diff --git a/docs/superpowers/specs/2026-08-07-frontend-context-popover-theme-fix-design.md b/docs/superpowers/specs/2026-08-07-frontend-context-popover-theme-fix-design.md
new file mode 100644
index 0000000..8e6764b
--- /dev/null
+++ b/docs/superpowers/specs/2026-08-07-frontend-context-popover-theme-fix-design.md
@@ -0,0 +1,59 @@
+# Frontend 上下文窗口 popover 主题适配 — Design Spec
+
+**日期：** 2026-08-07
+**状态：** Approved
+**范围：** Bug 修复（CSS 变量 / Element Plus Teleport）
+
+## 背景
+
+`src/views/frontend/components/InputArea.vue` 中的"上下文窗口"指示器（`.context-indicator`）点击后弹出 `el-popover`，其中显示 token 使用量、阈值百分比等。当前问题是：该 popover 没有适配 frontend 的深 / 浅色主题。
+
+## 根因
+
+Element Plus 的 `el-popover` 默认 `teleported: true`（已确认，源码 `element-plus/es/components/tooltip/src/content.mjs`），弹出层被 Teleport 到 body 之外。
+
+`body[data-fe-theme="light"]` 只覆盖了 `--fe-*` 系列变量，未覆盖 Element Plus 内部用到的 `--el-bg-color-overlay`、`--el-border-color-lighter`、`--el-text-color-regular` 等。结果是：
+
+- popover 容器（`.el-popper`）回退到 Element Plus 默认值（浅色背景 + 浅色文本）
+- 在深色主题下，与 frontend 整体深色风格不一致
+- 而 `.context-popover` 内部的 `--fe-*` 变量虽然继承自 `:root`，但 popover 容器本身的背景 / 边框 / 文字色来自 `--el-*`，这些没被覆盖
+
+## 方案
+
+**给 `el-popover` 设置 `:teleported="false"`**，让 popover 容器保留在 `.frontend-container` DOM 树内，从而继承 `.frontend-container` 下的所有 `--el-*` / `--fe-*` 变量映射。
+
+### 改动点
+
+`src/views/frontend/components/InputArea.vue` 第 81-85 行的 `el-popover` 标签，新增 `:teleported="false"`：
+
+```vue
+<el-popover
+  placement="top"
+  :width="280"
+  trigger="click"
+  :teleported="false"
+>
+```
+
+`.context-popover` 现有的 scoped 样式（`.popover-title` / `.popover-body` / `.popover-footer` / `.token-count`）保持不变，因为它们使用 `--fe-*` 变量，本来就能工作。
+
+### 不需要改动
+
+- `theme.scss`：`.frontend-container` 已经把 `--el-bg-color-overlay`、`--el-text-color-regular`、`--el-color-success`、`--el-color-danger` 等都映射到 `--fe-*` 变量，只要 popover 在 `.frontend-container` 内就能自动生效
+- 浅色覆盖：`.frontend-container[data-theme="light"]` 同样完整覆盖了 `--el-*` 系列
+- `.context-popover` 的 scoped 样式：因为 `.context-popover` 本身在 InputArea 模板中，scoped 的 `data-v-xxx` 仍会附加到元素上，popover 留在组件树内后所有选择器自然匹配
+
+## 验证
+
+1. 切到深色主题，点击输入框右下角的"XX%"指示器 → popover 应为深色背景（`#252526` / `--fe-bg-elevated`）、浅色文字
+2. 切到浅色主题，点击同一指示器 → popover 应为白色（`#ffffff` / `--el-bg-color`）、深色文字
+3. 百分比 `el-tag`：深色主题下 `success` 是青色（`#4ec9b0`），`danger` 是珊瑚红（`#f48771`）；浅色主题下 `success` 是蓝色（`#1890ff`），`danger` 是红色（`#f56c6c`）
+4. `token-count` 文字：深色下青色，浅色下蓝色
+5. 重复点击 / 多次切换主题，popover 位置不漂移、不被聊天内容遮挡
+
+## 非目标
+
+- 不改 `el-popover` 的其它属性（placement、width、trigger）
+- 不改 `theme.scss`
+- 不改 `.context-popover` 现有样式（变量已经够用）
+- 不动 `el-tooltip`（左下角 `@` 按钮的 tooltip，独立组件，独立处理）
\ No newline at end of file
diff --git a/image.png b/image.png
deleted file mode 100644
index 703ae6b..0000000
Binary files a/image.png and /dev/null differ
diff --git a/src/assets/images/login-background.jpg b/src/assets/images/login-background.jpg
index 8a89eb8..7183dc2 100644
Binary files a/src/assets/images/login-background.jpg and b/src/assets/images/login-background.jpg differ
diff --git a/src/views/frontend/components/ChatHeader.vue b/src/views/frontend/components/ChatHeader.vue
index 27b10af..48d29cb 100644
--- a/src/views/frontend/components/ChatHeader.vue
+++ b/src/views/frontend/components/ChatHeader.vue
@@ -1,40 +1,49 @@
 <template>
   <div class="chat-header">
     <div class="header-left">
+      <div class="agent-avatar">{{ agentNameInitial }}</div>
       <span class="conversation-name">{{ agentName }}</span>
     </div>
     <div class="header-right">
-      <!-- 清空会话 -->
-      <el-button @click="emit('clear')">
-        清空会话
-      </el-button>
-      <!-- 模型选择 -->
-      <el-button @click="showModelModal = true">
-        {{ currentModel?.name || currentModel?.modelName || '选择模型' }}
-      </el-button>
-      <el-button
-        :type="activeTab === 'agent' ? 'primary' : 'default'"
-        @click="handleTabClick('agent')"
-      >
-        智能体
-      </el-button>
-      <el-button
-        :type="activeTab === 'file' ? 'primary' : 'default'"
-        @click="handleTabClick('file')"
-      >
-        文件
-      </el-button>
-    </div>
+      <el-tooltip content="清空会话" placement="bottom" :show-after="300">
+        <el-button class="icon-btn icon-btn--danger" link @click="emit('clear')">
+          <el-icon><Brush /></el-icon>
+        </el-button>
+      </el-tooltip>
 
-    <!-- 模型选择弹窗 -->
-    <LlmModelModal v-model="showModelModal" @select="handleModelSelect" />
+      <el-select
+        class="model-select"
+        :model-value="modelValue"
+        @update:model-value="handleSelectChange"
+        popper-class="frontend-el-select-dropdown"
+        placeholder="选择模型"
+      >
+        <el-option
+          v-for="opt in modelOptions"
+          :key="opt.value"
+          :label="opt.label"
+          :value="opt.value"
+        />
+      </el-select>
+
+      <el-tooltip
+        :content="filePanelVisible ? '收起文件面板' : '展开文件面板'"
+        placement="bottom"
+        :show-after="300"
+      >
+        <el-button class="icon-btn" link @click="handleToggleClick">
+          <el-icon>
+            <component :is="filePanelVisible ? Fold : Expand" />
+          </el-icon>
+        </el-button>
+      </el-tooltip>
+    </div>
   </div>
 </template>
 
 <script setup>
-import { ref } from 'vue'
-import { Cpu } from '@element-plus/icons-vue'
-import LlmModelModal from './LlmModelModal.vue'
+import { computed } from 'vue'
+import { Brush, Fold, Expand } from '@element-plus/icons-vue'
 
 const props = defineProps({
   agentName: {
@@ -44,26 +53,36 @@ const props = defineProps({
   currentModel: {
     type: Object,
     default: null
+  },
+  modelOptions: {
+    type: Array,
+    default: () => []
+  },
+  modelValue: {
+    type: String,
+    default: ''
+  },
+  filePanelVisible: {
+    type: Boolean,
+    default: true
   }
 })
 
-const activeTab = ref('agent')
-const showModelModal = ref(false)
+const emit = defineEmits(['clear', 'update:modelValue', 'toggle-file-panel'])
 
-const emit = defineEmits(['tab-change', 'model-change', 'clear'])
+const agentNameInitial = computed(() => {
+  const name = (props.agentName || '').trim()
+  if (!name) return '?'
+  // 中文取首字，英文取首字母
+  return [...name][0]
+})
 
-function handleTabClick(tab) {
-  activeTab.value = tab
-  emit('tab-change', tab)
+function handleSelectChange(value) {
+  emit('update:modelValue', value)
 }
 
-defineExpose({
-  setActiveTab: (tab) => {
-    activeTab.value = tab
-  }
-})
-function handleModelSelect(model) {
-  emit('model-change', model)
+function handleToggleClick() {
+  emit('toggle-file-panel')
 }
 </script>
 
@@ -78,8 +97,25 @@ function handleModelSelect(model) {
   color: var(--fe-text-primary);
 
   .header-left {
-    max-width: 400px;
-    overflow: hidden;
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    max-width: 480px;
+
+    .agent-avatar {
+      width: 32px;
+      height: 32px;
+      border-radius: 50%;
+      background: var(--fe-accent);
+      color: var(--fe-text-inverse);
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      font-size: 14px;
+      font-weight: 600;
+      flex-shrink: 0;
+    }
+
     .conversation-name {
       font-size: 16px;
       font-weight: 600;
@@ -93,6 +129,43 @@ function handleModelSelect(model) {
   .header-right {
     display: flex;
     gap: 8px;
+    align-items: center;
+
+    .icon-btn {
+      padding: 4px 8px;
+      background: transparent;
+      border: none;
+      color: var(--fe-text-secondary);
+      height: 32px;
+      width: 32px;
+      cursor: pointer;
+      border-radius: var(--fe-radius-md);
+      transition: all 0.2s;
+
+      &:hover {
+        background: var(--fe-bg-hover);
+        color: var(--fe-text-primary);
+      }
+
+      &--danger:hover {
+        color: var(--fe-danger);
+      }
+
+      .el-icon {
+        font-size: 18px;
+      }
+    }
+
+    .model-select {
+      width: 180px;
+      :deep(.el-select__wrapper) {
+        background: var(--fe-bg-elevated);
+        box-shadow: 0 0 0 1px var(--fe-border) inset;
+        border-radius: var(--fe-radius-md);
+      }
+      :deep(.el-select__placeholder) { color: var(--fe-text-muted); }
+      :deep(.el-select__selected-item) { color: var(--fe-text-primary); }
+    }
   }
 }
 </style>
diff --git a/src/views/frontend/components/ChatWindow.vue b/src/views/frontend/components/ChatWindow.vue
index 5ec2fc3..79d1a00 100644
--- a/src/views/frontend/components/ChatWindow.vue
+++ b/src/views/frontend/components/ChatWindow.vue
@@ -445,7 +445,7 @@ defineExpose({ scrollToBottom, forceScrollToBottom })
 .chat-window {
   position: relative;
   flex: 1;
-  padding: 16px 20px;
+  padding: 12px 16px;
   overflow: hidden;
   display: flex;
   flex-direction: column;
@@ -491,7 +491,7 @@ defineExpose({ scrollToBottom, forceScrollToBottom })
   }
 
   .message-group {
-    margin-bottom: 12px;
+    margin-bottom: 10px;
 
     &.user-group {
       display: flex;
@@ -501,7 +501,7 @@ defineExpose({ scrollToBottom, forceScrollToBottom })
       .message-bubble {
         background: var(--fe-bg-elevated);
         color: var(--fe-text-primary);
-        border-radius: 16px 16px 4px 16px;
+        border-radius: 10px 10px 4px 10px;
         box-shadow: var(--fe-shadow-sm);
         max-width: 70%;
 
@@ -530,15 +530,16 @@ defineExpose({ scrollToBottom, forceScrollToBottom })
       .message-bubble {
         background: var(--fe-bg-elevated);
         color: var(--fe-text-primary);
-        border-radius: 16px 16px 16px 4px;
+        border-radius: 10px 10px 10px 4px;
         box-shadow: var(--fe-shadow-sm);
         max-width: 70%;
       }
     }
 
     .message-bubble {
-      padding: 10px 14px;
+      padding: 9px 13px;
       line-height: 1.6;
+      border-radius: 10px;
 
       .message-text {
         margin: 0;
diff --git a/src/views/frontend/components/ConversationSidebar.vue b/src/views/frontend/components/ConversationSidebar.vue
index 867f343..2ff9de3 100644
--- a/src/views/frontend/components/ConversationSidebar.vue
+++ b/src/views/frontend/components/ConversationSidebar.vue
@@ -24,25 +24,46 @@
               </el-tooltip>
             </div>
           </div>
+          <div class="sidebar-search">
+            <el-input
+              v-model="searchKeyword"
+              placeholder="搜索会话"
+              :prefix-icon="Search"
+              clearable
+            />
+          </div>
           <el-scrollbar class="sidebar-scrollbar">
             <div v-if="loading && sessionList.length === 0" class="loading-tip">
               加载中...
             </div>
-            <div
-              v-for="session in sessionList"
-              :key="session.sessionId"
-              class="conversation-item"
-              :class="{ active: currentSession?.sessionId === session.sessionId, 'has-new-message': session.hasNewMessage }"
-              @click="selectSession(session)"
-              @contextmenu.prevent="handleRightClick($event, session)"
-            >
-              <div class="conv-dot"></div>
-              <div class="conv-info">
-                <span class="conv-name">{{ session.title || session.name }}</span>
-                <span class="conv-time">{{ formatTimeAgo(session.updateTime) }}</span>
-              </div>
-              <div v-if="session.hasNewMessage" class="new-message-dot"></div>
-            </div>
+            <template v-for="group in sessionGroups" :key="group.key">
+              <template v-if="group.items.length > 0">
+                <div class="group-header" @click="toggleGroup(group.key)">
+                  <span class="group-title">{{ group.label }}</span>
+                  <el-icon class="group-toggle">
+                    <ArrowDown v-if="expandedGroups.has(group.key)" />
+                    <ArrowRight v-else />
+                  </el-icon>
+                </div>
+                <div v-show="expandedGroups.has(group.key)" class="group-items">
+                  <div
+                    v-for="session in group.items"
+                    :key="session.sessionId"
+                    class="conversation-item"
+                    :class="{ active: currentSession?.sessionId === session.sessionId, 'has-new-message': session.hasNewMessage }"
+                    @click="selectSession(session)"
+                    @contextmenu.prevent="handleRightClick($event, session)"
+                  >
+                    <div class="conv-dot"></div>
+                    <div class="conv-info">
+                      <span class="conv-name">{{ session.title || session.name }}</span>
+                      <span class="conv-time">{{ formatTimeAgo(session.updateTime) }}</span>
+                    </div>
+                    <div v-if="session.hasNewMessage" class="new-message-dot"></div>
+                  </div>
+                </div>
+              </template>
+            </template>
 
             <!-- 右键菜单 -->
             <teleport to="body">
@@ -67,9 +88,9 @@
 </template>
 
 <script setup>
-import { ref, onMounted, onUnmounted } from 'vue'
+import { ref, computed, onMounted, onUnmounted } from 'vue'
 import { useRoute } from 'vue-router'
-import { DArrowLeft, DArrowRight, Refresh, Plus, Delete, Loading } from '@element-plus/icons-vue'
+import { DArrowLeft, DArrowRight, Refresh, Plus, Delete, Loading, Search, ArrowDown, ArrowRight } from '@element-plus/icons-vue'
 import { listChatSessions, deleteChatSession, renameChatSession } from '@/api/frontend'
 import { formatTimeAgo } from '@/utils/time'
 import { ElMessage, ElMessageBox } from 'element-plus'
@@ -82,6 +103,70 @@ const currentSession = ref(null)
 const loading = ref(false)
 const emit = defineEmits(['select', 'new-session', 'ready'])
 
+// —— 搜索关键字（仅样式占位，本次不绑定行为） ——
+const searchKeyword = ref('')
+
+// —— 分组折叠状态：'today' | 'yesterday' | 'earlier' ——
+const expandedGroups = ref(new Set())
+
+function parseTimestamp(t) {
+  if (!t) return null
+  if (typeof t === 'number' && String(t).length === 13) return t
+  if (typeof t === 'number' || /^\d{14}$/.test(t)) {
+    const s = String(t)
+    return new Date(`${s.slice(0,4)}-${s.slice(4,6)}-${s.slice(6,8)}T${s.slice(8,10)}:${s.slice(10,12)}:${s.slice(12,14)}`).getTime()
+  }
+  if (typeof t === 'string' && t.includes(' ')) {
+    const iso = t.replace(' ', 'T').replace(/\.(\d+)?$/, '')
+    const ms = new Date(iso).getTime()
+    return Number.isNaN(ms) ? null : ms
+  }
+  const ms = new Date(t).getTime()
+  return Number.isNaN(ms) ? null : ms
+}
+
+function groupOf(session) {
+  const ts = parseTimestamp(session?.updateTime)
+  if (ts == null) {
+    console.warn('[ConversationSidebar] 无法解析会话时间', session)
+    return 'earlier'
+  }
+  const now = new Date()
+  const d = new Date(ts)
+  const sameDay = (a, b) =>
+    a.getFullYear() === b.getFullYear() &&
+    a.getMonth() === b.getMonth() &&
+    a.getDate() === b.getDate()
+  const yesterday = new Date(now); yesterday.setDate(now.getDate() - 1)
+  if (sameDay(d, now)) return 'today'
+  if (sameDay(d, yesterday)) return 'yesterday'
+  return 'earlier'
+}
+
+const sessionGroups = computed(() => {
+  const groups = { today: [], yesterday: [], earlier: [] }
+  for (const s of sessionList.value) {
+    groups[groupOf(s)].push(s)
+  }
+  return [
+    { key: 'today', label: '今天', items: groups.today },
+    { key: 'yesterday', label: '昨天', items: groups.yesterday },
+    { key: 'earlier', label: '更早', items: groups.earlier }
+  ]
+})
+
+function toggleGroup(key) {
+  const next = new Set(expandedGroups.value)
+  if (next.has(key)) next.delete(key)
+  else next.add(key)
+  expandedGroups.value = next
+}
+
+function syncExpandedWithCurrent() {
+  // 用户要求默认全部展开；用户可点击分组标题手动收/展
+  expandedGroups.value = new Set(['today', 'yesterday', 'earlier'])
+}
+
 // 响应式：viewport ≤ 900px 收缩，> 900px 展开
 let sidebarMediaQuery = null
 const sidebarBreakpointHandler = (e) => {
@@ -148,6 +233,7 @@ function toggleSidebar() {
 function selectSession(session) {
   currentSession.value = session
   emit('select', session)
+  syncExpandedWithCurrent()
 }
 
 async function fetchSessions() {
@@ -169,6 +255,7 @@ async function fetchSessions() {
     const remain = 300 - elapsed
     if (remain > 0) await new Promise(resolve => setTimeout(resolve, remain))
     loading.value = false
+    syncExpandedWithCurrent()
     emit('ready')
   }
 }
@@ -201,6 +288,7 @@ async function handleDeleteSession(session) {
       currentSession.value = null
       emit('select', null)
     }
+    syncExpandedWithCurrent()
   } catch (error) {
     if (error !== 'cancel') {
       console.error('删除会话失败:', error)
@@ -352,6 +440,50 @@ defineExpose({
       }
     }
 
+    .sidebar-search {
+      padding: 8px 12px 0;
+      :deep(.el-input__wrapper) {
+        background: var(--fe-bg-elevated);
+        box-shadow: 0 0 0 1px var(--fe-border) inset;
+        border-radius: var(--fe-radius-md);
+        transition: box-shadow 0.15s, background 0.15s;
+      }
+      :deep(.el-input__wrapper.is-focus) {
+        box-shadow: 0 0 0 1px var(--fe-accent) inset;
+        background: var(--fe-bg-elevated);
+      }
+      :deep(.el-input__inner) {
+        color: var(--fe-text-primary);
+        &::placeholder { color: var(--fe-text-muted); }
+      }
+      :deep(.el-input__wrapper.is-focus .el-input__inner::placeholder) {
+        color: var(--fe-text-secondary);
+      }
+      :deep(.el-input__prefix .el-icon) { color: var(--fe-text-muted); }
+    }
+
+    .group-header {
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
+      padding: 12px 16px 6px;
+      cursor: pointer;
+      user-select: none;
+      .group-title {
+        font-size: 12px;
+        font-weight: 600;
+        color: var(--fe-accent);
+        letter-spacing: 0.5px;
+      }
+      .group-toggle {
+        color: var(--fe-text-secondary);
+        font-size: 12px;
+      }
+      &:hover .group-toggle { color: var(--fe-text-primary); }
+    }
+
+    .group-items { padding: 0 8px; }
+
     @keyframes sidebar-rotate {
       from { transform: rotate(0deg); }
       to { transform: rotate(360deg); }
@@ -378,7 +510,7 @@ defineExpose({
       align-items: center;
       gap: 10px;
       transition: all 0.2s;
-      border-radius: 8px;
+      border-radius: var(--fe-radius-md);
       color: var(--fe-text-primary);
       font-size: 14px;
 
diff --git a/src/views/frontend/components/FilePanel.vue b/src/views/frontend/components/FilePanel.vue
index 9418f8e..0e79295 100644
--- a/src/views/frontend/components/FilePanel.vue
+++ b/src/views/frontend/components/FilePanel.vue
@@ -790,6 +790,13 @@ function handleNodeClick(data) {
     overflow: hidden;
     position: relative;
 
+    // 浅色主题下 el-scrollbar 滚动区背景设白
+    :deep(.el-scrollbar__wrap) {
+      body[data-fe-theme="light"] & {
+        background: #ffffff;
+      }
+    }
+
     .loading-wrapper,
     .empty-wrapper {
       padding:20px;
diff --git a/src/views/frontend/index.vue b/src/views/frontend/index.vue
index c363222..cfddec6 100644
--- a/src/views/frontend/index.vue
+++ b/src/views/frontend/index.vue
@@ -11,11 +11,13 @@
     <div class="main-content">
       <!-- 顶部栏 -->
       <ChatHeader
-        ref="chatHeaderRef"
         :agent-name="currentConversation?.agentName || '请选择会话'"
         :current-model="currentModel"
-        @tab-change="handleTabChange"
-        @model-change="handleModelChange"
+        :model-options="modelSelectOptions"
+        :model-value="currentModel?.modelName || currentModel?.name || ''"
+        :file-panel-visible="filePanelVisible"
+        @update:model-value="handleModelSelectChange"
+        @toggle-file-panel="handleToggleFilePanel"
         @clear="handleClear"
       />
 
@@ -183,14 +185,13 @@ const chatWindowRef = ref();
 const inputAreaRef = ref();
 const conversationSidebarRef = ref();
 const editorTextareaRef = ref();
-const chatHeaderRef = ref();
 
 const currentConversation = ref(null);
 const messages = ref([]);
 const quotedFiles = ref([]);
 const loading = ref(false);
 const switchingConversation = ref(false);
-const filePanelVisible = ref(false);
+const filePanelVisible = ref(true);
 
 // 智能体市场跳转带来的 agentId
 const agentId = ref(null);
@@ -206,7 +207,6 @@ const activeWorkspacePath = computed(() => {
 // 模型相关
 const currentModel = ref(null);
 const modelList = ref([]);
-const showModelModal = ref(false);
 
 // 文件预览相关
 const previewVisible = ref(false);
@@ -307,6 +307,19 @@ async function loadAgentIfNeeded() {
   }
 }
 
+const modelSelectOptions = computed(() => modelList.value.map(m => ({
+  label: m.name || m.modelName || '',
+  value: m.modelName || m.name || ''
+})))
+
+function handleModelSelectChange(value) {
+  const found = modelList.value.find(m => (m.modelName || m.name) === value)
+  if (found) {
+    currentModel.value = found
+    ElMessage.success(`已选择模型: ${found.name || found.modelName}`)
+  }
+}
+
 // 初始化模型列表
 async function initModels() {
   try {
@@ -806,24 +819,13 @@ function transformMessages(rawMessages) {
   return result;
 }
 
-function handleTabChange(tab) {
-  if (tab === "agent") {
-    filePanelVisible.value = false;
-    previewVisible.value = false;
-  } else if (tab === "file") {
-    filePanelVisible.value = true;
-  }
-}
-
 function handleFilePanelClose() {
   filePanelVisible.value = false;
   previewVisible.value = false;
-  chatHeaderRef.value?.setActiveTab('agent');
 }
 
-function handleModelChange(model) {
-  currentModel.value = model;
-  ElMessage.success(`已选择模型: ${model.name || model.modelName || model.llmName}`);
+function handleToggleFilePanel() {
+  filePanelVisible.value = !filePanelVisible.value
 }
 
 function handleClear() {
diff --git a/src/views/frontend/styles/theme.scss b/src/views/frontend/styles/theme.scss
index 38d383f..b6c7a03 100644
--- a/src/views/frontend/styles/theme.scss
+++ b/src/views/frontend/styles/theme.scss
@@ -3,34 +3,34 @@
 // --fe- 前缀保证不会与 admin 主题变量冲突（admin 模块未使用 --fe-*）。
 :root {
   // —— 基础色 ——
-  --fe-bg-base: #1e1e1e;
-  --fe-bg-elevated: #252526;
-  --fe-bg-overlay: #2d2d30;
-  --fe-bg-input: #3c3c3c;
-  --fe-bg-hover: #2a2d2e;
+  --fe-bg-base: #14171c;
+  --fe-bg-elevated: #1c1f24;
+  --fe-bg-overlay: #23272e;
+  --fe-bg-input: #2a2e35;
+  --fe-bg-hover: #1f2329;
 
   // —— 边框 ——
-  --fe-border: #3c3c3c;
-  --fe-border-strong: #555555;
+  --fe-border: #2c3138;
+  --fe-border-strong: #4a505a;
 
   // —— 文本 ——
-  --fe-text-primary: #e6e6e6;
-  --fe-text-secondary: #a0a0a0;
-  --fe-text-muted: #6e6e6e;
-  --fe-text-inverse: #1e1e1e;
+  --fe-text-primary: #e4e6eb;
+  --fe-text-secondary: #9aa0a6;
+  --fe-text-muted: #6b7280;
+  --fe-text-inverse: #14171c;
 
   // —— 品牌色 ——
-  --fe-accent: #4ec9b0;
-  --fe-accent-hover: #5fd9c0;
-  --fe-accent-soft: rgba(78, 201, 176, 0.15);
-  --fe-danger: #f48771;
-  --fe-danger-soft: rgba(244, 135, 113, 0.1);
-  --fe-warning: #dcdcaa;
-  --fe-info: #569cd6;
-  --fe-info-soft: rgba(86, 156, 214, 0.1);
-  --fe-info-border: rgba(86, 156, 214, 0.4);
-  --fe-accent-border: rgba(78, 201, 176, 0.4);
-  --fe-danger-border: rgba(244, 135, 113, 0.4);
+  --fe-accent: #6c8cff;
+  --fe-accent-hover: #8aa3ff;
+  --fe-accent-soft: rgba(108, 140, 255, 0.15);
+  --fe-danger: #f07178;
+  --fe-danger-soft: rgba(240, 113, 120, 0.1);
+  --fe-warning: #e0a050;
+  --fe-info: #6cc4d6;
+  --fe-info-soft: rgba(108, 196, 214, 0.1);
+  --fe-info-border: rgba(108, 196, 214, 0.4);
+  --fe-accent-border: rgba(108, 140, 255, 0.4);
+  --fe-danger-border: rgba(240, 113, 120, 0.4);
 
   // —— 布局尺寸 ——
   --fe-sidebar-width: 260px;
@@ -41,9 +41,9 @@
   --fe-radius-sm: 4px;
   --fe-radius-md: 6px;
   --fe-radius-lg: 12px;
-  --fe-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
-  --fe-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
-  --fe-shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.5);
+  --fe-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
+  --fe-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.55);
+  --fe-shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.65);
 }
 
 // —— 浅色主题覆盖（通过 body[data-fe-theme="light"] 切换，由 settings.js 同步）——
@@ -215,6 +215,34 @@ body[data-fe-theme="light"] {
   }
 }
 
+// —— ElSelect 下拉面板（Teleport 到 body，需打 popper-class 标记）——
+// 在 ChatHeader 模型下拉里使用 popper-class="frontend-el-select-dropdown"，
+// 让弹出的 .el-select-dropdown 继承 frontend 主题。
+.frontend-el-select-dropdown {
+  --el-bg-color: var(--fe-bg-elevated);
+  --el-bg-color-overlay: var(--fe-bg-overlay);
+  --el-text-color-primary: var(--fe-text-primary);
+  --el-text-color-regular: var(--fe-text-secondary);
+  --el-text-color-secondary: var(--fe-text-muted);
+  --el-text-color-placeholder: var(--fe-text-muted);
+  --el-border-color: var(--fe-border);
+  --el-border-color-light: var(--fe-border);
+  --el-border-color-lighter: var(--fe-border);
+  --el-border-color-extra-light: var(--fe-border);
+  --el-fill-color-blank: var(--fe-bg-elevated);
+  --el-fill-color-light: var(--fe-bg-hover);
+  --el-fill-color-lighter: var(--fe-bg-hover);
+  --el-color-primary: var(--fe-accent);
+  --el-color-primary-light-3: var(--fe-accent-hover);
+  --el-color-primary-light-5: var(--fe-accent-soft);
+  --el-color-primary-light-7: var(--fe-accent-soft);
+  --el-color-primary-light-9: var(--fe-accent-soft);
+  --el-color-danger: var(--fe-danger);
+
+  border: 1px solid var(--fe-border);
+  box-shadow: var(--fe-shadow-md);
+}
+
 // —— 全局右键菜单（用于会话列表 / 文件面板等，通过 Teleport 渲染到 body）——
 // --fe-* 变量在 :root 全局可继承，菜单元素样式不受所在 DOM 位置影响。
 .context-menu {