diff --git a/webui/README.md b/webui/README.md
new file mode 100644
index 0000000..edecafb
--- /dev/null
+++ b/webui/README.md
@@ -0,0 +1,346 @@
+# SRDB WebUI
+
+基于 Preact.js 的 SRDB WebUI，使用无构建工具工作流（No Build Workflow）。
+
+## 技术栈
+
+- **Preact 10.19.3** - 轻量级 React 替代品（3KB）
+- **HTM 3.1.1** - JSX 替代方案，直接在浏览器中使用
+- **dom-align** - 智能元素定位（用于 Popover 和 Tooltip）
+- **ESM.sh** - ES Modules CDN
+
+## 特性
+
+✅ **零构建工具** - 无需 Webpack、Vite 等构建工具
+✅ **原生 ES Modules** - 直接使用 `import` 语法
+✅ **HTM 语法** - 使用 `html` 标签模板字符串代替 JSX
+✅ **主题切换** - 支持深色/浅色主题，持久化保存
+✅ **智能 Popover** - 鼠标悬停单元格显示完整数据
+✅ **字段 Tooltip** - 悬停表头显示字段注释，悬停表名显示表注释
+✅ **响应式设计** - 适配不同屏幕尺寸
+✅ **数据分页** - 支持自定义每页显示行数（20/50/100/200）+ 跳页功能
+✅ **列选择器** - 下拉菜单选择要显示的列，支持持久化保存
+✅ **详情模态框** - 点击眼睛图标查看单条记录的完整数据
+✅ **Manifest 弹窗** - 点击按钮打开弹窗，实时显示 LSM-Tree 结构和 Compaction 统计
+✅ **索引标识** - 有索引的字段显示 🔍 图标
+✅ **悬浮加载提示** - 加载时顶部显示悬浮提示，不影响布局
+
+## 目录结构
+
+```
+webui/
+├── static/
+│   ├── index.html          # 主 HTML 文件
+│   ├── css/
+│   │   └── styles.css      # 全局样式（支持主题）
+│   │
+│   └── js/
+│       ├── main.js         # 应用入口
+│       ├── hooks/          # 自定义 Hooks
+│       │   ├── useCellPopover.js    # 单元格 Popover Hook
+│       │   └── useTooltip.js        # Tooltip Hook
+│       │
+│       └── components/     # Preact 组件
+│           ├── App.js                  # 主应用组件
+│           ├── Sidebar.js              # 侧边栏（表列表）
+│           ├── TableItem.js            # 表列表项（可展开字段）
+│           ├── FieldList.js            # 字段列表
+│           ├── TableView.js            # 表视图（主容器）
+│           ├── ColumnSelector.js       # 列选择器（下拉菜单）
+│           ├── DataTable.js            # 数据表格
+│           ├── TableRow.js             # 表格行
+│           ├── TableCell.js            # 表格单元格
+│           ├── Pagination.js           # 分页器（sticky 底部）
+│           ├── PageJumper.js           # 跳页输入框
+│           ├── RowDetailModal.js       # 记录详情模态框
+│           ├── ManifestModal.js        # Manifest 弹窗
+│           ├── ManifestView.js         # Manifest 视图
+│           ├── LevelCard.js            # 层级卡片
+│           ├── FileCard.js             # 文件卡片
+│           ├── StatCard.js             # 统计卡片
+│           └── CompactionStats.js      # Compaction 统计
+│
+├── webui.go                    # Go 后端处理器
+└── README.md                   # 本文件
+```
+
+## 快速开始
+
+### 1. 启动后端服务
+
+```bash
+cd /path/to/srdb/examples/webui
+go run main.go serve --db ./data --addr :8080
+```
+
+### 2. 访问 WebUI
+
+浏览器打开：`http://localhost:8080/`
+
+## 使用技巧
+
+1. **查看字段说明**：鼠标悬停在表头字段名上，会显示该字段的 comment
+2. **查看表说明**：鼠标悬停在表名上，会显示该表的 comment
+3. **选择显示列**：点击右上角的 "Columns" 按钮，勾选要显示的列，选择会自动保存
+4. **查看完整数据**：鼠标悬停在表格单元格上，会显示该单元格的完整数据
+5. **查看记录详情**：鼠标悬停在行上，点击出现的眼睛图标查看完整记录
+6. **跳转到指定页**：在分页器输入页码，点击"跳转"按钮
+7. **查看 LSM-Tree 结构**：点击右上角的 "📊 Manifest" 按钮打开弹窗
+8. **展开表字段**：在侧边栏点击表名前的 ▶ 图标展开查看所有字段
+9. **识别索引字段**：带有 🔍 图标的字段表示该字段已建立索引
+10. **主题切换**：点击左上角的 ☀️/🌙 图标切换深色/浅色主题
+
+## 核心组件说明
+
+### App.js - 主应用
+负责：
+- 主题管理（深色/浅色切换，LocalStorage 持久化）
+- 表列表加载和选择
+- 侧边栏 + 主内容区布局
+
+### Sidebar.js - 侧边栏
+特性：
+- 可展开的表列表（点击 ▶ 展开字段）
+- 表统计信息（字段数）
+- 字段列表显示（字段名、类型、索引图标）
+- 选中状态高亮
+
+### TableView.js - 表视图容器
+包含：
+- 表名标题（悬停显示表注释）
+- 行数统计（格式化显示 K/M）
+- Manifest 按钮（打开弹窗）
+- 列选择器按钮
+- DataTable 组件
+- ManifestModal 组件
+
+### ColumnSelector.js - 列选择器
+特性：
+- 下拉菜单式选择器
+- 多选复选框
+- 显示字段类型和索引图标
+- LocalStorage 持久化保存
+- 选中数量徽章显示
+
+### DataTable.js - 数据表格
+功能：
+- 响应式表格渲染
+- 表头 Tooltip（显示字段注释）
+- 单元格 Popover（悬停显示完整数据）
+- 时间格式化（`_time` 字段）
+- 悬浮加载提示（顶部居中）
+- Sticky 分页器（粘在底部）
+
+### TableRow.js - 表格行
+特性：
+- 悬停高亮效果
+- 操作列眼睛图标（仅悬停时显示，使用 opacity 动画）
+- 点击查看详情
+
+### Pagination.js - 分页组件
+功能：
+- 上一页/下一页导航
+- 每页行数选择（20/50/100/200）
+- 跳页功能（PageJumper）
+- Sticky 定位在底部
+- 显示当前页范围和总数
+
+### RowDetailModal.js - 记录详情
+特性：
+- 全屏模态框
+- 显示单条记录的所有字段
+- 系统字段标记（`_seq`, `_time`）
+- JSON 格式化显示
+- ESC 键和点击遮罩层关闭
+
+### ManifestModal.js - Manifest 弹窗
+特性：
+- 90vw 宽度弹窗（最大 1200px）
+- 包装 ManifestView 组件
+- ESC 键和点击外部关闭
+- 阻止背景滚动
+
+### ManifestView.js - Manifest 视图
+展示：
+- 统计卡片（总文件数、总大小、下一个文件号、最后序列号）
+- 各层级详情（L0-L6+）
+  - 层级标识（彩色徽章）
+  - 文件数和总大小
+  - Compaction Score（带进度条）
+  - 文件列表（文件号、大小、行数、Key 范围）
+- Compaction 统计（合并次数、读写字节等）
+- 只显示有文件的层级
+
+## 自定义 Hooks
+
+### useCellPopover.js
+用于单元格数据预览的 Popover：
+- 使用 dom-align 智能定位
+- 自动处理溢出和边界
+- 延迟隐藏避免闪烁
+- 支持 JSON 格式化显示
+
+### useTooltip.js
+用于表头和表名的 Tooltip：
+- 显示字段 comment 或表 comment
+- 使用 dom-align 定位在元素下方
+- 无延迟即时显示
+- 最大宽度 300px，自动换行
+
+## Preact + HTM 语法示例
+
+### 基本组件
+
+```javascript
+import { html } from 'htm/preact';
+
+export function MyComponent({ name }) {
+    return html`
+        <div class="hello">
+            <h1>Hello, ${name}!</h1>
+        </div>
+    `;
+}
+```
+
+### 使用 Hooks
+
+```javascript
+import { html } from 'htm/preact';
+import { useState, useEffect } from 'preact/hooks';
+
+export function Counter() {
+    const [count, setCount] = useState(0);
+
+    useEffect(() => {
+        console.log('Count changed:', count);
+    }, [count]);
+
+    return html`
+        <div>
+            <p>Count: ${count}</p>
+            <button onClick=${() => setCount(count + 1)}>
+                Increment
+            </button>
+        </div>
+    `;
+}
+```
+
+### 条件渲染
+
+```javascript
+${loading
+    ? html`<div class="loading">Loading...</div>`
+    : html`<div class="content">${data}</div>`
+}
+```
+
+### 列表渲染
+
+```javascript
+${items.map(item => html`
+    <div key=${item.id}>${item.name}</div>
+`)}
+```
+
+## 主题切换
+
+主题通过修改 `<html>` 元素的 `data-theme` 属性实现：
+
+```javascript
+// 切换到浅色主题
+document.documentElement.setAttribute('data-theme', 'light');
+
+// 切换回深色主题
+document.documentElement.removeAttribute('data-theme');
+```
+
+CSS 变量会根据主题自动切换：
+
+```css
+:root {
+    --bg-main: #0f0f1a;  /* 深色主题 */
+}
+
+:root[data-theme="light"] {
+    --bg-main: #f5f5f7;  /* 浅色主题 */
+}
+```
+
+## API 接口
+
+WebUI v2 使用的 API 端点：
+
+- `GET /api/tables` - 获取表列表（含行数统计）
+- `GET /api/tables/:name/schema` - 获取表 Schema
+- `GET /api/tables/:name/data?limit=100&offset=0` - 获取表数据（支持分页）
+- `GET /api/tables/:name/data/:seq` - 获取单条记录详情（完整数据）
+- `GET /api/tables/:name/manifest` - 获取 Manifest 信息（LSM-Tree 结构）
+
+## 开发建议
+
+### 添加新组件
+
+1. 在 `static/js/components/` 创建新文件
+2. 使用 `html` 标签模板语法
+3. 导出函数组件
+
+```javascript
+import { html } from 'htm/preact';
+
+export function NewComponent({ prop1, prop2 }) {
+    return html`
+        <div>Your content here</div>
+    `;
+}
+```
+
+### 内联样式 vs CSS
+
+推荐使用内联样式（通过 `styles` 对象）以获得更好的组件隔离性和主题支持：
+
+```javascript
+const styles = {
+    container: {
+        padding: '20px',
+        background: 'var(--bg-elevated)',
+        color: 'var(--text-primary)'
+    }
+};
+
+return html`<div style=${styles.container}>Content</div>`;
+```
+
+### 状态管理
+
+使用 `useState` 和 `useEffect` 管理组件状态：
+
+```javascript
+import { useState, useEffect } from 'preact/hooks';
+
+// 本地状态
+const [count, setCount] = useState(0);
+
+// 副作用处理
+useEffect(() => {
+    // 组件挂载时执行
+    console.log('Component mounted');
+
+    // 清理函数
+    return () => {
+        console.log('Component unmounted');
+    };
+}, []); // 空依赖数组表示只在挂载/卸载时执行
+```
+
+## 参考资料
+
+- [Preact 官方文档](https://preactjs.com/)
+- [HTM 文档](https://github.com/developit/htm)
+- [dom-align 文档](https://github.com/yiminghe/dom-align)
+- [ESM.sh CDN](https://esm.sh/)
+
+## License
+
+MIT
diff --git a/webui/static/css/styles.css b/webui/static/css/styles.css
index a0020f2..e89c202 100644
--- a/webui/static/css/styles.css
+++ b/webui/static/css/styles.css
@@ -1,4 +1,4 @@
-/* SRDB WebUI - Modern Design with Lit */
+/* SRDB WebUI v2 - Preact Edition */
 
 :root {
     /* 主色调 - 优雅的紫蓝色 */
@@ -30,12 +30,9 @@
 
     /* 阴影 */
     --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
-    --shadow-md:
-        0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
-    --shadow-lg:
-        0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
-    --shadow-xl:
-        0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
+    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
+    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
+    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
 
     /* 圆角 */
     --radius-sm: 6px;
@@ -66,12 +63,9 @@
 
     /* 阴影 - 浅色主题 */
     --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
-    --shadow-md:
-        0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
-    --shadow-lg:
-        0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
-    --shadow-xl:
-        0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
+    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
+    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
+    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
 }
 
 * {
@@ -80,19 +74,8 @@
     padding: 0;
 }
 
-:root {
-    /* 主题过渡动画 */
-    transition: background-color 0.3s ease, color 0.3s ease;
-}
-
 body {
-    font-family:
-        "Inter",
-        -apple-system,
-        BlinkMacSystemFont,
-        "Segoe UI",
-        Roboto,
-        sans-serif;
+    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
     background: var(--bg-main);
     color: var(--text-primary);
     line-height: 1.6;
@@ -105,3 +88,44 @@ body {
     overflow: hidden;
     transition: background-color 0.3s ease, color 0.3s ease;
 }
+
+#app {
+    height: 100vh;
+    display: flex;
+    flex-direction: column;
+}
+
+/* 自定义滚动条 */
+*::-webkit-scrollbar {
+    width: 8px;
+    height: 8px;
+}
+
+*::-webkit-scrollbar-track {
+    background: transparent;
+}
+
+*::-webkit-scrollbar-thumb {
+    background: var(--border-color);
+    border-radius: 4px;
+}
+
+*::-webkit-scrollbar-thumb:hover {
+    background: var(--border-hover);
+}
+
+/* Loading 状态 */
+.loading {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    height: 100%;
+    color: var(--text-secondary);
+}
+
+/* Empty 状态 */
+.empty {
+    text-align: center;
+    padding: 60px 20px;
+    color: var(--text-secondary);
+}
diff --git a/webui/static/index.html b/webui/static/index.html
index e64ef7f..b9ee519 100644
--- a/webui/static/index.html
+++ b/webui/static/index.html
@@ -1,37 +1,30 @@
-<!doctype html>
+<!DOCTYPE html>
 <html lang="zh-CN">
-    <head>
-        <meta charset="UTF-8" />
-        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-        <title>SRDB Web UI</title>
-        <link rel="preconnect" href="https://fonts.googleapis.com" />
-        <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
-        <link
-            href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap"
-            rel="stylesheet"
-        />
-        <link rel="stylesheet" href="/static/css/styles.css" />
-        
-        <!-- Import Map for Lit and local modules -->
-        <script type="importmap">
-        {
-            "imports": {
-                "lit": "https://cdn.jsdelivr.net/gh/lit/dist@3/core/lit-core.min.js",
-                "lit/": "https://cdn.jsdelivr.net/gh/lit/dist@3/",
-                "dom-align": "https://cdn.jsdelivr.net/npm/dom-align@1.12.4/+esm",
-                "~/": "/static/js/"
-            }
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>SRDB WebUI v2 - Preact</title>
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap" rel="stylesheet">
+    <link rel="stylesheet" href="/static/css/styles.css">
+
+    <!-- Import Map for Preact and HTM -->
+    <script type="importmap">
+    {
+        "imports": {
+            "preact": "https://esm.sh/preact@10.19.3",
+            "preact/": "https://esm.sh/preact@10.19.3/",
+            "htm/preact": "https://esm.sh/htm@3.1.1/preact?external=preact",
+            "dom-align": "https://cdn.jsdelivr.net/npm/dom-align@1.12.4/+esm"
         }
-        </script>
-    </head>
-    <body>
-        <!-- 应用容器 -->
-        <srdb-app></srdb-app>
+    }
+    </script>
+</head>
+<body>
+    <div id="app"></div>
 
-        <!-- Modal -->
-        <srdb-modal-dialog></srdb-modal-dialog>
-
-        <!-- 加载 Lit 组件 -->
-        <script type="module" src="/static/js/main.js"></script>
-    </body>
+    <!-- Load Preact App -->
+    <script type="module" src="/static/js/main.js"></script>
+</body>
 </html>
diff --git a/webui/static/js/common/api.js b/webui/static/js/common/api.js
deleted file mode 100644
index 56050c8..0000000
--- a/webui/static/js/common/api.js
+++ /dev/null
@@ -1,174 +0,0 @@
-/**
- * API 请求管理模块
- * 统一管理所有后端接口请求
- */
-
-const API_BASE = '/api';
-
-/**
- * 通用请求处理函数
- * @param {string} url - 请求 URL
- * @param {RequestInit} options - fetch 选项
- * @returns {Promise<any>}
- */
-async function request(url, options = {}) {
-  try {
-    const response = await fetch(url, {
-      headers: {
-        'Content-Type': 'application/json',
-        ...options.headers,
-      },
-      ...options,
-    });
-
-    if (!response.ok) {
-      const error = new Error(`HTTP ${response.status}: ${response.statusText}`);
-      error.status = response.status;
-      error.response = response;
-      throw error;
-    }
-
-    return await response.json();
-  } catch (error) {
-    console.error('API request failed:', url, error);
-    throw error;
-  }
-}
-
-/**
- * 表相关 API
- */
-export const tableAPI = {
-  /**
-   * 获取所有表列表
-   * @returns {Promise<Array>}
-   */
-  async list() {
-    return request(`${API_BASE}/tables`);
-  },
-
-  /**
-   * 获取表的 Schema
-   * @param {string} tableName - 表名
-   * @returns {Promise<Object>}
-   */
-  async getSchema(tableName) {
-    return request(`${API_BASE}/tables/${tableName}/schema`);
-  },
-
-  /**
-   * 获取表数据（分页）
-   * @param {string} tableName - 表名
-   * @param {Object} params - 查询参数
-   * @param {number} params.page - 页码
-   * @param {number} params.pageSize - 每页大小
-   * @param {string} params.select - 选择的列（逗号分隔）
-   * @returns {Promise<Object>}
-   */
-  async getData(tableName, { page = 1, pageSize = 20, select = '' } = {}) {
-    const params = new URLSearchParams({
-      page: page.toString(),
-      pageSize: pageSize.toString(),
-    });
-    
-    if (select) {
-      params.append('select', select);
-    }
-
-    return request(`${API_BASE}/tables/${tableName}/data?${params}`);
-  },
-
-  /**
-   * 获取单行数据详情
-   * @param {string} tableName - 表名
-   * @param {number} seq - 序列号
-   * @returns {Promise<Object>}
-   */
-  async getRow(tableName, seq) {
-    return request(`${API_BASE}/tables/${tableName}/data/${seq}`);
-  },
-
-  /**
-   * 获取表的 Manifest 信息
-   * @param {string} tableName - 表名
-   * @returns {Promise<Object>}
-   */
-  async getManifest(tableName) {
-    return request(`${API_BASE}/tables/${tableName}/manifest`);
-  },
-
-  /**
-   * 插入数据
-   * @param {string} tableName - 表名
-   * @param {Object} data - 数据对象
-   * @returns {Promise<Object>}
-   */
-  async insert(tableName, data) {
-    return request(`${API_BASE}/tables/${tableName}/data`, {
-      method: 'POST',
-      body: JSON.stringify(data),
-    });
-  },
-
-  /**
-   * 批量插入数据
-   * @param {string} tableName - 表名
-   * @param {Array<Object>} data - 数据数组
-   * @returns {Promise<Object>}
-   */
-  async batchInsert(tableName, data) {
-    return request(`${API_BASE}/tables/${tableName}/data/batch`, {
-      method: 'POST',
-      body: JSON.stringify(data),
-    });
-  },
-
-  /**
-   * 删除表
-   * @param {string} tableName - 表名
-   * @returns {Promise<Object>}
-   */
-  async delete(tableName) {
-    return request(`${API_BASE}/tables/${tableName}`, {
-      method: 'DELETE',
-    });
-  },
-
-  /**
-   * 获取表统计信息
-   * @param {string} tableName - 表名
-   * @returns {Promise<Object>}
-   */
-  async getStats(tableName) {
-    return request(`${API_BASE}/tables/${tableName}/stats`);
-  },
-};
-
-/**
- * 数据库相关 API
- */
-export const databaseAPI = {
-  /**
-   * 获取数据库信息
-   * @returns {Promise<Object>}
-   */
-  async getInfo() {
-    return request(`${API_BASE}/database/info`);
-  },
-
-  /**
-   * 获取数据库统计信息
-   * @returns {Promise<Object>}
-   */
-  async getStats() {
-    return request(`${API_BASE}/database/stats`);
-  },
-};
-
-/**
- * 导出默认 API 对象
- */
-export default {
-  table: tableAPI,
-  database: databaseAPI,
-};
diff --git a/webui/static/js/common/shared-styles.js b/webui/static/js/common/shared-styles.js
deleted file mode 100644
index a0f5395..0000000
--- a/webui/static/js/common/shared-styles.js
+++ /dev/null
@@ -1,89 +0,0 @@
-import { css } from 'lit';
-
-// 共享的基础样式
-export const sharedStyles = css`
-  * {
-    box-sizing: border-box;
-    margin: 0;
-    padding: 0;
-  }
-
-  /* 自定义滚动条样式 */
-  *::-webkit-scrollbar {
-    width: 8px;
-    height: 8px;
-  }
-
-  *::-webkit-scrollbar-track {
-    background: transparent;
-  }
-
-  *::-webkit-scrollbar-thumb {
-    background: rgba(255, 255, 255, 0.1);
-    border-radius: 4px;
-  }
-
-  *::-webkit-scrollbar-thumb:hover {
-    background: rgba(255, 255, 255, 0.15);
-  }
-
-  /* 通用状态样式 */
-  .empty {
-    text-align: center;
-    padding: 60px 20px;
-    color: var(--text-secondary);
-  }
-
-  .loading {
-    text-align: center;
-    padding: 60px 20px;
-    color: var(--text-secondary);
-  }
-`;
-
-// CSS 变量（可以在组件中使用，优先使用外部定义的变量）
-export const cssVariables = css`
-  :host {
-    /* 主色调 - 优雅的紫蓝色 */
-    --primary: var(--srdb-primary, #6366f1);
-    --primary-dark: var(--srdb-primary-dark, #4f46e5);
-    --primary-light: var(--srdb-primary-light, #818cf8);
-    --primary-bg: var(--srdb-primary-bg, rgba(99, 102, 241, 0.1));
-
-    /* 背景色 */
-    --bg-main: var(--srdb-bg-main, #0f0f1a);
-    --bg-surface: var(--srdb-bg-surface, #1a1a2e);
-    --bg-elevated: var(--srdb-bg-elevated, #222236);
-    --bg-hover: var(--srdb-bg-hover, #2a2a3e);
-
-    /* 文字颜色 */
-    --text-primary: var(--srdb-text-primary, #ffffff);
-    --text-secondary: var(--srdb-text-secondary, #a0a0b0);
-    --text-tertiary: var(--srdb-text-tertiary, #6b6b7b);
-
-    /* 边框和分隔线 */
-    --border-color: var(--srdb-border-color, rgba(255, 255, 255, 0.1));
-    --border-hover: var(--srdb-border-hover, rgba(255, 255, 255, 0.2));
-
-    /* 状态颜色 */
-    --success: var(--srdb-success, #10b981);
-    --warning: var(--srdb-warning, #f59e0b);
-    --danger: var(--srdb-danger, #ef4444);
-    --info: var(--srdb-info, #3b82f6);
-
-    /* 阴影 */
-    --shadow-sm: var(--srdb-shadow-sm, 0 1px 2px 0 rgba(0, 0, 0, 0.3));
-    --shadow-md: var(--srdb-shadow-md, 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3));
-    --shadow-lg: var(--srdb-shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3));
-    --shadow-xl: var(--srdb-shadow-xl, 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3));
-
-    /* 圆角 */
-    --radius-sm: var(--srdb-radius-sm, 6px);
-    --radius-md: var(--srdb-radius-md, 8px);
-    --radius-lg: var(--srdb-radius-lg, 12px);
-    --radius-xl: var(--srdb-radius-xl, 16px);
-
-    /* 过渡 */
-    --transition: var(--srdb-transition, all 0.2s cubic-bezier(0.4, 0, 0.2, 1));
-  }
-`;
diff --git a/webui/static/js/components/App.js b/webui/static/js/components/App.js
new file mode 100644
index 0000000..1604046
--- /dev/null
+++ b/webui/static/js/components/App.js
@@ -0,0 +1,148 @@
+import { html } from 'htm/preact';
+import { useState, useEffect } from 'preact/hooks';
+import { Sidebar } from './Sidebar.js';
+import { TableView } from './TableView.js';
+
+export function App() {
+    const [theme, setTheme] = useState('dark');
+    const [tables, setTables] = useState([]);
+    const [selectedTable, setSelectedTable] = useState(null);
+    const [loading, setLoading] = useState(true);
+
+    // 初始化主题
+    useEffect(() => {
+        const savedTheme = localStorage.getItem('srdb_theme') || 'dark';
+        setTheme(savedTheme);
+        if (savedTheme === 'light') {
+            document.documentElement.setAttribute('data-theme', 'light');
+        }
+    }, []);
+
+    // 加载表列表
+    useEffect(() => {
+        fetchTables();
+    }, []);
+
+    const fetchTables = async () => {
+        try {
+            setLoading(true);
+            const response = await fetch('/api/tables');
+            if (response.ok) {
+                const data = await response.json();
+                setTables(data.tables || []);
+                if (data.tables && data.tables.length > 0) {
+                    setSelectedTable(data.tables[0].name);
+                }
+            }
+        } catch (error) {
+            console.error('Failed to fetch tables:', error);
+        } finally {
+            setLoading(false);
+        }
+    };
+
+    const toggleTheme = () => {
+        const newTheme = theme === 'dark' ? 'light' : 'dark';
+        setTheme(newTheme);
+        localStorage.setItem('srdb_theme', newTheme);
+
+        if (newTheme === 'light') {
+            document.documentElement.setAttribute('data-theme', 'light');
+        } else {
+            document.documentElement.removeAttribute('data-theme');
+        }
+    };
+
+    const styles = {
+        container: {
+            display: 'flex',
+            height: '100vh',
+            overflow: 'hidden'
+        },
+        sidebar: {
+            width: '280px',
+            background: 'var(--bg-surface)',
+            borderRight: '1px solid var(--border-color)',
+            overflowY: 'auto',
+            overflowX: 'hidden',
+            padding: '16px 12px',
+            display: 'flex',
+            flexDirection: 'column',
+            gap: '8px'
+        },
+        sidebarHeader: {
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'space-between',
+            marginBottom: '4px'
+        },
+        sidebarTitle: {
+            fontSize: '18px',
+            fontWeight: 700,
+            letterSpacing: '-0.02em',
+            background: 'linear-gradient(135deg, #667eea, #764ba2)',
+            WebkitBackgroundClip: 'text',
+            WebkitTextFillColor: 'transparent',
+            margin: 0
+        },
+        themeToggle: {
+            width: '32px',
+            height: '32px',
+            background: 'var(--bg-elevated)',
+            border: '1px solid var(--border-color)',
+            borderRadius: 'var(--radius-md)',
+            cursor: 'pointer',
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            fontSize: '16px',
+            transition: 'var(--transition)'
+        },
+        main: {
+            flex: 1,
+            overflowY: 'auto',
+            overflowX: 'hidden',
+            background: 'var(--bg-main)',
+            padding: '24px'
+        }
+    };
+
+    return html`
+        <div style=${styles.container}>
+            <!-- 左侧侧边栏 -->
+            <div style=${styles.sidebar}>
+                <div style=${styles.sidebarHeader}>
+                    <h1 style=${styles.sidebarTitle}>SRDB Tables</h1>
+                    <button
+                        style=${styles.themeToggle}
+                        onClick=${toggleTheme}
+                        onMouseEnter=${(e) => e.target.style.background = 'var(--bg-hover)'}
+                        onMouseLeave=${(e) => e.target.style.background = 'var(--bg-elevated)'}
+                        title=${theme === 'dark' ? '切换到浅色主题' : '切换到深色主题'}
+                    >
+                        ${theme === 'dark' ? '☀️' : '🌙'}
+                    </button>
+                </div>
+                <${Sidebar}
+                    tables=${tables}
+                    selectedTable=${selectedTable}
+                    onSelectTable=${setSelectedTable}
+                    loading=${loading}
+                />
+            </div>
+
+            <!-- 右侧主内容区 -->
+            <div style=${styles.main}>
+                ${!selectedTable && html`
+                    <div class="empty">
+                        <p>Select a table from the sidebar</p>
+                    </div>
+                `}
+
+                ${selectedTable && html`
+                    <${TableView} tableName=${selectedTable} key=${selectedTable} />
+                `}
+            </div>
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/ColumnSelector.js b/webui/static/js/components/ColumnSelector.js
new file mode 100644
index 0000000..b869ab6
--- /dev/null
+++ b/webui/static/js/components/ColumnSelector.js
@@ -0,0 +1,186 @@
+import { html } from 'htm/preact';
+import { useState, useRef, useEffect } from 'preact/hooks';
+
+const styles = {
+    container: {
+        position: 'relative',
+        display: 'inline-block'
+    },
+    button: {
+        display: 'flex',
+        alignItems: 'center',
+        gap: '8px',
+        padding: '8px 16px',
+        background: 'var(--bg-elevated)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-md)',
+        color: 'var(--text-primary)',
+        fontSize: '14px',
+        fontWeight: 500,
+        cursor: 'pointer',
+        transition: 'var(--transition)'
+    },
+    dropdown: (isOpen) => ({
+        position: 'absolute',
+        top: 'calc(100% + 4px)',
+        right: 0,
+        minWidth: '240px',
+        maxHeight: '400px',
+        overflowY: 'auto',
+        background: 'var(--bg-elevated)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-md)',
+        boxShadow: 'var(--shadow-lg)',
+        zIndex: 100,
+        display: isOpen ? 'block' : 'none'
+    }),
+    menuItem: (isSelected) => ({
+        display: 'flex',
+        alignItems: 'center',
+        gap: '12px',
+        padding: '10px 16px',
+        cursor: 'pointer',
+        transition: 'var(--transition)',
+        background: isSelected ? 'var(--primary-bg)' : 'transparent',
+        color: 'var(--text-primary)',
+        fontSize: '14px'
+    }),
+    checkbox: (isSelected) => ({
+        width: '18px',
+        height: '18px',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        flexShrink: 0,
+        color: isSelected ? 'var(--primary)' : 'transparent'
+    }),
+    fieldInfo: {
+        flex: 1,
+        minWidth: 0,
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'space-between',
+        gap: '8px'
+    },
+    fieldName: {
+        display: 'flex',
+        alignItems: 'center',
+        gap: '6px',
+        flex: 1,
+        minWidth: 0,
+        overflow: 'hidden',
+        textOverflow: 'ellipsis',
+        whiteSpace: 'nowrap'
+    },
+    fieldType: {
+        fontSize: '10px',
+        color: 'var(--primary)',
+        background: 'var(--primary-bg)',
+        padding: '2px 5px',
+        borderRadius: 'var(--radius-sm)',
+        fontFamily: '"Courier New", monospace',
+        flexShrink: 0
+    }
+};
+
+export function ColumnSelector({ fields, selectedColumns, onToggle }) {
+    const [isOpen, setIsOpen] = useState(false);
+    const dropdownRef = useRef(null);
+    const buttonRef = useRef(null);
+
+    useEffect(() => {
+        const handleClickOutside = (event) => {
+            if (
+                dropdownRef.current &&
+                buttonRef.current &&
+                !dropdownRef.current.contains(event.target) &&
+                !buttonRef.current.contains(event.target)
+            ) {
+                setIsOpen(false);
+            }
+        };
+
+        if (isOpen) {
+            document.addEventListener('mousedown', handleClickOutside);
+        }
+
+        return () => {
+            document.removeEventListener('mousedown', handleClickOutside);
+        };
+    }, [isOpen]);
+
+    const selectedCount = selectedColumns.length;
+    const totalCount = fields?.length || 0;
+
+    return html`
+        <div style=${styles.container}>
+            <button
+                ref=${buttonRef}
+                style=${styles.button}
+                onClick=${() => setIsOpen(!isOpen)}
+                onMouseEnter=${(e) => {
+                    e.target.style.background = 'var(--bg-hover)';
+                    e.target.style.borderColor = 'var(--border-hover)';
+                }}
+                onMouseLeave=${(e) => {
+                    e.target.style.background = 'var(--bg-elevated)';
+                    e.target.style.borderColor = 'var(--border-color)';
+                }}
+            >
+                <span>Columns</span>
+                ${selectedCount > 0 && html`
+                    <span style=${{
+                        background: 'var(--primary)',
+                        color: '#fff',
+                        padding: '2px 6px',
+                        borderRadius: 'var(--radius-sm)',
+                        fontSize: '11px',
+                        fontWeight: 600
+                    }}>
+                        ${selectedCount}
+                    </span>
+                `}
+                <span style=${{
+                    fontSize: '12px',
+                    color: 'var(--text-secondary)',
+                    transition: 'transform 0.2s ease',
+                    transform: isOpen ? 'rotate(180deg)' : 'rotate(0deg)'
+                }}>▼</span>
+            </button>
+
+            <div ref=${dropdownRef} style=${styles.dropdown(isOpen)}>
+                ${fields?.map(field => {
+                    const isSelected = selectedColumns.includes(field.name);
+                    return html`
+                        <div
+                            key=${field.name}
+                            style=${styles.menuItem(isSelected)}
+                            onClick=${() => onToggle(field.name)}
+                            onMouseEnter=${(e) => {
+                                if (!isSelected) {
+                                    e.currentTarget.style.background = 'var(--bg-hover)';
+                                }
+                            }}
+                            onMouseLeave=${(e) => {
+                                if (!isSelected) {
+                                    e.currentTarget.style.background = 'transparent';
+                                }
+                            }}
+                        >
+                            <div style=${styles.checkbox(isSelected)}>
+                                ${isSelected ? '✓' : ''}
+                            </div>
+                            <div style=${styles.fieldInfo}>
+                                <div style=${styles.fieldName}>
+                                    <span>${field.name}</span>
+                                    ${field.indexed && html`<span style=${{ fontSize: '12px' }}>🔍</span>`}
+                                </div>
+                                <div style=${styles.fieldType}>${field.type}</div>
+                            </div>
+                        </div>
+                    `;
+                })}
+            </div>
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/CompactionStats.js b/webui/static/js/components/CompactionStats.js
new file mode 100644
index 0000000..975cdb8
--- /dev/null
+++ b/webui/static/js/components/CompactionStats.js
@@ -0,0 +1,52 @@
+import { html } from 'htm/preact';
+
+const styles = {
+    compactionStats: {
+        background: 'var(--bg-elevated)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-lg)',
+        padding: '16px'
+    },
+    compactionTitle: {
+        fontSize: '15px',
+        fontWeight: 600,
+        color: 'var(--text-primary)',
+        marginBottom: '12px'
+    },
+    compactionGrid: {
+        display: 'grid',
+        gridTemplateColumns: 'repeat(auto-fit, minmax(150px, 1fr))',
+        gap: '8px'
+    },
+    compactionItem: {
+        display: 'flex',
+        alignItems: 'center',
+        padding: '6px 0',
+        fontSize: '13px',
+        gap: "24px"
+    }
+};
+
+function formatNumber(num) {
+    return num.toLocaleString('zh-CN');
+}
+
+export function CompactionStats({ stats }) {
+    if (!stats) return null;
+
+    return html`
+        <div style=${styles.compactionStats}>
+            <div style=${styles.compactionTitle}>Compaction 统计</div>
+            <div style=${styles.compactionGrid}>
+                ${Object.entries(stats).map(([key, value]) => html`
+                    <div key=${key} style=${styles.compactionItem}>
+                        <span style=${{ color: 'var(--text-secondary)' }}>${key}</span>
+                        <span style=${{ color: 'var(--text-primary)', fontWeight: 500 }}>
+                            ${typeof value === 'number' ? formatNumber(value) : value}
+                        </span>
+                    </div>
+                `)}
+            </div>
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/DataTable.js b/webui/static/js/components/DataTable.js
new file mode 100644
index 0000000..4c06db6
--- /dev/null
+++ b/webui/static/js/components/DataTable.js
@@ -0,0 +1,203 @@
+import { html } from 'htm/preact';
+import { useState, useEffect } from 'preact/hooks';
+import { RowDetailModal } from './RowDetailModal.js';
+import { Pagination } from './Pagination.js';
+import { TableRow } from './TableRow.js';
+import { useCellPopover } from '../hooks/useCellPopover.js';
+import { useTooltip } from '../hooks/useTooltip.js';
+
+const styles = {
+    container: {
+        display: 'flex',
+        flexDirection: 'column',
+        gap: '12px',
+        position: 'relative'
+    },
+    loadingBar: {
+        position: 'absolute',
+        top: 0,
+        left: 0,
+        right: 0,
+        height: '3px',
+        background: 'var(--primary)',
+        zIndex: 100,
+        animation: 'loading-slide 1.5s ease-in-out infinite'
+    },
+    loadingOverlay: {
+        position: 'fixed',
+        top: '16px',
+        left: '50%',
+        transform: 'translateX(-50%)',
+        padding: '10px 20px',
+        background: 'var(--bg-elevated)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-md)',
+        boxShadow: 'var(--shadow-lg)',
+        zIndex: 999,
+        display: 'flex',
+        alignItems: 'center',
+        gap: '10px',
+        fontSize: '14px',
+        color: 'var(--text-primary)',
+        fontWeight: 500
+    },
+    tableWrapper: {
+        overflowX: 'auto',
+        background: 'var(--bg-surface)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-md)'
+    },
+    table: {
+        width: '100%',
+        borderCollapse: 'collapse',
+        fontSize: '13px'
+    },
+    th: {
+        background: 'var(--bg-elevated)',
+        color: 'var(--text-secondary)',
+        fontWeight: 600,
+        textAlign: 'left',
+        padding: '12px',
+        borderBottom: '1px solid var(--border-color)',
+        position: 'sticky',
+        top: 0,
+        zIndex: 1
+    }
+};
+
+export function DataTable({ schema, tableName, totalRows, selectedColumns = [] }) {
+    const [page, setPage] = useState(0);
+    const [pageSize, setPageSize] = useState(20);
+    const [data, setData] = useState([]);
+    const [loading, setLoading] = useState(false);
+    const [selectedSeq, setSelectedSeq] = useState(null);
+
+    const { showPopover, hidePopover } = useCellPopover();
+    const { showTooltip, hideTooltip } = useTooltip();
+
+    useEffect(() => {
+        fetchData();
+    }, [tableName, page, pageSize]);
+
+    const fetchData = async () => {
+        try {
+            setLoading(true);
+            const offset = page * pageSize;
+            const response = await fetch(`/api/tables/${tableName}/data?limit=${pageSize}&offset=${offset}`);
+            if (response.ok) {
+                const result = await response.json();
+                setData(result.data || []);
+            }
+        } catch (error) {
+            console.error('Failed to fetch data:', error);
+        } finally {
+            setLoading(false);
+        }
+    };
+
+    const getColumns = () => {
+        let columns = [];
+
+        if (selectedColumns && selectedColumns.length > 0) {
+            // 使用选中的列
+            columns = [...selectedColumns];
+        } else if (schema && schema.fields) {
+            // 没有选择时，显示所有字段
+            columns = schema.fields.map(f => f.name);
+        } else {
+            return ['_seq', '_time'];
+        }
+
+        // 过滤掉 _seq 和 _time（它们会被固定放到特定位置）
+        const filtered = columns.filter(c => c !== '_seq' && c !== '_time');
+
+        // _seq 在开头，其他字段在中间，_time 在倒数第二（Actions 列之前）
+        return ['_seq', ...filtered, '_time'];
+    };
+
+    const handleViewDetail = (seq) => {
+        setSelectedSeq(seq);
+    };
+
+    const handlePageSizeChange = (newPageSize) => {
+        setPageSize(newPageSize);
+        setPage(0);
+    };
+
+    const getFieldComment = (fieldName) => {
+        if (!schema || !schema.fields) return '';
+        const field = schema.fields.find(f => f.name === fieldName);
+        return field?.comment || '';
+    };
+
+    const columns = getColumns();
+
+    if (!data || data.length === 0) {
+        return html`<div class="empty"><p>暂无数据</p></div>`;
+    }
+
+    return html`
+        <div style=${styles.container}>
+            ${loading && html`
+                <div style=${styles.loadingOverlay}>
+                    <span style=${{ fontSize: '16px' }}>⏳</span>
+                    <span>加载中...</span>
+                </div>
+            `}
+
+            <div style=${styles.tableWrapper}>
+                <table style=${styles.table}>
+                    <thead>
+                        <tr>
+                            ${columns.map(col => {
+                                const comment = getFieldComment(col);
+                                return html`
+                                    <th
+                                        key=${col}
+                                        style=${styles.th}
+                                        onMouseEnter=${(e) => comment && showTooltip(e.currentTarget, comment)}
+                                        onMouseLeave=${hideTooltip}
+                                    >
+                                        ${col}
+                                    </th>
+                                `;
+                            })}
+                            <th style=${{ ...styles.th, textAlign: 'center' }}>操作</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        ${data.map((row, idx) => html`
+                            <${TableRow}
+                                key=${row._seq || idx}
+                                row=${row}
+                                columns=${columns}
+                                onViewDetail=${handleViewDetail}
+                                onShowPopover=${showPopover}
+                                onHidePopover=${hidePopover}
+                            />
+                        `)}
+                    </tbody>
+                </table>
+            </div>
+
+            <!-- 分页控件 -->
+            <${Pagination}
+                page=${page}
+                pageSize=${pageSize}
+                totalRows=${totalRows}
+                onPageChange=${setPage}
+                onPageSizeChange=${handlePageSizeChange}
+                onJumpToPage=${setPage}
+            />
+
+            <!-- 详情模态框 -->
+            ${selectedSeq !== null && html`
+                <${RowDetailModal}
+                    tableName=${tableName}
+                    seq=${selectedSeq}
+                    onClose=${() => setSelectedSeq(null)}
+                />
+            `}
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/FieldList.js b/webui/static/js/components/FieldList.js
new file mode 100644
index 0000000..1656e91
--- /dev/null
+++ b/webui/static/js/components/FieldList.js
@@ -0,0 +1,105 @@
+import { html } from 'htm/preact';
+
+const styles = {
+    schemaFields: {
+        borderTop: '1px solid var(--border-color)',
+        position: 'relative',
+        transition: 'var(--transition)'
+    },
+    verticalLine: {
+        content: '""',
+        position: 'absolute',
+        left: '16px',
+        top: 0,
+        bottom: '14px',
+        width: '1px',
+        background: 'var(--border-color)',
+        zIndex: 2
+    },
+    fieldItem: {
+        zIndex: 1,
+        display: 'flex',
+        alignItems: 'center',
+        gap: '8px',
+        padding: '4px 12px 4px 16px',
+        fontSize: '12px',
+        transition: 'var(--transition)',
+        position: 'relative'
+    },
+    horizontalLine: {
+        width: '8px',
+        height: '1px',
+        background: 'var(--border-color)'
+    },
+    fieldIndexIcon: {
+        display: 'inline-flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        fontSize: '12px',
+        flexShrink: 0
+    },
+    fieldName: {
+        fontWeight: 500,
+        color: 'var(--text-secondary)',
+        flex: 1,
+        display: 'flex',
+        alignItems: 'center',
+        gap: '4px'
+    },
+    fieldType: {
+        fontFamily: '"Courier New", monospace',
+        fontSize: '11px',
+        padding: '2px 6px',
+        background: 'var(--primary-bg)',
+        color: 'var(--primary)',
+        borderRadius: 'var(--radius-sm)',
+        fontWeight: 600
+    }
+};
+
+export function FieldList({ fields }) {
+    if (!fields || fields.length === 0) {
+        return null;
+    }
+
+    return html`
+        <div style=${styles.schemaFields}>
+            <!-- 垂直连接线 -->
+            <div style=${styles.verticalLine}></div>
+
+            ${fields.map((field) => {
+                return html`
+                    <div
+                        key=${field.name}
+                        style=${styles.fieldItem}
+                        onMouseEnter=${(e) => {
+                            e.currentTarget.style.background = 'var(--bg-hover)';
+                        }}
+                        onMouseLeave=${(e) => {
+                            e.currentTarget.style.background = 'transparent';
+                        }}
+                    >
+                        <!-- 水平连接线 -->
+                        <div style=${styles.horizontalLine}></div>
+
+                        <!-- 字段名称和索引图标 -->
+                        <span style=${styles.fieldName}>
+                            ${field.name}
+                            ${field.indexed && html`
+                                <span
+                                    style=${styles.fieldIndexIcon}
+                                    title="Indexed field"
+                                >
+                                    🔍
+                                </span>
+                            `}
+                        </span>
+
+                        <!-- 字段类型 -->
+                        <span style=${styles.fieldType}>${field.type}</span>
+                    </div>
+                `;
+            })}
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/FileCard.js b/webui/static/js/components/FileCard.js
new file mode 100644
index 0000000..1f88289
--- /dev/null
+++ b/webui/static/js/components/FileCard.js
@@ -0,0 +1,90 @@
+import { html } from 'htm/preact';
+
+const styles = {
+    fileCard: {
+        background: 'var(--bg-elevated)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-sm)',
+        padding: '10px',
+        transition: 'var(--transition)'
+    },
+    fileName: {
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'space-between',
+        marginBottom: '6px'
+    },
+    fileNameText: {
+        fontFamily: '"Courier New", monospace',
+        fontSize: '13px',
+        color: 'var(--text-primary)',
+        fontWeight: 500
+    },
+    fileLevelBadge: {
+        fontSize: '11px',
+        padding: '2px 8px',
+        background: 'var(--primary-bg)',
+        color: 'var(--primary)',
+        borderRadius: 'var(--radius-sm)',
+        fontWeight: 600,
+        fontFamily: '"Courier New", monospace'
+    },
+    fileDetail: {
+        display: 'flex',
+        flexDirection: 'column',
+        gap: '3px',
+        fontSize: '12px',
+        color: 'var(--text-secondary)'
+    },
+    fileDetailRow: {
+        display: 'flex',
+        justifyContent: 'space-between'
+    }
+};
+
+function formatBytes(bytes) {
+    if (bytes === 0) return '0 B';
+    const k = 1024;
+    const sizes = ['B', 'KB', 'MB', 'GB'];
+    const i = Math.floor(Math.log(bytes) / Math.log(k));
+    return (bytes / Math.pow(k, i)).toFixed(2) + ' ' + sizes[i];
+}
+
+function formatNumber(num) {
+    return num.toLocaleString('zh-CN');
+}
+
+export function FileCard({ file }) {
+    return html`
+        <div
+            style=${styles.fileCard}
+            onMouseEnter=${(e) => {
+                e.currentTarget.style.borderColor = 'var(--primary)';
+                e.currentTarget.style.boxShadow = '0 2px 8px rgba(0, 0, 0, 0.1)';
+            }}
+            onMouseLeave=${(e) => {
+                e.currentTarget.style.borderColor = 'var(--border-color)';
+                e.currentTarget.style.boxShadow = 'none';
+            }}
+        >
+            <div style=${styles.fileName}>
+                <span style=${styles.fileNameText}>${String(file.file_number).padStart(6, '0')}.sst</span>
+                <span style=${styles.fileLevelBadge}>L${file.level}</span>
+            </div>
+            <div style=${styles.fileDetail}>
+                <div style=${styles.fileDetailRow}>
+                    <span>Size:</span>
+                    <span>${formatBytes(file.file_size)}</span>
+                </div>
+                <div style=${styles.fileDetailRow}>
+                    <span>Rows:</span>
+                    <span>${formatNumber(file.row_count)}</span>
+                </div>
+                <div style=${styles.fileDetailRow}>
+                    <span>Seq Range:</span>
+                    <span>${formatNumber(file.min_key)} - ${formatNumber(file.max_key)}</span>
+                </div>
+            </div>
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/LevelCard.js b/webui/static/js/components/LevelCard.js
new file mode 100644
index 0000000..97faf06
--- /dev/null
+++ b/webui/static/js/components/LevelCard.js
@@ -0,0 +1,139 @@
+import { html } from 'htm/preact';
+import { FileCard } from './FileCard.js';
+
+const styles = {
+    levelSection: {
+        background: 'var(--bg-elevated)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-lg)',
+        marginBottom: '8px',
+        overflow: 'hidden'
+    },
+    levelHeader: {
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'space-between',
+        cursor: 'pointer',
+        padding: '14px 16px',
+        transition: 'var(--transition)',
+    },
+    levelHeaderLeft: {
+        display: 'flex',
+        alignItems: 'center',
+        gap: '12px',
+        flex: 1
+    },
+    expandIcon: (isExpanded) => ({
+        fontSize: '12px',
+        color: 'var(--text-secondary)',
+        transition: 'transform 0.2s ease',
+        userSelect: 'none',
+        transform: isExpanded ? 'rotate(90deg)' : 'rotate(0deg)'
+    }),
+    levelTitle: {
+        fontSize: '16px',
+        fontWeight: 600,
+        color: 'var(--text-primary)',
+        display: 'flex',
+        alignItems: 'center',
+        gap: '12px'
+    },
+    levelBadge: (level) => {
+        const colors = ['#667eea', '#764ba2', '#f093fb', '#4facfe'];
+        const bgColor = colors[level] || '#667eea';
+        return {
+            background: bgColor,
+            color: '#fff',
+            padding: '4px 10px',
+            borderRadius: 'var(--radius-sm)',
+            fontSize: '12px',
+            fontWeight: 600,
+            fontFamily: '"Courier New", monospace'
+        };
+    },
+    levelStats: {
+        display: 'flex',
+        gap: '20px',
+        fontSize: '13px',
+        color: 'var(--text-secondary)'
+    },
+    scoreBadge: (score) => ({
+        padding: '4px 8px',
+        borderRadius: 'var(--radius-sm)',
+        fontSize: '12px',
+        fontWeight: 600,
+        fontFamily: '"Courier New", monospace',
+        background: score > 1 ? '#fed7d7' : score > 0.8 ? '#feebc8' : '#c6f6d5',
+        color: score > 1 ? '#c53030' : score > 0.8 ? '#c05621' : '#22543d'
+    }),
+    filesContainer: (isExpanded) => ({
+        display: isExpanded ? 'block' : 'none',
+        padding: '12px',
+        background: 'var(--bg-surface)',
+        borderTop: '1px solid var(--border-color)',
+        borderRadius: '0 0 var(--radius-lg) var(--radius-lg)'
+    }),
+    filesGrid: {
+        display: 'grid',
+        gridTemplateColumns: 'repeat(auto-fill, minmax(280px, 1fr))',
+        gap: '8px'
+    }
+};
+
+function formatBytes(bytes) {
+    if (bytes === 0) return '0 B';
+    const k = 1024;
+    const sizes = ['B', 'KB', 'MB', 'GB'];
+    const i = Math.floor(Math.log(bytes) / Math.log(k));
+    return (bytes / Math.pow(k, i)).toFixed(2) + ' ' + sizes[i];
+}
+
+export function LevelCard({ level, isExpanded, onToggle }) {
+    return html`
+        <div style=${styles.levelSection}>
+            <div
+                style=${styles.levelHeader}
+                onClick=${onToggle}
+                onMouseEnter=${(e) => {
+                    e.currentTarget.style.background = 'var(--bg-hover)';
+                }}
+                onMouseLeave=${(e) => {
+                    e.currentTarget.style.background = 'transparent';
+                }}
+            >
+                <div style=${styles.levelHeaderLeft}>
+                    <span style=${styles.expandIcon(isExpanded)}>▶</span>
+                    <div style=${styles.levelTitle}>
+                        <span style=${styles.levelBadge(level.level)}>L${level.level}</span>
+                        <span>Level ${level.level}</span>
+                    </div>
+                </div>
+                <div style=${styles.levelStats}>
+                    <span>文件: ${level.file_count}</span>
+                    <span>大小: ${formatBytes(level.total_size)}</span>
+                    ${level.score > 0 && html`
+                        <span style=${styles.scoreBadge(level.score)}>
+                            Score: ${(level.score * 100).toFixed(0)}%
+                        </span>
+                    `}
+                </div>
+            </div>
+
+            ${level.files && level.files.length > 0 && html`
+                <div style=${styles.filesContainer(isExpanded)}>
+                    <div style=${styles.filesGrid}>
+                        ${level.files.map(file => html`
+                            <${FileCard} key=${file.file_number} file=${file} />
+                        `)}
+                    </div>
+                </div>
+            `}
+
+            ${(!level.files || level.files.length === 0) && html`
+                <div class="empty" style=${{ padding: '20px', textAlign: 'center' }}>
+                    <p style=${{ color: 'var(--text-tertiary)', fontSize: '13px' }}>此层级暂无文件</p>
+                </div>
+            `}
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/ManifestModal.js b/webui/static/js/components/ManifestModal.js
new file mode 100644
index 0000000..361787a
--- /dev/null
+++ b/webui/static/js/components/ManifestModal.js
@@ -0,0 +1,118 @@
+import { html } from 'htm/preact';
+import { useEffect } from 'preact/hooks';
+import { ManifestView } from './ManifestView.js';
+
+const styles = {
+    overlay: {
+        position: 'fixed',
+        top: 0,
+        left: 0,
+        right: 0,
+        bottom: 0,
+        background: 'rgba(0, 0, 0, 0.6)',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        zIndex: 1000,
+        padding: '20px'
+    },
+    modal: {
+        background: 'var(--bg-elevated)',
+        borderRadius: 'var(--radius-lg)',
+        boxShadow: 'var(--shadow-xl)',
+        width: '90vw',
+        maxWidth: '1200px',
+        maxHeight: '85vh',
+        display: 'flex',
+        flexDirection: 'column',
+        overflow: 'hidden'
+    },
+    header: {
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'space-between',
+        padding: '20px 24px',
+        borderBottom: '1px solid var(--border-color)'
+    },
+    title: {
+        fontSize: '20px',
+        fontWeight: 600,
+        color: 'var(--text-primary)',
+        margin: 0
+    },
+    closeButton: {
+        width: '32px',
+        height: '32px',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        background: 'transparent',
+        border: 'none',
+        borderRadius: 'var(--radius-sm)',
+        cursor: 'pointer',
+        fontSize: '20px',
+        color: 'var(--text-secondary)',
+        transition: 'var(--transition)'
+    },
+    content: {
+        flex: 1,
+        overflowY: 'auto',
+        padding: '20px 24px'
+    }
+};
+
+export function ManifestModal({ tableName, onClose }) {
+    // ESC 键关闭
+    useEffect(() => {
+        const handleEscape = (e) => {
+            if (e.key === 'Escape') {
+                onClose();
+            }
+        };
+
+        document.addEventListener('keydown', handleEscape);
+        return () => document.removeEventListener('keydown', handleEscape);
+    }, [onClose]);
+
+    // 阻止背景滚动
+    useEffect(() => {
+        document.body.style.overflow = 'hidden';
+        return () => {
+            document.body.style.overflow = '';
+        };
+    }, []);
+
+    const handleOverlayClick = (e) => {
+        if (e.target === e.currentTarget) {
+            onClose();
+        }
+    };
+
+    return html`
+        <div style=${styles.overlay} onClick=${handleOverlayClick}>
+            <div style=${styles.modal}>
+                <div style=${styles.header}>
+                    <h2 style=${styles.title}>Manifest - ${tableName}</h2>
+                    <button
+                        style=${styles.closeButton}
+                        onClick=${onClose}
+                        onMouseEnter=${(e) => {
+                            e.target.style.background = 'var(--bg-hover)';
+                            e.target.style.color = 'var(--text-primary)';
+                        }}
+                        onMouseLeave=${(e) => {
+                            e.target.style.background = 'transparent';
+                            e.target.style.color = 'var(--text-secondary)';
+                        }}
+                        title="关闭"
+                    >
+                        ✕
+                    </button>
+                </div>
+                <div style=${styles.content}>
+                    <${ManifestView} tableName=${tableName} />
+                </div>
+            </div>
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/ManifestView.js b/webui/static/js/components/ManifestView.js
new file mode 100644
index 0000000..169065a
--- /dev/null
+++ b/webui/static/js/components/ManifestView.js
@@ -0,0 +1,102 @@
+import { html } from 'htm/preact';
+import { useState, useEffect } from 'preact/hooks';
+import { LevelCard } from './LevelCard.js';
+import { StatCard } from './StatCard.js';
+import { CompactionStats } from './CompactionStats.js';
+
+const styles = {
+    container: {
+        display: 'flex',
+        flexDirection: 'column',
+        gap: '12px'
+    },
+    statsGrid: {
+        display: 'grid',
+        gridTemplateColumns: 'repeat(auto-fit, minmax(200px, 1fr))',
+        gap: '8px'
+    }
+};
+
+function formatBytes(bytes) {
+    if (bytes === 0) return '0 B';
+    const k = 1024;
+    const sizes = ['B', 'KB', 'MB', 'GB'];
+    const i = Math.floor(Math.log(bytes) / Math.log(k));
+    return (bytes / Math.pow(k, i)).toFixed(2) + ' ' + sizes[i];
+}
+
+function formatNumber(num) {
+    return num.toLocaleString('zh-CN');
+}
+
+export function ManifestView({ tableName }) {
+    const [manifest, setManifest] = useState(null);
+    const [loading, setLoading] = useState(true);
+    const [expandedLevels, setExpandedLevels] = useState(new Set());
+
+    useEffect(() => {
+        fetchManifest();
+        const interval = setInterval(fetchManifest, 5000); // 每5秒刷新
+        return () => clearInterval(interval);
+    }, [tableName]);
+
+    const fetchManifest = async () => {
+        try {
+            const response = await fetch(`/api/tables/${tableName}/manifest`);
+            if (response.ok) {
+                const data = await response.json();
+                setManifest(data);
+            }
+        } catch (error) {
+            console.error('Failed to fetch manifest:', error);
+        } finally {
+            setLoading(false);
+        }
+    };
+
+    const toggleLevel = (levelNum) => {
+        const newExpanded = new Set(expandedLevels);
+        if (newExpanded.has(levelNum)) {
+            newExpanded.delete(levelNum);
+        } else {
+            newExpanded.add(levelNum);
+        }
+        setExpandedLevels(newExpanded);
+    };
+
+    if (loading) {
+        return html`<div class="loading"><p>加载中...</p></div>`;
+    }
+
+    if (!manifest) {
+        return html`<div class="empty"><p>无法加载 Manifest 数据</p></div>`;
+    }
+
+    const totalFiles = manifest.levels?.reduce((sum, level) => sum + level.file_count, 0) || 0;
+    const totalSize = manifest.levels?.reduce((sum, level) => sum + level.total_size, 0) || 0;
+
+    return html`
+        <div style=${styles.container}>
+            <!-- 统计信息 -->
+            <div style=${styles.statsGrid}>
+                <${StatCard} label="总文件数" value=${formatNumber(totalFiles)} />
+                <${StatCard} label="总大小" value=${formatBytes(totalSize)} />
+                <${StatCard} label="下一个文件号" value=${formatNumber(manifest.next_file_number || 0)} />
+                <${StatCard} label="最后序列号" value=${formatNumber(manifest.last_sequence || 0)} />
+            </div>
+
+            <!-- Compaction 统计 -->
+            <${CompactionStats} stats=${manifest.compaction_stats} />
+
+            <!-- 各层级详情 -->
+            ${manifest.levels?.filter(level => level.file_count > 0).map(level => html`
+                <${LevelCard}
+                    key=${level.level}
+                    level=${level}
+                    isExpanded=${expandedLevels.has(level.level)}
+                    onToggle=${() => toggleLevel(level.level)}
+                />
+            `)}
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/PageJumper.js b/webui/static/js/components/PageJumper.js
new file mode 100644
index 0000000..ee0bdd9
--- /dev/null
+++ b/webui/static/js/components/PageJumper.js
@@ -0,0 +1,71 @@
+import { html } from 'htm/preact';
+import { Fragment } from 'preact';
+import { useState } from 'preact/hooks';
+
+const styles = {
+    jumpInput: {
+        width: '80px',
+        padding: '6px 10px',
+        background: 'var(--bg-elevated)',
+        color: 'var(--text-primary)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-sm)',
+        fontSize: '13px'
+    },
+    jumpButton: {
+        padding: '6px 12px',
+        background: 'var(--bg-elevated)',
+        color: 'var(--text-primary)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-sm)',
+        cursor: 'pointer',
+        fontSize: '13px',
+        transition: 'var(--transition)',
+        fontWeight: 500
+    }
+};
+
+export function PageJumper({ totalPages, onJump }) {
+    const [inputValue, setInputValue] = useState('');
+
+    const handleJump = () => {
+        const num = parseInt(inputValue);
+        if (num >= 1 && num <= totalPages) {
+            onJump(num - 1);
+            setInputValue('');
+        }
+    };
+
+    const handleKeyDown = (e) => {
+        if (e.key === 'Enter') {
+            handleJump();
+        }
+    };
+
+    return html`
+        <${Fragment}>
+            <input
+                type="number"
+                min="1"
+                max=${totalPages}
+                placeholder="跳转"
+                value=${inputValue}
+                onInput=${(e) => setInputValue(e.target.value)}
+                onKeyDown=${handleKeyDown}
+                style=${styles.jumpInput}
+            />
+            <button
+                style=${styles.jumpButton}
+                onClick=${handleJump}
+                onMouseEnter=${(e) => {
+                    e.target.style.background = 'var(--bg-hover)';
+                }}
+                onMouseLeave=${(e) => {
+                    e.target.style.background = 'var(--bg-elevated)';
+                }}
+            >
+                跳转
+            </button>
+        <//>
+    `;
+}
diff --git a/webui/static/js/components/Pagination.js b/webui/static/js/components/Pagination.js
new file mode 100644
index 0000000..af29a85
--- /dev/null
+++ b/webui/static/js/components/Pagination.js
@@ -0,0 +1,122 @@
+import { html } from 'htm/preact';
+import { PageJumper } from './PageJumper.js';
+
+const styles = {
+    pagination: {
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'space-between',
+        padding: '12px',
+        background: 'var(--bg-surface)',
+        borderRadius: 'var(--radius-md)',
+        border: '1px solid var(--border-color)',
+        position: 'sticky',
+        bottom: 0,
+        zIndex: 10,
+        boxShadow: 'var(--shadow-md)'
+    },
+    paginationInfo: {
+        fontSize: '13px',
+        color: 'var(--text-secondary)'
+    },
+    paginationButtons: {
+        display: 'flex',
+        gap: '8px',
+        alignItems: 'center'
+    },
+    pageButton: (disabled) => ({
+        padding: '6px 12px',
+        background: disabled ? 'var(--bg-surface)' : 'var(--bg-elevated)',
+        color: disabled ? 'var(--text-tertiary)' : 'var(--text-primary)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-sm)',
+        cursor: disabled ? 'not-allowed' : 'pointer',
+        fontSize: '13px',
+        transition: 'var(--transition)',
+        fontWeight: 500
+    }),
+    pageSizeSelect: {
+        padding: '6px 10px',
+        background: 'var(--bg-elevated)',
+        color: 'var(--text-primary)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-sm)',
+        fontSize: '13px',
+        cursor: 'pointer'
+    }
+};
+
+export function Pagination({
+    page,
+    pageSize,
+    totalRows,
+    onPageChange,
+    onPageSizeChange,
+    onJumpToPage
+}) {
+    const totalPages = Math.ceil(totalRows / pageSize);
+    const currentPage = page + 1;
+    const startRow = page * pageSize + 1;
+    const endRow = Math.min((page + 1) * pageSize, totalRows);
+
+    const handlePrevPage = () => {
+        if (page > 0) {
+            onPageChange(page - 1);
+        }
+    };
+
+    const handleNextPage = () => {
+        if (page < totalPages - 1) {
+            onPageChange(page + 1);
+        }
+    };
+
+    const handlePageSizeChange = (e) => {
+        onPageSizeChange(Number(e.target.value));
+    };
+
+    return html`
+        <div style=${styles.pagination}>
+            <div style=${styles.paginationInfo}>
+                显示 ${startRow}-${endRow} / 共 ${totalRows} 行
+            </div>
+            <div style=${styles.paginationButtons}>
+                <select
+                    value=${pageSize}
+                    onChange=${handlePageSizeChange}
+                    style=${styles.pageSizeSelect}
+                >
+                    <option value="10">10 / 页</option>
+                    <option value="20">20 / 页</option>
+                    <option value="50">50 / 页</option>
+                    <option value="100">100 / 页</option>
+                </select>
+                <button
+                    style=${styles.pageButton(page === 0)}
+                    onClick=${handlePrevPage}
+                    disabled=${page === 0}
+                    onMouseEnter=${(e) => !e.target.disabled && (e.target.style.background = 'var(--bg-hover)')}
+                    onMouseLeave=${(e) => !e.target.disabled && (e.target.style.background = 'var(--bg-elevated)')}
+                >
+                    上一页
+                </button>
+                <span style=${{ fontSize: '13px', color: 'var(--text-secondary)' }}>
+                    ${currentPage} / ${totalPages}
+                </span>
+                <${PageJumper}
+                    totalPages=${totalPages}
+                    onJump=${onJumpToPage}
+                />
+                <button
+                    style=${styles.pageButton(page >= totalPages - 1)}
+                    onClick=${handleNextPage}
+                    disabled=${page >= totalPages - 1}
+                    onMouseEnter=${(e) => !e.target.disabled && (e.target.style.background = 'var(--bg-hover)')}
+                    onMouseLeave=${(e) => !e.target.disabled && (e.target.style.background = 'var(--bg-elevated)')}
+                >
+                    下一页
+                </button>
+            </div>
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/RowDetailModal.js b/webui/static/js/components/RowDetailModal.js
new file mode 100644
index 0000000..afa9ae7
--- /dev/null
+++ b/webui/static/js/components/RowDetailModal.js
@@ -0,0 +1,224 @@
+import { html } from 'htm/preact';
+import { useState, useEffect, useRef } from 'preact/hooks';
+
+const styles = {
+    overlay: {
+        position: 'fixed',
+        top: 0,
+        left: 0,
+        right: 0,
+        bottom: 0,
+        background: 'rgba(0, 0, 0, 0.5)',
+        backdropFilter: 'blur(4px)',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        zIndex: 10000,
+        padding: '20px'
+    },
+    modal: {
+        background: 'var(--bg-elevated)',
+        borderRadius: 'var(--radius-lg)',
+        boxShadow: 'var(--shadow-xl)',
+        maxWidth: '800px',
+        width: '100%',
+        maxHeight: '90vh',
+        display: 'flex',
+        flexDirection: 'column',
+        border: '1px solid var(--border-color)'
+    },
+    header: {
+        padding: '20px',
+        borderBottom: '1px solid var(--border-color)',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'space-between'
+    },
+    title: {
+        fontSize: '18px',
+        fontWeight: 600,
+        color: 'var(--text-primary)',
+        margin: 0
+    },
+    closeButton: {
+        background: 'none',
+        border: 'none',
+        fontSize: '24px',
+        color: 'var(--text-secondary)',
+        cursor: 'pointer',
+        padding: '4px 8px',
+        borderRadius: 'var(--radius-sm)',
+        transition: 'var(--transition)',
+        lineHeight: 1
+    },
+    content: {
+        padding: '20px',
+        overflowY: 'auto',
+        flex: 1
+    },
+    fieldGroup: {
+        marginBottom: '16px',
+        padding: '12px',
+        background: 'var(--bg-surface)',
+        borderRadius: 'var(--radius-md)',
+        border: '1px solid var(--border-color)'
+    },
+    fieldLabel: {
+        fontSize: '12px',
+        fontWeight: 600,
+        color: 'var(--text-secondary)',
+        textTransform: 'uppercase',
+        marginBottom: '4px',
+        display: 'flex',
+        alignItems: 'center',
+        gap: '6px'
+    },
+    fieldValue: {
+        fontSize: '14px',
+        color: 'var(--text-primary)',
+        wordBreak: 'break-word',
+        fontFamily: '"Courier New", monospace',
+        whiteSpace: 'pre-wrap',
+        lineHeight: 1.5
+    },
+    metaTag: {
+        display: 'inline-block',
+        padding: '2px 6px',
+        fontSize: '10px',
+        fontWeight: 600,
+        borderRadius: 'var(--radius-sm)',
+        background: 'var(--primary-bg)',
+        color: 'var(--primary)',
+        marginLeft: '6px'
+    }
+};
+
+export function RowDetailModal({ tableName, seq, onClose }) {
+    const overlayRef = useRef(null);
+    const [rowData, setRowData] = useState(null);
+    const [loading, setLoading] = useState(true);
+
+    useEffect(() => {
+        fetchRowData();
+    }, [tableName, seq]);
+
+    // ESC 键关闭
+    useEffect(() => {
+        const handleKeyDown = (e) => {
+            if (e.key === 'Escape') {
+                onClose();
+            }
+        };
+        document.addEventListener('keydown', handleKeyDown);
+        return () => document.removeEventListener('keydown', handleKeyDown);
+    }, [onClose]);
+
+    const fetchRowData = async () => {
+        try {
+            setLoading(true);
+            const response = await fetch(`/api/tables/${tableName}/data/${seq}`);
+            if (response.ok) {
+                const data = await response.json();
+                setRowData(data);
+            }
+        } catch (error) {
+            console.error('Failed to fetch row data:', error);
+        } finally {
+            setLoading(false);
+        }
+    };
+
+    const handleOverlayClick = (e) => {
+        if (e.target === overlayRef.current) {
+            onClose();
+        }
+    };
+
+    const formatTime = (nanoTime) => {
+        if (!nanoTime) return '';
+        const date = new Date(nanoTime / 1000000);
+        return date.toLocaleString('zh-CN', {
+            year: 'numeric',
+            month: '2-digit',
+            day: '2-digit',
+            hour: '2-digit',
+            minute: '2-digit',
+            second: '2-digit',
+            hour12: false
+        });
+    };
+
+    const formatValue = (value, key) => {
+        if (value === null) return 'null';
+        if (value === undefined) return 'undefined';
+
+        if (key === '_time') {
+            return formatTime(value);
+        }
+
+        if (typeof value === 'object') {
+            try {
+                return JSON.stringify(value, null, 2);
+            } catch (e) {
+                return '[Object]';
+            }
+        }
+
+        return String(value);
+    };
+
+    const renderField = (key, value) => {
+        const isMeta = key === '_seq' || key === '_time';
+
+        return html`
+            <div key=${key} style=${styles.fieldGroup}>
+                <div style=${styles.fieldLabel}>
+                    ${key}
+                    ${isMeta && html`<span style=${styles.metaTag}>系统字段</span>`}
+                </div>
+                <div style=${styles.fieldValue}>
+                    ${formatValue(value, key)}
+                </div>
+            </div>
+        `;
+    };
+
+    return html`
+        <div
+            ref=${overlayRef}
+            style=${styles.overlay}
+            onClick=${handleOverlayClick}
+        >
+            <div style=${styles.modal}>
+                <div style=${styles.header}>
+                    <h3 style=${styles.title}>记录详情 - ${tableName}</h3>
+                    <button
+                        style=${styles.closeButton}
+                        onClick=${onClose}
+                        onMouseEnter=${(e) => e.target.style.background = 'var(--bg-hover)'}
+                        onMouseLeave=${(e) => e.target.style.background = 'none'}
+                    >
+                        ×
+                    </button>
+                </div>
+                <div style=${styles.content}>
+                    ${loading && html`
+                        <div class="loading" style=${{ textAlign: 'center', padding: '40px' }}>
+                            <p>加载中...</p>
+                        </div>
+                    `}
+                    ${!loading && rowData && html`
+                        <div>
+                            ${Object.entries(rowData).map(([key, value]) => renderField(key, value))}
+                        </div>
+                    `}
+                    ${!loading && !rowData && html`
+                        <div class="empty" style=${{ textAlign: 'center', padding: '40px' }}>
+                            <p>未找到数据</p>
+                        </div>
+                    `}
+                </div>
+            </div>
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/Sidebar.js b/webui/static/js/components/Sidebar.js
new file mode 100644
index 0000000..33d8a70
--- /dev/null
+++ b/webui/static/js/components/Sidebar.js
@@ -0,0 +1,31 @@
+import { html } from 'htm/preact';
+import { TableItem } from './TableItem.js';
+
+export function Sidebar({ tables, selectedTable, onSelectTable, loading }) {
+    if (loading) {
+        return html`
+            <div class="loading">
+                <p>加载中...</p>
+            </div>
+        `;
+    }
+
+    if (tables.length === 0) {
+        return html`
+            <div class="empty">
+                <p>暂无数据表</p>
+            </div>
+        `;
+    }
+
+    return html`
+        ${tables.map(table => html`
+            <${TableItem}
+                key=${table.name}
+                table=${table}
+                isSelected=${selectedTable === table.name}
+                onSelect=${() => onSelectTable(table.name)}
+            />
+        `)}
+    `;
+}
diff --git a/webui/static/js/components/StatCard.js b/webui/static/js/components/StatCard.js
new file mode 100644
index 0000000..6d23950
--- /dev/null
+++ b/webui/static/js/components/StatCard.js
@@ -0,0 +1,33 @@
+import { html } from 'htm/preact';
+
+const styles = {
+    statCard: {
+        background: 'var(--bg-elevated)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-md)',
+        padding: '12px',
+        transition: 'var(--transition)'
+    },
+    statLabel: {
+        fontSize: '12px',
+        color: 'var(--text-secondary)',
+        marginBottom: '6px',
+        textTransform: 'uppercase',
+        fontWeight: 600
+    },
+    statValue: {
+        fontSize: '22px',
+        fontWeight: 600,
+        color: 'var(--primary)',
+        fontFamily: '"Courier New", monospace'
+    }
+};
+
+export function StatCard({ label, value }) {
+    return html`
+        <div style=${styles.statCard}>
+            <div style=${styles.statLabel}>${label}</div>
+            <div style=${styles.statValue}>${value}</div>
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/TableCell.js b/webui/static/js/components/TableCell.js
new file mode 100644
index 0000000..57c8c23
--- /dev/null
+++ b/webui/static/js/components/TableCell.js
@@ -0,0 +1,72 @@
+import { html } from 'htm/preact';
+
+const styles = {
+    td: {
+        padding: '10px 12px',
+        borderBottom: '1px solid var(--border-color)',
+        color: 'var(--text-primary)',
+        maxWidth: '300px',
+        overflow: 'hidden',
+        textOverflow: 'ellipsis',
+        whiteSpace: 'nowrap',
+        cursor: 'pointer'
+    }
+};
+
+function formatValue(value, col) {
+    if (col === '_time') {
+        return formatTime(value);
+    }
+
+    if (value === null) return 'null';
+    if (value === undefined) return 'undefined';
+
+    if (typeof value === 'object') {
+        try {
+            return JSON.stringify(value, null, 2);
+        } catch (e) {
+            return '[Object]';
+        }
+    }
+
+    return String(value);
+}
+
+function formatTime(nanoTime) {
+    if (!nanoTime) return '';
+    const date = new Date(nanoTime / 1000000);
+    const year = date.getFullYear();
+    const month = String(date.getMonth() + 1).padStart(2, '0');
+    const day = String(date.getDate()).padStart(2, '0');
+    const hours = String(date.getHours()).padStart(2, '0');
+    const minutes = String(date.getMinutes()).padStart(2, '0');
+    const seconds = String(date.getSeconds()).padStart(2, '0');
+    return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
+}
+
+export function TableCell({ value, column, isTruncated, onShowPopover, onHidePopover }) {
+    const formattedValue = formatValue(value, column);
+
+    const handleMouseEnter = (e) => {
+        if (onShowPopover) {
+            onShowPopover(e, formattedValue);
+        }
+    };
+
+    const handleMouseLeave = () => {
+        if (onHidePopover) {
+            onHidePopover();
+        }
+    };
+
+    return html`
+        <td
+            style=${styles.td}
+            onMouseEnter=${handleMouseEnter}
+            onMouseLeave=${handleMouseLeave}
+        >
+            ${formattedValue}
+            ${isTruncated && html`<span style=${{ marginLeft: '4px', fontSize: '10px' }}>✂️</span>`}
+        </td>
+    `;
+}
diff --git a/webui/static/js/components/TableItem.js b/webui/static/js/components/TableItem.js
new file mode 100644
index 0000000..67e4aa6
--- /dev/null
+++ b/webui/static/js/components/TableItem.js
@@ -0,0 +1,130 @@
+import { html } from 'htm/preact';
+import { useState } from 'preact/hooks';
+import { FieldList } from './FieldList.js';
+
+const styles = {
+    tableItem: (isSelected, isExpanded) => ({
+        background: 'var(--bg-elevated)',
+        border: isSelected ? '1px solid var(--primary)' : '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-md)',
+        overflow: 'hidden',
+        transition: 'var(--transition)',
+        boxShadow: isSelected ? '0 0 0 1px var(--primary)' : 'none'
+    }),
+    tableHeader: (isSelected) => ({
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'space-between',
+        paddingLeft: '4px',
+        paddingRight: '12px',
+        cursor: 'pointer',
+        transition: 'var(--transition)',
+        background: isSelected ? 'var(--primary-bg)' : 'transparent'
+    }),
+    tableHeaderLeft: {
+        display: 'flex',
+        alignItems: 'center',
+        gap: '8px',
+        flex: 1,
+        minWidth: 0
+    },
+    expandIcon: (isExpanded) => ({
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        width: '32px',
+        height: '32px',
+        fontSize: '12px',
+        transition: 'var(--transition)',
+        flexShrink: 0,
+        borderRadius: 'var(--radius-sm)',
+        cursor: 'pointer',
+        color: isExpanded ? 'var(--primary)' : 'var(--text-secondary)',
+        transform: isExpanded ? 'rotate(90deg)' : 'rotate(0deg)',
+        marginLeft: '-4px'
+    }),
+    tableName: {
+        fontWeight: 500,
+        color: 'var(--text-primary)',
+        whiteSpace: 'nowrap',
+        overflow: 'hidden',
+        textOverflow: 'ellipsis'
+    },
+    tableCount: {
+        fontSize: '12px',
+        color: 'var(--text-tertiary)',
+        whiteSpace: 'nowrap',
+        flexShrink: 0
+    }
+};
+
+export function TableItem({ table, isSelected, onSelect }) {
+    const [isExpanded, setIsExpanded] = useState(false);
+
+    const toggleExpand = (e) => {
+        e.stopPropagation();
+        setIsExpanded(!isExpanded);
+    };
+
+    return html`
+        <div
+            style=${styles.tableItem(isSelected, isExpanded)}
+            onMouseEnter=${(e) => {
+                if (!isSelected) {
+                    e.currentTarget.style.borderColor = 'var(--border-hover)';
+                }
+            }}
+            onMouseLeave=${(e) => {
+                if (!isSelected) {
+                    e.currentTarget.style.borderColor = 'var(--border-color)';
+                }
+            }}
+        >
+            <!-- 表头 -->
+            <div
+                style=${styles.tableHeader(isSelected)}
+                onClick=${onSelect}
+                onMouseEnter=${(e) => {
+                    if (!isSelected) {
+                        e.currentTarget.style.background = 'var(--bg-hover)';
+                    }
+                }}
+                onMouseLeave=${(e) => {
+                    if (!isSelected) {
+                        e.currentTarget.style.background = 'transparent';
+                    }
+                }}
+            >
+                <div style=${styles.tableHeaderLeft}>
+                    <span
+                        style=${styles.expandIcon(isExpanded)}
+                        onClick=${toggleExpand}
+                        onMouseEnter=${(e) => {
+                            e.currentTarget.style.background = 'var(--bg-hover)';
+                            if (!isExpanded) {
+                                e.currentTarget.style.color = 'var(--text-primary)';
+                            }
+                        }}
+                        onMouseLeave=${(e) => {
+                            e.currentTarget.style.background = 'transparent';
+                            if (!isExpanded) {
+                                e.currentTarget.style.color = 'var(--text-secondary)';
+                            }
+                        }}
+                    >
+                        ▶
+                    </span>
+                    <span style=${styles.tableName}>${table.name}</span>
+                </div>
+                <span style=${styles.tableCount}>
+                    ${table.fields?.length || 0} fields
+                </span>
+            </div>
+
+            <!-- 字段列表 -->
+            ${isExpanded && html`
+                <${FieldList} fields=${table.fields} />
+            `}
+        </div>
+    `;
+}
diff --git a/webui/static/js/components/TableRow.js b/webui/static/js/components/TableRow.js
new file mode 100644
index 0000000..308c537
--- /dev/null
+++ b/webui/static/js/components/TableRow.js
@@ -0,0 +1,68 @@
+import { html } from 'htm/preact';
+import { useState } from 'preact/hooks';
+import { TableCell } from './TableCell.js';
+
+const styles = {
+    td: {
+        padding: '10px 12px',
+        borderBottom: '1px solid var(--border-color)',
+        color: 'var(--text-primary)',
+        textAlign: 'center'
+    },
+    iconButton: (isRowHovered, isButtonHovered) => ({
+        width: '28px',
+        height: '28px',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        background: isButtonHovered ? 'var(--primary)' : 'var(--bg-elevated)',
+        color: isButtonHovered ? '#fff' : 'var(--primary)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-sm)',
+        cursor: 'pointer',
+        fontSize: '14px',
+        transition: 'all 0.2s ease',
+        opacity: isRowHovered ? 1 : 0,
+        pointerEvents: isRowHovered ? 'auto' : 'none'
+    })
+};
+
+export function TableRow({ row, columns, onViewDetail, onShowPopover, onHidePopover }) {
+    const [isRowHovered, setIsRowHovered] = useState(false);
+    const [isButtonHovered, setIsButtonHovered] = useState(false);
+
+    return html`
+        <tr
+            onMouseEnter=${(e) => {
+                e.currentTarget.style.background = 'var(--bg-hover)';
+                setIsRowHovered(true);
+            }}
+            onMouseLeave=${(e) => {
+                e.currentTarget.style.background = 'transparent';
+                setIsRowHovered(false);
+            }}
+        >
+            ${columns.map(col => html`
+                <${TableCell}
+                    key=${col}
+                    value=${row[col]}
+                    column=${col}
+                    isTruncated=${row[col + '_truncated']}
+                    onShowPopover=${onShowPopover}
+                    onHidePopover=${onHidePopover}
+                />
+            `)}
+            <td style=${styles.td}>
+                <button
+                    style=${styles.iconButton(isRowHovered, isButtonHovered)}
+                    onClick=${() => onViewDetail(row._seq)}
+                    onMouseEnter=${() => setIsButtonHovered(true)}
+                    onMouseLeave=${() => setIsButtonHovered(false)}
+                    title="查看详情"
+                >
+                    👁
+                </button>
+            </td>
+        </tr>
+    `;
+}
diff --git a/webui/static/js/components/TableView.js b/webui/static/js/components/TableView.js
new file mode 100644
index 0000000..0a4247a
--- /dev/null
+++ b/webui/static/js/components/TableView.js
@@ -0,0 +1,183 @@
+import { html } from 'htm/preact';
+import { useState, useEffect } from 'preact/hooks';
+import { DataTable } from './DataTable.js';
+import { ColumnSelector } from './ColumnSelector.js';
+import { ManifestModal } from './ManifestModal.js';
+import { useTooltip } from '../hooks/useTooltip.js';
+
+const styles = {
+    container: {
+        display: 'flex',
+        flexDirection: 'column',
+        gap: '20px'
+    },
+    section: {
+        display: 'flex',
+        flexDirection: 'column',
+        gap: '16px'
+    },
+    sectionTitle: {
+        fontSize: '16px',
+        fontWeight: 600,
+        color: 'var(--text-primary)'
+    },
+    manifestButton: {
+        display: 'flex',
+        alignItems: 'center',
+        gap: '6px',
+        padding: '8px 16px',
+        background: 'var(--bg-elevated)',
+        border: '1px solid var(--border-color)',
+        borderRadius: 'var(--radius-md)',
+        color: 'var(--text-primary)',
+        fontSize: '14px',
+        fontWeight: 500,
+        cursor: 'pointer',
+        transition: 'var(--transition)'
+    }
+};
+
+export function TableView({ tableName }) {
+    const [schema, setSchema] = useState(null);
+    const [totalRows, setTotalRows] = useState(0);
+    const [loading, setLoading] = useState(true);
+    const [selectedColumns, setSelectedColumns] = useState([]);
+    const [showManifest, setShowManifest] = useState(false);
+
+    const { showTooltip, hideTooltip } = useTooltip();
+
+    useEffect(() => {
+        fetchTableInfo();
+    }, [tableName]);
+
+    useEffect(() => {
+        // 加载保存的列选择
+        if (tableName && schema) {
+            const saved = loadSelectedColumns();
+            if (saved && saved.length > 0) {
+                const validColumns = saved.filter(col =>
+                    schema.fields.some(field => field.name === col)
+                );
+                if (validColumns.length > 0) {
+                    setSelectedColumns(validColumns);
+                }
+            }
+        }
+    }, [tableName, schema]);
+
+    const fetchTableInfo = async () => {
+        try {
+            setLoading(true);
+
+            // 获取 Schema
+            const schemaResponse = await fetch(`/api/tables/${tableName}/schema`);
+            if (schemaResponse.ok) {
+                const schemaData = await schemaResponse.json();
+                setSchema(schemaData);
+            }
+
+            // 获取数据行数（通过一次小查询）
+            const dataResponse = await fetch(`/api/tables/${tableName}/data?limit=1`);
+            if (dataResponse.ok) {
+                const data = await dataResponse.json();
+                setTotalRows(data.totalRows || 0);
+            }
+        } catch (error) {
+            console.error('Failed to fetch table info:', error);
+        } finally {
+            setLoading(false);
+        }
+    };
+
+    const toggleColumn = (columnName) => {
+        const index = selectedColumns.indexOf(columnName);
+        let newSelection;
+        if (index > -1) {
+            newSelection = selectedColumns.filter(c => c !== columnName);
+        } else {
+            newSelection = [...selectedColumns, columnName];
+        }
+        setSelectedColumns(newSelection);
+        saveSelectedColumns(newSelection);
+    };
+
+    const saveSelectedColumns = (columns) => {
+        if (!tableName) return;
+        const key = `srdb_columns_${tableName}`;
+        localStorage.setItem(key, JSON.stringify(columns));
+    };
+
+    const loadSelectedColumns = () => {
+        if (!tableName) return null;
+        const key = `srdb_columns_${tableName}`;
+        const saved = localStorage.getItem(key);
+        return saved ? JSON.parse(saved) : null;
+    };
+
+    if (loading) {
+        return html`<div class="loading"><p>加载中...</p></div>`;
+    }
+
+    return html`
+        <div style=${styles.container}>
+            <div style=${styles.section}>
+                <div style=${{ ...styles.sectionTitle, display: 'flex', alignItems: 'center', justifyContent: 'space-between' }}>
+                    <div>
+                        <span
+                            style=${{ cursor: schema?.comment ? 'help' : 'default' }}
+                            onMouseEnter=${(e) => schema?.comment && showTooltip(e.currentTarget, schema.comment)}
+                            onMouseLeave=${hideTooltip}
+                        >
+                            ${tableName}
+                        </span>
+                        <span style=${{ fontSize: '12px', fontWeight: 400, color: 'var(--text-secondary)', marginLeft: '8px' }}>
+                            (共 ${formatCount(totalRows)} 行)
+                        </span>
+                    </div>
+                    <div style=${{ display: 'flex', gap: '8px' }}>
+                        <button
+                            style=${styles.manifestButton}
+                            onClick=${() => setShowManifest(true)}
+                            onMouseEnter=${(e) => {
+                                e.target.style.background = 'var(--bg-hover)';
+                                e.target.style.borderColor = 'var(--border-hover)';
+                            }}
+                            onMouseLeave=${(e) => {
+                                e.target.style.background = 'var(--bg-elevated)';
+                                e.target.style.borderColor = 'var(--border-color)';
+                            }}
+                        >
+                            📊 Manifest
+                        </button>
+                        ${schema && html`
+                            <${ColumnSelector}
+                                fields=${schema.fields}
+                                selectedColumns=${selectedColumns}
+                                onToggle=${toggleColumn}
+                            />
+                        `}
+                    </div>
+                </div>
+                <${DataTable}
+                    schema=${schema}
+                    tableName=${tableName}
+                    totalRows=${totalRows}
+                    selectedColumns=${selectedColumns}
+                />
+            </div>
+
+            ${showManifest && html`
+                <${ManifestModal}
+                    tableName=${tableName}
+                    onClose=${() => setShowManifest(false)}
+                />
+            `}
+        </div>
+    `;
+}
+
+function formatCount(count) {
+    if (count >= 1000000) return (count / 1000000).toFixed(1) + 'M';
+    if (count >= 1000) return (count / 1000).toFixed(1) + 'K';
+    return count.toString();
+}
diff --git a/webui/static/js/components/app.js b/webui/static/js/components/app.js
deleted file mode 100644
index addb0e4..0000000
--- a/webui/static/js/components/app.js
+++ /dev/null
@@ -1,145 +0,0 @@
-import { LitElement, html, css } from 'lit';
-import { sharedStyles, cssVariables } from '~/common/shared-styles.js';
-
-export class AppContainer extends LitElement {
-  static properties = {
-    mobileMenuOpen: { type: Boolean }
-  };
-
-  constructor() {
-    super();
-    this.mobileMenuOpen = false;
-  }
-
-  toggleMobileMenu() {
-    this.mobileMenuOpen = !this.mobileMenuOpen;
-  }
-
-  static styles = [
-    sharedStyles,
-    cssVariables,
-    css`
-      :host {
-        display: block;
-        height: 100vh;
-      }
-
-      .container {
-        display: flex;
-        height: 100%;
-        overflow: hidden;
-      }
-
-      .sidebar {
-        width: 280px;
-        background: var(--bg-surface);
-        border-right: 1px solid var(--border-color);
-        overflow-y: auto;
-        overflow-x: hidden;
-        padding: 16px 12px;
-        display: flex;
-        flex-direction: column;
-        gap: 8px;
-      }
-
-      .sidebar::-webkit-scrollbar {
-        width: 6px;
-      }
-
-      .sidebar-header {
-        display: flex;
-        align-items: center;
-        justify-content: space-between;
-        margin-bottom: 4px;
-      }
-
-      .sidebar h1 {
-        font-size: 18px;
-        font-weight: 700;
-        letter-spacing: -0.02em;
-        background: linear-gradient(135deg, var(--primary-light), var(--primary));
-        -webkit-background-clip: text;
-        -webkit-text-fill-color: transparent;
-      }
-
-      .main {
-        flex: 1;
-        overflow-y: auto;
-        overflow-x: hidden;
-        background: var(--bg-main);
-        display: flex;
-        flex-direction: column;
-      }
-
-
-      /* 移动端遮罩 */
-      .mobile-overlay {
-        display: none;
-        position: fixed;
-        top: 0;
-        left: 0;
-        width: 100%;
-        height: 100%;
-        background: rgba(0, 0, 0, 0.5);
-        z-index: 999;
-      }
-
-      @media (max-width: 768px) {
-        .mobile-overlay.show {
-          display: block;
-        }
-
-        .container {
-          flex-direction: column;
-        }
-
-        .sidebar {
-          position: fixed;
-          top: 0;
-          left: 0;
-          width: 280px;
-          height: 100vh;
-          border-right: 1px solid var(--border-color);
-          border-bottom: none;
-          transform: translateX(-100%);
-          transition: transform 0.3s ease;
-          z-index: 1000;
-        }
-
-        .sidebar.open {
-          transform: translateX(0);
-        }
-
-        .main {
-          padding-top: 0;
-        }
-      }
-    `
-  ];
-
-  render() {
-    return html`
-      <!-- 移动端遮罩 -->
-      <div class="mobile-overlay ${this.mobileMenuOpen ? 'show' : ''}" @click=${this.toggleMobileMenu}></div>
-
-      <div class="container">
-        <!-- 左侧表列表 -->
-        <div class="sidebar ${this.mobileMenuOpen ? 'open' : ''}">
-          <div class="sidebar-header">
-            <h1>SRDB Tables</h1>
-            <srdb-theme-toggle></srdb-theme-toggle>
-          </div>
-          <srdb-table-list @table-selected=${this.toggleMobileMenu}></srdb-table-list>
-        </div>
-
-        <!-- 右侧主内容区 -->
-        <div class="main">
-          <srdb-page-header @toggle-mobile-menu=${this.toggleMobileMenu}></srdb-page-header>
-          <srdb-table-view></srdb-table-view>
-        </div>
-      </div>
-    `;
-  }
-}
-
-customElements.define('srdb-app', AppContainer);
diff --git a/webui/static/js/components/badge.js b/webui/static/js/components/badge.js
deleted file mode 100644
index c34781c..0000000
--- a/webui/static/js/components/badge.js
+++ /dev/null
@@ -1,106 +0,0 @@
-import { LitElement, html, css } from 'lit';
-import { sharedStyles, cssVariables } from '~/common/shared-styles.js';
-
-export class Badge extends LitElement {
-  static properties = {
-    variant: { type: String }, // 'primary', 'success', 'warning', 'danger', 'info'
-    icon: { type: String },
-    size: { type: String } // 'sm', 'md'
-  };
-
-  static styles = [
-    sharedStyles,
-    cssVariables,
-    css`
-      :host {
-        display: inline-flex;
-      }
-
-      .badge {
-        position: relative;
-        display: inline-flex;
-        align-items: center;
-        gap: 4px;
-        padding: 2px 8px;
-        font-size: 11px;
-        font-weight: 600;
-        border-radius: var(--radius-sm);
-        white-space: nowrap;
-      }
-
-      .badge.size-md {
-        padding: 4px 10px;
-        font-size: 12px;
-      }
-
-      /* Primary variant */
-      .badge.variant-primary {
-        --badge-border-color: rgba(99, 102, 241, 0.2);
-        background: rgba(99, 102, 241, 0.15);
-        color: var(--primary);
-      }
-
-      /* Success variant */
-      .badge.variant-success {
-        --badge-border-color: rgba(16, 185, 129, 0.2);
-        background: rgba(16, 185, 129, 0.15);
-        color: var(--success);
-      }
-
-      /* Warning variant */
-      .badge.variant-warning {
-        --badge-border-color: rgba(245, 158, 11, 0.2);
-        background: rgba(245, 158, 11, 0.15);
-        color: var(--warning);
-      }
-
-      /* Danger variant */
-      .badge.variant-danger {
-        --badge-border-color: rgba(239, 68, 68, 0.2);
-        background: rgba(239, 68, 68, 0.15);
-        color: var(--danger);
-      }
-
-      /* Info variant */
-      .badge.variant-info {
-        --badge-border-color: rgba(59, 130, 246, 0.2);
-        background: rgba(59, 130, 246, 0.15);
-        color: var(--info);
-      }
-
-      /* Secondary variant */
-      .badge.variant-secondary {
-        --badge-border-color: rgba(160, 160, 176, 0.2);
-        background: rgba(160, 160, 176, 0.15);
-        color: var(--text-secondary);
-      }
-
-      .icon {
-        font-size: 12px;
-        line-height: 1;
-      }
-
-      .badge.size-md .icon {
-        font-size: 14px;
-      }
-    `
-  ];
-
-  constructor() {
-    super();
-    this.variant = 'primary';
-    this.icon = '';
-    this.size = 'sm';
-  }
-
-  render() {
-    return html`
-      <span class="badge variant-${this.variant} size-${this.size}">
-        ${this.icon ? html`<span class="icon">${this.icon}</span>` : ''}
-        <slot></slot>
-      </span>
-    `;
-  }
-}
-
-customElements.define('srdb-badge', Badge);
diff --git a/webui/static/js/components/data-view.js b/webui/static/js/components/data-view.js
deleted file mode 100644
index 74c70b8..0000000
--- a/webui/static/js/components/data-view.js
+++ /dev/null
@@ -1,549 +0,0 @@
-import { LitElement, html, css } from 'lit';
-import { sharedStyles, cssVariables } from '~/common/shared-styles.js';
-import domAlign from 'dom-align';
-
-export class DataView extends LitElement {
-  static properties = {
-    tableName: { type: String },
-    schema: { type: Object },
-    tableData: { type: Object },
-    selectedColumns: { type: Array },
-    loading: { type: Boolean }
-  };
-
-  static styles = [
-    sharedStyles,
-    cssVariables,
-    css`
-      :host {
-        display: block;
-      }
-
-      h3 {
-        font-size: 16px;
-        font-weight: 600;
-        margin: 20px 0 12px 0;
-        color: var(--text-primary);
-      }
-
-      .schema-section {
-        margin-bottom: 24px;
-      }
-
-      .schema-grid {
-        display: grid;
-        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
-        gap: 12px;
-      }
-
-      .schema-field-card {
-        padding: 12px;
-        background: var(--bg-elevated);
-        border: 1px solid var(--border-color);
-        border-radius: var(--radius-md);
-        cursor: pointer;
-        transition: var(--transition);
-      }
-
-      .schema-field-card:hover {
-        background: var(--bg-hover);
-      }
-
-      .schema-field-card.selected {
-        border-color: var(--primary);
-        background: var(--primary-bg);
-      }
-
-      .field-item {
-        display: flex;
-        flex-direction: column;
-        gap: 4px;
-      }
-
-      .field-item-row {
-        display: flex;
-        align-items: center;
-        gap: 8px;
-      }
-
-      .field-index-icon {
-        font-size: 14px;
-        flex-shrink: 0;
-      }
-
-      .field-name {
-        font-weight: 500;
-        color: var(--text-primary);
-        font-size: 13px;
-        flex: 1;
-      }
-
-      .field-type {
-        font-family: 'Courier New', monospace;
-      }
-
-      .field-comment {
-        color: var(--text-tertiary);
-        font-size: 11px;
-        margin-top: 4px;
-        font-style: italic;
-        min-height: 16px;
-      }
-
-      .field-comment:empty::before {
-        content: "No comment";
-        opacity: 0.5;
-      }
-
-      .table-wrapper {
-        overflow-x: auto;
-        background: var(--bg-elevated);
-        border-radius: var(--radius-md);
-        border: 1px solid var(--border-color);
-      }
-
-      .data-table {
-        width: 100%;
-        border-collapse: collapse;
-        font-size: 13px;
-      }
-
-      .data-table th {
-        background: var(--bg-surface);
-        color: var(--text-secondary);
-        font-weight: 600;
-        text-align: left;
-        padding: 12px;
-        border-bottom: 1px solid var(--border-color);
-        position: sticky;
-        top: 0;
-        z-index: 1;
-      }
-
-      .data-table td {
-        padding: 10px 12px;
-        border-bottom: 1px solid var(--border-color);
-        color: var(--text-primary);
-        max-width: 300px;
-        overflow: hidden;
-        text-overflow: ellipsis;
-        white-space: nowrap;
-        cursor: pointer;
-      }
-
-      .data-table tr:hover {
-        background: var(--bg-hover);
-      }
-
-      .truncated-icon {
-        margin-left: 4px;
-        font-size: 10px;
-      }
-
-      .row-detail-btn {
-        padding: 4px 12px;
-        background: var(--primary);
-        color: white;
-        border: none;
-        border-radius: var(--radius-sm);
-        cursor: pointer;
-        font-size: 12px;
-        transition: var(--transition);
-      }
-
-      .row-detail-btn:hover {
-        background: var(--primary-dark);
-      }
-    `
-  ];
-
-  constructor() {
-    super();
-    this.tableName = '';
-    this.schema = null;
-    this.tableData = null;
-    this.selectedColumns = [];
-    this.loading = false;
-    this.hidePopoverTimeout = null;
-    this.popoverElement = null;
-    this.themeObserver = null;
-  }
-
-  connectedCallback() {
-    super.connectedCallback();
-    // 创建 popover 元素并添加到 body
-    this.createPopoverElement();
-  }
-
-  disconnectedCallback() {
-    super.disconnectedCallback();
-    // 移除 popover 元素
-    this.removePopoverElement();
-  }
-
-  createPopoverElement() {
-    if (this.popoverElement) return;
-
-    this.popoverElement = document.createElement('div');
-    this.popoverElement.className = 'srdb-cell-popover';
-
-    // 从 CSS 变量中获取主题颜色
-    this.updatePopoverTheme();
-
-    // 添加滚动条样式（使用 CSS 变量）
-    if (!document.getElementById('srdb-popover-scrollbar-style')) {
-      const style = document.createElement('style');
-      style.id = 'srdb-popover-scrollbar-style';
-      style.textContent = `
-        .srdb-cell-popover::-webkit-scrollbar {
-          width: 8px;
-          height: 8px;
-        }
-        .srdb-cell-popover::-webkit-scrollbar-track {
-          background: var(--bg-surface);
-          border-radius: 4px;
-        }
-        .srdb-cell-popover::-webkit-scrollbar-thumb {
-          background: var(--border-color);
-          border-radius: 4px;
-        }
-        .srdb-cell-popover::-webkit-scrollbar-thumb:hover {
-          background: var(--border-hover);
-        }
-      `;
-      document.head.appendChild(style);
-    }
-
-    this.popoverElement.addEventListener('mouseenter', () => this.keepPopover());
-    this.popoverElement.addEventListener('mouseleave', () => this.hidePopover());
-
-    document.body.appendChild(this.popoverElement);
-
-    // 监听主题变化
-    this.themeObserver = new MutationObserver(() => {
-      this.updatePopoverTheme();
-    });
-    this.themeObserver.observe(document.documentElement, {
-      attributes: true,
-      attributeFilter: ['data-theme']
-    });
-  }
-
-  updatePopoverTheme() {
-    if (!this.popoverElement) return;
-
-    const rootStyles = getComputedStyle(document.documentElement);
-    const bgElevated = rootStyles.getPropertyValue('--bg-elevated').trim();
-    const textPrimary = rootStyles.getPropertyValue('--text-primary').trim();
-    const borderColor = rootStyles.getPropertyValue('--border-color').trim();
-    const shadowMd = rootStyles.getPropertyValue('--shadow-md').trim();
-    const radiusMd = rootStyles.getPropertyValue('--radius-md').trim();
-
-    this.popoverElement.style.cssText = `
-      position: fixed;
-      z-index: 9999;
-      background: ${bgElevated};
-      border: 1px solid ${borderColor};
-      border-radius: ${radiusMd};
-      box-shadow: ${shadowMd};
-      padding: 12px;
-      max-width: 500px;
-      max-height: 400px;
-      overflow: auto;
-      font-size: 13px;
-      color: ${textPrimary};
-      white-space: pre-wrap;
-      word-break: break-word;
-      font-family: 'Courier New', monospace;
-      opacity: 0;
-      transition: opacity 0.15s ease-in-out, background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
-      display: none;
-      pointer-events: auto;
-    `;
-  }
-
-  removePopoverElement() {
-    if (this.popoverElement) {
-      this.popoverElement.remove();
-      this.popoverElement = null;
-    }
-    if (this.themeObserver) {
-      this.themeObserver.disconnect();
-      this.themeObserver = null;
-    }
-  }
-
-  updated(changedProperties) {
-    // 当 tableName 或 schema 改变时，尝试加载保存的列选择
-    if ((changedProperties.has('tableName') || changedProperties.has('schema')) && this.tableName && this.schema) {
-      const saved = this.loadSelectedColumns();
-      if (saved && saved.length > 0) {
-        // 验证保存的列是否仍然存在于当前 schema 中
-        const validColumns = saved.filter(col => 
-          this.schema.fields.some(field => field.name === col)
-        );
-        if (validColumns.length > 0) {
-          this.selectedColumns = validColumns;
-        }
-      }
-    }
-  }
-
-  toggleColumn(columnName) {
-    const index = this.selectedColumns.indexOf(columnName);
-    if (index > -1) {
-      this.selectedColumns = this.selectedColumns.filter(c => c !== columnName);
-    } else {
-      this.selectedColumns = [...this.selectedColumns, columnName];
-    }
-    
-    // 持久化到 localStorage
-    this.saveSelectedColumns();
-    
-    this.dispatchEvent(new CustomEvent('columns-changed', {
-      detail: { columns: this.selectedColumns },
-      bubbles: true,
-      composed: true
-    }));
-  }
-
-  saveSelectedColumns() {
-    if (!this.tableName) return;
-    const key = `srdb_columns_${this.tableName}`;
-    localStorage.setItem(key, JSON.stringify(this.selectedColumns));
-  }
-
-  loadSelectedColumns() {
-    if (!this.tableName) return null;
-    const key = `srdb_columns_${this.tableName}`;
-    const saved = localStorage.getItem(key);
-    return saved ? JSON.parse(saved) : null;
-  }
-
-  showRowDetail(seq) {
-    this.dispatchEvent(new CustomEvent('show-row-detail', {
-      detail: { tableName: this.tableName, seq },
-      bubbles: true,
-      composed: true
-    }));
-  }
-
-  formatCount(count) {
-    if (count >= 1000000) return (count / 1000000).toFixed(1) + 'M';
-    if (count >= 1000) return (count / 1000).toFixed(1) + 'K';
-    return count.toString();
-  }
-
-  formatTime(nanoTime) {
-    if (!nanoTime) return '';
-    // 将纳秒转换为毫秒
-    const date = new Date(nanoTime / 1000000);
-    // 格式化为 YYYY-MM-DD HH:mm:ss
-    const year = date.getFullYear();
-    const month = String(date.getMonth() + 1).padStart(2, '0');
-    const day = String(date.getDate()).padStart(2, '0');
-    const hours = String(date.getHours()).padStart(2, '0');
-    const minutes = String(date.getMinutes()).padStart(2, '0');
-    const seconds = String(date.getSeconds()).padStart(2, '0');
-    return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
-  }
-
-  formatValue(value) {
-    // 处理 null 和 undefined
-    if (value === null) return 'null';
-    if (value === undefined) return 'undefined';
-
-    // 处理 Object 和 Array 类型
-    if (typeof value === 'object') {
-      try {
-        return JSON.stringify(value);
-      } catch (e) {
-        return '[Object]';
-      }
-    }
-
-    // 其他类型直接返回
-    return value;
-  }
-
-  showPopover(event, value, col) {
-    if (!this.popoverElement) return;
-
-    // 清除之前的隐藏定时器
-    if (this.hidePopoverTimeout) {
-      clearTimeout(this.hidePopoverTimeout);
-      this.hidePopoverTimeout = null;
-    }
-
-    // 格式化值
-    let content = col === '_time' ? this.formatTime(value) : this.formatValue(value);
-
-    // 对于 JSON 对象/数组，格式化显示
-    if (typeof value === 'object' && value !== null) {
-      try {
-        content = JSON.stringify(value, null, 2);
-      } catch (e) {
-        content = String(content);
-      }
-    } else {
-      content = String(content);
-    }
-
-    // 只在内容较长时显示 popover
-    if (content.length < 50) {
-      return;
-    }
-
-    // 更新 popover 内容
-    this.popoverElement.textContent = content;
-    this.popoverElement.style.display = 'block';
-
-    // 使用 dom-align 进行智能定位
-    // 减小间隙到 2px，方便鼠标移入
-    domAlign(this.popoverElement, event.target, {
-      points: ['tl', 'tr'],  // popover左上角 对齐到 单元格右上角
-      offset: [2, 0],        // 右侧间距仅2px，便于鼠标移入
-      overflow: { adjustX: true, adjustY: true }
-    });
-
-    // 使用 setTimeout 确保 dom-align 完成后再显示
-    setTimeout(() => {
-      if (this.popoverElement) {
-        this.popoverElement.style.opacity = '1';
-      }
-    }, 10);
-  }
-
-  hidePopover() {
-    if (!this.popoverElement) return;
-
-    // 延迟隐藏，给用户足够时间移动鼠标到 popover（300ms）
-    this.hidePopoverTimeout = setTimeout(() => {
-      if (this.popoverElement) {
-        this.popoverElement.style.opacity = '0';
-        // 等待动画完成后再隐藏
-        setTimeout(() => {
-          if (this.popoverElement) {
-            this.popoverElement.style.display = 'none';
-          }
-        }, 150);
-      }
-    }, 300);
-  }
-
-  keepPopover() {
-    // 鼠标进入 popover 时，取消隐藏
-    if (this.hidePopoverTimeout) {
-      clearTimeout(this.hidePopoverTimeout);
-      this.hidePopoverTimeout = null;
-    }
-  }
-
-  getColumns() {
-    let columns = [];
-    
-    if (this.selectedColumns.length > 0) {
-      columns = [...this.selectedColumns];
-    } else {
-      columns = this.schema?.fields?.map(f => f.name) || [];
-    }
-    
-    // 确保系统字段的顺序：_seq 在开头，_time 在倒数第二
-    const filtered = columns.filter(c => c !== '_seq' && c !== '_time');
-    
-    // _seq 放开头
-    const result = ['_seq', ...filtered];
-    
-    // _time 放倒数第二（Actions 列之前）
-    result.push('_time');
-    
-    return result;
-  }
-
-  render() {
-    if (this.loading || !this.schema || !this.tableData) {
-      return html`<div class="loading">Loading data...</div>`;
-    }
-
-    const columns = this.getColumns();
-
-    return html`
-      ${this.renderSchemaSection()}
-
-      <h3>Data (${this.formatCount(this.tableData.totalRows)} rows)</h3>
-
-      ${this.tableData.data.length === 0 ? html`
-        <div class="empty"><p>No data available</p></div>
-      ` : html`
-        <div class="table-wrapper">
-          <table class="data-table">
-            <thead>
-              <tr>
-                ${columns.map(col => html`<th>${col}</th>`)}
-                <th style="text-align: center;">Actions</th>
-              </tr>
-            </thead>
-            <tbody>
-              ${this.tableData.data.map(row => html`
-                <tr>
-                  ${columns.map(col => html`
-                    <td
-                      @mouseenter=${(e) => this.showPopover(e, row[col], col)}
-                      @mouseleave=${() => this.hidePopover()}
-                    >
-                      ${col === '_time' ? this.formatTime(row[col]) : this.formatValue(row[col])}
-                      ${row[col + '_truncated'] ? html`<span class="truncated-icon">✂️</span>` : ''}
-                    </td>
-                  `)}
-                  <td style="text-align: center;">
-                    <button
-                      class="row-detail-btn"
-                      @click=${() => this.showRowDetail(row._seq)}
-                    >
-                      Detail
-                    </button>
-                  </td>
-                </tr>
-              `)}
-            </tbody>
-          </table>
-        </div>
-      `}
-    `;
-  }
-
-  renderSchemaSection() {
-    if (!this.schema || !this.schema.fields) return '';
-
-    return html`
-      <div class="schema-section">
-        <h3>Schema <span style="font-size: 12px; font-weight: 400; color: var(--text-secondary);">(点击字段卡片选择要显示的列)</span></h3>
-        <div class="schema-grid">
-          ${this.schema.fields.map(field => html`
-            <div 
-              class="schema-field-card ${this.selectedColumns.includes(field.name) ? 'selected' : ''}"
-              @click=${() => this.toggleColumn(field.name)}
-            >
-              <div class="field-item">
-                <div class="field-item-row">
-                  <srdb-field-icon 
-                    ?indexed=${field.indexed}
-                    class="field-index-icon"
-                    title="${field.indexed ? 'Indexed field (fast)' : 'Not indexed (slow)'}"
-                  ></srdb-field-icon>
-                  <span class="field-name">${field.name}</span>
-                  <srdb-badge variant="primary" class="field-type">
-                    ${field.type}
-                  </srdb-badge>
-                </div>
-                <div class="field-comment">${field.comment || ''}</div>
-              </div>
-            </div>
-          `)}
-        </div>
-      </div>
-    `;
-  }
-}
-
-customElements.define('srdb-data-view', DataView);
diff --git a/webui/static/js/components/field-icon.js b/webui/static/js/components/field-icon.js
deleted file mode 100644
index e369663..0000000
--- a/webui/static/js/components/field-icon.js
+++ /dev/null
@@ -1,58 +0,0 @@
-import { LitElement, html, css } from 'lit';
-
-export class FieldIcon extends LitElement {
-  static properties = {
-    indexed: { type: Boolean }
-  };
-  static styles = css`
-    :host {
-      display: inline-flex;
-      align-items: center;
-      justify-content: center;
-      width: 20px;
-      height: 20px;
-    }
-
-    svg {
-      width: 16px;
-      height: 16px;
-    }
-
-    .indexed {
-      fill: var(--success);
-      color: var(--success);
-      opacity: 1;
-    }
-
-    .not-indexed {
-      fill: var(--text-secondary);
-      color: var(--text-secondary);
-      opacity: 0.6;
-    }
-  `;
-
-  constructor() {
-    super();
-    this.indexed = false;
-  }
-
-  render() {
-    if (this.indexed) {
-      // 闪电图标 - 已索引（快速）
-      return html`
-        <svg viewBox="0 0 24 24" class="indexed" xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
-          <polygon points="13 2 3 14 12 14 11 22 21 10 12 10 13 2" fill="currentColor" stroke="none"/>
-        </svg>
-      `;
-    } else {
-      // 圆点图标 - 未索引
-      return html`
-        <svg viewBox="0 0 24 24" class="not-indexed" xmlns="http://www.w3.org/2000/svg">
-          <circle cx="12" cy="12" r="4" fill="currentColor"/>
-        </svg>
-      `;
-    }
-  }
-}
-
-customElements.define('srdb-field-icon', FieldIcon);
diff --git a/webui/static/js/components/manifest-view.js b/webui/static/js/components/manifest-view.js
deleted file mode 100644
index 3953f0f..0000000
--- a/webui/static/js/components/manifest-view.js
+++ /dev/null
@@ -1,320 +0,0 @@
-import { LitElement, html, css } from 'lit';
-import { sharedStyles, cssVariables } from '~/common/shared-styles.js';
-
-export class ManifestView extends LitElement {
-  static properties = {
-    manifestData: { type: Object },
-    loading: { type: Boolean },
-    expandedLevels: { type: Set }
-  };
-
-  static styles = [
-    sharedStyles,
-    cssVariables,
-    css`
-      :host {
-        display: block;
-      }
-
-      h3 {
-        font-size: 16px;
-        font-weight: 600;
-        margin: 20px 0 12px 0;
-        color: var(--text-primary);
-      }
-
-      .manifest-stats {
-        display: grid;
-        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
-        gap: 16px;
-        margin-bottom: 24px;
-      }
-
-      .stat-card {
-        padding: 16px;
-        background: var(--bg-elevated);
-        border: 1px solid var(--border-color);
-        border-radius: var(--radius-md);
-      }
-
-      .stat-label {
-        font-size: 12px;
-        color: var(--text-tertiary);
-        margin-bottom: 8px;
-      }
-
-      .stat-value {
-        font-size: 20px;
-        font-weight: 600;
-        color: var(--text-primary);
-      }
-
-      .level-card {
-        margin-bottom: 12px;
-        background: var(--bg-elevated);
-        border: 1px solid var(--border-color);
-        border-radius: var(--radius-md);
-        overflow: hidden;
-      }
-
-      .level-header {
-        display: flex;
-        align-items: center;
-        justify-content: space-between;
-        padding: 16px;
-        cursor: pointer;
-        transition: var(--transition);
-      }
-
-      .level-header:hover {
-        background: var(--bg-hover);
-      }
-
-      .level-header-left {
-        display: flex;
-        align-items: center;
-        gap: 12px;
-        flex: 1;
-      }
-
-      .expand-icon {
-        font-size: 12px;
-        color: var(--text-secondary);
-        transition: transform 0.2s ease;
-        user-select: none;
-      }
-
-      .expand-icon.expanded {
-        transform: rotate(90deg);
-      }
-
-      .level-title {
-        font-size: 16px;
-        font-weight: 600;
-        color: var(--text-primary);
-      }
-
-      .level-stats {
-        display: flex;
-        gap: 16px;
-        font-size: 13px;
-        color: var(--text-secondary);
-      }
-
-      .level-files {
-        padding: 16px;
-        background: var(--bg-surface);
-        border-top: 1px solid var(--border-color);
-        display: none;
-      }
-
-      .level-files.expanded {
-        display: block;
-      }
-
-      .file-list {
-        display: grid;
-        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
-        gap: 12px;
-      }
-
-      .file-item {
-        padding: 12px;
-        background: var(--bg-elevated);
-        border: 1px solid var(--border-color);
-        border-radius: var(--radius-sm);
-        transition: var(--transition);
-      }
-
-      .file-item:hover {
-        border-color: var(--primary);
-        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
-      }
-
-      .file-name {
-        display: flex;
-        align-items: center;
-        justify-content: space-between;
-        margin-bottom: 8px;
-      }
-
-      .file-name-text {
-        font-family: 'Courier New', monospace;
-        font-size: 13px;
-        color: var(--text-primary);
-        font-weight: 500;
-      }
-
-      .file-level-badge {
-        font-size: 11px;
-        padding: 2px 8px;
-        background: var(--primary-bg);
-        color: var(--primary);
-        border-radius: var(--radius-sm);
-        font-weight: 600;
-        font-family: 'Courier New', monospace;
-      }
-
-      .file-detail {
-        display: flex;
-        flex-direction: column;
-        gap: 4px;
-        font-size: 12px;
-        color: var(--text-secondary);
-      }
-
-      .file-detail-row {
-        display: flex;
-        justify-content: space-between;
-      }
-
-      @media (max-width: 768px) {
-        .file-list {
-          grid-template-columns: 1fr;
-        }
-      }
-
-      .empty {
-        background: var(--bg-elevated);
-        border-radius: var(--radius-md);
-        border: 1px dashed var(--border-color);
-        margin-top: 24px;
-      }
-
-      .empty p {
-        margin: 0;
-      }
-    `
-  ];
-
-  constructor() {
-    super();
-    this.manifestData = null;
-    this.loading = false;
-    this.expandedLevels = new Set();
-  }
-
-  toggleLevel(levelNum) {
-    if (this.expandedLevels.has(levelNum)) {
-      this.expandedLevels.delete(levelNum);
-    } else {
-      this.expandedLevels.add(levelNum);
-    }
-    this.requestUpdate();
-  }
-
-  formatSize(bytes) {
-    if (bytes >= 1024 * 1024 * 1024) return (bytes / (1024 * 1024 * 1024)).toFixed(2) + ' GB';
-    if (bytes >= 1024 * 1024) return (bytes / (1024 * 1024)).toFixed(2) + ' MB';
-    if (bytes >= 1024) return (bytes / 1024).toFixed(2) + ' KB';
-    return bytes + ' B';
-  }
-
-  getScoreVariant(score) {
-    if (score >= 0.8) return 'danger';    // 高分 = 需要紧急 compaction
-    if (score >= 0.5) return 'warning';   // 中分 = 需要关注
-    return 'success';                     // 低分 = 健康状态
-  }
-
-  render() {
-    if (this.loading || !this.manifestData) {
-      return html`<div class="loading">Loading manifest...</div>`;
-    }
-
-    const totalFiles = this.manifestData.levels.reduce((sum, l) => sum + l.file_count, 0);
-    const totalSize = this.manifestData.levels.reduce((sum, l) => sum + l.total_size, 0);
-    const totalCompactions = this.manifestData.compaction_stats?.total_compactions || 0;
-
-    return html`
-      <h3>LSM-Tree Structure</h3>
-      
-      <div class="manifest-stats">
-        <div class="stat-card">
-          <div class="stat-label">Active Levels</div>
-          <div class="stat-value">${this.manifestData.levels.filter(l => l.file_count > 0).length}</div>
-        </div>
-        <div class="stat-card">
-          <div class="stat-label">Total Files</div>
-          <div class="stat-value">${totalFiles}</div>
-        </div>
-        <div class="stat-card">
-          <div class="stat-label">Total Size</div>
-          <div class="stat-value">${this.formatSize(totalSize)}</div>
-        </div>
-        <div class="stat-card">
-          <div class="stat-label">Compactions</div>
-          <div class="stat-value">${totalCompactions}</div>
-        </div>
-      </div>
-
-      ${this.manifestData.levels && this.manifestData.levels.length > 0 
-        ? this.manifestData.levels.map(level => this.renderLevelCard(level))
-        : html`
-          <div class="empty">
-            <p>No SSTable files in this table yet.</p>
-            <p style="font-size: 14px; margin-top: 8px;">Insert some data to see the LSM-Tree structure.</p>
-          </div>
-        `
-      }
-    `;
-  }
-
-  renderLevelCard(level) {
-    if (level.file_count === 0) return '';
-
-    const isExpanded = this.expandedLevels.has(level.level);
-
-    return html`
-      <div class="level-card">
-        <div class="level-header" @click=${() => this.toggleLevel(level.level)}>
-          <div class="level-header-left">
-            <span class="expand-icon ${isExpanded ? 'expanded' : ''}">▶</span>
-            <div>
-              <div class="level-title">Level ${level.level}</div>
-              <div class="level-stats">
-                <span>${level.file_count} files</span>
-                <span>${this.formatSize(level.total_size)}</span>
-                ${level.score !== undefined ? html`
-                  <srdb-badge variant="${this.getScoreVariant(level.score)}">
-                    Score: ${(level.score * 100).toFixed(0)}%
-                  </srdb-badge>
-                ` : ''}
-              </div>
-            </div>
-          </div>
-        </div>
-        
-        ${level.files && level.files.length > 0 ? html`
-          <div class="level-files ${isExpanded ? 'expanded' : ''}">
-            <div class="file-list">
-              ${level.files.map(file => html`
-                <div class="file-item">
-                  <div class="file-name">
-                    <span class="file-name-text">${file.file_number}.sst</span>
-                    <span class="file-level-badge">L${level.level}</span>
-                  </div>
-                  <div class="file-detail">
-                    <div class="file-detail-row">
-                      <span>Size:</span>
-                      <span>${this.formatSize(file.file_size)}</span>
-                    </div>
-                    <div class="file-detail-row">
-                      <span>Rows:</span>
-                      <span>${file.row_count || 0}</span>
-                    </div>
-                    <div class="file-detail-row">
-                      <span>Seq Range:</span>
-                      <span>${file.min_key} - ${file.max_key}</span>
-                    </div>
-                  </div>
-                </div>
-              `)}
-            </div>
-          </div>
-        ` : ''}
-      </div>
-    `;
-  }
-}
-
-customElements.define('srdb-manifest-view', ManifestView);
diff --git a/webui/static/js/components/modal-dialog.js b/webui/static/js/components/modal-dialog.js
deleted file mode 100644
index 6e19f65..0000000
--- a/webui/static/js/components/modal-dialog.js
+++ /dev/null
@@ -1,179 +0,0 @@
-import { LitElement, html, css } from 'lit';
-import { sharedStyles, cssVariables } from '~/common/shared-styles.js';
-
-export class ModalDialog extends LitElement {
-  static properties = {
-    open: { type: Boolean },
-    title: { type: String },
-    content: { type: String }
-  };
-
-  static styles = [
-    sharedStyles,
-    cssVariables,
-    css`
-    :host {
-      display: none;
-      position: fixed;
-      top: 0;
-      left: 0;
-      width: 100%;
-      height: 100%;
-      background: rgba(0, 0, 0, 0.7);
-      z-index: 1000;
-      align-items: center;
-      justify-content: center;
-    }
-
-    :host([open]) {
-      display: flex;
-    }
-
-    .modal-content {
-      background: var(--bg-surface);
-      border-radius: var(--radius-lg);
-      box-shadow: var(--shadow-xl);
-      min-width: 324px;
-      max-width: 90vw;
-      max-height: 80vh;
-      width: fit-content;
-      display: flex;
-      flex-direction: column;
-      border: 1px solid var(--border-color);
-    }
-
-    @media (max-width: 768px) {
-      .modal-content {
-        min-width: 300px;
-        max-width: 95vw;
-      }
-    }
-
-    .modal-header {
-      display: flex;
-      align-items: center;
-      justify-content: space-between;
-      padding: 20px 24px;
-      border-bottom: 1px solid var(--border-color);
-    }
-
-    .modal-header h3 {
-      margin: 0;
-      font-size: 18px;
-      font-weight: 600;
-      color: var(--text-primary);
-    }
-
-    .modal-close {
-      background: transparent;
-      border: none;
-      color: var(--text-secondary);
-      cursor: pointer;
-      padding: 4px;
-      display: flex;
-      align-items: center;
-      justify-content: center;
-      border-radius: var(--radius-sm);
-      transition: var(--transition);
-    }
-
-    .modal-close:hover {
-      background: var(--bg-hover);
-      color: var(--text-primary);
-    }
-
-    .modal-body {
-      padding: 24px;
-      overflow-y: auto;
-      flex: 1;
-    }
-
-    pre {
-      /*background: var(--bg-elevated);*/
-      padding: 16px;
-      border-radius: var(--radius-md);
-      overflow-x: auto;
-      color: var(--text-primary);
-      font-family: 'Courier New', monospace;
-      font-size: 13px;
-      line-height: 1.5;
-      margin: 0;
-      white-space: pre-wrap;
-      word-wrap: break-word;
-    }
-  `
-  ];
-
-  constructor() {
-    super();
-    this.open = false;
-    this.title = 'Content';
-    this.content = '';
-    this._handleKeyDown = this._handleKeyDown.bind(this);
-  }
-
-  connectedCallback() {
-    super.connectedCallback();
-    document.addEventListener('keydown', this._handleKeyDown);
-  }
-
-  disconnectedCallback() {
-    super.disconnectedCallback();
-    document.removeEventListener('keydown', this._handleKeyDown);
-  }
-
-  updated(changedProperties) {
-    if (changedProperties.has('open')) {
-      if (this.open) {
-        this.setAttribute('open', '');
-      } else {
-        this.removeAttribute('open');
-      }
-    }
-  }
-
-  _handleKeyDown(e) {
-    if (this.open && e.key === 'Escape') {
-      this.close();
-    }
-  }
-
-  close() {
-    this.open = false;
-    this.dispatchEvent(new CustomEvent('modal-close', {
-      bubbles: true,
-      composed: true
-    }));
-  }
-
-  render() {
-    return html`
-      <div class="modal-content" @click=${(e) => e.stopPropagation()}>
-        <div class="modal-header">
-          <h3>${this.title}</h3>
-          <button class="modal-close" @click=${this.close}>
-            <svg
-              xmlns="http://www.w3.org/2000/svg"
-              width="20"
-              height="20"
-              viewBox="0 0 24 24"
-              fill="none"
-              stroke="currentColor"
-              stroke-width="2"
-              stroke-linecap="round"
-              stroke-linejoin="round"
-            >
-              <line x1="18" y1="6" x2="6" y2="18"></line>
-              <line x1="6" y1="6" x2="18" y2="18"></line>
-            </svg>
-          </button>
-        </div>
-        <div class="modal-body">
-          <pre>${this.content}</pre>
-        </div>
-      </div>
-    `;
-  }
-}
-
-customElements.define('srdb-modal-dialog', ModalDialog);
diff --git a/webui/static/js/components/page-header.js b/webui/static/js/components/page-header.js
deleted file mode 100644
index 0364812..0000000
--- a/webui/static/js/components/page-header.js
+++ /dev/null
@@ -1,267 +0,0 @@
-import { LitElement, html, css } from 'lit';
-import { sharedStyles, cssVariables } from '~/common/shared-styles.js';
-
-export class PageHeader extends LitElement {
-  static properties = {
-    tableName: { type: String },
-    view: { type: String }
-  };
-
-  static styles = [
-    sharedStyles,
-    cssVariables,
-    css`
-      :host {
-        display: block;
-        background: var(--bg-surface);
-        border-bottom: 1px solid var(--border-color);
-        position: sticky;
-        top: 0;
-        z-index: 10;
-      }
-
-      .header-content {
-        padding: 16px 24px;
-      }
-
-      .header-top {
-        display: flex;
-        align-items: center;
-        gap: 16px;
-        margin-bottom: 12px;
-      }
-
-      .mobile-menu-btn {
-        display: none;
-        width: 40px;
-        height: 40px;
-        background: var(--primary);
-        border: none;
-        border-radius: var(--radius-md);
-        color: white;
-        cursor: pointer;
-        flex-shrink: 0;
-        transition: var(--transition);
-      }
-
-      .mobile-menu-btn:hover {
-        background: var(--primary-dark);
-      }
-
-      .mobile-menu-btn svg {
-        width: 20px;
-        height: 20px;
-      }
-
-      h2 {
-        font-size: 24px;
-        font-weight: 600;
-        margin: 0;
-        color: var(--text-primary);
-      }
-
-      .empty-state {
-        text-align: center;
-        padding: 20px;
-        color: var(--text-secondary);
-      }
-
-      .view-tabs {
-        display: flex;
-        align-items: center;
-        gap: 8px;
-        border-bottom: 1px solid var(--border-color);
-        margin: 0 -12px;
-        padding: 0 24px;
-      }
-
-      .refresh-btn {
-        margin-left: auto;
-        padding: 8px 12px;
-        background: transparent;
-        border: 1px solid var(--border-color);
-        border-radius: var(--radius-sm);
-        color: var(--text-secondary);
-        cursor: pointer;
-        transition: var(--transition);
-        display: flex;
-        align-items: center;
-        gap: 6px;
-        font-size: 13px;
-      }
-
-      .refresh-btn:hover {
-        background: var(--bg-hover);
-        border-color: var(--border-hover);
-        color: var(--text-primary);
-      }
-
-      .refresh-btn svg {
-        width: 16px;
-        height: 16px;
-      }
-
-      .view-tab {
-        position: relative;
-        padding: 16px 20px;
-        background: transparent;
-        border: none;
-        color: var(--text-secondary);
-        cursor: pointer;
-        font-size: 14px;
-        font-weight: 500;
-        transition: var(--transition);
-      }
-
-      .view-tab:hover {
-        color: var(--text-primary);
-        /*background: var(--bg-hover);*/
-      }
-
-      .view-tab.active {
-        color: var(--primary);
-      }
-
-      .view-tab::before,
-      .view-tab::after {
-        position: absolute;
-        display: block;
-        content: "";
-        z-index: 0;
-        opacity: 0;
-        inset-inline: 8px;
-      }
-
-      .view-tab::before {
-        inset-block: 8px;
-        border-radius: var(--radius-md);
-        background: var(--bg-elevated);
-      }
-
-      .view-tab::after {
-        border-radius: var(--radius-md);
-        background: var(--primary);
-        bottom: -2px;
-        height: 4px;
-      }
-
-      .view-tab.active::before,
-      .view-tab.active::after,
-      .view-tab:hover::before {
-        opacity: 1;
-      }
-
-      .view-tab span {
-        position: relative;
-        z-index: 1;
-      }
-
-      @media (max-width: 768px) {
-        .mobile-menu-btn {
-          display: flex;
-          align-items: center;
-          justify-content: center;
-        }
-
-        .header-content {
-          padding: 12px 16px;
-        }
-
-        h2 {
-          font-size: 18px;
-          flex: 1;
-        }
-
-        .view-tabs {
-          margin: 0 -16px;
-          padding: 0 16px;
-        }
-
-        .view-tab {
-          padding: 8px 16px;
-          font-size: 13px;
-        }
-      }
-    `
-  ];
-
-  constructor() {
-    super();
-    this.tableName = '';
-    this.view = 'data';
-  }
-
-  switchView(newView) {
-    this.view = newView;
-    this.dispatchEvent(new CustomEvent('view-changed', {
-      detail: { view: newView },
-      bubbles: true,
-      composed: true
-    }));
-  }
-
-  toggleMobileMenu() {
-    this.dispatchEvent(new CustomEvent('toggle-mobile-menu', {
-      bubbles: true,
-      composed: true
-    }));
-  }
-
-  refreshView() {
-    this.dispatchEvent(new CustomEvent('refresh-view', {
-      detail: { view: this.view },
-      bubbles: true,
-      composed: true
-    }));
-  }
-
-  render() {
-    if (!this.tableName) {
-      return html`
-        <div class="header-content">
-          <div class="empty-state">
-            <p>Select a table from the sidebar</p>
-          </div>
-        </div>
-      `;
-    }
-
-    return html`
-      <div class="header-content">
-        <div class="header-top">
-          <button class="mobile-menu-btn" @click=${this.toggleMobileMenu}>
-            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
-              <line x1="3" y1="12" x2="21" y2="12"></line>
-              <line x1="3" y1="6" x2="21" y2="6"></line>
-              <line x1="3" y1="18" x2="21" y2="18"></line>
-            </svg>
-          </button>
-          <h2>${this.tableName}</h2>
-        </div>
-      </div>
-      
-      <div class="view-tabs">
-        <button 
-          class="view-tab ${this.view === 'data' ? 'active' : ''}"
-          @click=${() => this.switchView('data')}
-        >
-          <span>Data</span>
-        </button>
-        <button
-          class="view-tab ${this.view === 'manifest' ? 'active' : ''}"
-          @click=${() => this.switchView('manifest')}
-        >
-          <span>Manifest / Storage Layers</span>
-        </button>
-        <button class="refresh-btn" @click=${this.refreshView} title="Refresh current view">
-          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
-            <path d="M21.5 2v6h-6M2.5 22v-6h6M2 11.5a10 10 0 0 1 18.8-4.3M22 12.5a10 10 0 0 1-18.8 4.2"/>
-          </svg>
-          <span>Refresh</span>
-        </button>
-      </div>
-    `;
-  }
-}
-
-customElements.define('srdb-page-header', PageHeader);
diff --git a/webui/static/js/components/table-list.js b/webui/static/js/components/table-list.js
deleted file mode 100644
index a252f87..0000000
--- a/webui/static/js/components/table-list.js
+++ /dev/null
@@ -1,283 +0,0 @@
-import { LitElement, html, css } from 'lit';
-import { sharedStyles, cssVariables } from '~/common/shared-styles.js';
-import { tableAPI } from '~/common/api.js';
-
-export class TableList extends LitElement {
-  static properties = {
-    tables: { type: Array },
-    selectedTable: { type: String },
-    expandedTables: { type: Set }
-  };
-
-  static styles = [
-    sharedStyles,
-    cssVariables,
-    css`
-    :host {
-      display: block;
-      width: 100%;
-    }
-
-    .table-item {
-      margin-bottom: 8px;
-      background: var(--bg-elevated);
-      border: 1px solid var(--border-color);
-      border-radius: var(--radius-md);
-      overflow: hidden;
-      transition: var(--transition);
-    }
-
-    .table-item:hover {
-      border-color: var(--border-hover);
-    }
-
-    .table-item.selected {
-      border-color: var(--primary);
-      box-shadow: 0 0 0 1px var(--primary);
-    }
-
-    .table-item.selected .table-header {
-      background: var(--primary-bg);
-    }
-
-    .table-header {
-      display: flex;
-      align-items: center;
-      justify-content: space-between;
-      padding: 10px 12px;
-      cursor: pointer;
-      transition: var(--transition);
-    }
-
-    .table-header:hover {
-      background: var(--bg-hover);
-    }
-
-    .table-item.has-expanded .table-header {
-      border-bottom-color: var(--border-color);
-    }
-
-    .table-header-left {
-      display: flex;
-      align-items: center;
-      gap: 8px;
-      flex: 1;
-      min-width: 0;
-    }
-
-    .expand-icon {
-      display: flex;
-      align-items: center;
-      justify-content: center;
-      width: 24px;
-      height: 24px;
-      font-size: 12px;
-      transition: var(--transition);
-      flex-shrink: 0;
-      border-radius: var(--radius-sm);
-      cursor: pointer;
-      color: var(--text-secondary);
-    }
-
-    .expand-icon:hover {
-      background: var(--bg-hover);
-      color: var(--text-primary);
-    }
-
-    .expand-icon.expanded {
-      transform: rotate(90deg);
-      color: var(--primary);
-    }
-
-    .table-name {
-      font-weight: 500;
-      color: var(--text-primary);
-      white-space: nowrap;
-      overflow: hidden;
-      text-overflow: ellipsis;
-    }
-    .table-count {
-      font-size: 12px;
-      color: var(--text-tertiary);
-      white-space: nowrap;
-      flex-shrink: 0;
-    }
-
-    /* Schema 字段列表 */
-    .schema-fields {
-      display: none;
-      flex-direction: column;
-      border-top: 1px solid transparent;
-      transition: var(--transition);
-      position: relative;
-    }
-
-    .schema-fields.expanded {
-      display: block;
-      border-top-color: var(--border-color);
-    }
-
-    /* 共享的垂直线 */
-    .schema-fields.expanded::before {
-      z-index: 2;
-      content: "";
-      position: absolute;
-      left: 24px;
-      top: 0;
-      bottom: 24px;
-      width: 1px;
-      background: var(--border-color);
-    }
-
-    .field-item {
-      z-index: 1;
-      display: flex;
-      align-items: center;
-      gap: 8px;
-      padding: 8px 12px 8px 24px;
-      font-size: 12px;
-      transition: var(--transition);
-      position: relative;
-    }
-
-    /* 每个字段的水平线 */
-    .field-item::before {
-      content: "";
-      width: 8px;
-      height: 1px;
-      background: var(--border-color);
-    }
-
-    .field-item:hover {
-      background: var(--bg-hover);
-    }
-
-    .field-item:last-child {
-      padding-bottom: 12px;
-    }
-
-    .field-index-icon {
-      display: flex;
-      align-items: center;
-      justify-content: center;
-      width: 20px;
-      height: 20px;
-      font-size: 14px;
-      flex-shrink: 0;
-    }
-
-    .field-index-icon.indexed {
-      color: var(--success);
-    }
-
-    .field-index-icon.not-indexed {
-      color: var(--text-tertiary);
-      opacity: 0.5;
-    }
-
-    .field-name {
-      font-weight: 500;
-      color: var(--text-secondary);
-      flex: 1;
-    }
-    .field-type {
-      font-family: 'Courier New', monospace;
-    }
-
-    .loading {
-      padding: 20px;
-    }
-
-    .error {
-      text-align: center;
-      padding: 20px;
-      color: var(--danger);
-    }
-  `
-  ];
-
-  constructor() {
-    super();
-    this.tables = [];
-    this.selectedTable = '';
-    this.expandedTables = new Set();
-  }
-
-  connectedCallback() {
-    super.connectedCallback();
-    this.loadTables();
-  }
-
-  async loadTables() {
-    try {
-      this.tables = await tableAPI.list();
-    } catch (error) {
-      console.error('Error loading tables:', error);
-    }
-  }
-
-  toggleExpand(tableName, event) {
-    event.stopPropagation();
-    if (this.expandedTables.has(tableName)) {
-      this.expandedTables.delete(tableName);
-    } else {
-      this.expandedTables.add(tableName);
-    }
-    this.requestUpdate();
-  }
-
-  selectTable(tableName) {
-    this.selectedTable = tableName;
-    this.dispatchEvent(new CustomEvent('table-selected', {
-      detail: { tableName },
-      bubbles: true,
-      composed: true
-    }));
-  }
-
-  render() {
-    if (this.tables.length === 0) {
-      return html`<div class="loading">Loading tables...</div>`;
-    }
-
-    return html`
-      ${this.tables.map(table => html`
-        <div class="table-item ${this.expandedTables.has(table.name) ? 'has-expanded' : ''} ${this.selectedTable === table.name ? 'selected' : ''}">
-          <div 
-            class="table-header"
-            @click=${() => this.selectTable(table.name)}
-          >
-            <div class="table-header-left">
-              <span 
-                class="expand-icon ${this.expandedTables.has(table.name) ? 'expanded' : ''}"
-                @click=${(e) => this.toggleExpand(table.name, e)}
-              >
-                ▶
-              </span>
-              <span class="table-name">${table.name}</span>
-            </div>
-            <span class="table-count">${table.fields.length} fields</span>
-          </div>
-          
-          <div class="schema-fields ${this.expandedTables.has(table.name) ? 'expanded' : ''}">
-            ${table.fields.map(field => html`
-              <div class="field-item">
-                <srdb-field-icon 
-                  ?indexed=${field.indexed}
-                  class="field-index-icon"
-                  title="${field.indexed ? 'Indexed field (fast)' : 'Not indexed (slow)'}"
-                ></srdb-field-icon>
-                <span class="field-name">${field.name}</span>
-                <srdb-badge variant="primary" class="field-type">
-                  ${field.type}
-                </srdb-badge>
-              </div>
-            `)}
-          </div>
-        </div>
-      `)}
-    `;
-  }
-}
-
-customElements.define('srdb-table-list', TableList);
diff --git a/webui/static/js/components/table-view.js b/webui/static/js/components/table-view.js
deleted file mode 100644
index 64f1df4..0000000
--- a/webui/static/js/components/table-view.js
+++ /dev/null
@@ -1,376 +0,0 @@
-import { LitElement, html, css } from 'lit';
-import { sharedStyles, cssVariables } from '~/common/shared-styles.js';
-import { tableAPI } from '~/common/api.js';
-
-export class TableView extends LitElement {
-  static properties = {
-    tableName: { type: String },
-    view: { type: String }, // 'data' or 'manifest'
-    schema: { type: Object },
-    tableData: { type: Object },
-    manifestData: { type: Object },
-    selectedColumns: { type: Array },
-    page: { type: Number },
-    pageSize: { type: Number },
-    loading: { type: Boolean }
-  };
-
-  static styles = [
-    sharedStyles,
-    cssVariables,
-    css`
-      :host {
-      display: flex;
-      flex-direction: column;
-      width: 100%;
-      flex: 1;
-      position: relative;
-      overflow: hidden;
-    }
-
-    .content-wrapper {
-      flex: 1;
-      overflow-y: auto;
-      padding: 24px;
-      padding-bottom: 80px;
-    }
-
-    .pagination {
-      position: fixed;
-      bottom: 0;
-      left: 280px;
-      right: 0;
-      display: flex;
-      align-items: center;
-      justify-content: center;
-      gap: 12px;
-      padding: 16px 24px;
-      background: var(--bg-elevated);
-      border-top: 1px solid var(--border-color);
-      z-index: 10;
-    }
-
-    @media (max-width: 768px) {
-      .pagination {
-        left: 0;
-      }
-    }
-
-    .pagination button {
-      padding: 8px 16px;
-      background: var(--bg-surface);
-      color: var(--text-primary);
-      border: 1px solid var(--border-color);
-      border-radius: var(--radius-sm);
-      cursor: pointer;
-      transition: var(--transition);
-    }
-
-    .pagination button:hover:not(:disabled) {
-      background: var(--bg-hover);
-      border-color: var(--border-hover);
-    }
-
-    .pagination button:disabled {
-      opacity: 0.5;
-      cursor: not-allowed;
-    }
-
-    .pagination select,
-    .pagination input {
-      padding: 8px 12px;
-      background: var(--bg-surface);
-      color: var(--text-primary);
-      border: 1px solid var(--border-color);
-      border-radius: var(--radius-sm);
-    }
-
-    .pagination input {
-      width: 80px;
-    }
-
-    .pagination span {
-      color: var(--text-primary);
-      font-size: 14px;
-    }
-  `
-  ];
-
-  constructor() {
-    super();
-    this.tableName = '';
-    this.view = 'data';
-    this.schema = null;
-    this.tableData = null;
-    this.manifestData = null;
-    this.selectedColumns = [];
-    this.page = 1;
-    this.pageSize = 20;
-    this.loading = false;
-  }
-
-  updated(changedProperties) {
-    if (changedProperties.has('tableName') && this.tableName) {
-      // 切换表时重置选中的列
-      this.selectedColumns = [];
-      this.page = 1;
-      this.loadData();
-    }
-    if (changedProperties.has('view') && this.tableName) {
-      this.loadData();
-    }
-  }
-
-  async loadData() {
-    if (!this.tableName) return;
-
-    this.loading = true;
-    
-    try {
-      // Load schema
-      this.schema = await tableAPI.getSchema(this.tableName);
-      
-      // Initialize selected columns from localStorage or all by default
-      if (this.schema.fields) {
-        const saved = this.loadSelectedColumns();
-        if (saved && saved.length > 0) {
-          // 验证保存的列是否仍然存在于当前 schema 中
-          const validColumns = saved.filter(col => 
-            this.schema.fields.some(field => field.name === col)
-          );
-          this.selectedColumns = validColumns.length > 0 ? validColumns : this.schema.fields.map(f => f.name);
-        } else {
-          this.selectedColumns = this.schema.fields.map(f => f.name);
-        }
-      }
-
-      if (this.view === 'data') {
-        await this.loadTableData();
-      } else if (this.view === 'manifest') {
-        await this.loadManifestData();
-      }
-    } catch (error) {
-      console.error('Error loading data:', error);
-    } finally {
-      this.loading = false;
-    }
-  }
-
-  async loadTableData() {
-    this.tableData = await tableAPI.getData(this.tableName, {
-      page: this.page,
-      pageSize: this.pageSize,
-      select: this.selectedColumns.join(',')
-    });
-  }
-
-  async loadManifestData() {
-    this.manifestData = await tableAPI.getManifest(this.tableName);
-  }
-
-  switchView(newView) {
-    this.view = newView;
-  }
-
-  loadSelectedColumns() {
-    if (!this.tableName) return null;
-    const key = `srdb_columns_${this.tableName}`;
-    const saved = localStorage.getItem(key);
-    return saved ? JSON.parse(saved) : null;
-  }
-
-  toggleColumn(columnName) {
-    const index = this.selectedColumns.indexOf(columnName);
-    if (index > -1) {
-      this.selectedColumns = this.selectedColumns.filter(c => c !== columnName);
-    } else {
-      this.selectedColumns = [...this.selectedColumns, columnName];
-    }
-    this.loadTableData();
-  }
-
-  changePage(delta) {
-    this.page = Math.max(1, this.page + delta);
-    this.loadTableData();
-  }
-
-  changePageSize(newSize) {
-    this.pageSize = parseInt(newSize);
-    this.page = 1;
-    this.loadTableData();
-  }
-
-  jumpToPage(pageNum) {
-    const num = parseInt(pageNum);
-    if (num > 0 && this.tableData && num <= this.tableData.totalPages) {
-      this.page = num;
-      this.loadTableData();
-    }
-  }
-
-  showRowDetail(seq) {
-    this.dispatchEvent(new CustomEvent('show-row-detail', {
-      detail: { tableName: this.tableName, seq },
-      bubbles: true,
-      composed: true
-    }));
-  }
-
-  toggleLevel(level) {
-    const levelCard = this.shadowRoot.querySelector(`[data-level="${level}"]`);
-    if (levelCard) {
-      const fileList = levelCard.querySelector('.file-list');
-      const icon = levelCard.querySelector('.expand-icon');
-      if (fileList.classList.contains('expanded')) {
-        fileList.classList.remove('expanded');
-        icon.style.transform = 'rotate(0deg)';
-      } else {
-        fileList.classList.add('expanded');
-        icon.style.transform = 'rotate(90deg)';
-      }
-    }
-  }
-
-  formatBytes(bytes) {
-    if (bytes === 0) return '0 B';
-    const k = 1024;
-    const sizes = ['B', 'KB', 'MB', 'GB', 'TB'];
-    const i = Math.floor(Math.log(bytes) / Math.log(k));
-    return (bytes / Math.pow(k, i)).toFixed(2) + ' ' + sizes[i];
-  }
-
-  formatCount(count) {
-    if (count >= 1000000) return (count / 1000000).toFixed(1) + 'M';
-    if (count >= 1000) return (count / 1000).toFixed(1) + 'K';
-    return count.toString();
-  }
-
-  render() {
-    if (!this.tableName) {
-      return html`
-        <div class="empty">
-          <h2>Select a table to view data</h2>
-          <p>Choose a table from the sidebar to get started</p>
-        </div>
-      `;
-    }
-
-    if (this.loading) {
-      return html`<div class="loading">Loading...</div>`;
-    }
-
-    return html`
-      <div class="content-wrapper">
-        ${this.view === 'data' ? html`
-          <srdb-data-view
-            .tableName=${this.tableName}
-            .schema=${this.schema}
-            .tableData=${this.tableData}
-            .selectedColumns=${this.selectedColumns}
-            .loading=${this.loading}
-            @columns-changed=${(e) => {
-              this.selectedColumns = e.detail.columns;
-              this.loadTableData();
-            }}
-            @show-row-detail=${(e) => this.showRowDetail(e.detail.seq)}
-          ></srdb-data-view>
-        ` : html`
-          <srdb-manifest-view
-            .manifestData=${this.manifestData}
-            .loading=${this.loading}
-          ></srdb-manifest-view>
-        `}
-      </div>
-      
-      ${this.view === 'data' && this.tableData ? this.renderPagination() : ''}
-    `;
-  }
-
-  renderPagination() {
-    return html`
-      <div class="pagination">
-        <select @change=${(e) => this.changePageSize(e.target.value)}>
-          ${[10, 20, 50, 100].map(size => html`
-            <option value="${size}" ?selected=${size === this.pageSize}>
-              ${size} / page
-            </option>
-          `)}
-        </select>
-        
-        <button 
-          @click=${() => this.changePage(-1)}
-          ?disabled=${this.page <= 1}
-        >
-          Previous
-        </button>
-        
-        <span>
-          Page ${this.page} of ${this.tableData.totalPages} 
-          (${this.formatCount(this.tableData.totalRows)} rows)
-        </span>
-        
-        <input 
-          type="number" 
-          min="1" 
-          max="${this.tableData.totalPages}"
-          placeholder="Jump to"
-          @keydown=${(e) => e.key === 'Enter' && this.jumpToPage(e.target.value)}
-        />
-        
-        <button @click=${(e) => this.jumpToPage(e.target.previousElementSibling.value)}>
-          Go
-        </button>
-        
-        <button 
-          @click=${() => this.changePage(1)}
-          ?disabled=${this.page >= this.tableData.totalPages}
-        >
-          Next
-        </button>
-      </div>
-    `;
-  }
-
-  formatCount(count) {
-    if (count >= 1000000) return (count / 1000000).toFixed(1) + 'M';
-    if (count >= 1000) return (count / 1000).toFixed(1) + 'K';
-    return count.toString();
-  }
-
-  changePage(delta) {
-    this.page = Math.max(1, this.page + delta);
-    this.loadTableData();
-  }
-
-  changePageSize(newSize) {
-    this.pageSize = parseInt(newSize);
-    this.page = 1;
-    this.loadTableData();
-  }
-
-  jumpToPage(pageNum) {
-    const num = parseInt(pageNum);
-    if (num > 0 && this.tableData && num <= this.tableData.totalPages) {
-      this.page = num;
-      this.loadTableData();
-    }
-  }
-
-  showRowDetail(seq) {
-    this.dispatchEvent(new CustomEvent('show-row-detail', {
-      detail: { tableName: this.tableName, seq },
-      bubbles: true,
-      composed: true
-    }));
-  }
-
-  showCellContent(content) {
-    this.dispatchEvent(new CustomEvent('show-cell-content', {
-      detail: { content },
-      bubbles: true,
-      composed: true
-    }));
-  }
-}
-
-customElements.define('srdb-table-view', TableView);
diff --git a/webui/static/js/components/theme-toggle.js b/webui/static/js/components/theme-toggle.js
deleted file mode 100644
index 932ae7e..0000000
--- a/webui/static/js/components/theme-toggle.js
+++ /dev/null
@@ -1,123 +0,0 @@
-import { LitElement, html, css } from 'lit';
-import { sharedStyles } from '~/common/shared-styles.js';
-
-export class ThemeToggle extends LitElement {
-  static properties = {
-    theme: { type: String }
-  };
-
-  static styles = [
-    sharedStyles,
-    css`
-      :host {
-        display: inline-block;
-      }
-
-      .theme-toggle {
-        display: flex;
-        align-items: center;
-        gap: 8px;
-        padding: 8px 12px;
-        background: var(--bg-elevated);
-        border: 1px solid var(--border-color);
-        border-radius: var(--radius-md);
-        cursor: pointer;
-        transition: var(--transition);
-        font-size: 14px;
-        color: var(--text-primary);
-      }
-
-      .theme-toggle:hover {
-        background: var(--bg-hover);
-        border-color: var(--border-hover);
-      }
-
-      .icon {
-        font-size: 18px;
-        display: flex;
-        align-items: center;
-      }
-
-      .label {
-        font-weight: 500;
-      }
-    `
-  ];
-
-  constructor() {
-    super();
-    // 从 localStorage 读取主题，默认为 dark
-    this.theme = localStorage.getItem('srdb-theme') || 'dark';
-    this.applyTheme();
-  }
-
-  toggleTheme() {
-    this.theme = this.theme === 'dark' ? 'light' : 'dark';
-    localStorage.setItem('srdb-theme', this.theme);
-    this.applyTheme();
-    
-    // 触发主题变化事件
-    this.dispatchEvent(new CustomEvent('theme-changed', {
-      detail: { theme: this.theme },
-      bubbles: true,
-      composed: true
-    }));
-  }
-
-  applyTheme() {
-    const root = document.documentElement;
-    
-    if (this.theme === 'light') {
-      // 浅色主题
-      root.style.setProperty('--srdb-bg-main', '#ffffff');
-      root.style.setProperty('--srdb-bg-surface', '#f5f5f5');
-      root.style.setProperty('--srdb-bg-elevated', '#e5e5e5');
-      root.style.setProperty('--srdb-bg-hover', '#d4d4d4');
-      
-      root.style.setProperty('--srdb-text-primary', '#1a1a1a');
-      root.style.setProperty('--srdb-text-secondary', '#666666');
-      root.style.setProperty('--srdb-text-tertiary', '#999999');
-      
-      root.style.setProperty('--srdb-border-color', 'rgba(0, 0, 0, 0.1)');
-      root.style.setProperty('--srdb-border-hover', 'rgba(0, 0, 0, 0.2)');
-      
-      root.style.setProperty('--srdb-shadow-sm', '0 1px 2px 0 rgba(0, 0, 0, 0.05)');
-      root.style.setProperty('--srdb-shadow-md', '0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06)');
-      root.style.setProperty('--srdb-shadow-lg', '0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05)');
-      root.style.setProperty('--srdb-shadow-xl', '0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04)');
-    } else {
-      // 深色主题（默认值）
-      root.style.setProperty('--srdb-bg-main', '#0f0f1a');
-      root.style.setProperty('--srdb-bg-surface', '#1a1a2e');
-      root.style.setProperty('--srdb-bg-elevated', '#222236');
-      root.style.setProperty('--srdb-bg-hover', '#2a2a3e');
-      
-      root.style.setProperty('--srdb-text-primary', '#ffffff');
-      root.style.setProperty('--srdb-text-secondary', '#a0a0b0');
-      root.style.setProperty('--srdb-text-tertiary', '#6b6b7b');
-      
-      root.style.setProperty('--srdb-border-color', 'rgba(255, 255, 255, 0.1)');
-      root.style.setProperty('--srdb-border-hover', 'rgba(255, 255, 255, 0.2)');
-      
-      root.style.setProperty('--srdb-shadow-sm', '0 1px 2px 0 rgba(0, 0, 0, 0.3)');
-      root.style.setProperty('--srdb-shadow-md', '0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3)');
-      root.style.setProperty('--srdb-shadow-lg', '0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3)');
-      root.style.setProperty('--srdb-shadow-xl', '0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3)');
-    }
-  }
-
-  render() {
-    return html`
-      <button class="theme-toggle" @click=${this.toggleTheme}>
-        <span class="icon">
-          ${this.theme === 'dark' ? '🌙' : '☀️'}
-        </span>
-        <span class="label">
-          ${this.theme === 'dark' ? 'Dark' : 'Light'}
-        </span>
-      </button>
-    `;
-  }
-}
-
-customElements.define('srdb-theme-toggle', ThemeToggle);
diff --git a/webui/static/js/hooks/useCellPopover.js b/webui/static/js/hooks/useCellPopover.js
new file mode 100644
index 0000000..5464767
--- /dev/null
+++ b/webui/static/js/hooks/useCellPopover.js
@@ -0,0 +1,155 @@
+import { useEffect, useRef } from 'preact/hooks';
+import domAlign from 'dom-align';
+
+export function useCellPopover() {
+    const popoverRef = useRef(null);
+    const hideTimeoutRef = useRef(null);
+    const targetCellRef = useRef(null);
+
+    useEffect(() => {
+        // 创建 popover 元素
+        const popover = document.createElement('div');
+        popover.className = 'srdb-popover';
+        updatePopoverStyles(popover);
+        document.body.appendChild(popover);
+        popoverRef.current = popover;
+
+        // 添加样式
+        addPopoverStyles();
+
+        // 监听主题变化
+        const observer = new MutationObserver(() => {
+            updatePopoverStyles(popover);
+        });
+        observer.observe(document.documentElement, {
+            attributes: true,
+            attributeFilter: ['data-theme']
+        });
+
+        // 清理
+        return () => {
+            if (popover) {
+                popover.remove();
+            }
+            observer.disconnect();
+        };
+    }, []);
+
+    const updatePopoverStyles = (popover) => {
+        const rootStyles = getComputedStyle(document.documentElement);
+        const bgElevated = rootStyles.getPropertyValue('--bg-elevated').trim();
+        const textPrimary = rootStyles.getPropertyValue('--text-primary').trim();
+        const borderColor = rootStyles.getPropertyValue('--border-color').trim();
+        const shadowMd = rootStyles.getPropertyValue('--shadow-md').trim();
+
+        popover.style.cssText = `
+            position: fixed;
+            z-index: 9999;
+            background: ${bgElevated};
+            border: 1px solid ${borderColor};
+            border-radius: 8px;
+            box-shadow: ${shadowMd};
+            padding: 12px;
+            max-width: 500px;
+            max-height: 400px;
+            overflow: auto;
+            font-size: 13px;
+            color: ${textPrimary};
+            white-space: pre-wrap;
+            word-break: break-word;
+            font-family: 'Courier New', monospace;
+            opacity: 0;
+            transition: opacity 0.15s ease-in-out, background 0.3s ease, color 0.3s ease;
+            display: none;
+            pointer-events: auto;
+        `;
+    };
+
+    const addPopoverStyles = () => {
+        if (document.getElementById('srdb-popover-styles')) return;
+
+        const style = document.createElement('style');
+        style.id = 'srdb-popover-styles';
+        style.textContent = `
+            .srdb-popover::-webkit-scrollbar {
+                width: 8px;
+                height: 8px;
+            }
+            .srdb-popover::-webkit-scrollbar-track {
+                background: var(--bg-surface);
+                border-radius: 4px;
+            }
+            .srdb-popover::-webkit-scrollbar-thumb {
+                background: var(--border-color);
+                border-radius: 4px;
+            }
+            .srdb-popover::-webkit-scrollbar-thumb:hover {
+                background: var(--border-hover);
+            }
+        `;
+        document.head.appendChild(style);
+    };
+
+    const showPopover = (e, content) => {
+        if (!popoverRef.current) return;
+
+        // 清除隐藏定时器
+        if (hideTimeoutRef.current) {
+            clearTimeout(hideTimeoutRef.current);
+            hideTimeoutRef.current = null;
+        }
+
+        // 只在内容较长时显示
+        if (content.length < 50) {
+            return;
+        }
+
+        // 更新 popover
+        popoverRef.current.textContent = content;
+        popoverRef.current.style.display = 'block';
+        targetCellRef.current = e.target;
+
+        // 使用 dom-align 定位
+        domAlign(popoverRef.current, e.target, {
+            points: ['tl', 'tr'],
+            offset: [2, 0],
+            overflow: { adjustX: true, adjustY: true }
+        });
+
+        // 显示动画
+        setTimeout(() => {
+            if (popoverRef.current) {
+                popoverRef.current.style.opacity = '1';
+            }
+        }, 10);
+
+        // 添加鼠标事件监听
+        popoverRef.current.addEventListener('mouseenter', keepPopover);
+        popoverRef.current.addEventListener('mouseleave', hidePopover);
+    };
+
+    const hidePopover = () => {
+        hideTimeoutRef.current = setTimeout(() => {
+            if (popoverRef.current) {
+                popoverRef.current.style.opacity = '0';
+                setTimeout(() => {
+                    if (popoverRef.current) {
+                        popoverRef.current.style.display = 'none';
+                    }
+                }, 150);
+            }
+        }, 300);
+    };
+
+    const keepPopover = () => {
+        if (hideTimeoutRef.current) {
+            clearTimeout(hideTimeoutRef.current);
+            hideTimeoutRef.current = null;
+        }
+    };
+
+    return {
+        showPopover,
+        hidePopover
+    };
+}
diff --git a/webui/static/js/hooks/useTooltip.js b/webui/static/js/hooks/useTooltip.js
new file mode 100644
index 0000000..f38d65d
--- /dev/null
+++ b/webui/static/js/hooks/useTooltip.js
@@ -0,0 +1,76 @@
+import { useRef, useEffect } from 'preact/hooks';
+import align from 'dom-align';
+
+export function useTooltip() {
+    const tooltipRef = useRef(null);
+    const hideTimeoutRef = useRef(null);
+
+    useEffect(() => {
+        // 创建 tooltip 元素
+        const tooltip = document.createElement('div');
+        tooltip.className = 'srdb-tooltip';
+        tooltip.style.cssText = `
+            position: absolute;
+            z-index: 1000;
+            background: var(--bg-elevated);
+            border: 1px solid var(--border-color);
+            border-radius: var(--radius-sm);
+            padding: 8px 12px;
+            font-size: 13px;
+            color: var(--text-primary);
+            box-shadow: var(--shadow-lg);
+            max-width: 300px;
+            word-wrap: break-word;
+            display: none;
+            pointer-events: none;
+        `;
+        document.body.appendChild(tooltip);
+        tooltipRef.current = tooltip;
+
+        return () => {
+            if (tooltipRef.current) {
+                document.body.removeChild(tooltipRef.current);
+            }
+            if (hideTimeoutRef.current) {
+                clearTimeout(hideTimeoutRef.current);
+            }
+        };
+    }, []);
+
+    const showTooltip = (target, comment) => {
+        if (!tooltipRef.current || !comment) return;
+
+        // 清除之前的隐藏定时器
+        if (hideTimeoutRef.current) {
+            clearTimeout(hideTimeoutRef.current);
+            hideTimeoutRef.current = null;
+        }
+
+        const tooltip = tooltipRef.current;
+        tooltip.textContent = comment;
+        tooltip.style.display = 'block';
+
+        // 使用 dom-align 对齐到目标元素下方
+        align(tooltip, target, {
+            points: ['tc', 'bc'],
+            offset: [0, -8],
+            overflow: {
+                adjustX: true,
+                adjustY: true
+            }
+        });
+    };
+
+    const hideTooltip = () => {
+        if (!tooltipRef.current) return;
+
+        // 延迟隐藏，避免闪烁
+        hideTimeoutRef.current = setTimeout(() => {
+            if (tooltipRef.current) {
+                tooltipRef.current.style.display = 'none';
+            }
+        }, 100);
+    };
+
+    return { showTooltip, hideTooltip };
+}
diff --git a/webui/static/js/main.js b/webui/static/js/main.js
index 9180d36..d12d574 100644
--- a/webui/static/js/main.js
+++ b/webui/static/js/main.js
@@ -1,108 +1,6 @@
-import '~/components/app.js';
-import '~/components/table-list.js';
-import '~/components/table-view.js';
-import '~/components/modal-dialog.js';
-import '~/components/theme-toggle.js';
-import '~/components/badge.js';
-import '~/components/field-icon.js';
-import '~/components/data-view.js';
-import '~/components/manifest-view.js';
-import '~/components/page-header.js';
-import { tableAPI } from '~/common/api.js';
+import { render } from 'preact';
+import { html } from 'htm/preact';
+import { App } from './components/App.js';
 
-class App {
-  constructor() {
-    // 等待 srdb-app 组件渲染完成
-    this.appContainer = document.querySelector('srdb-app');
-    this.modal = document.querySelector('srdb-modal-dialog');
-    
-    // 等待组件初始化
-    if (this.appContainer) {
-      // 使用 updateComplete 等待组件渲染完成
-      this.appContainer.updateComplete.then(() => {
-        this.tableList = this.appContainer.shadowRoot.querySelector('srdb-table-list');
-        this.tableView = this.appContainer.shadowRoot.querySelector('srdb-table-view');
-        this.pageHeader = this.appContainer.shadowRoot.querySelector('srdb-page-header');
-        this.setupEventListeners();
-      });
-    } else {
-      // 如果组件还未定义，等待它被定义
-      customElements.whenDefined('srdb-app').then(() => {
-        this.appContainer = document.querySelector('srdb-app');
-        this.appContainer.updateComplete.then(() => {
-          this.tableList = this.appContainer.shadowRoot.querySelector('srdb-table-list');
-          this.tableView = this.appContainer.shadowRoot.querySelector('srdb-table-view');
-          this.pageHeader = this.appContainer.shadowRoot.querySelector('srdb-page-header');
-          this.setupEventListeners();
-        });
-      });
-    }
-  }
-
-  setupEventListeners() {
-    // Listen for table selection
-    document.addEventListener('table-selected', (e) => {
-      const tableName = e.detail.tableName;
-      this.pageHeader.tableName = tableName;
-      this.pageHeader.view = 'data';
-      this.tableView.tableName = tableName;
-      this.tableView.view = 'data';
-      this.tableView.page = 1;
-    });
-
-    // Listen for view change from page-header
-    document.addEventListener('view-changed', (e) => {
-      this.tableView.view = e.detail.view;
-    });
-
-    // Listen for refresh request from page-header
-    document.addEventListener('refresh-view', (e) => {
-      this.tableView.loadData();
-    });
-
-    // Listen for row detail request
-    document.addEventListener('show-row-detail', async (e) => {
-      const { tableName, seq } = e.detail;
-      await this.showRowDetail(tableName, seq);
-    });
-
-    // Listen for cell content request
-    document.addEventListener('show-cell-content', (e) => {
-      this.showCellContent(e.detail.content);
-    });
-
-    // Close modal on backdrop click
-    this.modal.addEventListener('click', () => {
-      this.modal.open = false;
-    });
-  }
-
-  async showRowDetail(tableName, seq) {
-    try {
-      const data = await tableAPI.getRow(tableName, seq);
-      const content = JSON.stringify(data, null, 2);
-      
-      this.modal.title = `Row Detail - Seq: ${seq}`;
-      this.modal.content = content;
-      this.modal.open = true;
-    } catch (error) {
-      console.error('Error loading row detail:', error);
-      this.modal.title = 'Error';
-      this.modal.content = `Failed to load row detail: ${error.message}`;
-      this.modal.open = true;
-    }
-  }
-
-  showCellContent(content) {
-    this.modal.title = 'Cell Content';
-    this.modal.content = String(content);
-    this.modal.open = true;
-  }
-}
-
-// Initialize app when DOM is ready
-if (document.readyState === 'loading') {
-  document.addEventListener('DOMContentLoaded', () => new App());
-} else {
-  new App();
-}
+// 渲染应用
+render(html`<${App} />`, document.getElementById('app'));
diff --git a/webui/webui.go b/webui/webui.go
index b8cd1ba..32f35b1 100644
--- a/webui/webui.go
+++ b/webui/webui.go
@@ -17,13 +17,13 @@ import (
 //go:embed static
 var staticFS embed.FS
 
-// WebUI Web 界面处理器
+// WebUI Web 界面处理器 v2 (Preact)
 type WebUI struct {
 	db      *srdb.Database
 	handler http.Handler
 }
 
-// NewWebUI 创建 WebUI 实例
+// NewWebUI 创建 WebUI v2 实例
 func NewWebUI(db *srdb.Database) *WebUI {
 	ui := &WebUI{db: db}
 	ui.handler = ui.setupHandler()
@@ -34,7 +34,7 @@ func NewWebUI(db *srdb.Database) *WebUI {
 func (ui *WebUI) setupHandler() http.Handler {
 	mux := http.NewServeMux()
 
-	// API endpoints - 纯 JSON API
+	// API endpoints - 纯 JSON API（与 v1 共享）
 	mux.HandleFunc("/api/tables", ui.handleListTables)
 	mux.HandleFunc("/api/tables/", ui.handleTableAPI)
 
@@ -74,6 +74,7 @@ func (ui *WebUI) handleListTables(w http.ResponseWriter, r *http.Request) {
 
 	type TableListItem struct {
 		Name      string      `json:"name"`
+		RowCount  int64       `json:"row_count,omitempty"`
 		CreatedAt int64       `json:"created_at"`
 		Fields    []FieldInfo `json:"fields"`
 	}
@@ -92,8 +93,18 @@ func (ui *WebUI) handleListTables(w http.ResponseWriter, r *http.Request) {
 			})
 		}
 
+		// 尝试获取行数（通过快速查询）
+		rowCount := int64(0)
+		if rows, err := table.Query().Rows(); err == nil {
+			for rows.Next() {
+				rowCount++
+			}
+			rows.Close()
+		}
+
 		tables = append(tables, TableListItem{
 			Name:      name,
+			RowCount:  rowCount,
 			CreatedAt: 0, // TODO: Table 不再有 createdAt 字段
 			Fields:    fields,
 		})
@@ -105,7 +116,9 @@ func (ui *WebUI) handleListTables(w http.ResponseWriter, r *http.Request) {
 	})
 
 	w.Header().Set("Content-Type", "application/json")
-	json.NewEncoder(w).Encode(tables)
+	json.NewEncoder(w).Encode(map[string]any{
+		"tables": tables,
+	})
 }
 
 // handleTableAPI 处理表相关的 API 请求
@@ -217,9 +230,9 @@ func (ui *WebUI) handleTableManifest(w http.ResponseWriter, r *http.Request, tab
 	// 获取 Compaction Manager
 	compactionMgr := table.GetCompactionManager()
 
-	levels := make([]LevelInfo, 0, 7)
-	for level := range 7 {
-		// 只调用一次 GetLevel，避免重复复制文件列表
+	// 只显示 L0-L3 层
+	levels := make([]LevelInfo, 0, 4)
+	for level := range 4 {
 		files := version.GetLevel(level)
 
 		totalSize := int64(0)
@@ -236,11 +249,8 @@ func (ui *WebUI) handleTableManifest(w http.ResponseWriter, r *http.Request, tab
 			})
 		}
 
-		// 使用已计算的 totalSize 和 fileCount 计算 score，避免再次调用 GetLevel
 		score := 0.0
-		if len(files) > 0 && level < 3 { // L3 是最后一层，不需要 compaction
-			// 直接计算 score，避免调用 picker.GetLevelScore（它会再次获取 files）
-			// 使用下一级的大小限制来计算得分（从 Options 配置读取）
+		if len(files) > 0 && level < 3 {
 			nextLevelLimit := compactionMgr.GetLevelSizeLimit(level + 1)
 			if nextLevelLimit > 0 {
 				score = float64(totalSize) / float64(nextLevelLimit)
@@ -320,23 +330,23 @@ func (ui *WebUI) handleTableData(w http.ResponseWriter, r *http.Request, tableNa
 		return
 	}
 
-	// 解析分页参数
-	pageStr := r.URL.Query().Get("page")
-	pageSizeStr := r.URL.Query().Get("pageSize")
+	// 解析查询参数
+	limitStr := r.URL.Query().Get("limit")
+	offsetStr := r.URL.Query().Get("offset")
 	selectParam := r.URL.Query().Get("select") // 要选择的字段，逗号分隔
 
-	page := 1
-	pageSize := 20
+	limit := 100
+	offset := 0
 
-	if pageStr != "" {
-		if p, err := strconv.Atoi(pageStr); err == nil && p > 0 {
-			page = p
+	if limitStr != "" {
+		if l, err := strconv.Atoi(limitStr); err == nil && l > 0 && l <= 1000 {
+			limit = l
 		}
 	}
 
-	if pageSizeStr != "" {
-		if ps, err := strconv.Atoi(pageSizeStr); err == nil && ps > 0 && ps <= 1000 {
-			pageSize = ps
+	if offsetStr != "" {
+		if o, err := strconv.Atoi(offsetStr); err == nil && o >= 0 {
+			offset = o
 		}
 	}
 
@@ -344,19 +354,17 @@ func (ui *WebUI) handleTableData(w http.ResponseWriter, r *http.Request, tableNa
 	var selectedFields []string
 	if selectParam != "" {
 		selectedFields = strings.Split(selectParam, ",")
-		// 清理字段名（去除空格）
 		for i := range selectedFields {
 			selectedFields[i] = strings.TrimSpace(selectedFields[i])
 		}
 	}
 
-	// 获取 schema 用于字段类型判断
+	// 获取 schema
 	tableSchema := table.GetSchema()
 
-	// 使用 Query API 获取数据，如果指定了字段则只查询指定字段（按字段压缩优化）
+	// 使用 Query API 获取数据
 	queryBuilder := table.Query()
 	if len(selectedFields) > 0 {
-		// 确保 _seq 和 _time 总是被查询（用于构造响应）
 		fieldsWithMeta := make([]string, 0, len(selectedFields)+2)
 		hasSeq := false
 		hasTime := false
@@ -378,6 +386,7 @@ func (ui *WebUI) handleTableData(w http.ResponseWriter, r *http.Request, tableNa
 
 		queryBuilder = queryBuilder.Select(fieldsWithMeta...)
 	}
+
 	queryRows, err := queryBuilder.Rows()
 	if err != nil {
 		http.Error(w, fmt.Sprintf("Failed to query table: %v", err), http.StatusInternalServerError)
@@ -385,26 +394,23 @@ func (ui *WebUI) handleTableData(w http.ResponseWriter, r *http.Request, tableNa
 	}
 	defer queryRows.Close()
 
-	// 计算分页范围
-	offset := (page - 1) * pageSize
+	// 收集数据
+	const maxStringLength = 100
+	data := make([]map[string]any, 0, limit)
 	currentIndex := 0
-
-	// 直接在遍历时进行分页和字段处理
-	const maxStringLength = 100 // 最大字符串长度
-	data := make([]map[string]any, 0, pageSize)
 	totalRows := int64(0)
 
 	for queryRows.Next() {
 		totalRows++
 
-		// 跳过不在当前页的数据
+		// 跳过 offset 之前的数据
 		if currentIndex < offset {
 			currentIndex++
 			continue
 		}
 
-		// 已经收集够当前页的数据
-		if len(data) >= pageSize {
+		// 已经收集够数据
+		if len(data) >= limit {
 			continue
 		}
 
@@ -440,11 +446,10 @@ func (ui *WebUI) handleTableData(w http.ResponseWriter, r *http.Request, tableNa
 	}
 
 	response := map[string]any{
-		"data":       data,
-		"page":       page,
-		"pageSize":   pageSize,
-		"totalRows":  totalRows,
-		"totalPages": (totalRows + int64(pageSize) - 1) / int64(pageSize),
+		"data":      data,
+		"limit":     limit,
+		"offset":    offset,
+		"totalRows": totalRows,
 	}
 
 	w.Header().Set("Content-Type", "application/json")