diff --git a/web/src/components/AgentChatComponent.vue b/web/src/components/AgentChatComponent.vue
index 830825a6..36eb644e 100644
--- a/web/src/components/AgentChatComponent.vue
+++ b/web/src/components/AgentChatComponent.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="chat-container" ref="chatContainerRef">
+  <div class="chat-container">
     <ChatSidebarComponent
       :current-chat-id="currentChatId"
       :chats-list="chatsList"
@@ -16,13 +16,10 @@
       @toggle-sidebar="toggleSidebar"
       @open-agent-modal="openAgentModal"
       :class="{
-        'floating-sidebar': isSmallContainer,
         'sidebar-open': chatUIStore.isSidebarOpen,
-        'no-transition': localUIState.isInitialRender,
-        'collapsed': isSmallContainer && !chatUIStore.isSidebarOpen
+        'no-transition': localUIState.isInitialRender
       }"
     />
-    <div class="sidebar-backdrop" v-if="chatUIStore.isSidebarOpen && isSmallContainer" @click="toggleSidebar"></div>
     <div class="chat">
       <div class="chat-header">
         <div class="header__left">
@@ -39,7 +36,7 @@
           >
             <LoaderCircle v-if="chatUIStore.creatingNewChat" class="nav-btn-icon loading-icon" size="18"/>
             <MessageCirclePlus v-else class="nav-btn-icon"  size="18"/>
-            <span class="text" :class="{'hide-text': isMediumContainer}">新对话</span>
+            <span class="text">新对话</span>
           </div>
           <div
             v-if="!props.singleMode"
@@ -68,7 +65,7 @@
               <span v-if="hasAgentStateContent" class="text">状态</span>
             </div>
           </AgentPopover>
-          <slot name="header-right" :is-medium-container="isMediumContainer"></slot>
+          <slot name="header-right"></slot>
         </div>
       </div>
 
@@ -239,7 +236,6 @@ const threadMessages = ref({});
 // 本地 UI 状态（仅在本组件使用）
 const localUIState = reactive({
   isInitialRender: true,
-  containerWidth: 0,
 });
 
 // AgentState Popover 状态
@@ -367,25 +363,12 @@ const isStreaming = computed(() => {
   return threadState ? threadState.isStreaming : false;
 });
 const isProcessing = computed(() => isStreaming.value);
-const isSmallContainer = computed(() => localUIState.containerWidth <= 520);
-const isMediumContainer = computed(() => localUIState.containerWidth <= 768);
 
 // ==================== SCROLL & RESIZE HANDLING ====================
-const chatContainerRef = ref(null);
 const scrollController = new ScrollController('.chat');
-let resizeObserver = null;
 
 onMounted(() => {
   nextTick(() => {
-    if (chatContainerRef.value) {
-      localUIState.containerWidth = chatContainerRef.value.offsetWidth;
-      resizeObserver = new ResizeObserver(entries => {
-        for (let entry of entries) {
-          localUIState.containerWidth = entry.contentRect.width;
-        }
-      });
-      resizeObserver.observe(chatContainerRef.value);
-    }
     const chatContainer = document.querySelector('.chat');
     if (chatContainer) {
       chatContainer.addEventListener('scroll', scrollController.handleScroll, { passive: true });
@@ -395,7 +378,6 @@ onMounted(() => {
 });
 
 onUnmounted(() => {
-  if (resizeObserver) resizeObserver.disconnect();
   scrollController.cleanup();
     // 清理所有线程状态
   resetOnGoingConv();
@@ -1029,38 +1011,6 @@ watch(conversations, () => {
   position: relative;
 }
 
-.sidebar-backdrop {
-  display: none; /* 默认隐藏，通过v-if控制显示 */
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  bottom: 0;
-  background-color: rgba(0, 0, 0, 0.4);
-  z-index: 99;
-  animation: fadeIn 0.3s ease;
-}
-
-.floating-sidebar {
-  position: absolute !important;
-  z-index: 1001;
-  height: 100%;
-  left: 0;
-  top: 0;
-  transform: translateX(0);
-  transition: transform 0.3s ease;
-  width: 80% !important;
-  max-width: 300px;
-
-  &.no-transition {
-    transition: none !important;
-  }
-
-  &.collapsed {
-    transform: translateX(-100%);
-  }
-}
-
 .chat {
   position: relative;
   flex: 1;
@@ -1332,14 +1282,7 @@ watch(conversations, () => {
   }
 }
 
-
-
 @media (max-width: 768px) {
-  .chat-sidebar.collapsed {
-    width: 0;
-    border: none;
-  }
-
   .chat-header {
     .header__left {
       .text {
@@ -1348,56 +1291,17 @@ watch(conversations, () => {
     }
   }
 }
-
-@media (max-width: 520px) {
-  .sidebar-backdrop {
-    display: block;
-  }
-
-  .chat-box {
-    padding: 1rem 1rem;
-  }
-
-  .bottom {
-    padding: 0.5rem 0.5rem;
-  }
-
-  .chat-header {
-    padding: 0.5rem 0 !important;
-
-  }
-
-  .floating-sidebar {
-    position: fixed;
-    z-index: 100;
-    height: 100%;
-    left: 0;
-    top: 0;
-    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
-    transform: translateX(0);
-    transition: transform 0.3s ease;
-    width: 80% !important;
-    max-width: 300px;
-
-    &.collapsed {
-      transform: translateX(-100%);
-    }
-  }
-}
-
-.hide-text {
-  display: none;
-}
 </style>
 
 <style lang="less">
 .agent-nav-btn {
   display: flex;
   gap: 10px;
-  padding: 6px 14px;
+  padding: 6px 8px;
+  height: 32px;
   justify-content: center;
   align-items: center;
-  border-radius: 12px;
+  border-radius: 8px;
   color: var(--gray-900);
   cursor: pointer;
   width: auto;
@@ -1407,7 +1311,7 @@ watch(conversations, () => {
   background: transparent;
 
   &:hover:not(.is-disabled) {
-    background-color: var(--gray-50);
+    background-color: var(--gray-100);
   }
 
   &.is-disabled {
@@ -1417,7 +1321,7 @@ watch(conversations, () => {
   }
 
   .nav-btn-icon {
-    height: 24px;
+    height: 18px;
   }
 
   .loading-icon {
diff --git a/web/src/components/AgentConfigSidebar.vue b/web/src/components/AgentConfigSidebar.vue
index 7c670cb6..79c63663 100644
--- a/web/src/components/AgentConfigSidebar.vue
+++ b/web/src/components/AgentConfigSidebar.vue
@@ -643,6 +643,7 @@ const resetConfig = async () => {
 
         .save-btn {
           flex: 1;
+          height: 42px;
           background-color: var(--gray-100);
           border: none;
           border-radius: 6px;
@@ -1133,7 +1134,7 @@ const resetConfig = async () => {
 // 响应式适配
 @media (max-width: 768px) {
   .agent-config-sidebar.open {
-    width: 100vw;
+    width: 100%;
   }
 }
 </style>
diff --git a/web/src/components/AiTextarea.vue b/web/src/components/AiTextarea.vue
index 4b70e281..8a283bcc 100644
--- a/web/src/components/AiTextarea.vue
+++ b/web/src/components/AiTextarea.vue
@@ -16,9 +16,9 @@
         @click="generateDescription"
       >
         <template #icon>
-          <Sparkles size="14" />
+          <WandSparkles size="14" />
         </template>
-        <span v-if="!loading" class="ai-text">润色</span>
+        <span v-if="!loading" class="ai-text">{{ modelValue?.trim() ? '润色' : '生成' }}</span>
       </a-button>
     </a-tooltip>
   </div>
@@ -28,7 +28,7 @@
 import { ref } from 'vue'
 import { message } from 'ant-design-vue'
 import { databaseApi } from '@/apis/knowledge_api'
-import { Sparkles } from 'lucide-vue-next'
+import { WandSparkles } from 'lucide-vue-next'
 
 const props = defineProps({
   modelValue: {
@@ -97,7 +97,7 @@ const generateDescription = async () => {
     z-index: 1;
     display: flex;
     align-items: center;
-    gap: 2px;
+    gap: 4px;
     padding: 2px 6px;
     height: 24px;
     color: var(--main-color);
diff --git a/web/src/components/ChatSidebarComponent.vue b/web/src/components/ChatSidebarComponent.vue
index 5422bf86..1b86f076 100644
--- a/web/src/components/ChatSidebarComponent.vue
+++ b/web/src/components/ChatSidebarComponent.vue
@@ -243,12 +243,6 @@ const toggleCollapse = () => {
     transform: translateX(-12px);
   }
 
-  &.floating-sidebar .sidebar-content {
-    width: 100%;
-    min-width: 0;
-    max-width: 300px;
-  }
-
   &.no-transition {
     transition: none !important;
   }
diff --git a/web/src/components/ChunkParamsConfig.vue b/web/src/components/ChunkParamsConfig.vue
index d0659b96..47f97d99 100644
--- a/web/src/components/ChunkParamsConfig.vue
+++ b/web/src/components/ChunkParamsConfig.vue
@@ -9,15 +9,17 @@
       autocomplete="off"
       layout="vertical"
       >
-        <a-form-item label="Chunk Size" name="chunk_size">
-          <a-input-number v-model:value="tempChunkParams.chunk_size" :min="100" :max="10000" style="width: 100%;" />
-          <p class="param-description">每个文本片段的最大字符数</p>
-        </a-form-item>
-        <a-form-item label="Chunk Overlap" name="chunk_overlap">
-          <a-input-number v-model:value="tempChunkParams.chunk_overlap" :min="0" :max="1000" style="width: 100%;" />
-          <p class="param-description">相邻文本片段间的重叠字符数</p>
-        </a-form-item>
-        <a-form-item v-if="showQaSplit" label="分隔符 (Separator)" name="qa_separator">
+        <div class="chunk-row">
+          <a-form-item label="Chunk Size" name="chunk_size">
+            <a-input-number v-model:value="tempChunkParams.chunk_size" :min="100" :max="10000" style="width: 100%;" />
+            <p class="param-description">每个文本片段的最大字符数</p>
+          </a-form-item>
+          <a-form-item label="Chunk Overlap" name="chunk_overlap">
+            <a-input-number v-model:value="tempChunkParams.chunk_overlap" :min="0" :max="1000" style="width: 100%;" />
+            <p class="param-description">相邻文本片段间的重叠字符数</p>
+          </a-form-item>
+        </div>
+        <a-form-item v-if="showQaSplit" class="qa-separator-item" label="分隔符 (Separator)" name="qa_separator">
           <a-input
             v-model:value="tempChunkParams.qa_separator"
             placeholder="输入分隔符，例如 \n\n\n 或 ---"
@@ -59,10 +61,26 @@ defineProps({
   line-height: 1.5;
 }
 
+.chunk-row {
+  display: flex;
+  gap: 16px;
+  margin-bottom: 8px;
+}
+
+.chunk-row > .ant-form-item {
+  flex: 1;
+  margin-bottom: 0;
+}
+
+.qa-separator-item {
+  margin-top: 8px;
+  margin-bottom: 0;
+}
+
 .param-description {
   font-size: 12px;
   color: var(--gray-400);
   margin: 4px 0 0 0;
   line-height: 1.4;
 }
-</style>
\ No newline at end of file
+</style>
diff --git a/web/src/components/FileDetailModal.vue b/web/src/components/FileDetailModal.vue
index e23f3189..20d67bff 100644
--- a/web/src/components/FileDetailModal.vue
+++ b/web/src/components/FileDetailModal.vue
@@ -3,63 +3,118 @@
     v-model:open="visible"
     width="1200px"
     :footer="null"
+    :closable="false"
     wrap-class-name="file-detail"
     @after-open-change="afterOpenChange"
     :bodyStyle="{ height: '80vh', padding: '0' }"
   >
     <template #title>
       <div class="modal-title-wrapper">
-        <span>{{ file?.filename || '文件详情' }}</span>
-        <div class="download-buttons" v-if="file">
-          <a-button
-            type="text"
-            size="small"
-            @click="handleDownloadOriginal"
-            :loading="downloadingOriginal"
-            :disabled="!file.file_id"
-            :icon="h(DownloadOutlined)"
-          >
-            下载原文
-          </a-button>
-          <a-button
-            type="text"
-            size="small"
-            @click="handleDownloadMarkdown"
-            :loading="downloadingMarkdown"
-            :disabled="!((file.lines && file.lines.length > 0) || file.content)"
-            :icon="h(DownloadOutlined)"
-          >
-            下载 Markdown
-          </a-button>
+        <!-- 左侧：文件名和图标 -->
+        <div class="file-title">
+          <component :is="fileIcon" :style="{ color: fileIconColor, fontSize: '18px' }" />
+          <span class="file-name">{{ file?.filename || '文件详情' }}</span>
+        </div>
+
+        <div class="header-controls">
+          <!-- 字符数/片段数显示在 segment 左边 -->
+          <span class="view-info">
+            {{ viewMode === 'chunks' ? chunkCount + ' 个片段' : formatTextLength(charCount) + ' 字符' }}
+          </span>
+
+          <!-- 视图模式切换 -->
+          <div class="view-controls" v-if="file && hasContent">
+            <a-segmented
+              v-model:value="viewMode"
+              :options="viewModeOptions"
+            />
+          </div>
+
+          <!-- 下载按钮下拉菜单 -->
+          <a-dropdown trigger="click" v-if="file">
+            <a-button type="default" class="download-btn">
+              <template #icon><Download :size="16" /></template>
+              下载
+              <ChevronDown :size="16" style="margin-left: 4px;" />
+            </a-button>
+            <template #overlay>
+              <a-menu @click="handleDownloadMenuClick">
+                <a-menu-item key="original" :disabled="!file.file_id">
+                  <template #icon><Download :size="16" /></template>
+                  下载原文
+                </a-menu-item>
+                <a-menu-item key="markdown" :disabled="!((file.lines && file.lines.length > 0) || file.content)">
+                  <template #icon><FileText :size="16" /></template>
+                  下载 Markdown
+                </a-menu-item>
+              </a-menu>
+            </template>
+          </a-dropdown>
+
+          <!-- 自定义关闭按钮 -->
+          <button class="custom-close-btn" @click="visible = false">
+            <X :size="16" />
+          </button>
         </div>
       </div>
     </template>
     <div class="file-detail-content" v-if="file">
-      <div class="file-content-section" v-if="(file.lines && file.lines.length > 0) || file.content">
-        <MarkdownContentViewer :chunks="file.lines" :content="file.content" />
+      <!-- Markdown 模式 -->
+      <div v-if="viewMode === 'markdown'" class="content-panel">
+        <MdPreview
+          v-if="mergedContent"
+          :modelValue="mergedContent"
+          :theme="theme"
+          previewTheme="github"
+          class="markdown-content"
+        />
+        <div v-else class="empty-content">
+          <p>暂无文件内容</p>
+        </div>
       </div>
 
-      <div v-else-if="loading" class="loading-container">
-        <a-spin />
+      <!-- Chunks 模式：使用 Grid 布局 -->
+      <div v-else-if="viewMode === 'chunks'" class="chunks-panel">
+        <div class="chunk-grid">
+          <div
+            v-for="chunk in mappedChunks"
+            :key="chunk.id"
+            class="chunk-card"
+          >
+            <div class="chunk-card-header">
+              <span class="chunk-order">#{{ chunk.chunk_order_index }}</span>
+            </div>
+            <div class="chunk-card-content">
+              {{ chunk.content.replace(/\n+/g, ' ') }}
+            </div>
+          </div>
+        </div>
+        <div v-if="mappedChunks.length === 0" class="empty-content">
+          <p>暂无分块信息</p>
+        </div>
       </div>
+    </div>
 
-      <div v-else class="empty-content">
-        <p>暂无文件内容</p>
-      </div>
+    <div v-else-if="loading" class="loading-container">
+      <a-spin />
     </div>
   </a-modal>
 </template>
 
 <script setup>
-import { computed, ref, h } from 'vue';
+import { computed, ref, watch } from 'vue';
 import { useDatabaseStore } from '@/stores/database';
+import { useThemeStore } from '@/stores/theme';
 import { message } from 'ant-design-vue';
-import { DownloadOutlined } from '@ant-design/icons-vue';
 import { documentApi } from '@/apis/knowledge_api';
 import { mergeChunks } from '@/utils/chunkUtils';
-import MarkdownContentViewer from './MarkdownContentViewer.vue';
+import { getFileIcon, getFileIconColor } from '@/utils/file_utils';
+import { MdPreview } from 'md-editor-v3';
+import 'md-editor-v3/lib/preview.css';
+import { Download, ChevronDown, FileText, X } from 'lucide-vue-next';
 
 const store = useDatabaseStore();
+const themeStore = useThemeStore();
 
 const visible = computed({
   get: () => store.state.fileDetailModalVisible,
@@ -68,12 +123,70 @@ const visible = computed({
 
 const file = computed(() => store.selectedFile);
 const loading = computed(() => store.state.fileDetailLoading);
+
+// 文件图标
+const fileIcon = computed(() => getFileIcon(file.value?.filename));
+const fileIconColor = computed(() => getFileIconColor(file.value?.filename));
+
 const downloadingOriginal = ref(false);
 const downloadingMarkdown = ref(false);
 
+// 主题设置
+const theme = computed(() => themeStore.isDark ? 'dark' : 'light');
+
+// 视图模式
+const viewMode = ref('markdown');
+const hasIndexed = computed(() => ['done', 'indexed'].includes(file.value?.status));
+const hasContent = computed(() => (file.value?.lines && file.value?.lines.length > 0) || file.value?.content);
+
+const viewModeOptions = computed(() => {
+  const options = [{ label: 'Markdown', value: 'markdown' }];
+  if (hasIndexed.value) {
+    options.push({ label: 'Chunks', value: 'chunks' });
+  }
+  return options;
+});
+
+// 监听文件状态变化，重置视图模式
+watch(file, (newFile) => {
+  if (newFile) {
+    if (!hasIndexed.value) {
+      viewMode.value = 'markdown';
+    }
+  }
+});
+
+// 统计信息
+const mergeResult = computed(() => mergeChunks(file.value?.lines || []));
+const mappedChunks = computed(() => mergeResult.value.chunks);
+const mergedContent = computed(() => file.value?.content || mergeResult.value.content || '');
+const charCount = computed(() => mergedContent.value.length);
+const chunkCount = computed(() => mappedChunks.value.length || file.value?.lines?.length || 0);
+
+// 格式化文本长度
+function formatTextLength(length) {
+  if (!length && length !== 0) return '0 字符';
+
+  if (length < 1000) {
+    return `${length}`;
+  } else {
+    return `${(length / 1000).toFixed(1)}k`;
+  }
+}
+
 const afterOpenChange = (open) => {
   if (!open) {
     store.selectedFile = null;
+    viewMode.value = 'markdown';
+  }
+};
+
+// 下载菜单点击处理
+const handleDownloadMenuClick = ({ key }) => {
+  if (key === 'original') {
+    handleDownloadOriginal();
+  } else if (key === 'markdown') {
+    handleDownloadMarkdown();
   }
 };
 
@@ -143,12 +256,7 @@ const handleDownloadOriginal = async () => {
 
 // 下载 Markdown
 const handleDownloadMarkdown = () => {
-  let content = '';
-  if (file.value.content) {
-    content = file.value.content;
-  } else if (file.value.lines && file.value.lines.length > 0) {
-    content = mergeChunks(file.value.lines).content;
-  }
+  const content = mergedContent.value;
 
   if (!content) {
     message.error('没有可下载的 Markdown 内容');
@@ -198,10 +306,17 @@ const handleDownloadMarkdown = () => {
   flex-direction: column;
 }
 
-.file-content-section h4 {
-  margin-bottom: 12px;
-  font-size: 16px;
-  font-weight: 600;
+.content-panel,
+.chunks-panel {
+  flex: 1;
+  overflow-y: auto;
+  padding: 16px 0;
+  background: var(--gray-0);
+  min-height: 0;
+}
+
+.markdown-content {
+  min-height: 100%;
 }
 
 .loading-container {
@@ -215,6 +330,50 @@ const handleDownloadMarkdown = () => {
   text-align: center;
   padding: 40px 0;
   color: var(--gray-400);
+  width: 100%;
+}
+
+/* Chunks 面板样式 */
+.chunk-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
+  gap: 12px;
+}
+
+.chunk-card {
+  background: var(--gray-0);
+  border: 1px solid var(--gray-200);
+  border-radius: 8px;
+  padding: 12px;
+  transition: all 0.2s ease;
+}
+
+.chunk-card:hover {
+  border-color: var(--main-color);
+  box-shadow: 0 2px 8px rgba(1, 97, 121, 0.1);
+}
+
+.chunk-card-header {
+  display: flex;
+  align-items: center;
+  margin-bottom: 8px;
+}
+
+.chunk-order {
+  font-weight: 600;
+  color: var(--main-color);
+  font-size: 12px;
+}
+
+.chunk-card-content {
+  font-size: 12px;
+  color: var(--gray-600);
+  line-height: 1.5;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  display: -webkit-box;
+  -webkit-line-clamp: 4;
+  -webkit-box-orient: vertical;
 }
 </style>
 
@@ -239,10 +398,146 @@ const handleDownloadMarkdown = () => {
   padding-right: 8px;
 }
 
-.download-buttons {
+/* 文件标题样式 */
+.file-title {
   display: flex;
+  align-items: center;
   gap: 8px;
-  margin: 0 16px;
-  flex-shrink: 0;
 }
-</style>
\ No newline at end of file
+
+.file-name {
+  font-weight: 600;
+  font-size: 15px;
+  color: var(--gray-900);
+}
+
+.title-info {
+  font-size: 13px;
+  color: var(--gray-600);
+  font-weight: 500;
+}
+
+.header-controls {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  margin-left: auto;
+}
+
+/* 下载按钮样式 */
+.download-btn {
+  display: inline-flex;
+  align-items: center;
+  padding: 4px 8px;
+  height: 28px;
+  font-size: 13px;
+  line-height: 1;
+  border-radius: 6px;
+  gap: 4px;
+
+  svg {
+    vertical-align: middle;
+  }
+}
+
+/* 自定义关闭按钮 */
+.custom-close-btn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 28px;
+  height: 28px;
+  border: none;
+  background: transparent;
+  border-radius: 6px;
+  cursor: pointer;
+  color: var(--gray-500);
+  transition: all 0.2s;
+
+  &:hover {
+    background: var(--gray-100);
+    color: var(--gray-700);
+  }
+}
+
+/* 视图切换控件 */
+.view-controls {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.view-info {
+  font-size: 12px;
+  color: var(--gray-500);
+  white-space: nowrap;
+}
+
+/* 下拉菜单样式 */
+.ant-dropdown-menu {
+  border-radius: 8px;
+  padding: 4px;
+}
+
+.ant-dropdown-menu-item {
+  border-radius: 6px;
+  display: flex;
+  align-items: center;
+  padding: 8px 12px;
+
+  svg {
+    margin-right: 8px;
+  }
+}
+</style>
+
+<style lang="less">
+/* MdPreview 覆盖样式 - 非 scoped */
+.markdown-content {
+  .md-editor-preview-wrapper {
+    padding: 0;
+  }
+
+  #md-editor-v-2-preview-wrapper {
+    font-size: 14px;
+    line-height: 1.75;
+    color: var(--gray-1000);
+  }
+
+  #md-editor-v-2-preview-wrapper h1 {
+    font-size: 1.5rem;
+    margin: 16px 0 12px;
+    font-weight: 600;
+  }
+
+  #md-editor-v-2-preview-wrapper h2 {
+    font-size: 1.4rem;
+    margin: 16px 0 12px;
+    font-weight: 600;
+  }
+
+  #md-editor-v-2-preview-wrapper h3 {
+    font-size: 1.3rem;
+    margin: 14px 0 10px;
+    font-weight: 600;
+  }
+
+  #md-editor-v-2-preview-wrapper h4 {
+    font-size: 1.2rem;
+    margin: 14px 0 10px;
+    font-weight: 600;
+  }
+
+  #md-editor-v-2-preview-wrapper h5 {
+    font-size: 1.1rem;
+    margin: 12px 0 8px;
+    font-weight: 600;
+  }
+
+  #md-editor-v-2-preview-wrapper h6 {
+    font-size: 1rem;
+    margin: 12px 0 8px;
+    font-weight: 600;
+  }
+}
+</style>
diff --git a/web/src/components/FileTable.vue b/web/src/components/FileTable.vue
index c385c14b..3f7081c2 100644
--- a/web/src/components/FileTable.vue
+++ b/web/src/components/FileTable.vue
@@ -39,7 +39,7 @@
         </a-input>
 
         <a-dropdown trigger="click">
-          <a-button type="text" class="panel-action-btn" title="排序">
+          <a-button type="text" class="panel-action-btn" :class="{ 'active': sortField !== 'filename' }" title="排序">
             <template #icon><ArrowUpDown size="16" /></template>
           </a-button>
           <template #overlay>
@@ -52,11 +52,11 @@
         </a-dropdown>
 
         <a-dropdown trigger="click">
-          <a-button type="text" class="panel-action-btn" :class="{ 'active': statusFilter }" title="筛选状态">
+          <a-button type="text" class="panel-action-btn" :class="{ 'active': statusFilter !== 'all' }" title="筛选状态">
             <template #icon><Filter size="16" /></template>
           </a-button>
           <template #overlay>
-            <a-menu :selectedKeys="statusFilter ? [statusFilter] : []" @click="handleStatusMenuClick">
+            <a-menu :selectedKeys="[statusFilter]" @click="handleStatusMenuClick">
               <a-menu-item key="all">全部状态</a-menu-item>
               <a-menu-item v-for="opt in statusOptions" :key="opt.value">
                 {{ opt.label }}
@@ -114,7 +114,7 @@
         />
         <span>{{ selectedRowKeys.length }} 项</span>
       </div>
-      <div style="display: flex; gap: 8px;">
+      <div style="display: flex; gap: 2px;">
         <a-button
           type="link"
           @click="handleBatchParse"
@@ -202,7 +202,7 @@
         <div v-if="column.key === 'filename'">
           <template v-if="record.is_folder">
             <span class="folder-row" @click="toggleExpand(record)">
-              <component :is="expandedRowKeys.includes(record.file_id) ? h(FolderOpenFilled) : h(FolderFilled)" style="margin-right: 12px; color: #ffb800;" />
+              <component :is="expandedRowKeys.includes(record.file_id) ? h(FolderOpenFilled) : h(FolderFilled)" style="margin-right: 8px; color: #ffb800; font-size: 16px;" />
               {{ record.filename }}
             </span>
           </template>
@@ -216,7 +216,7 @@
               </div>
             </template>
             <a-button class="main-btn" type="link" @click="openFileDetail(record)">
-              <component :is="getFileIcon(record.displayName || text)" :style="{ marginRight: '6px', color: getFileIconColor(record.displayName || text) }" />
+              <component :is="getFileIcon(record.displayName || text)" :style="{ marginRight: '0', color: getFileIconColor(record.displayName || text), fontSize: '16px' }" />
               {{ record.displayName || text }}
             </a-button>
           </a-popover>
@@ -343,11 +343,7 @@ const handleSortMenuClick = (e) => {
 };
 
 const handleStatusMenuClick = (e) => {
-  if (e.key === 'all') {
-    statusFilter.value = null;
-  } else {
-    statusFilter.value = e.key;
-  }
+  statusFilter.value = e.key;
   // 状态筛选变化时重置到第一页
   paginationConfig.value.current = 1;
 };
@@ -406,9 +402,9 @@ const allSelectableFiles = computed(() => {
     // Follow getCheckboxProps logic
     if (lock.value || file.status === 'processing' || file.status === 'waiting') return false;
 
-    if (nameFilter || status) {
+    if (nameFilter || status !== 'all') {
       const nameMatch = !nameFilter || (file.filename && file.filename.toLowerCase().includes(nameFilter));
-      const statusMatch = !status || file.status === status ||
+      const statusMatch = status === 'all' || file.status === status ||
                           (status === 'indexed' && file.status === 'done') ||
                           (status === 'error_indexing' && file.status === 'failed');
       return nameMatch && statusMatch;
@@ -625,7 +621,7 @@ const handleTableChange = (pagination) => {
 
 // 文件名过滤
 const filenameFilter = ref('');
-const statusFilter = ref(null);
+const statusFilter = ref('all');
 const statusOptions = [
   { label: '已上传', value: 'uploaded' },
   { label: '解析中', value: 'parsing' },
@@ -796,11 +792,11 @@ const filteredFiles = computed(() => {
   const status = statusFilter.value;
 
   // 应用过滤
-  if (nameFilter || status) {
+  if (nameFilter || status !== 'all') {
     // 搜索/过滤模式下使用扁平列表
     return files.value.filter(file => {
       const nameMatch = !nameFilter || (file.filename && file.filename.toLowerCase().includes(nameFilter));
-      const statusMatch = !status || file.status === status ||
+      const statusMatch = status === 'all' || file.status === status ||
                           (status === 'indexed' && file.status === 'done') ||
                           (status === 'error_indexing' && file.status === 'failed');
       return nameMatch && statusMatch;
@@ -1134,7 +1130,7 @@ import ChunkParamsConfig from '@/components/ChunkParamsConfig.vue';
 .panel-actions {
   display: flex;
   align-items: center;
-  gap: 4px;
+  gap: 6px;
 
   .action-searcher {
     width: 120px;
@@ -1142,6 +1138,7 @@ import ChunkParamsConfig from '@/components/ChunkParamsConfig.vue';
     border-radius: 6px;
     padding: 4px 8px;
     border: none;
+    box-shadow: 0 0 0 1px var(--shadow-1);
   }
 }
 
@@ -1188,7 +1185,9 @@ import ChunkParamsConfig from '@/components/ChunkParamsConfig.vue';
   flex: 1;
   overflow: auto;
   background-color: transparent;
-  min-height: 0; /* 让 flex 子项可以正确缩小 */
+  min-height: 0;
+  table-layout: fixed;
+  padding-left: 4px;
 }
 
 .my-table .main-btn {
@@ -1262,6 +1261,12 @@ import ChunkParamsConfig from '@/components/ChunkParamsConfig.vue';
   opacity: 0.9;
 }
 
+.my-table .span-type.md,
+.my-table .span-type.markdown {
+  background-color: var(--gray-200);
+  color: var(--gray-800);
+}
+
 .auto-refresh-btn {
   height: 24px;
   padding: 0 8px;
@@ -1272,15 +1277,13 @@ import ChunkParamsConfig from '@/components/ChunkParamsConfig.vue';
   display: flex;
   align-items: center;
   justify-content: center;
-  border-radius: 6px;
-  padding: 0 4px;
-  color: var(--gray-700);
+  border-radius: 8px;
+  padding: 4px;
+  color: var(--gray-600);
   transition: all 0.1s ease;
   font-size: 12px;
-
-  svg {
-    height: 16px;
-  }
+  width: auto;
+  height: auto;
 
   &.expand {
     transform: scaleX(-1);
@@ -1307,6 +1310,7 @@ import ChunkParamsConfig from '@/components/ChunkParamsConfig.vue';
   color: var(--main-color);
   background-color: var(--gray-100);
   font-weight: 600;
+  box-shadow: 0 0 0 1px var(--shadow-1);
 }
 
 .action-trigger-btn {
diff --git a/web/src/components/FileUploadModal.vue b/web/src/components/FileUploadModal.vue
index c073a525..5fc47b29 100644
--- a/web/src/components/FileUploadModal.vue
+++ b/web/src/components/FileUploadModal.vue
@@ -39,28 +39,26 @@
 
       <!-- 2. 配置面板 -->
       <div class="settings-panel">
-        <!-- 第一行：存储位置 -->
-        <div class="setting-row">
-          <div class="setting-label">存储位置</div>
-          <div class="setting-content flex-row">
-             <a-tree-select
-                v-model:value="selectedFolderId"
-                show-search
-                class="folder-select"
-                :dropdown-style="{ maxHeight: '400px', overflow: 'auto' }"
-                placeholder="选择目标文件夹（默认为根目录）"
-                allow-clear
-                tree-default-expand-all
-                :tree-data="folderTreeData"
-                tree-node-filter-prop="title"
-             >
-             </a-tree-select>
+        <!-- 第一行：存储位置 + OCR 引擎 -->
+        <div class="setting-row two-cols">
+          <div class="col-item">
+            <div class="setting-label">存储位置</div>
+            <div class="setting-content flex-row">
+               <a-tree-select
+                  v-model:value="selectedFolderId"
+                  show-search
+                  class="folder-select"
+                  :dropdown-style="{ maxHeight: '400px', overflow: 'auto' }"
+                  placeholder="选择目标文件夹（默认为根目录）"
+                  allow-clear
+                  tree-default-expand-all
+                  :tree-data="folderTreeData"
+                  tree-node-filter-prop="title"
+               >
+               </a-tree-select>
+            </div>
+            <p class="param-description">选择文件保存的目标文件夹</p>
           </div>
-        </div>
-
-        <!-- 第二行：OCR (单列布局) -->
-        <div class="setting-row">
-          <!-- OCR 配置 -->
           <div class="col-item">
             <div class="setting-label">
               OCR 引擎
@@ -80,15 +78,20 @@
                 :disabled="ocrHealthChecking"
                 class="ocr-select"
               />
-              <!-- 紧凑的状态提示 -->
-              <div class="status-mini-tip" v-if="chunkParams.enable_ocr !== 'disable'">
-                <span v-if="selectedOcrStatus === 'healthy'" class="text-success">
-                   <CheckCircleFilled /> {{ selectedOcrMessage || '服务正常' }}
-                </span>
-                <span v-else-if="selectedOcrStatus && selectedOcrStatus !== 'unknown'" class="text-warning">
-                   ⚠️ {{ selectedOcrMessage || '服务异常' }}
-                </span>
-              </div>
+              <p class="param-description">
+                <template v-if="!isOcrEnabled">
+                  不启用 OCR，仅处理文本文件
+                </template>
+                <template v-else-if="selectedOcrStatus === 'healthy'">
+                  {{ selectedOcrMessage || '服务正常' }}
+                </template>
+                <template v-else-if="selectedOcrStatus === 'unknown'">
+                  点击刷新图标检查服务状态
+                </template>
+                <template v-else>
+                  {{ selectedOcrMessage || '服务异常' }}
+                </template>
+              </p>
             </div>
           </div>
         </div>
@@ -878,7 +881,6 @@ const chunkData = async () => {
   display: flex;
   justify-content: space-between;
   align-items: center;
-  padding: 0 4px;
 }
 
 .help-link-btn {
@@ -934,7 +936,7 @@ const chunkData = async () => {
     flex: 1;
     display: flex;
     flex-direction: column;
-    gap: 8px;
+    gap: 4px;
     min-width: 0; // Fix flex overflow
   }
 }
@@ -983,15 +985,28 @@ const chunkData = async () => {
   white-space: nowrap;
 }
 
-.status-mini-tip {
-  margin-top: 6px;
+.param-description {
   font-size: 12px;
+  color: var(--gray-400);
+  margin: 4px 0 0 0;
+  line-height: 1.4;
   display: flex;
   align-items: center;
   gap: 4px;
 
-  .text-success { color: var(--color-success-500); }
-  .text-warning { color: var(--color-warning-500); }
+  .text-success {
+    color: var(--color-success-500);
+    display: flex;
+    align-items: center;
+    gap: 4px;
+  }
+
+  .text-warning {
+    color: var(--color-warning-500);
+    display: flex;
+    align-items: center;
+    gap: 4px;
+  }
 }
 
 /* Chunk Display Card */
diff --git a/web/src/components/MarkdownContentViewer.vue b/web/src/components/MarkdownContentViewer.vue
index 2f6bdc78..942aca2b 100644
--- a/web/src/components/MarkdownContentViewer.vue
+++ b/web/src/components/MarkdownContentViewer.vue
@@ -13,7 +13,8 @@
           @click="toggleChunkPanel"
           :title="chunkPanelVisible ? '隐藏片段列表' : '显示片段列表'"
         >
-          {{ chunkPanelVisible ? '«' : '»' }}
+          <ChevronLeft v-if="chunkPanelVisible" :size="14" />
+          <ChevronRight v-else :size="14" />
         </button>
       </div>
     </div>
@@ -98,6 +99,7 @@ import { MdPreview } from 'md-editor-v3';
 import 'md-editor-v3/lib/preview.css';
 import { mergeChunks, getChunkPreview } from '@/utils/chunkUtils';
 import { useThemeStore } from '@/stores/theme';
+import { ChevronRight, ChevronLeft } from 'lucide-vue-next';
 
 const props = defineProps({
   chunks: {
@@ -209,16 +211,18 @@ onUnmounted(() => {
 }
 
 .toggle-btn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
   background: var(--gray-100);
-  /* color: var(--gray-0); */
   border: none;
   border-radius: 4px;
-  width: 28px;
+  width: 24px;
   height: 24px;
+  padding: 0;
   cursor: pointer;
-  font-size: 14px;
-  font-weight: bold;
   transition: all 0.2s ease;
+  color: var(--gray-700);
 }
 
 .toggle-btn:hover {
diff --git a/web/src/components/dashboard/FeedbackModalComponent.vue b/web/src/components/dashboard/FeedbackModalComponent.vue
index b1387b01..e0a9994d 100644
--- a/web/src/components/dashboard/FeedbackModalComponent.vue
+++ b/web/src/components/dashboard/FeedbackModalComponent.vue
@@ -460,6 +460,7 @@ watch(() => props.agentId, () => {
 
 // 空状态
 .empty-state {
+  grid-column: 1 / -1;
   display: flex;
   justify-content: center;
   align-items: center;
diff --git a/web/src/layouts/AppLayout.vue b/web/src/layouts/AppLayout.vue
index 8355c194..ff7f2760 100644
--- a/web/src/layouts/AppLayout.vue
+++ b/web/src/layouts/AppLayout.vue
@@ -192,10 +192,6 @@ provide('settingsModal', {
         <UserInfoComponent />
       </div>
     </div>
-    <div class="header-mobile">
-      <RouterLink to="/agent" class="nav-item" active-class="active">对话</RouterLink>
-      <RouterLink to="/database" class="nav-item" active-class="active">知识</RouterLink>
-    </div>
     <router-view v-slot="{ Component, route }" id="app-router-view">
       <keep-alive v-if="route.meta.keepAlive !== false">
         <component :is="Component" />
@@ -235,10 +231,6 @@ provide('settingsModal', {
   height: 100vh;
   min-width: var(--min-width);
 
-  .header-mobile {
-    display: none;
-  }
-
   .debug-panel {
     position: absolute;
     z-index: 100;
@@ -293,7 +285,7 @@ div.header, #app-router-view {
   .logo {
     width: 34px;
     height: 34px;
-    margin: 12px 0 20px 0;
+    margin: 6px 0 20px 0;
 
     img {
       width: 100%;
@@ -417,49 +409,6 @@ div.header, #app-router-view {
 }
 
 
-@media (max-width: 520px) {
-  .app-layout {
-    flex-direction: column-reverse;
-
-    div.header {
-      display: none;
-    }
-
-    .debug-panel {
-      bottom: 10rem;
-    }
-
-  }
-  .app-layout div.header-mobile {
-    display: flex;
-    flex-direction: row;
-    width: 100%;
-    padding: 0 20px;
-    justify-content: space-around;
-    align-items: center;
-    flex: 0 0 60px;
-    border-right: none;
-    height: 40px;
-
-    .nav-item {
-      text-decoration: none;
-      width: 40px;
-      color: var(--gray-900);
-      font-size: 1rem;
-      font-weight: bold;
-      transition: color 0.1s ease-in-out, font-size 0.1s ease-in-out;
-
-      &.active {
-        color: var(--gray-10000);
-        font-size: 1.1rem;
-      }
-    }
-  }
-  .app-layout .chat-box::webkit-scrollbar {
-    width: 0;
-  }
-}
-
 .app-layout.use-top-bar {
   flex-direction: column;
 }
diff --git a/web/src/utils/file_utils.js b/web/src/utils/file_utils.js
index 96f20706..45713ff3 100644
--- a/web/src/utils/file_utils.js
+++ b/web/src/utils/file_utils.js
@@ -63,9 +63,9 @@ export const getFileIconColor = (filename) => {
     'text': '#1890ff',
     'log': '#1890ff',
 
-    // Markdown文件 - 深蓝色
-    'md': '#0050b3',
-    'markdown': '#0050b3',
+    // Markdown文件 - 深灰色
+    'md': '#595959',
+    'markdown': '#595959',
 
     // PDF文件 - 红色
     'pdf': '#ff4d4f',
diff --git a/web/src/views/DataBaseInfoView.vue b/web/src/views/DataBaseInfoView.vue
index a88d221c..fed4e50a 100644
--- a/web/src/views/DataBaseInfoView.vue
+++ b/web/src/views/DataBaseInfoView.vue
@@ -39,6 +39,7 @@
               @click="openSearchConfigModal"
             >
               <SettingOutlined />
+              <span class="config-text">检索配置</span>
             </a-button>
           </a-tooltip>
         </template>
@@ -540,12 +541,13 @@ const handleMouseUp = () => {
 }
 
 .config-btn {
-  color: var(--gray-500);
+  color: var(--gray-600);
   font-size: 16px;
   display: flex;
   align-items: center;
   justify-content: center;
-  width: 32px;
+  gap: 4px;
+  padding: 4px 8px;
   height: 32px;
   border-radius: 6px;
   transition: all 0.2s;
@@ -554,24 +556,9 @@ const handleMouseUp = () => {
     color: var(--main-color);
     background-color: var(--gray-100);
   }
-}
 
-
-/* Responsive design for smaller screens */
-@media (max-width: 768px) {
-  .unified-layout {
-    flex-direction: column;
-  }
-
-  .unified-layout .left-panel {
-    border-right: none;
-    border-bottom: 1px solid var(--gray-200);
-  }
-
-  .unified-layout .resize-handle {
-    width: 100%;
-    height: 2px;
-    cursor: row-resize;
+  .config-text {
+    font-size: 13px;
   }
 }
 
diff --git a/web/src/views/DataBaseView.vue b/web/src/views/DataBaseView.vue
index 93708353..8f6f88fc 100644
--- a/web/src/views/DataBaseView.vue
+++ b/web/src/views/DataBaseView.vue
@@ -90,7 +90,7 @@
           size="default"
         />
         <span style="margin-left: 12px;">设置为私有知识库</span>
-        <a-tooltip title="在部分智能体的设计中，可以根据隐私标志来决定启用什么模型和策略。例如，对于私有知识库，可以选择更严格的数据处理和访问控制策略，以保护敏感信息的安全性和隐私性。">
+        <a-tooltip title="当前未使用此属性。在部分智能体的设计中，可以根据隐私标志来决定启用什么模型和策略。例如，对于私有知识库，可以选择更严格的数据处理和访问控制策略，以保护敏感信息的安全性和隐私性。">
           <InfoCircleOutlined style="margin-left: 8px; color: var(--gray-500); cursor: help;" />
         </a-tooltip>
       </div>