diff --git a/web/src/components/QuerySection.vue b/web/src/components/QuerySection.vue
index 5c241094..4c9e4332 100644
--- a/web/src/components/QuerySection.vue
+++ b/web/src/components/QuerySection.vue
@@ -59,7 +59,7 @@
               </div>
               <div v-else>
                 <div class="result-summary">
-                  <strong>检索到 {{ queryResult.length }} 个相关文档块：</strong>
+                  <span>检索到 {{ queryResult.length }} 个相关文档块：</span>
                   <a-button
                     type="text"
                     size="small"
@@ -514,7 +514,8 @@ defineExpose({
       background-color: var(--main-50);
       border-radius: 6px;
       color: var(--gray-800);
-      font-weight: 500;
+      font-size: 13px;
+      span { font-weight: 500; }
     }
 
     .clear-results-btn {
@@ -578,6 +579,7 @@ defineExpose({
       .result-content {
         padding: 8px 0;
         line-height: 1.6;
+        font-size: 13px;
         color: var(--gray-900);
         white-space: pre-wrap;
         word-break: break-word;
diff --git a/web/src/components/UserManagementComponent.vue b/web/src/components/UserManagementComponent.vue
index b5b7be00..2640fdd1 100644
--- a/web/src/components/UserManagementComponent.vue
+++ b/web/src/components/UserManagementComponent.vue
@@ -15,7 +15,9 @@
           title="刷新"
           class="refresh-btn lucide-icon-btn"
         >
-          <template #icon><RefreshCw :size="16" :class="{ spin: userManagement.refreshing }" /></template>
+          <template #icon>
+            <RefreshCw :size="16" :class="{ spin: userManagement.refreshing }" />
+          </template>
         </a-button>
         <a-button type="primary" @click="showAddUserModal" class="add-btn lucide-icon-btn">
           <template #icon><Plus :size="16" /></template>
@@ -24,6 +26,35 @@
       </div>
     </div>
 
+    <div class="filter-section">
+      <a-input
+        v-model:value="userManagement.searchKeyword"
+        class="search-input"
+        placeholder="搜索用户名 / ID / 手机号"
+        allow-clear
+      >
+        <template #prefix><Search :size="16" /></template>
+      </a-input>
+      <div class="filter-actions">
+        <a-select v-model:value="userManagement.departmentFilter" class="filter-select">
+          <a-select-option value="">全部部门</a-select-option>
+          <a-select-option
+            v-for="dept in departmentFilterOptions"
+            :key="dept.value"
+            :value="dept.value"
+          >
+            {{ dept.label }}
+          </a-select-option>
+        </a-select>
+        <a-select v-model:value="userManagement.roleFilter" class="filter-select">
+          <a-select-option value="">全部权限</a-select-option>
+          <a-select-option value="superadmin">超级管理员</a-select-option>
+          <a-select-option value="admin">管理员</a-select-option>
+          <a-select-option value="user">普通用户</a-select-option>
+        </a-select>
+      </div>
+    </div>
+
     <!-- 主内容区域 -->
     <div class="content-section">
       <a-spin :spinning="userManagement.loading">
@@ -32,11 +63,13 @@
         </div>
 
         <div class="cards-container">
-          <div v-if="userManagement.users.length === 0" class="empty-state">
-            <a-empty description="暂无用户数据" />
+          <div v-if="filteredUsers.length === 0" class="empty-state">
+            <a-empty
+              :description="userManagement.users.length === 0 ? '暂无用户数据' : '没有匹配的用户'"
+            />
           </div>
           <div v-else class="user-cards-grid">
-            <div v-for="user in userManagement.users" :key="user.id" class="user-card">
+            <div v-for="user in filteredUsers" :key="user.id" class="user-card">
               <div class="card-header">
                 <div class="user-info-main">
                   <div class="user-avatar">
@@ -225,11 +258,11 @@
 </template>
 
 <script setup>
-import { reactive, onMounted, watch } from 'vue'
+import { reactive, onMounted, watch, computed } from 'vue'
 import { message, Modal } from 'ant-design-vue'
 import { useUserStore } from '@/stores/user'
 import { departmentApi } from '@/apis'
-import { Plus, Pencil, Trash2, User, UserLock, UserStar, RefreshCw } from 'lucide-vue-next'
+import { Plus, Pencil, Trash2, User, UserLock, UserStar, RefreshCw, Search } from 'lucide-vue-next'
 import { formatDateTime } from '@/utils/time'
 
 const userStore = useUserStore()
@@ -239,6 +272,9 @@ const userManagement = reactive({
   loading: false,
   refreshing: false,
   users: [],
+  searchKeyword: '',
+  departmentFilter: '',
+  roleFilter: '',
   error: null,
   modalVisible: false,
   modalTitle: '添加用户',
@@ -263,6 +299,55 @@ const departmentManagement = reactive({
   departments: []
 })
 
+const departmentFilterOptions = computed(() => {
+  const options = new Map()
+
+  departmentManagement.departments.forEach((dept) => {
+    options.set(String(dept.id), {
+      value: String(dept.id),
+      label: dept.name
+    })
+  })
+
+  userManagement.users.forEach((user) => {
+    const departmentId = user.department_id
+    const departmentName = user.department_name
+
+    if (departmentId == null && !departmentName) return
+
+    const value = String(departmentId ?? departmentName)
+
+    if (!options.has(value)) {
+      options.set(value, {
+        value,
+        label: departmentName || `部门 ${departmentId}`
+      })
+    }
+  })
+
+  return [...options.values()]
+})
+
+const filteredUsers = computed(() => {
+  const keyword = userManagement.searchKeyword.trim().toLowerCase()
+
+  return userManagement.users.filter((user) => {
+    const matchesKeyword =
+      !keyword ||
+      [user.username, user.uid, user.phone_number].some((value) =>
+        String(value || '')
+          .toLowerCase()
+          .includes(keyword)
+      )
+    const matchesDepartment =
+      !userManagement.departmentFilter ||
+      String(user.department_id ?? user.department_name ?? '') === userManagement.departmentFilter
+    const matchesRole = !userManagement.roleFilter || user.role === userManagement.roleFilter
+
+    return matchesKeyword && matchesDepartment && matchesRole
+  })
+})
+
 // 获取部门列表
 const fetchDepartments = async () => {
   if (!userStore.isSuperAdmin) return // 普通管理员不需要获取所有部门列表
@@ -613,6 +698,57 @@ onMounted(async () => {
     }
   }
 
+  .filter-section {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 12px;
+    margin-bottom: 16px;
+    flex-wrap: wrap;
+
+    .search-input {
+      width: 300px;
+      max-width: 100%;
+
+      :deep(.ant-input-prefix) {
+        color: var(--gray-500);
+        margin-right: 6px;
+      }
+    }
+
+    .filter-actions {
+      display: flex;
+      align-items: center;
+      justify-content: flex-end;
+      gap: 8px;
+      margin-left: auto;
+    }
+
+    .filter-select {
+      width: 150px;
+    }
+  }
+
+  @media (max-width: 640px) {
+    .filter-section {
+      align-items: stretch;
+
+      .search-input,
+      .filter-actions {
+        width: 100%;
+      }
+
+      .filter-actions {
+        margin-left: 0;
+      }
+
+      .filter-select {
+        flex: 1;
+        min-width: 0;
+      }
+    }
+  }
+
   .content-section {
     overflow: hidden;
 
diff --git a/web/src/components/model-management/AgentManagePanel.vue b/web/src/components/model-management/AgentManagePanel.vue
index 3fe09f5b..6f994ffb 100644
--- a/web/src/components/model-management/AgentManagePanel.vue
+++ b/web/src/components/model-management/AgentManagePanel.vue
@@ -34,6 +34,7 @@ const agentLoading = ref(false)
 const saving = ref(false)
 const searchQuery = ref('')
 
+const DEFAULT_AGENT_BACKEND_ID = 'ChatbotAgent'
 const agentBackendOptions = ref([])
 
 const showAgentModal = ref(false)
@@ -46,7 +47,7 @@ const agentShareConfig = ref({ access_level: 'user', department_ids: [], user_ui
 const agentForm = reactive({
   slug: '',
   name: '',
-  backend_id: 'ChatbotAgent',
+  backend_id: DEFAULT_AGENT_BACKEND_ID,
   description: '',
   icon: ''
 })
@@ -63,6 +64,7 @@ const agentModalMenuItems = computed(() => {
   }
   return items
 })
+const showAgentModalSidebar = computed(() => agentModalMenuItems.value.length > 1)
 const runtimeConfigSegment = computed(() =>
   runtimeAgentModalTabs.includes(agentModalActiveTab.value) ? agentModalActiveTab.value : 'model'
 )
@@ -91,7 +93,7 @@ const agentStats = computed(() => ({
   manageable: agentStore.agents.filter((agent) => agent.can_manage).length,
   global: agentStore.agents.filter((agent) => agent.share_config?.access_level === 'global').length
 }))
-const getDefaultBackendId = () => agentBackendOptions.value[0]?.value || 'ChatbotAgent'
+const getDefaultBackendId = () => DEFAULT_AGENT_BACKEND_ID
 
 const getInitialShareConfig = () => ({
   access_level: userStore.isAdmin ? 'global' : 'user',
@@ -183,7 +185,7 @@ const openEditAgentModal = async (agent) => {
   Object.assign(agentForm, {
     slug: detail.id || detail.slug || '',
     name: detail.name || '',
-    backend_id: detail.backend_id || 'ChatbotAgent',
+    backend_id: detail.backend_id || DEFAULT_AGENT_BACKEND_ID,
     description: detail.description || '',
     icon: detail.icon || ''
   })
@@ -404,8 +406,8 @@ defineExpose({
           </div>
         </div>
       </template>
-      <div class="agent-modal-content">
-        <aside class="agent-modal-sidebar" aria-label="智能体配置分组">
+      <div class="agent-modal-content" :class="{ 'without-sidebar': !showAgentModalSidebar }">
+        <aside v-if="showAgentModalSidebar" class="agent-modal-sidebar" aria-label="智能体配置分组">
           <button
             v-for="item in agentModalMenuItems"
             :key="item.key"
@@ -461,15 +463,17 @@ defineExpose({
                     <span v-else class="agent-inline-slug">{{ agentForm.slug || editingAgentId }}</span>
                   </div>
                 </div>
-                <div class="agent-backend-summary" aria-label="智能体后端">
-                  <component :is="selectedBackendIcon" :size="16" />
+                <div class="agent-backend-summary" :class="{ editable: !editingAgentId }" aria-label="智能体后端">
+                  <span class="agent-backend-icon">
+                    <component :is="selectedBackendIcon" :size="16" />
+                  </span>
                   <div class="agent-backend-text">
-                    <span class="agent-backend-label">后端</span>
+                    <span class="agent-backend-label">智能体后端</span>
                     <a-select
                       v-if="!editingAgentId"
                       v-model:value="agentForm.backend_id"
                       class="agent-backend-select"
-                      size="small"
+                      :bordered="false"
                       :options="agentBackendOptions"
                     />
                     <span v-else class="agent-backend-name">{{ selectedBackendLabel }}</span>
@@ -611,6 +615,10 @@ defineExpose({
   border: 1px solid var(--gray-150);
   border-radius: 12px;
   background: var(--gray-0);
+
+  &.without-sidebar {
+    grid-template-columns: minmax(0, 1fr);
+  }
 }
 
 .agent-modal-sidebar {
@@ -656,10 +664,11 @@ defineExpose({
   }
 
   &.active {
-    border-color: var(--main-100);
     background: var(--gray-0);
     color: var(--main-800);
-    font-weight: 600;
+    span {
+      font-weight: 600;
+    }
   }
 }
 
@@ -862,19 +871,38 @@ defineExpose({
   display: inline-flex;
   align-items: center;
   flex-shrink: 0;
-  gap: 8px;
-  min-height: 40px;
-  padding: 7px 10px;
-  border: 1px solid var(--gray-150);
+  gap: 10px;
+  min-width: 220px;
+  min-height: 56px;
+  padding: 10px 12px;
+  border: 1px solid var(--main-100);
+  border-radius: 12px;
+  background: linear-gradient(135deg, var(--gray-0), var(--main-10));
+  color: var(--main-700);
+
+  &.editable {
+    padding-right: 8px;
+  }
+}
+
+.agent-backend-icon {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  flex-shrink: 0;
+  width: 32px;
+  height: 32px;
   border-radius: 10px;
-  background: var(--gray-0);
+  background: var(--main-50);
   color: var(--main-700);
 }
 
 .agent-backend-text {
   display: flex;
+  flex: 1;
   flex-direction: column;
-  gap: 2px;
+  min-width: 0;
+  gap: 3px;
   line-height: 1.2;
 }
 
@@ -886,19 +914,30 @@ defineExpose({
 .agent-backend-name {
   max-width: 180px;
   overflow: hidden;
-  color: var(--gray-800);
-  font-size: 12px;
+  color: var(--gray-900);
+  font-size: 13px;
   font-weight: 600;
   text-overflow: ellipsis;
   white-space: nowrap;
 }
 
 .agent-backend-select {
-  min-width: 160px;
+  width: 170px;
+  margin: -3px 0 -5px -11px;
 
   :deep(.ant-select-selector) {
-    border-color: var(--gray-150) !important;
-    border-radius: 8px !important;
+    background: transparent !important;
+    box-shadow: none !important;
+  }
+
+  :deep(.ant-select-selection-item) {
+    color: var(--gray-900);
+    font-size: 13px;
+    font-weight: 600;
+  }
+
+  :deep(.ant-select-arrow) {
+    color: var(--gray-500);
   }
 }
 
diff --git a/web/src/layouts/AppLayout.vue b/web/src/layouts/AppLayout.vue
index c027f6ab..7a9a4bfe 100644
--- a/web/src/layouts/AppLayout.vue
+++ b/web/src/layouts/AppLayout.vue
@@ -5,7 +5,7 @@ import { GithubOutlined } from '@ant-design/icons-vue'
 import {
   BarChart3,
   ClipboardList,
-  Blocks,
+  LibraryBig,
   Box,
   FolderKanban,
   PanelLeftClose,
@@ -137,22 +137,22 @@ const mainList = computed(() => {
 
   if (userStore.isAdmin) {
     items.push({
-      name: '扩展管理',
+      name: '智能体扩展',
       path: '/extensions',
       activePaths: ['/extensions'],
-      icon: Blocks,
-      activeIcon: Blocks
+      icon: LibraryBig,
+      activeIcon: LibraryBig
     })
 
     items.push({
-      name: '模型管理',
+      name: '智能体管理',
       path: '/model-manage',
       icon: Box,
       activeIcon: Box
     })
 
     items.push({
-      name: 'Dashboard',
+      name: '数据总览',
       path: '/dashboard',
       icon: BarChart3,
       activeIcon: BarChart3