :class="{ 'wide-image-message': isAssistantImageGrid || showImageSkeleton }">
-      <!-- 附件 -->
+      <div v-if="showImageSkeleton" class="image-loading-grid" aria-label="正在生成四张图片">
-      <div v-if="attachments.length" class="attachments">
+        <span class="generation-progress"><IconSparkles :size="15" :stroke-width="1.8" /> {{ generationProgress }}%</span>
+        <i v-for="index in 4" :key="index" />
+      </div>
+      <div v-if="attachments.length" class="attachments" :class="{ 'image-grid': isAssistantImageGrid }">
         <template v-for="(att, i) in attachments" :key="i">
           <img
             v-if="att?.type === 'image' && features.image && !brokenImages[i]"
             :src="att.url"
-            :alt="att.name"
+            :alt="att.name || '生成图片'"
             class="att-image"
+            role="button"
+            tabindex="0"
+            :aria-label="`放大查看${att.name || '图片'}`"
             @error="markBroken(i)"
-            @click="previewImage(att.url)"
+            @click="previewImage(att)"
+            @keydown.enter="previewImage(att)"
+            @keydown.space.prevent="previewImage(att)"
           />
           <a
             v-else-if="att?.type === 'image'"
@@ -22,7 +31,8 @@
             rel="noopener"
             class="att-document"
           >
-            🖼️ {{ att.name || '图片' }}（点击打开）
+            <IconPhoto :size="17" :stroke-width="1.8" />
+            {{ att.name || '打开图片' }}
           </a>
           <video
             v-else-if="att?.type === 'video' && features.video"
@@ -40,26 +50,64 @@
             v-else-if="att?.type === 'document' && features.document"
             :href="att.url"
             target="_blank"
+            rel="noopener"
             class="att-document"
           >
-            {{ documentIcon(att) }} {{ att.name }} ({{ formatFileSize(att.size) }})
+            <IconFileText :size="17" :stroke-width="1.8" />
+            <span class="document-name">{{ att.name }}</span>
+            <span class="document-size">{{ formatFileSize(att.size) }}</span>
           </a>
         </template>
       </div>
 
-      <!-- 文本内容 -->
       <div
         v-if="message.content"
         class="message-content"
         :class="{ 'markdown-body': useMarkdown }"
         v-html="renderedContent"
       />
+
+      <div
+        v-if="(message.content || firstImage) && !isStreaming"
+        class="message-actions"
+        :class="{ 'has-image': firstImage }"
+      >
+        <button
+          v-if="firstImage"
+          class="message-action-btn image-edit-btn"
+          type="button"
+          aria-label="在 AI 图片工作台中编辑"
+          @click="previewImage(firstImage)"
+        >
+          <IconEdit :size="15" :stroke-width="1.8" />
+          <span>AI 编辑</span>
+        </button>
+        <button
+          v-if="message.content || firstImage"
+          class="message-action-btn"
+          type="button"
+          :aria-label="copied ? '消息图文内容已复制' : '复制消息图文内容'"
+          @click="copyContent"
+        >
+          <IconCheck v-if="copied" :size="15" :stroke-width="2" />
+          <IconCopy v-else :size="15" :stroke-width="1.8" />
+          <span>{{ copied ? '已复制' : '复制' }}</span>
+        </button>
+      </div>
     </div>
   </div>
 </template>
 
 <script setup>
-import { computed, reactive } from 'vue'
+import { computed, reactive, ref, onBeforeUnmount, watch } from 'vue'
+import IconCheck from '@tabler/icons-vue/dist/esm/icons/IconCheck.mjs'
+import IconCopy from '@tabler/icons-vue/dist/esm/icons/IconCopy.mjs'
+import IconFileText from '@tabler/icons-vue/dist/esm/icons/IconFileText.mjs'
+import IconEdit from '@tabler/icons-vue/dist/esm/icons/IconEdit.mjs'
+import IconPhoto from '@tabler/icons-vue/dist/esm/icons/IconPhoto.mjs'
+import IconSparkles from '@tabler/icons-vue/dist/esm/icons/IconSparkles.mjs'
+import IconUser from '@tabler/icons-vue/dist/esm/icons/IconUser.mjs'
+import { useNotificationStore } from '@/stores/notification'
 import { useSettingsStore } from '@/stores/settings'
 import { renderMarkdown, formatFileSize } from '@/utils/markdown'
 
@@ -67,23 +115,61 @@ const props = defineProps({
   message: { type: Object, required: true },
   isStreaming: Boolean
 })
+const emit = defineEmits(['preview-image'])
 
 const settings = useSettingsStore()
+const notification = useNotificationStore()
 const features = computed(() => settings.features)
+const copied = ref(false)
+const messageBodyRef = ref(null)
+const generationProgress = ref(4)
+const fourImageLoading = ref(false)
+let copiedTimer = null
+let progressTimer = null
+
+onBeforeUnmount(() => {
+  if (copiedTimer) clearTimeout(copiedTimer)
+  if (progressTimer) clearInterval(progressTimer)
+})
 
 const attachments = computed(() => {
   const raw = props.message.attachments
   const list = Array.isArray(raw) ? raw : (raw && typeof raw === 'object' ? Object.values(raw) : [])
-  return list.filter(att => att && typeof att === 'object')
+  return list.filter(att => att && typeof att === 'object' && !att.hidden)
 })
+const firstImage = computed(() => attachments.value.find(att => att?.type === 'image' && att?.url) || null)
+const imageAttachments = computed(() => attachments.value.filter(att => att?.type === 'image' && att?.url))
+const isAssistantImageGrid = computed(() => props.message.role === 'assistant' && imageAttachments.value.length >= 2)
+const pendingImageCount = computed(() => Number(props.message.pending_image_count || 0))
+const showImageSkeleton = computed(() => fourImageLoading.value && !imageAttachments.value.length)
 
-function documentIcon(att) {
+watch(
-  const name = (att?.name || '').toLowerCase()
+  () => [props.isStreaming, props.message.pending_job, pendingImageCount.value, props.message.content, imageAttachments.value.length],
-  const mime = att?.mime || ''
+  ([streaming, pending, count, content, images]) => {
-  if (name.endsWith('.pdf') || mime.includes('pdf')) return '📕'
+    if (images) {
-  if (name.endsWith('.doc') || name.endsWith('.docx') || mime.includes('word')) return '📘'
+      fourImageLoading.value = false
-  return '📄'
+      return
-}
+    }
+    if ((pending && Number(count) >= 4) || (streaming && /正在生成\s*4\s*张图片|正在生成图片|图片生成中/u.test(String(content || '')))) {
+      fourImageLoading.value = true
+      return
+    }
+    if (!pending && !streaming) fourImageLoading.value = false
+  },
+  { immediate: true }
+)
+
+watch(showImageSkeleton, active => {
+  if (progressTimer) {
+    clearInterval(progressTimer)
+    progressTimer = null
+  }
+  if (!active) return
+  generationProgress.value = 4
+  progressTimer = setInterval(() => {
+    generationProgress.value = Math.min(92, generationProgress.value + Math.max(1, Math.round((94 - generationProgress.value) * 0.08)))
+  }, 800)
+}, { immediate: true })
 
 const useMarkdown = computed(() => {
   return features.value.markdown && props.message.role === 'assistant'
@@ -109,8 +195,250 @@ function markBroken(index) {
   brokenImages[index] = true
 }
 
-function previewImage(url) {
+function previewImage(attachment) {
-  window.open(url, '_blank')
+  if (!attachment?.url) return
+  emit('preview-image', {
+    url: attachment.url,
+    name: attachment.name || '图片预览'
+  })
+}
+
+const COPY_STYLE_PROPERTIES = [
+  'background-color', 'border', 'border-collapse', 'border-radius', 'box-shadow',
+  'color', 'display', 'font-family', 'font-size', 'font-style', 'font-weight',
+  'height', 'letter-spacing', 'line-height', 'list-style-position', 'list-style-type',
+  'margin', 'margin-bottom', 'margin-left', 'margin-right', 'margin-top', 'max-height',
+  'max-width', 'min-width', 'padding', 'padding-bottom', 'padding-left', 'padding-right',
+  'padding-top', 'text-align', 'text-decoration', 'vertical-align', 'white-space', 'width'
+]
+
+function inlineCopyStyles(source, clone) {
+  if (!(source instanceof Element) || !(clone instanceof Element)) return
+  const computedStyle = window.getComputedStyle(source)
+  COPY_STYLE_PROPERTIES.forEach(property => {
+    const value = computedStyle.getPropertyValue(property)
+    if (value) clone.style.setProperty(property, value)
+  })
+
+  clone.removeAttribute('class')
+  clone.removeAttribute('role')
+  clone.removeAttribute('tabindex')
+  clone.removeAttribute('aria-label')
+  if (clone instanceof HTMLImageElement) {
+    const rect = source.getBoundingClientRect()
+    if (rect.width > 0) clone.style.width = `${Math.round(rect.width)}px`
+    clone.style.height = 'auto'
+    clone.style.cursor = 'default'
+  }
+
+  const sourceChildren = Array.from(source.children)
+  const cloneChildren = Array.from(clone.children)
+  sourceChildren.forEach((child, index) => inlineCopyStyles(child, cloneChildren[index]))
+}
+
+function blobToDataUrl(blob) {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader()
+    reader.onload = () => resolve(String(reader.result || ''))
+    reader.onerror = () => reject(reader.error || new Error('图片读取失败'))
+    reader.readAsDataURL(blob)
+  })
+}
+
+async function fetchImageBlob(url) {
+  const response = await fetch(url, { credentials: 'include' })
+  if (!response.ok) throw new Error(`图片读取失败（${response.status}）`)
+  const blob = await response.blob()
+  if (!blob.type.startsWith('image/')) throw new Error('附件不是图片')
+  return blob
+}
+
+function imageBlobToPng(blob) {
+  if (blob.type === 'image/png') return Promise.resolve(blob)
+  return new Promise((resolve, reject) => {
+    const image = new Image()
+    const objectUrl = URL.createObjectURL(blob)
+    image.onload = () => {
+      const canvas = document.createElement('canvas')
+      canvas.width = image.naturalWidth
+      canvas.height = image.naturalHeight
+      const context = canvas.getContext('2d')
+      if (!context) {
+        URL.revokeObjectURL(objectUrl)
+        reject(new Error('浏览器无法转换图片'))
+        return
+      }
+      context.drawImage(image, 0, 0)
+      URL.revokeObjectURL(objectUrl)
+      canvas.toBlob(result => {
+        if (result) resolve(result)
+        else reject(new Error('浏览器无法转换图片'))
+      }, 'image/png')
+    }
+    image.onerror = () => {
+      URL.revokeObjectURL(objectUrl)
+      reject(new Error('图片解码失败'))
+    }
+    image.src = objectUrl
+  })
+}
+
+function prepareRichCopyPayload() {
+  const sourceBody = messageBodyRef.value
+  const container = document.createElement('div')
+  container.setAttribute('data-ai-chat-message', '')
+  container.style.cssText = 'max-width:720px;color:#1f2937;font-family:Arial,"Microsoft YaHei",sans-serif;font-size:15px;line-height:1.75;'
+
+  if (sourceBody) {
+    Array.from(sourceBody.children).forEach(source => {
+      if (!source.classList.contains('attachments') && !source.classList.contains('message-content')) return
+      const clone = source.cloneNode(true)
+      inlineCopyStyles(source, clone)
+      if (source.classList.contains('attachments')) {
+        clone.style.display = 'block'
+        clone.style.width = '100%'
+      }
+      container.appendChild(clone)
+    })
+  }
+
+  if (!container.children.length && props.message.content) {
+    const content = document.createElement('div')
+    content.innerHTML = renderedContent.value
+    container.appendChild(content)
+  }
+
+  const imageJobs = Array.from(container.querySelectorAll('img')).map((image, index) => {
+    const attachment = imageAttachments.value[index]
+    const url = attachment?.url || image.getAttribute('src') || ''
+    const absoluteUrl = url ? new URL(url, window.location.href).href : ''
+    if (absoluteUrl) image.src = absoluteUrl
+    return { image, url: absoluteUrl }
+  }).filter(job => job.url)
+
+  const textParts = []
+  if (props.message.content) textParts.push(String(props.message.content))
+  if (!props.message.content && imageAttachments.value.length) {
+    textParts.push(...imageAttachments.value.map(att => att.name || '图片'))
+  }
+
+  return {
+    container,
+    text: textParts.join('\n\n'),
+    imageJobs
+  }
+}
+
+async function resolveRichCopyPayload(prepared) {
+  const blobs = []
+  await Promise.all(prepared.imageJobs.map(async ({ image, url }, index) => {
+    try {
+      const blob = await fetchImageBlob(url)
+      blobs[index] = blob
+      image.src = await blobToDataUrl(blob)
+    } catch {
+      // Keep the absolute URL so rich-text targets can still retrieve the image.
+      image.src = url
+    }
+  }))
+
+  return {
+    html: prepared.container.outerHTML,
+    text: prepared.text,
+    primaryImage: blobs.find(Boolean) || null
+  }
+}
+
+function legacyCopy(payload) {
+  const holder = document.createElement('div')
+  holder.contentEditable = 'true'
+  holder.innerHTML = payload.html
+  holder.style.position = 'fixed'
+  holder.style.left = '-10000px'
+  holder.style.top = '0'
+  holder.style.opacity = '0'
+  document.body.appendChild(holder)
+
+  const selection = window.getSelection()
+  const previousRanges = []
+  if (selection) {
+    for (let index = 0; index < selection.rangeCount; index += 1) {
+      previousRanges.push(selection.getRangeAt(index).cloneRange())
+    }
+    selection.removeAllRanges()
+    const range = document.createRange()
+    range.selectNodeContents(holder)
+    selection.addRange(range)
+  }
+
+  const success = document.execCommand('copy')
+  selection?.removeAllRanges()
+  previousRanges.forEach(range => selection?.addRange(range))
+  holder.remove()
+  if (!success) throw new Error('浏览器未允许复制')
+}
+
+function writeRichClipboard(prepared) {
+  const immediatePayload = {
+    html: prepared.container.outerHTML,
+    text: prepared.text
+  }
+
+  if (!navigator.clipboard?.write || typeof ClipboardItem === 'undefined') {
+    legacyCopy(immediatePayload)
+    return Promise.resolve()
+  }
+
+  // Start the Clipboard API call inside the click event. The payload promises may
+  // finish later, but the browser's transient user activation is retained.
+  const payloadPromise = resolveRichCopyPayload(prepared)
+  const representations = {
+    'text/html': payloadPromise.then(payload => new Blob([payload.html], { type: 'text/html' })),
+    'text/plain': new Blob([prepared.text], { type: 'text/plain' })
+  }
+  if (prepared.imageJobs.length) {
+    representations['image/png'] = payloadPromise.then(payload => {
+      if (!payload.primaryImage) throw new Error('图片数据读取失败')
+      return imageBlobToPng(payload.primaryImage)
+    })
+  }
+
+  return navigator.clipboard.write([new ClipboardItem(representations)])
+}
+
+async function copyContent() {
+  const text = String(props.message.content || '')
+  if (!text && !imageAttachments.value.length) return
+
+  let success = false
+  const prepared = prepareRichCopyPayload()
+  try {
+    await writeRichClipboard(prepared)
+    success = true
+  } catch {
+    try {
+      legacyCopy({ html: prepared.container.outerHTML, text: prepared.text })
+      success = true
+    } catch {
+      success = false
+    }
+  }
+
+  if (!success) {
+    notification.show({
+      type: 'error',
+      title: '复制失败',
+      message: '浏览器未允许访问剪贴板，请直接选中消息文字后复制。',
+      duration: 4500
+    })
+    return
+  }
+
+  copied.value = true
+  if (copiedTimer) clearTimeout(copiedTimer)
+  copiedTimer = setTimeout(() => {
+    copied.value = false
+  }, 1800)
 }
 </script>
 
@@ -118,51 +446,48 @@ function previewImage(url) {
 .message {
   display: flex;
   gap: 10px;
+  width: 100%;
   max-width: var(--input-max-width);
-  margin: 0 auto 20px;
+  margin: 0 auto 30px;
-  padding: 0 8px;
+  padding: 0 10px;
-}
-
-.message.assistant {
-  justify-content: flex-start;
 }
 
 .message.user {
   flex-direction: row-reverse;
-  justify-content: flex-start;
 }
 
 .message-avatar {
-  width: 32px;
+  width: 30px;
-  height: 32px;
+  height: 30px;
-  border-radius: 50%;
+  border-radius: 10px;
   display: flex;
   align-items: center;
   justify-content: center;
-  font-size: 12px;
-  font-weight: 600;
   flex-shrink: 0;
+  border: 1px solid var(--border);
 }
 
 .message.user .message-avatar {
-  background: #5436da;
+  background: #edf1f6;
-  color: white;
+  color: var(--text-secondary);
 }
 
 .message.assistant .message-avatar {
-  background: var(--accent);
+  background: var(--accent-soft);
-  color: white;
+  border-color: #dbe7fa;
+  color: var(--accent);
 }
 
 .message-body {
   display: flex;
   flex-direction: column;
   min-width: 0;
-  max-width: 78%;
+  max-width: 84%;
-  padding-top: 2px;
+  padding-top: 1px;
 }
 
 .message.user .message-body {
+  max-width: 76%;
   align-items: flex-end;
 }
 
@@ -170,39 +495,114 @@ function previewImage(url) {
   align-items: flex-start;
 }
 
+.message.assistant .message-body.wide-image-message {
+  width: 100%;
+  max-width: 100%;
+}
+
 .message-content {
   display: inline-block;
   max-width: 100%;
+  color: var(--text-primary);
   font-size: 15px;
-  line-height: 1.7;
+  line-height: 1.75;
-  padding: 10px 14px;
+  cursor: text;
-  border-radius: 16px;
+  user-select: text;
+}
+
+.message-actions {
+  display: flex;
+  width: 100%;
+  height: 0;
+  justify-content: flex-start;
+  opacity: 0;
+  pointer-events: none;
+  transform: translateY(4px);
+  transition: opacity 0.16s ease;
+}
+
+.image-edit-btn {
+  color: var(--accent);
+  background: var(--accent-soft);
+}
+
+.message-actions.has-image {
+  height: auto;
+  margin-top: 7px;
+  opacity: 1;
+  pointer-events: auto;
+  transform: none;
+}
+
+.message.user .message-actions {
+  justify-content: flex-end;
+}
+
+.message:hover .message-actions,
+.message:focus-within .message-actions {
+  opacity: 1;
+  pointer-events: auto;
+}
+
+.message-action-btn {
+  min-height: 28px;
+  padding: 0 8px;
+  border-radius: 8px;
+  color: var(--text-muted);
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  font-size: 11px;
+  font-weight: 550;
+  white-space: nowrap;
+  transition: color 0.16s ease, background 0.16s ease, transform 0.16s ease;
+}
+
+.message-action-btn:hover,
+.message-action-btn:focus-visible {
+  background: #fff;
+  color: var(--accent);
+}
+
+.message-action-btn:active {
+  transform: scale(0.96);
 }
 
 .message.user .message-content {
-  background: var(--accent);
+  padding: 11px 14px;
-  color: #fff;
+  background: var(--accent-soft);
-  border-radius: 16px 16px 4px 16px;
+  border: 1px solid #dbe7fa;
+  border-radius: 16px 16px 5px 16px;
 }
 
 .message.assistant .message-content {
-  background: var(--bg-tertiary);
+  padding: 3px 1px;
-  color: var(--text-primary);
+}
-  border-radius: 16px 16px 16px 4px;
+
+.message.streaming .message-content::after {
+  content: '';
+  display: inline-block;
+  width: 2px;
+  height: 15px;
+  margin-left: 3px;
+  border-radius: 1px;
+  background: var(--accent);
+  vertical-align: -2px;
+  animation: cursor-blink 0.9s step-end infinite;
 }
 
 .message-content :deep(pre) {
-  background: var(--bg-secondary);
+  background: #f6f8fb;
+  border-color: var(--border);
 }
 
 .message.user .message-content :deep(pre),
 .message.user .message-content :deep(:not(pre) > code) {
-  background: rgba(0, 0, 0, 0.2);
+  background: rgba(255, 255, 255, 0.72);
 }
 
 .message.user .message-content :deep(a) {
-  color: #fff;
+  color: var(--accent);
-  text-decoration: underline;
 }
 
 .attachments {
@@ -212,54 +612,187 @@ function previewImage(url) {
   margin-bottom: 8px;
 }
 
+.attachments.image-grid,
+.image-loading-grid {
+  display: grid;
+  position: relative;
+  width: 100%;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: 4px;
+  overflow: hidden;
+  border-radius: 16px;
+}
+
+.attachments.image-grid .att-image {
+  width: 100%;
+  max-width: none;
+  height: auto;
+  max-height: none;
+  aspect-ratio: 1 / 1;
+  border: 0;
+  border-radius: 0;
+  box-shadow: none;
+}
+
+.image-loading-grid i {
+  display: block;
+  aspect-ratio: 1 / 1;
+  background: linear-gradient(115deg, #edf2ff 8%, #f5f1ff 38%, #eaf3ff 64%, #edf2ff 92%);
+  background-size: 240% 100%;
+  animation: image-skeleton 1.8s ease-in-out infinite;
+}
+
+.generation-progress {
+  display: inline-flex;
+  position: absolute;
+  z-index: 1;
+  top: 10px;
+  left: 10px;
+  align-items: center;
+  gap: 4px;
+  padding: 5px 8px;
+  border: 1px solid rgba(214, 223, 241, .9);
+  border-radius: 8px;
+  background: rgba(255, 255, 255, .92);
+  color: #4b5565;
+  font-size: 12px;
+  font-style: normal;
+  font-weight: 650;
+  box-shadow: 0 5px 16px rgba(38, 59, 92, .08);
+}
+
 .message.user .attachments {
   justify-content: flex-end;
 }
 
 .att-image {
-  max-width: 240px;
+  display: block;
-  max-height: 240px;
+  width: auto;
-  border-radius: 8px;
+  max-width: min(100%, 460px);
-  cursor: pointer;
+  max-height: 520px;
+  border-radius: 16px;
+  border: 1px solid var(--border-strong);
+  box-shadow: 0 12px 32px rgba(38, 59, 92, 0.1);
+  cursor: zoom-in;
   object-fit: cover;
 }
 
+.message.user .att-image {
+  max-width: min(100%, 300px);
+  max-height: 360px;
+}
+
 .att-video {
-  max-width: 360px;
+  width: min(100%, 460px);
-  max-height: 240px;
+  max-height: 320px;
-  border-radius: 8px;
+  border-radius: 16px;
 }
 
 .att-audio {
   width: 100%;
-  max-width: 360px;
+  max-width: 380px;
 }
 
 .att-document {
   display: inline-flex;
   align-items: center;
-  gap: 6px;
+  gap: 7px;
-  padding: 8px 12px;
+  max-width: 360px;
-  background: var(--bg-tertiary);
+  padding: 9px 11px;
-  border-radius: 8px;
+  background: #fff;
-  font-size: 13px;
+  border: 1px solid var(--border);
+  border-radius: 12px;
   color: var(--text-primary);
+  font-size: 13px;
+  transition: background 0.15s ease, border-color 0.15s ease;
 }
+
 .att-document:hover {
-  background: var(--bg-hover);
+  background: var(--bg-tertiary);
+  border-color: var(--border-strong);
+}
+
+.document-name {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.document-size {
+  color: var(--text-muted);
+  font-size: 11px;
+  white-space: nowrap;
+}
+
+@keyframes cursor-blink {
+  0%, 45% { opacity: 1; }
+  46%, 100% { opacity: 0; }
+}
+
+@keyframes image-skeleton {
+  0% { background-position: 100% 0; }
+  100% { background-position: -100% 0; }
 }
 
 @media (max-width: 768px) {
   .message {
     gap: 8px;
-    margin-bottom: 16px;
+    margin-bottom: 26px;
+    padding: 0 2px;
   }
-  .message-body {
+
-    max-width: 85%;
+  .message-avatar {
+    width: 28px;
+    height: 28px;
+    border-radius: 9px;
   }
-  .att-image {
+
-    max-width: 180px;
+  .message-body,
-    max-height: 180px;
+  .message.user .message-body {
+    max-width: calc(100% - 38px);
+  }
+
+  .message-content {
+    font-size: 14px;
+    line-height: 1.7;
+  }
+
+  .message.user .message-content {
+    padding: 10px 12px;
+  }
+
+  .message-actions {
+    opacity: 1;
+    pointer-events: auto;
+  }
+
+  .att-image,
+  .message.user .att-image {
+    max-width: 100%;
+    max-height: 420px;
+    border-radius: 14px;
+  }
+
+  .attachments.image-grid,
+  .image-loading-grid {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    border-radius: 14px;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .message-actions,
+  .message-action-btn,
+  .message.streaming .message-content::after {
+    animation: none;
+  }
+
+  .att-document {
+    transition: none;
+  }
+
+  .image-loading-grid i {
+    animation: none;
   }
 }
 </style>

frontend/src/components/MessageList.vue

@@ -1,34 +1,74 @@
 <template>
-  <div class="message-list" ref="listRef">
+  <div class="message-list-shell">
-    <div v-if="!visibleMessages.length && !loading && !sending && !hasStreaming" class="welcome">
+    <div
-      <div class="welcome-icon">💬</div>
+      ref="listRef"
-      <h2>有什么可以帮您的？</h2>
+      class="message-list"
-      <p>输入消息开始对话，支持 Markdown、图片、文件等</p>
+      @scroll.passive="handleScroll"
+      @wheel.passive="handleWheel"
+      @touchstart.passive="handleTouchStart"
+      @touchmove.passive="handleTouchMove"
+    >
+      <div v-if="!visibleMessages.length && !loading && !sending && !hasStreaming" class="welcome">
+        <div class="welcome-panel">
+          <div class="welcome-icon" aria-hidden="true">
+            <IconSparkles :size="25" :stroke-width="1.7" />
+          </div>
+          <h2>一个输入框，完成对话与图片创作</h2>
+          <p>描述需求即可开始；使用 Agent 时会自动选择语言或图片生成模型。</p>
+        </div>
+      </div>
+
+      <div v-if="loading" class="loading-state" aria-label="正在加载会话">
+        <span></span>
+        <span></span>
+        <span></span>
+      </div>
+
+      <MessageItem
+        v-for="msg in visibleMessages"
+        :key="msg.id"
+        :message="msg"
+        @preview-image="openImagePreview"
+      />
+
+      <MessageItem
+        v-if="hasStreaming"
+        :message="{ role: 'assistant', content: streaming, content_type: 'mixed', attachments: streamingAttachments }"
+        :is-streaming="true"
+        @preview-image="openImagePreview"
+      />
+
+      <div v-if="sending && !hasStreaming" class="typing-indicator" aria-label="AI 正在回复">
+        <span></span><span></span><span></span>
+      </div>
     </div>
 
-    <div v-if="loading" class="loading-state">加载中...</div>
+    <Transition name="scroll-button">
+      <button
+        v-if="showScrollButton"
+        class="scroll-bottom-btn"
+        type="button"
+        aria-label="回到最新消息"
+        title="回到最新消息"
+        @click="resumeAutoScroll"
+      >
+        <IconArrowDown :size="18" :stroke-width="2" />
+        <span>回到最新</span>
+      </button>
+    </Transition>
 
-    <MessageItem
+    <Teleport to="body">
-      v-for="msg in visibleMessages"
+      <ImageWorkbench v-if="previewedImage" :image="previewedImage" @close="closeImagePreview" />
-      :key="msg.id"
+    </Teleport>
-      :message="msg"
-    />
-
-    <MessageItem
-      v-if="hasStreaming"
-      :message="{ role: 'assistant', content: streaming, content_type: 'mixed', attachments: streamingAttachments }"
-      :is-streaming="true"
-    />
-
-    <div v-if="sending && !hasStreaming" class="typing-indicator">
-      <span></span><span></span><span></span>
-    </div>
   </div>
 </template>
 
 <script setup>
-import { ref, watch, nextTick, computed } from 'vue'
+import { ref, watch, nextTick, computed, onMounted, onBeforeUnmount } from 'vue'
+import IconArrowDown from '@tabler/icons-vue/dist/esm/icons/IconArrowDown.mjs'
+import IconSparkles from '@tabler/icons-vue/dist/esm/icons/IconSparkles.mjs'
 import MessageItem from './MessageItem.vue'
+import ImageWorkbench from './ImageWorkbench.vue'
 
 const props = defineProps({
   messages: { type: Array, default: () => [] },
@@ -39,6 +79,14 @@ const props = defineProps({
 })
 
 const listRef = ref(null)
+const autoScrollEnabled = ref(true)
+const isAtBottom = ref(true)
+const previewedImage = ref(null)
+let previousBodyOverflow = ''
+let previewLocksBody = false
+let touchY = null
+
+const BOTTOM_EPSILON = 2
 
 const hasStreaming = computed(() => {
   const hasText = !!(props.streaming && String(props.streaming).trim())
@@ -50,78 +98,453 @@ const visibleMessages = computed(() => {
   return props.messages.filter(msg => {
     const hasContent = !!(msg.content && String(msg.content).trim())
     const attachments = msg.attachments || []
-    const hasAttachments = Array.isArray(attachments) && attachments.length > 0
+    const hasAttachments = Array.isArray(attachments) ? attachments.length > 0 : false
     return hasContent || hasAttachments
   })
 })
 
+const showScrollButton = computed(() => {
+  return !isAtBottom.value && (visibleMessages.value.length > 0 || hasStreaming.value)
+})
+
+function distanceFromBottom() {
+  const el = listRef.value
+  if (!el) return 0
+  return Math.max(0, el.scrollHeight - el.clientHeight - el.scrollTop)
+}
+
+function handleScroll() {
+  const atBottom = distanceFromBottom() <= BOTTOM_EPSILON
+  isAtBottom.value = atBottom
+  autoScrollEnabled.value = atBottom
+}
+
+function pauseAutoScroll() {
+  autoScrollEnabled.value = false
+  isAtBottom.value = false
+}
+
+function handleWheel(event) {
+  if (event.deltaY < 0) pauseAutoScroll()
+}
+
+function handleTouchStart(event) {
+  touchY = event.touches?.[0]?.clientY ?? null
+}
+
+function handleTouchMove(event) {
+  const currentY = event.touches?.[0]?.clientY
+  if (currentY == null || touchY == null) return
+  if (currentY > touchY + 2) pauseAutoScroll()
+  touchY = currentY
+}
+
+function scrollToBottom() {
+  const el = listRef.value
+  if (!el) return
+
+  el.scrollTop = el.scrollHeight
+  isAtBottom.value = true
+}
+
+function resumeAutoScroll() {
+  autoScrollEnabled.value = true
+  scrollToBottom()
+}
+
+function openImagePreview(image) {
+  if (!image?.url) return
+  previewedImage.value = image
+}
+
+function closeImagePreview() {
+  previewedImage.value = null
+}
+
+function handlePreviewKeydown(event) {
+  if (event.key === 'Escape' && previewedImage.value) {
+    closeImagePreview()
+  }
+}
+
+watch(previewedImage, (image, previousImage) => {
+  if (image && !previousImage) {
+    previousBodyOverflow = document.body.style.overflow
+    document.body.style.overflow = 'hidden'
+    previewLocksBody = true
+  } else if (!image && previousImage && previewLocksBody) {
+    document.body.style.overflow = previousBodyOverflow
+    previewLocksBody = false
+  }
+})
+
+onMounted(() => {
+  window.addEventListener('keydown', handlePreviewKeydown)
+})
+
+onBeforeUnmount(() => {
+  window.removeEventListener('keydown', handlePreviewKeydown)
+  if (previewLocksBody) {
+    document.body.style.overflow = previousBodyOverflow
+    previewLocksBody = false
+  }
+})
+
 watch(
-  () => [props.messages.length, props.streaming, props.streamingAttachments?.length],
+  () => {
+    const last = visibleMessages.value[visibleMessages.value.length - 1]
+    return [visibleMessages.value.length, last?.id, last?.role]
+  },
+  async () => {
+    const last = visibleMessages.value[visibleMessages.value.length - 1]
+    if (last?.role === 'user') {
+      autoScrollEnabled.value = true
+    }
+    await nextTick()
+    if (autoScrollEnabled.value) scrollToBottom()
+  }
+)
+
+watch(
+  () => [props.streaming, props.streamingAttachments?.length, props.sending],
   async () => {
     await nextTick()
-    if (listRef.value) {
+    if (autoScrollEnabled.value) scrollToBottom()
-      listRef.value.scrollTop = listRef.value.scrollHeight
+  }
-    }
+)
+
+watch(
+  () => props.loading,
+  async (loading, previousLoading) => {
+    if (loading || !previousLoading) return
+    autoScrollEnabled.value = true
+    await nextTick()
+    scrollToBottom()
   }
 )
 </script>
 
 <style scoped>
-.message-list {
+.message-list-shell {
+  position: relative;
   flex: 1;
+  min-height: 0;
+}
+
+.message-list {
+  width: 100%;
+  height: 100%;
   overflow-y: auto;
-  padding: 24px 16px;
+  overscroll-behavior: contain;
+  padding: 24px 24px 18px;
+}
+
+.scroll-bottom-btn {
+  position: absolute;
+  left: 50%;
+  bottom: 12px;
+  z-index: 12;
+  min-height: 38px;
+  padding: 0 14px;
+  border: 1px solid var(--border-strong);
+  border-radius: 999px;
+  background: rgba(255, 255, 255, 0.96);
+  box-shadow: 0 10px 30px rgba(38, 59, 92, 0.14);
+  color: var(--text-secondary);
+  display: inline-flex;
+  align-items: center;
+  gap: 7px;
+  font-size: 12px;
+  font-weight: 600;
+  transform: translateX(-50%);
+  backdrop-filter: blur(10px);
+  transition: color 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease, transform 0.16s ease;
+}
+
+.scroll-bottom-btn:hover {
+  color: var(--accent);
+  border-color: rgba(45, 102, 218, 0.32);
+  box-shadow: 0 12px 34px rgba(38, 59, 92, 0.18);
+  transform: translateX(-50%) translateY(-1px);
+}
+
+.scroll-bottom-btn:active {
+  transform: translateX(-50%) scale(0.97);
+}
+
+.scroll-button-enter-active,
+.scroll-button-leave-active {
+  transition: opacity 0.18s ease, transform 0.18s ease;
+}
+
+.scroll-button-enter-from,
+.scroll-button-leave-to {
+  opacity: 0;
+  transform: translateX(-50%) translateY(7px);
+}
+
+.image-preview-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 1000;
+  display: grid;
+  grid-template-rows: minmax(0, 1fr) auto;
+  padding: 58px 28px 22px;
+  background: rgba(12, 19, 31, 0.88);
+  backdrop-filter: blur(14px);
+}
+
+.image-preview-stage {
+  display: flex;
+  min-width: 0;
+  min-height: 0;
+  align-items: center;
+  justify-content: center;
+}
+
+.image-preview-full {
+  display: block;
+  width: auto;
+  height: auto;
+  max-width: 94vw;
+  max-height: calc(100vh - 112px);
+  border-radius: 14px;
+  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
+  object-fit: contain;
+  user-select: none;
+}
+
+.image-preview-close {
+  position: fixed;
+  top: 18px;
+  right: 20px;
+  z-index: 1;
+  width: 40px;
+  height: 40px;
+  border: 1px solid rgba(255, 255, 255, 0.24);
+  border-radius: 12px;
+  background: rgba(255, 255, 255, 0.12);
+  color: #fff;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  backdrop-filter: blur(10px);
+  transition: background 0.16s ease, transform 0.16s ease;
+}
+
+.image-preview-close:hover,
+.image-preview-close:focus-visible {
+  background: rgba(255, 255, 255, 0.22);
+}
+
+.image-preview-close:active {
+  transform: scale(0.95);
+}
+
+.image-preview-caption {
+  max-width: min(80vw, 720px);
+  margin: 14px auto 0;
+  overflow: hidden;
+  color: rgba(255, 255, 255, 0.78);
+  font-size: 12px;
+  line-height: 1.4;
+  text-align: center;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.image-preview-enter-active,
+.image-preview-leave-active {
+  transition: opacity 0.2s ease;
+}
+
+.image-preview-enter-active .image-preview-full,
+.image-preview-leave-active .image-preview-full {
+  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
+}
+
+.image-preview-enter-from,
+.image-preview-leave-to {
+  opacity: 0;
+}
+
+.image-preview-enter-from .image-preview-full,
+.image-preview-leave-to .image-preview-full {
+  opacity: 0;
+  transform: scale(0.96);
 }
 
 .welcome {
   display: flex;
-  flex-direction: column;
   align-items: center;
   justify-content: center;
-  height: 100%;
+  min-height: 100%;
+}
+
+.welcome-panel {
+  width: min(100%, 620px);
+  padding: 24px 18px 30px;
   text-align: center;
-  color: var(--text-secondary);
+  animation: welcome-in 0.45s cubic-bezier(0.16, 1, 0.3, 1) both;
 }
 
 .welcome-icon {
-  font-size: 64px;
+  width: 52px;
-  margin-bottom: 16px;
+  height: 52px;
+  margin: 0 auto 18px;
+  border-radius: 16px;
+  background: #fff;
+  border: 1px solid var(--border-strong);
+  color: var(--accent);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  box-shadow: 0 10px 28px rgba(38, 59, 92, 0.08);
 }
 
 .welcome h2 {
-  font-size: 24px;
+  margin-bottom: 10px;
   color: var(--text-primary);
-  margin-bottom: 8px;
+  font-size: clamp(23px, 2.4vw, 28px);
+  font-weight: 680;
+  letter-spacing: -0.035em;
+  line-height: 1.28;
 }
 
 .welcome p {
+  max-width: 460px;
+  margin: 0 auto;
+  color: var(--text-secondary);
   font-size: 14px;
+  line-height: 1.65;
 }
 
 .loading-state {
-  text-align: center;
+  width: min(100%, 680px);
-  padding: 24px;
+  margin: 28px auto;
-  color: var(--text-muted);
+  padding: 18px 0;
+}
+
+.loading-state span {
+  display: block;
+  height: 12px;
+  margin-bottom: 10px;
+  border-radius: 6px;
+  background: #e8edf3;
+  animation: skeleton-pulse 1.2s ease-in-out infinite;
+}
+
+.loading-state span:nth-child(1) {
+  width: 68%;
+}
+
+.loading-state span:nth-child(2) {
+  width: 88%;
+}
+
+.loading-state span:nth-child(3) {
+  width: 52%;
 }
 
 .typing-indicator {
   display: flex;
   gap: 4px;
-  padding: 16px 24px;
+  max-width: var(--input-max-width);
+  margin: 0 auto;
+  padding: 12px 40px;
 }
 
 .typing-indicator span {
-  width: 8px;
+  width: 7px;
-  height: 8px;
+  height: 7px;
-  background: var(--text-muted);
+  background: #aab5c4;
   border-radius: 50%;
-  animation: bounce 1.4s infinite ease-in-out both;
+  animation: bounce 1.2s infinite ease-in-out both;
+}
+
+.typing-indicator span:nth-child(1) {
+  animation-delay: -0.24s;
+}
+
+.typing-indicator span:nth-child(2) {
+  animation-delay: -0.12s;
+}
+
+@keyframes welcome-in {
+  from { opacity: 0; transform: translateY(8px); }
+  to { opacity: 1; transform: translateY(0); }
+}
+
+@keyframes skeleton-pulse {
+  0%, 100% { opacity: 0.55; }
+  50% { opacity: 1; }
 }
-.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
-.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }
 
 @keyframes bounce {
-  0%, 80%, 100% { transform: scale(0); }
+  0%, 80%, 100% { transform: scale(0.65); opacity: 0.45; }
-  40% { transform: scale(1); }
+  40% { transform: scale(1); opacity: 1; }
+}
+
+@media (max-width: 768px) {
+  .message-list {
+    padding: 14px 12px 10px;
+  }
+
+  .scroll-bottom-btn {
+    bottom: 8px;
+    min-height: 36px;
+    padding: 0 12px;
+  }
+
+  .welcome-panel {
+    padding: 18px 10px 24px;
+  }
+
+  .welcome-icon {
+    width: 48px;
+    height: 48px;
+    margin-bottom: 16px;
+    border-radius: 15px;
+  }
+
+  .welcome h2 {
+    max-width: 330px;
+    margin-right: auto;
+    margin-left: auto;
+    font-size: 23px;
+    line-height: 1.3;
+  }
+
+  .welcome p {
+    max-width: 310px;
+    font-size: 13px;
+  }
+
+  .image-preview-overlay {
+    padding: 54px 12px 16px;
+  }
+
+  .image-preview-full {
+    max-width: calc(100vw - 24px);
+    max-height: calc(100vh - 100px);
+    border-radius: 10px;
+  }
+
+  .image-preview-close {
+    top: 12px;
+    right: 12px;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .scroll-bottom-btn,
+  .image-preview-overlay,
+  .image-preview-full,
+  .image-preview-close,
+  .welcome-panel,
+  .loading-state span,
+  .typing-indicator span {
+    animation: none;
+  }
 }
 </style>

frontend/src/components/NotificationCenter.vue

@@ -0,0 +1,292 @@
+<template>
+  <Teleport to="body">
+    <section class="notification-region" aria-label="系统通知" aria-live="assertive">
+      <TransitionGroup name="notification">
+        <article
+          v-for="item in notification.notifications"
+          :key="item.id"
+          class="notification-card"
+          :class="`notification-${item.type}`"
+          role="alert"
+        >
+          <div class="notification-icon" aria-hidden="true">
+            <IconAlertTriangle :size="20" :stroke-width="1.8" />
+          </div>
+
+          <div class="notification-content">
+            <div class="notification-heading">
+              <strong>{{ item.title }}</strong>
+              <button
+                class="notification-close"
+                type="button"
+                aria-label="关闭提示"
+                @click="notification.dismiss(item.id)"
+              >
+                <IconX :size="17" :stroke-width="1.8" />
+              </button>
+            </div>
+
+            <p>{{ item.message }}</p>
+
+            <details v-if="item.detail" class="notification-detail">
+              <summary>
+                <span>查看技术详情</span>
+                <IconChevronDown class="detail-chevron" :size="16" :stroke-width="1.8" />
+              </summary>
+              <div class="detail-body">
+                <pre>{{ item.detail }}</pre>
+                <button class="copy-detail" type="button" @click="copyDetail(item)">
+                  <IconCheck v-if="copiedId === item.id" :size="15" :stroke-width="1.8" />
+                  <IconCopy v-else :size="15" :stroke-width="1.8" />
+                  {{ copiedId === item.id ? '已复制' : '复制详情' }}
+                </button>
+              </div>
+            </details>
+          </div>
+        </article>
+      </TransitionGroup>
+    </section>
+  </Teleport>
+</template>
+
+<script setup>
+import { ref } from 'vue'
+import IconAlertTriangle from '@tabler/icons-vue/dist/esm/icons/IconAlertTriangle.mjs'
+import IconCheck from '@tabler/icons-vue/dist/esm/icons/IconCheck.mjs'
+import IconChevronDown from '@tabler/icons-vue/dist/esm/icons/IconChevronDown.mjs'
+import IconCopy from '@tabler/icons-vue/dist/esm/icons/IconCopy.mjs'
+import IconX from '@tabler/icons-vue/dist/esm/icons/IconX.mjs'
+import { useNotificationStore } from '@/stores/notification'
+
+const notification = useNotificationStore()
+const copiedId = ref(null)
+let copiedTimer = null
+
+async function copyDetail(item) {
+  try {
+    await navigator.clipboard.writeText(item.detail)
+    copiedId.value = item.id
+    if (copiedTimer) clearTimeout(copiedTimer)
+    copiedTimer = setTimeout(() => {
+      copiedId.value = null
+    }, 1800)
+  } catch {
+    copiedId.value = null
+  }
+}
+</script>
+
+<style scoped>
+.notification-region {
+  position: fixed;
+  top: 16px;
+  right: 16px;
+  z-index: 120;
+  display: flex;
+  width: min(420px, calc(100vw - 32px));
+  flex-direction: column;
+  gap: 10px;
+  pointer-events: none;
+}
+
+.notification-card {
+  position: relative;
+  display: grid;
+  grid-template-columns: 38px minmax(0, 1fr);
+  gap: 12px;
+  overflow: hidden;
+  padding: 14px;
+  background: rgba(255, 255, 255, 0.98);
+  border: 1px solid var(--border-strong);
+  border-radius: 16px;
+  box-shadow: 0 18px 48px rgba(38, 59, 92, 0.16);
+  pointer-events: auto;
+}
+
+.notification-card::before {
+  content: '';
+  position: absolute;
+  inset: 0 auto 0 0;
+  width: 3px;
+  background: var(--danger);
+}
+
+.notification-icon {
+  width: 38px;
+  height: 38px;
+  border-radius: 12px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: #fff0f0;
+  color: var(--danger);
+}
+
+.notification-content {
+  min-width: 0;
+}
+
+.notification-heading {
+  display: flex;
+  min-height: 28px;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 10px;
+}
+
+.notification-heading strong {
+  padding-top: 2px;
+  color: var(--text-primary);
+  font-size: 15px;
+  font-weight: 650;
+  line-height: 1.4;
+}
+
+.notification-close {
+  width: 28px;
+  height: 28px;
+  margin: -3px -4px 0 0;
+  border-radius: 50%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: var(--text-muted);
+  flex-shrink: 0;
+  transition: background 0.16s ease, color 0.16s ease, transform 0.16s ease;
+}
+
+.notification-close:hover {
+  background: var(--bg-soft);
+  color: var(--text-primary);
+}
+
+.notification-close:active,
+.copy-detail:active {
+  transform: scale(0.96);
+}
+
+.notification-content > p {
+  max-width: 36em;
+  color: var(--text-secondary);
+  font-size: 13px;
+  line-height: 1.65;
+  text-wrap: pretty;
+}
+
+.notification-detail {
+  margin-top: 10px;
+  border-top: 1px solid var(--border);
+}
+
+.notification-detail summary {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  padding: 10px 0 1px;
+  color: var(--text-secondary);
+  font-size: 12px;
+  font-weight: 550;
+  cursor: pointer;
+  list-style: none;
+  user-select: none;
+}
+
+.notification-detail summary::-webkit-details-marker {
+  display: none;
+}
+
+.detail-chevron {
+  transition: transform 0.18s ease;
+}
+
+.notification-detail[open] .detail-chevron {
+  transform: rotate(180deg);
+}
+
+.detail-body {
+  margin-top: 8px;
+  padding: 10px;
+  background: #f6f8fb;
+  border: 1px solid var(--border);
+  border-radius: 10px;
+}
+
+.detail-body pre {
+  max-height: 190px;
+  overflow: auto;
+  color: #354258;
+  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
+  font-size: 11px;
+  line-height: 1.55;
+  white-space: pre-wrap;
+  overflow-wrap: anywhere;
+}
+
+.copy-detail {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  min-height: 30px;
+  margin-top: 9px;
+  padding: 0 9px;
+  background: #fff;
+  border: 1px solid var(--border-strong);
+  border-radius: 8px;
+  color: var(--text-secondary);
+  font-size: 11px;
+  transition: background 0.16s ease, color 0.16s ease, transform 0.16s ease;
+}
+
+.copy-detail:hover {
+  background: var(--bg-soft);
+  color: var(--text-primary);
+}
+
+.notification-enter-active,
+.notification-leave-active {
+  transition: opacity 0.22s ease, transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
+}
+
+.notification-enter-from,
+.notification-leave-to {
+  opacity: 0;
+  transform: translateY(-8px) scale(0.98);
+}
+
+@media (max-width: 768px) {
+  .notification-region {
+    top: calc(10px + env(safe-area-inset-top));
+    right: 10px;
+    left: 10px;
+    width: auto;
+  }
+
+  .notification-card {
+    grid-template-columns: 34px minmax(0, 1fr);
+    gap: 10px;
+    padding: 12px;
+    border-radius: 14px;
+  }
+
+  .notification-icon {
+    width: 34px;
+    height: 34px;
+    border-radius: 10px;
+  }
+
+  .detail-body pre {
+    max-height: min(220px, 36dvh);
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .notification-enter-active,
+  .notification-leave-active,
+  .notification-close,
+  .copy-detail,
+  .detail-chevron {
+    transition: none;
+  }
+}
+</style>

frontend/src/router/index.js

@@ -39,7 +39,7 @@ router.beforeEach(async (to, from, next) => {
     return
   }
 
-  if (to.meta.guest && auth.isLoggedIn) {
+  if (to.meta.guest && auth.isLoggedIn && !auth.isGuest) {
     next({ name: 'Chat' })
     return
   }

frontend/src/stores/auth.js

@@ -1,6 +1,7 @@
 import { defineStore } from 'pinia'
 import { ref, computed } from 'vue'
 import api from '@/api'
+import { getOrCreateGuestKey } from '@/utils/guestSession'
 
 export const useAuthStore = defineStore('auth', () => {
   const token = ref(localStorage.getItem('token') || '')
@@ -8,32 +9,49 @@ export const useAuthStore = defineStore('auth', () => {
   const initialized = ref(false)
 
   const isLoggedIn = computed(() => !!token.value && !!user.value)
+  const isGuest = computed(() => !!user.value?.is_guest)
+
+  function setSession(data, type) {
+    token.value = data.token
+    user.value = data.user
+    localStorage.setItem('token', token.value)
+    localStorage.setItem('auth_type', type)
+  }
+
+  async function enterGuestMode() {
+    const res = await api.post('/auth/guest', { guest_key: getOrCreateGuestKey() })
+    setSession(res.data.data, 'guest')
+    return res.data
+  }
 
   async function init() {
-    if (token.value) {
+    try {
-      try {
+      if (token.value) {
         const res = await api.get('/auth/me')
         user.value = res.data.data
-      } catch {
+        localStorage.setItem('auth_type', user.value?.is_guest ? 'guest' : 'account')
-        logout()
       }
+
+      if (!user.value) {
+        await enterGuestMode()
+      }
+    } catch {
+      logout()
+      await enterGuestMode()
+    } finally {
+      initialized.value = true
     }
-    initialized.value = true
   }
 
   async function login(account, password) {
     const res = await api.post('/auth/login', { account, password })
-    token.value = res.data.data.token
+    setSession(res.data.data, 'account')
-    user.value = res.data.data.user
-    localStorage.setItem('token', token.value)
     return res.data
   }
 
   async function register(username, email, password) {
     const res = await api.post('/auth/register', { username, email, password })
-    token.value = res.data.data.token
+    setSession(res.data.data, 'account')
-    user.value = res.data.data.user
-    localStorage.setItem('token', token.value)
     return res.data
   }
 
@@ -41,7 +59,8 @@ export const useAuthStore = defineStore('auth', () => {
     token.value = ''
     user.value = null
     localStorage.removeItem('token')
+    localStorage.removeItem('auth_type')
   }
 
-  return { token, user, initialized, isLoggedIn, init, login, register, logout }
+  return { token, user, initialized, isLoggedIn, isGuest, init, enterGuestMode, login, register, logout }
 })

frontend/src/stores/chat.js

@@ -55,6 +55,7 @@ export const useChatStore = defineStore('chat', () => {
   const sidebarOpen = ref(false)
   /** 侧边栏当前选中的模型，发送/新建会话都会使用它 */
   const selectedModelId = ref(null)
+  const selectedAgentId = ref(localStorage.getItem('selected_agent_id') || null)
 
   let pendingPollTimer = null
   let pendingPollInFlight = false
@@ -183,36 +184,53 @@ export const useChatStore = defineStore('chat', () => {
     }
   }
 
-  async function sendMessage(content, attachments = []) {
+  function setSelectedAgent(agentId) {
-    if (!currentId.value) {
+    selectedAgentId.value = agentId || null
-      await createConversation(selectedModelId.value)
+    if (selectedAgentId.value) {
-    } else if (selectedModelId.value != null) {
+      localStorage.setItem('selected_agent_id', selectedAgentId.value)
-      // 发送前确保当前会话已绑定侧边栏所选模型
+    } else {
-      const conv = conversations.value.find(c => c.id === currentId.value)
+      localStorage.removeItem('selected_agent_id')
-      if (conv && Number(conv.model_id) !== Number(selectedModelId.value)) {
-        await setSelectedModel(selectedModelId.value)
-      }
     }
+  }
+
+  async function sendMessage(content, attachments = [], agentId = selectedAgentId.value, options = {}) {
+    if (sending.value) return
 
-    const userMsg = {
-      id: Date.now(),
-      role: 'user',
-      content,
-      attachments,
-      created_at: new Date().toISOString()
-    }
-    messages.value.push(userMsg)
     sending.value = true
     streamingContent.value = ''
     streamingAttachments.value = []
+    let userMsg = null
 
     try {
-      await streamChat(content, attachments)
+      if (!currentId.value) {
+        await createConversation(selectedModelId.value)
+      } else if (selectedModelId.value != null) {
+        // 发送前确保当前会话已绑定侧边栏所选模型
+        const conv = conversations.value.find(c => c.id === currentId.value)
+        if (conv && Number(conv.model_id) !== Number(selectedModelId.value)) {
+          await setSelectedModel(selectedModelId.value)
+        }
+      }
+
+      userMsg = {
+        id: Date.now(),
+        role: 'user',
+        content,
+        attachments,
+        created_at: new Date().toISOString()
+      }
+      messages.value.push(userMsg)
+
+      await streamChat(content, attachments, agentId, options)
       await loadMessages()
     } catch (e) {
       // 连接断开/代理超时：任务可能已落库为 pending，先同步再决定是否抛错
-      messages.value = messages.value.filter(m => m.id !== userMsg.id)
+      const cancelled = e?.name === 'AbortError' || options.signal?.aborted
+      if (userMsg) {
+        messages.value = messages.value.filter(m => m.id !== userMsg.id)
+      }
       await loadMessages().catch(() => {})
+      if (cancelled) throw e
       if (hasPendingJobs(messages.value)) {
         startPendingJobPolling()
         return
@@ -225,7 +243,7 @@ export const useChatStore = defineStore('chat', () => {
     }
   }
 
-  async function streamChat(content, attachments) {
+  async function streamChat(content, attachments, agentId = null, options = {}) {
     const token = localStorage.getItem('token')
     const response = await fetch('/api/chat/completions', {
       method: 'POST',
@@ -233,10 +251,13 @@ export const useChatStore = defineStore('chat', () => {
         'Content-Type': 'application/json',
         Authorization: `Bearer ${token}`
       },
+      signal: options.signal,
       body: JSON.stringify({
         conversation_id: currentId.value,
         content,
         attachments,
+        agent_id: agentId || null,
+        image_tool: options.imageTool || null,
         stream: true
       })
     })
@@ -257,8 +278,47 @@ export const useChatStore = defineStore('chat', () => {
     const decoder = new TextDecoder()
     let buffer = ''
     let fullContent = ''
+    let receivedContent = ''
     let gotAttachments = false
     let pendingDone = false
+    let agentRenderVersion = 0
+    let agentRenderQueue = Promise.resolve()
+    const isAgentStream = !!agentId
+
+    const appendVisibleContent = (content) => {
+      if (!content) return
+      receivedContent += content
+
+      if (!isAgentStream) {
+        fullContent += content
+        streamingContent.value = fullContent
+        return
+      }
+
+      const version = agentRenderVersion
+      const characters = Array.from(content)
+      const frameCount = Math.min(10, Math.max(2, Math.ceil(characters.length / 8)))
+      const frameSize = Math.ceil(characters.length / frameCount)
+
+      agentRenderQueue = agentRenderQueue.then(async () => {
+        for (let index = 0; index < characters.length; index += frameSize) {
+          if (version !== agentRenderVersion) return
+          fullContent += characters.slice(index, index + frameSize).join('')
+          streamingContent.value = fullContent
+          if (index + frameSize < characters.length) {
+            await new Promise(resolve => setTimeout(resolve, 14))
+          }
+        }
+      })
+    }
+
+    const replaceVisibleContent = (content) => {
+      agentRenderVersion++
+      agentRenderQueue = Promise.resolve()
+      receivedContent = content
+      fullContent = content
+      streamingContent.value = content
+    }
 
     while (true) {
       const { done, value } = await reader.read()
@@ -274,6 +334,7 @@ export const useChatStore = defineStore('chat', () => {
         const { event, data } = parseSseBlock(block)
 
         if (event === 'error') {
+          agentRenderVersion++
           throw new Error(data?.message || 'AI 请求失败')
         }
 
@@ -287,8 +348,11 @@ export const useChatStore = defineStore('chat', () => {
         }
 
         if (event === 'message' && data?.content) {
-          fullContent += data.content
+          appendVisibleContent(data.content)
-          streamingContent.value = fullContent
+        }
+
+        if (event === 'replace' && typeof data?.content === 'string') {
+          replaceVisibleContent(data.content)
         }
 
         if (event === 'done') {
@@ -298,9 +362,8 @@ export const useChatStore = defineStore('chat', () => {
               streamingContent.value = data.content
             }
           }
-          if (data?.content && !fullContent) {
+          if (data?.content && !receivedContent) {
-            fullContent = data.content
+            appendVisibleContent(data.content)
-            streamingContent.value = fullContent
           }
           if (Array.isArray(data?.attachments) && data.attachments.length) {
             streamingAttachments.value = data.attachments
@@ -310,6 +373,8 @@ export const useChatStore = defineStore('chat', () => {
       }
     }
 
+    await agentRenderQueue
+
     if (pendingDone) {
       await loadMessages().catch(() => {})
       startPendingJobPolling()
@@ -350,10 +415,12 @@ export const useChatStore = defineStore('chat', () => {
     streamingAttachments,
     sidebarOpen,
     selectedModelId,
+    selectedAgentId,
     fetchConversations,
     createConversation,
     selectConversation,
     setSelectedModel,
+    setSelectedAgent,
     deleteConversation,
     sendMessage,
     loadMessages,

frontend/src/stores/notification.js

@@ -0,0 +1,45 @@
+import { defineStore } from 'pinia'
+import { ref } from 'vue'
+import { presentError } from '@/utils/errorPresentation'
+
+let nextId = 1
+
+export const useNotificationStore = defineStore('notification', () => {
+  const notifications = ref([])
+  const timers = new Map()
+
+  function dismiss(id) {
+    const timer = timers.get(id)
+    if (timer) clearTimeout(timer)
+    timers.delete(id)
+    notifications.value = notifications.value.filter(item => item.id !== id)
+  }
+
+  function show(payload) {
+    const id = nextId++
+    const item = {
+      id,
+      type: payload.type || 'error',
+      title: payload.title || '请求失败',
+      message: payload.message || '请求未能完成，请稍后重试。',
+      detail: payload.detail || ''
+    }
+
+    notifications.value = [...notifications.value.slice(-2), item]
+
+    if (payload.duration > 0) {
+      timers.set(id, setTimeout(() => dismiss(id), payload.duration))
+    }
+    return id
+  }
+
+  function error(errorValue, options = {}) {
+    return show({
+      type: 'error',
+      ...presentError(errorValue, options),
+      duration: options.duration ?? 0
+    })
+  }
+
+  return { notifications, show, error, dismiss }
+})

frontend/src/stores/settings.js

@@ -18,6 +18,7 @@ export const useSettingsStore = defineStore('settings', () => {
   const siteName = ref('AI Chat')
   const allowRegister = ref(true)
   const models = ref([])
+  const agents = ref([])
   const loaded = ref(false)
 
   async function loadPublic() {
@@ -34,5 +35,10 @@ export const useSettingsStore = defineStore('settings', () => {
     models.value = res.data.data
   }
 
-  return { features, siteName, allowRegister, models, loaded, loadPublic, loadModels }
+  async function loadAgents() {
+    const res = await api.get('/agents')
+    agents.value = res.data.data || []
+  }
+
+  return { features, siteName, allowRegister, models, agents, loaded, loadPublic, loadModels, loadAgents }
 })

frontend/src/utils/errorPresentation.js

@@ -0,0 +1,126 @@
+function toText(value) {
+  if (typeof value === 'string') return value.trim()
+  if (value == null) return ''
+  try {
+    return JSON.stringify(value)
+  } catch {
+    return String(value)
+  }
+}
+
+function extractRawError(error) {
+  if (typeof error === 'string') return error.trim()
+  return toText(
+    error?.response?.data?.message
+    || error?.response?.data?.error
+    || error?.detail
+    || error?.message
+    || error
+  ) || '请求未能完成'
+}
+
+function parseEmbeddedJson(raw) {
+  const start = raw.search(/[\[{]/)
+  if (start < 0) return { data: null, prefix: '', formatted: '' }
+
+  const candidate = raw.slice(start).trim()
+  try {
+    const data = JSON.parse(candidate)
+    const prefix = raw.slice(0, start).trim().replace(/[：:;；]+$/, '')
+    const formattedJson = JSON.stringify(data, null, 2)
+    return {
+      data,
+      prefix,
+      formatted: prefix ? `${prefix}\n\n${formattedJson}` : formattedJson
+    }
+  } catch {
+    return { data: null, prefix: '', formatted: '' }
+  }
+}
+
+function findDeviceValidation(value) {
+  if (Array.isArray(value)) {
+    for (const item of value) {
+      const match = findDeviceValidation(item)
+      if (match) return match
+    }
+    return null
+  }
+
+  if (!value || typeof value !== 'object') return null
+
+  const info = value.extra_info
+  if (info?.input_name === 'device') {
+    const options = Array.isArray(info.input_config?.[0]) ? info.input_config[0] : []
+    return {
+      received: toText(info.received_value),
+      options: options.map(toText).filter(Boolean)
+    }
+  }
+
+  for (const child of Object.values(value)) {
+    const match = findDeviceValidation(child)
+    if (match) return match
+  }
+  return null
+}
+
+function humanizeComfyError(raw, parsed) {
+  const device = findDeviceValidation(parsed)
+  if (device?.received) {
+    const allowed = device.options.length ? `，当前可用选项为 ${device.options.join('、')}` : ''
+    return `工作流请求使用设备 ${device.received}${allowed}。请修改 ComfyUI 的 device 节点配置后重试。`
+  }
+
+  if (/value_not_in_list|Prompt outputs failed validation/i.test(raw)) {
+    return '工作流参数没有通过 ComfyUI 校验，请检查对应节点、模型和设备配置后重试。'
+  }
+
+  if (/拒绝任务|execution error|执行失败/i.test(raw)) {
+    return 'ComfyUI 拒绝了本次生成任务，请检查工作流和节点配置后重试。'
+  }
+
+  return '图片生成服务暂时无法完成任务，请检查 ComfyUI 配置后重试。'
+}
+
+function defaultTitle(raw, status) {
+  if (/ComfyUI|Prompt outputs failed|value_not_in_list/i.test(raw)) return '图片生成失败'
+  if (status === 401) return '登录状态已失效'
+  if (status === 403) return '没有操作权限'
+  if (/network|Failed to fetch|ERR_NETWORK|连接失败/i.test(raw)) return '连接失败'
+  if (/timeout|超时/i.test(raw)) return '请求超时'
+  return '请求失败'
+}
+
+function defaultMessage(raw, status, parsed) {
+  if (/ComfyUI|Prompt outputs failed|value_not_in_list/i.test(raw)) {
+    return humanizeComfyError(raw, parsed)
+  }
+  if (status === 401) return '登录信息已过期，请重新登录。'
+  if (status === 403) return '当前账户没有执行此操作的权限。'
+  if (/network|Failed to fetch|ERR_NETWORK|连接失败/i.test(raw)) {
+    return '暂时无法连接服务，请检查网络或服务状态后重试。'
+  }
+  if (/timeout|超时/i.test(raw)) return '服务响应时间过长，请稍后重试。'
+
+  const beforeJson = raw.split(/[\[{]/, 1)[0].trim().replace(/[：:;；]+$/, '')
+  if (beforeJson && beforeJson.length <= 120) return beforeJson
+  if (raw.length <= 120) return raw
+  return '服务返回了异常信息，请稍后重试或查看技术详情。'
+}
+
+export function presentError(error, options = {}) {
+  const raw = extractRawError(error)
+  const status = error?.status || error?.response?.status || null
+  const embedded = parseEmbeddedJson(raw)
+  const isTechnical = raw.length > 140
+    || !!embedded.formatted
+    || /value_not_in_list|Prompt outputs failed|stack|traceback/i.test(raw)
+
+  return {
+    title: options.title || defaultTitle(raw, status),
+    message: options.message || defaultMessage(raw, status, embedded.data),
+    detail: options.detail ?? (isTechnical ? (embedded.formatted || raw) : ''),
+    status
+  }
+}

frontend/src/utils/guestSession.js

@@ -0,0 +1,17 @@
+const GUEST_KEY_STORAGE = 'guest_key'
+
+export function getGuestKey() {
+  const key = localStorage.getItem(GUEST_KEY_STORAGE) || ''
+  return /^[a-f0-9]{64}$/.test(key) ? key : ''
+}
+
+export function getOrCreateGuestKey() {
+  const existing = getGuestKey()
+  if (existing) return existing
+
+  const bytes = new Uint8Array(32)
+  crypto.getRandomValues(bytes)
+  const key = Array.from(bytes, byte => byte.toString(16).padStart(2, '0')).join('')
+  localStorage.setItem(GUEST_KEY_STORAGE, key)
+  return key
+}

frontend/src/views/ChatView.vue

@@ -10,20 +10,35 @@
 
     <main class="chat-main">
       <header class="chat-header">
-        <button class="menu-btn" @click="chat.toggleSidebar">
+        <button class="menu-btn" type="button" aria-label="打开会话列表" @click="chat.toggleSidebar">
-          <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+          <IconMenu2 :size="21" :stroke-width="1.8" />
-            <path d="M3 12h18M3 6h18M3 18h18"/>
-          </svg>
         </button>
-        <h2 class="chat-title">{{ currentTitle }}</h2>
+        <div class="chat-heading">
+          <span class="chat-kicker">AI 创作空间</span>
+          <h2 class="chat-title">{{ currentTitle }}</h2>
+        </div>
         <div class="header-actions">
           <a
             v-if="auth.user?.role === 'admin'"
             :href="adminUrl"
             target="_blank"
+            rel="noopener"
             class="btn btn-ghost btn-sm admin-link"
-          >管理后台</a>
+            aria-label="打开管理后台"
-          <button class="btn btn-ghost btn-sm" @click="handleLogout">退出</button>
+          >
+            <IconSettings :size="17" :stroke-width="1.8" />
+            <span class="action-label">后台</span>
+          </a>
+          <button
+            class="btn btn-ghost btn-sm"
+            type="button"
+            :aria-label="auth.isGuest ? '登录账户' : '退出登录'"
+            @click="handleAccountAction"
+          >
+            <IconLogin v-if="auth.isGuest" :size="17" :stroke-width="1.8" />
+            <IconLogout v-else :size="17" :stroke-width="1.8" />
+            <span class="action-label">{{ auth.isGuest ? '登录' : '退出' }}</span>
+          </button>
         </div>
       </header>
 
@@ -45,14 +60,20 @@ import { computed, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
 import { useAuthStore } from '@/stores/auth'
 import { useChatStore } from '@/stores/chat'
+import { useNotificationStore } from '@/stores/notification'
 import { useSettingsStore } from '@/stores/settings'
 import ChatSidebar from '@/components/ChatSidebar.vue'
 import MessageList from '@/components/MessageList.vue'
 import ChatInput from '@/components/ChatInput.vue'
+import IconLogout from '@tabler/icons-vue/dist/esm/icons/IconLogout.mjs'
+import IconLogin from '@tabler/icons-vue/dist/esm/icons/IconLogin.mjs'
+import IconMenu2 from '@tabler/icons-vue/dist/esm/icons/IconMenu2.mjs'
+import IconSettings from '@tabler/icons-vue/dist/esm/icons/IconSettings.mjs'
 
 const router = useRouter()
 const auth = useAuthStore()
 const chat = useChatStore()
+const notification = useNotificationStore()
 const settings = useSettingsStore()
 
 const currentTitle = computed(() => {
@@ -63,20 +84,29 @@ const currentTitle = computed(() => {
 const adminUrl = import.meta.env.VITE_ADMIN_URL || `${window.location.protocol}//${window.location.hostname}:5174`
 
 onMounted(async () => {
-  await settings.loadPublic()
+  try {
-  await settings.loadModels()
+    await settings.loadPublic()
-  await chat.fetchConversations()
+    await Promise.all([settings.loadModels(), settings.loadAgents()])
+    await chat.fetchConversations()
+  } catch (err) {
+    notification.error(err, { title: '页面加载失败' })
+  }
 })
 
-async function handleSend({ content, attachments }) {
+async function handleSend({ content, attachments, agentId }) {
   try {
-    await chat.sendMessage(content, attachments)
+    await chat.sendMessage(content, attachments, agentId)
   } catch (e) {
-    alert(e.message)
+    notification.error(e)
   }
 }
 
-function handleLogout() {
+function handleAccountAction() {
+  if (auth.isGuest) {
+    router.push('/login')
+    return
+  }
+
   auth.logout()
   router.push('/login')
 }
@@ -86,7 +116,9 @@ function handleLogout() {
 .chat-layout {
   display: flex;
   height: 100%;
+  min-height: 100dvh;
   overflow: hidden;
+  background: linear-gradient(180deg, #f8faff 0%, var(--bg-primary) 100%);
 }
 
 .chat-main {
@@ -94,33 +126,58 @@ function handleLogout() {
   display: flex;
   flex-direction: column;
   min-width: 0;
-  background: var(--bg-primary);
+  background: transparent;
 }
 
 .chat-header {
   display: flex;
   align-items: center;
-  gap: 12px;
+  gap: 10px;
   height: var(--header-height);
-  padding: 0 16px;
+  padding: 0 22px;
-  border-bottom: 1px solid var(--border);
+  border-bottom: 1px solid rgba(225, 231, 239, 0.92);
+  background: rgba(255, 255, 255, 0.86);
+  backdrop-filter: blur(14px);
   flex-shrink: 0;
 }
 
 .menu-btn {
   display: none;
-  padding: 8px;
+  width: 36px;
-  border-radius: 8px;
+  height: 36px;
+  align-items: center;
+  justify-content: center;
+  border-radius: 50%;
   color: var(--text-secondary);
+  transition: background 0.16s ease, color 0.16s ease, transform 0.16s ease;
 }
+
 .menu-btn:hover {
-  background: var(--bg-hover);
+  background: var(--bg-soft);
+  color: var(--text-primary);
+}
+
+.menu-btn:active {
+  transform: scale(0.96);
+}
+
+.chat-heading {
+  flex: 1;
+  min-width: 0;
+}
+
+.chat-kicker {
+  display: inline-block;
+  margin-bottom: 1px;
+  font-size: 10px;
+  letter-spacing: 0.04em;
+  color: var(--text-muted);
 }
 
 .chat-title {
-  flex: 1;
   font-size: 16px;
-  font-weight: 500;
+  font-weight: 650;
+  line-height: 1.25;
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
@@ -128,17 +185,47 @@ function handleLogout() {
 
 .header-actions {
   display: flex;
-  gap: 4px;
+  gap: 6px;
 }
 
 .btn-sm {
-  padding: 6px 12px;
+  min-height: 36px;
+  padding: 7px 12px;
   font-size: 13px;
 }
 
 @media (max-width: 768px) {
+  .chat-header {
+    padding: 0 10px 0 8px;
+  }
+
   .menu-btn {
     display: flex;
   }
+
+  .chat-kicker {
+    display: none;
+  }
+
+  .chat-title {
+    font-size: 17px;
+  }
+
+  .btn-sm {
+    width: 36px;
+    min-height: 36px;
+    padding: 0;
+    border-radius: 50%;
+  }
+
+  .action-label {
+    display: none;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .menu-btn {
+    transition: none;
+  }
 }
 </style>

package.json

@@ -8,6 +8,12 @@
     "build:member": "npm --prefix frontend run build",
     "build:admin": "npm --prefix frontend-admin run build",
     "deploy:static": "node scripts/deploy-static.js",
+    "test:agent:100": "php backend/tests/agent_100_round_regression.php",
+    "test:llm:100": "php backend/tests/llm_100_round_regression.php",
+    "test:image:regression": "php backend/tests/comfy_image_edit_regression.php",
+    "test:image:integration": "php backend/tests/comfy_image_edit_integration.php",
+    "test:stability:1000": "powershell -ExecutionPolicy Bypass -File scripts/run-stability-suite.ps1",
+    "test:conversation:3000": "powershell -NoProfile -ExecutionPolicy Bypass -File scripts/run-conversation-adversarial.ps1 -Rounds 3000",
     "preview:member": "npm --prefix frontend run preview",
     "preview:admin": "npm --prefix frontend-admin run preview"
   }

scripts/run-conversation-adversarial.ps1

@@ -0,0 +1,56 @@
+param(
+  [ValidateScript({ $_ -ge 100 -and $_ % 100 -eq 0 })]
+  [int]$Rounds = 3000
+)
+
+$ErrorActionPreference = "Stop"
+$utf8Encoding = New-Object System.Text.UTF8Encoding($false)
+[Console]::OutputEncoding = $utf8Encoding
+$OutputEncoding = $utf8Encoding
+
+$mutex = New-Object System.Threading.Mutex($false, "Local\AiChat-Conversation-Adversarial")
+$ownsMutex = $false
+
+try {
+  try {
+    $ownsMutex = $mutex.WaitOne(0)
+  } catch [System.Threading.AbandonedMutexException] {
+    $ownsMutex = $true
+  }
+
+  if (!$ownsMutex) {
+    Write-Host ">> Another conversation adversarial run is active; skipping overlap." -ForegroundColor Yellow
+    exit 0
+  }
+
+  $root = Split-Path -Parent $PSScriptRoot
+  $logRoot = Join-Path $root "logs\conversation"
+  if (!(Test-Path $logRoot)) {
+    New-Item -ItemType Directory -Path $logRoot -Force | Out-Null
+  }
+
+  $timestamp = Get-Date -Format "yyyyMMdd-HHmmss"
+  $logFile = Join-Path $logRoot "conversation-adversarial-$timestamp.log"
+  $summaryFile = Join-Path $logRoot "conversation-adversarial-$timestamp.summary.json"
+  $testScript = Join-Path $root "backend\tests\conversation_adversarial_regression.php"
+
+  Write-Host ">> Running $Rounds adversarial conversation rounds" -ForegroundColor Cyan
+  & php $testScript $Rounds $summaryFile 2>&1 | ForEach-Object {
+    $line = [string]$_
+    Write-Host $line
+    Add-Content -Path $logFile -Value $line -Encoding UTF8
+  }
+  $exitCode = $LASTEXITCODE
+
+  if ($exitCode -ne 0) {
+    Write-Error "Conversation adversarial test failed with exit code $exitCode. Log: $logFile"
+    exit $exitCode
+  }
+
+  Write-Host ">> Conversation adversarial test passed. Log: $logFile" -ForegroundColor Green
+} finally {
+  if ($ownsMutex) {
+    $mutex.ReleaseMutex()
+  }
+  $mutex.Dispose()
+}

scripts/run-stability-suite.ps1

@@ -0,0 +1,87 @@
+param(
+  [ValidateRange(1, 1000000)]
+  [int]$Rounds = 1000
+)
+
+$ErrorActionPreference = "Stop"
+$utf8Encoding = New-Object System.Text.UTF8Encoding($false)
+[Console]::OutputEncoding = $utf8Encoding
+$OutputEncoding = $utf8Encoding
+
+$mutex = New-Object System.Threading.Mutex($false, "Local\AiChat-Stability-Suite")
+$ownsMutex = $false
+try {
+  try {
+    $ownsMutex = $mutex.WaitOne(0)
+  } catch [System.Threading.AbandonedMutexException] {
+    $ownsMutex = $true
+  }
+
+  if (!$ownsMutex) {
+    Write-Host ">> Another stability run is already active; skipping this overlapping run." -ForegroundColor Yellow
+    exit 0
+  }
+
+$root = Split-Path -Parent $PSScriptRoot
+$logRoot = Join-Path $root "logs\stability"
+if (!(Test-Path $logRoot)) {
+  New-Item -ItemType Directory -Path $logRoot -Force | Out-Null
+}
+
+$timestamp = Get-Date -Format "yyyyMMdd-HHmmss"
+$logFile = Join-Path $logRoot "stability-$timestamp.log"
+$summaryFile = Join-Path $logRoot "stability-$timestamp.summary.json"
+
+function Invoke-StabilitySuite {
+  param(
+    [string]$SuiteName
+  )
+
+  $testScript = Join-Path $root "backend\tests\stability_1000_round.php"
+  Write-Host ">> Running $SuiteName suite ($Rounds rounds)" -ForegroundColor Cyan
+  Add-Content -Path $logFile -Value "===== $SuiteName =====" -Encoding UTF8
+
+  # Windows PowerShell wraps native stderr as ErrorRecord objects. With the
+  # script-wide Stop preference, a failing suite used to abort this runner
+  # before the exit code, remaining suites, and JSON summary were recorded.
+  $previousErrorActionPreference = $ErrorActionPreference
+  try {
+    $ErrorActionPreference = "Continue"
+    & php $testScript $Rounds $SuiteName 2>&1 | ForEach-Object {
+      $line = [string]$_
+      Write-Host $line
+      Add-Content -Path $logFile -Value $line -Encoding UTF8
+    }
+    $exitCode = $LASTEXITCODE
+  } finally {
+    $ErrorActionPreference = $previousErrorActionPreference
+  }
+  Add-Content -Path $logFile -Value "" -Encoding UTF8
+
+  return [PSCustomObject]@{
+    suite = $SuiteName
+    requestedRounds = $Rounds
+    exitCode = $exitCode
+    completedAt = (Get-Date).ToString("s")
+  }
+}
+
+$summary = @()
+foreach ($suite in @("agent", "image", "llm")) {
+  $summary += Invoke-StabilitySuite -SuiteName $suite
+}
+
+$summary | ConvertTo-Json -Depth 4 | Set-Content -Path $summaryFile -Encoding UTF8
+$failedSuites = @($summary | Where-Object { $_.exitCode -ne 0 })
+if ($failedSuites.Count -gt 0) {
+  Write-Error "Stability run failed in $($failedSuites.Count) suite(s). Log: $logFile"
+  exit 1
+}
+
+Write-Host ">> Stability suites completed. Log: $logFile" -ForegroundColor Green
+} finally {
+  if ($ownsMutex) {
+    $mutex.ReleaseMutex()
+  }
+  $mutex.Dispose()
+}