diff --git a/z.ai/notes/index.php b/z.ai/notes/index.php
index 189725d..baa4ebd 100644
--- a/z.ai/notes/index.php
+++ b/z.ai/notes/index.php
@@ -170,17 +170,12 @@ function downloadAndSaveImage($url) {
 
 // 自动格式化链接
 function autoFormatLinks($content) {
-    // 匹配非Markdown格式的URL
-    $pattern = '/(?<!\]\()https?:\/\/[^\s\)]+(?!\))/i';
+    // 匹配非Markdown格式的URL，但排除已经是Markdown链接的部分
+    $pattern = '/(?<![\[\(])https?:\/\/[^\s\)]+(?![\)\]])/i';
     
     $content = preg_replace_callback($pattern, function($matches) {
         $url = $matches[0];
         
-        // 如果已经是Markdown链接格式，则跳过
-        if (preg_match('/\[' . preg_quote($url, '/') . '\]\(' . preg_quote($url, '/') . '\)/', $content)) {
-            return $url;
-        }
-        
         // 如果是图片URL，则跳过（已在processExternalImages中处理）
         if (isExternalImage($url)) {
             return $url;
@@ -234,11 +229,28 @@ function initDatabase() {
             )
         ');
         
+        // 创建分享表
+        $db->exec('
+            CREATE TABLE IF NOT EXISTS shares (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                note_id INTEGER NOT NULL,
+                share_token TEXT UNIQUE NOT NULL,
+                password TEXT,
+                view_limit INTEGER DEFAULT 0,
+                view_count INTEGER DEFAULT 0,
+                expires_at DATETIME,
+                created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (note_id) REFERENCES notes (id) ON DELETE CASCADE
+            )
+        ');
+        
         // 创建索引
         $db->exec('CREATE INDEX IF NOT EXISTS idx_notes_title ON notes(title)');
         $db->exec('CREATE INDEX IF NOT EXISTS idx_notes_tags ON notes(tags)');
         $db->exec('CREATE INDEX IF NOT EXISTS idx_notes_created ON notes(created_at)');
         $db->exec('CREATE INDEX IF NOT EXISTS idx_attachments_note_id ON attachments(note_id)');
+        $db->exec('CREATE INDEX IF NOT EXISTS idx_shares_token ON shares(share_token)');
+        $db->exec('CREATE INDEX IF NOT EXISTS idx_shares_note_id ON shares(note_id)');
         
         return $db;
     } catch (Exception $e) {
@@ -569,6 +581,75 @@ function isLoggedIn() {
     return isset($_SESSION['user_id']);
 }
 
+// 创建分享
+function createShare($noteId, $password = null, $viewLimit = 0, $expiresAt = null) {
+    $db = getDB();
+    
+    // 生成唯一的分享令牌
+    $shareToken = bin2hex(random_bytes(16));
+    
+    $stmt = $db->prepare('INSERT INTO shares (note_id, share_token, password, view_limit, expires_at) VALUES (?, ?, ?, ?, ?)');
+    $stmt->bindValue(1, $noteId, SQLITE3_INTEGER);
+    $stmt->bindValue(2, $shareToken, SQLITE3_TEXT);
+    $stmt->bindValue(3, $password ? password_hash($password, PASSWORD_DEFAULT) : null, SQLITE3_TEXT);
+    $stmt->bindValue(4, $viewLimit, SQLITE3_INTEGER);
+    $stmt->bindValue(5, $expiresAt, SQLITE3_TEXT);
+    $stmt->execute();
+    
+    return $shareToken;
+}
+
+// 获取分享信息
+function getShareByToken($token) {
+    $db = getDB();
+    $stmt = $db->prepare('SELECT * FROM shares WHERE share_token = ?');
+    $stmt->bindValue(1, $token, SQLITE3_TEXT);
+    $result = $stmt->execute();
+    $share = $result->fetchArray(SQLITE3_ASSOC);
+    
+    if ($share) {
+        // 检查是否过期
+        if ($share['expires_at'] && strtotime($share['expires_at']) < time()) {
+            return null;
+        }
+        
+        // 检查查看次数限制
+        if ($share['view_limit'] > 0 && $share['view_count'] >= $share['view_limit']) {
+            return null;
+        }
+        
+        // 增加查看次数
+        $updateStmt = $db->prepare('UPDATE shares SET view_count = view_count + 1 WHERE id = ?');
+        $updateStmt->bindValue(1, $share['id'], SQLITE3_INTEGER);
+        $updateStmt->execute();
+    }
+    
+    return $share;
+}
+
+// 获取笔记的分享列表
+function getNoteShares($noteId) {
+    $db = getDB();
+    $stmt = $db->prepare('SELECT * FROM shares WHERE note_id = ? ORDER BY created_at DESC');
+    $stmt->bindValue(1, $noteId, SQLITE3_INTEGER);
+    $result = $stmt->execute();
+    $shares = [];
+    
+    while ($row = $result->fetchArray(SQLITE3_ASSOC)) {
+        $shares[] = $row;
+    }
+    
+    return $shares;
+}
+
+// 删除分享
+function deleteShare($id) {
+    $db = getDB();
+    $stmt = $db->prepare('DELETE FROM shares WHERE id = ?');
+    $stmt->bindValue(1, $id, SQLITE3_INTEGER);
+    return $stmt->execute();
+}
+
 // 处理登录
 if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['action'])) {
     if ($_POST['action'] === 'init') {
@@ -652,6 +733,34 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['action'])) {
         } else {
             $error = '标题和内容不能为空';
         }
+    } elseif ($_POST['action'] === 'create_share') {
+        if (!isLoggedIn()) {
+            header('Location: ?');
+            exit;
+        }
+        
+        $noteId = intval($_POST['note_id'] ?? 0);
+        $password = trim($_POST['share_password'] ?? '');
+        $viewLimit = intval($_POST['view_limit'] ?? 0);
+        $expiresIn = intval($_POST['expires_in'] ?? 0);
+        
+        // 计算过期时间
+        $expiresAt = null;
+        if ($expiresIn > 0) {
+            $expiresAt = date('Y-m-d H:i:s', time() + $expiresIn * 3600); // 小时转换为秒
+        }
+        
+        $shareToken = createShare($noteId, $password ?: null, $viewLimit, $expiresAt);
+        
+        if ($shareToken) {
+            $shareUrl = getBaseUrl() . '/' . getCurrentFile() . '?share=' . $shareToken;
+            $_SESSION['share_success'] = '分享链接已创建: <a href="' . $shareUrl . '" target="_blank">' . $shareUrl . '</a>';
+        } else {
+            $error = '创建分享失败';
+        }
+        
+        header('Location: ?view=' . $noteId);
+        exit;
     }
 }
 
@@ -671,6 +780,14 @@ if (isset($_GET['delete_attachment']) && isLoggedIn()) {
     exit;
 }
 
+// 处理删除分享
+if (isset($_GET['delete_share']) && isLoggedIn()) {
+    $id = intval($_GET['delete_share']);
+    deleteShare($id);
+    header('Location: ' . $_SERVER['HTTP_REFERER']);
+    exit;
+}
+
 // 处理登出
 if (isset($_GET['logout'])) {
     session_destroy();
@@ -686,6 +803,392 @@ if (isset($_GET['logout'])) {
 // 获取导航URL
  $homeUrl = getHomeUrl();
 
+// 处理分享访问
+if (isset($_GET['share'])) {
+    $shareToken = $_GET['share'];
+    $share = getShareByToken($shareToken);
+    
+    if (!$share) {
+        $shareError = '分享链接无效或已过期';
+    } else {
+        $note = getNote($share['note_id']);
+        if (!$note) {
+            $shareError = '笔记不存在';
+        } else {
+            // 检查是否需要密码
+            if ($share['password'] && !isset($_SESSION['share_authenticated'][$shareToken])) {
+                if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['action']) && $_POST['action'] === 'verify_share_password') {
+                    $password = $_POST['share_password'] ?? '';
+                    if (password_verify($password, $share['password'])) {
+                        $_SESSION['share_authenticated'][$shareToken] = true;
+                    } else {
+                        $shareError = '密码错误';
+                    }
+                }
+                
+                if (!isset($_SESSION['share_authenticated'][$shareToken])) {
+                    // 显示密码输入页面
+                    ?>
+                    <!DOCTYPE html>
+                    <html lang="zh-CN">
+                    <head>
+                        <meta charset="UTF-8">
+                        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+                        <title>密码验证 - <?php echo APP_NAME; ?></title>
+                        <style>
+                            * {
+                                margin: 0;
+                                padding: 0;
+                                box-sizing: border-box;
+                            }
+
+                            body {
+                                font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
+                                background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+                                min-height: 100vh;
+                                display: flex;
+                                align-items: center;
+                                justify-content: center;
+                            }
+
+                            .login-container {
+                                background: white;
+                                padding: 40px;
+                                border-radius: 12px;
+                                box-shadow: 0 20px 60px rgba(0,0,0,0.3);
+                                width: 100%;
+                                max-width: 400px;
+                            }
+
+                            .login-header {
+                                text-align: center;
+                                margin-bottom: 30px;
+                            }
+
+                            .login-header h1 {
+                                font-size: 28px;
+                                color: #333;
+                                margin-bottom: 10px;
+                            }
+
+                            .login-header p {
+                                color: #666;
+                                font-size: 14px;
+                            }
+
+                            .form-group {
+                                margin-bottom: 20px;
+                            }
+
+                            .form-label {
+                                display: block;
+                                margin-bottom: 8px;
+                                color: #555;
+                                font-size: 14px;
+                            }
+
+                            .form-input {
+                                width: 100%;
+                                padding: 12px;
+                                border: 1px solid #ddd;
+                                border-radius: 6px;
+                                font-size: 14px;
+                                transition: border-color 0.3s;
+                            }
+
+                            .form-input:focus {
+                                outline: none;
+                                border-color: #667eea;
+                            }
+
+                            .login-btn {
+                                width: 100%;
+                                padding: 12px;
+                                background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+                                color: white;
+                                border: none;
+                                border-radius: 6px;
+                                font-size: 16px;
+                                cursor: pointer;
+                                transition: transform 0.2s;
+                            }
+
+                            .login-btn:hover {
+                                transform: translateY(-2px);
+                            }
+
+                            .error {
+                                background: #fee;
+                                color: #c33;
+                                padding: 10px;
+                                border-radius: 6px;
+                                margin-bottom: 20px;
+                                font-size: 14px;
+                            }
+                        </style>
+                    </head>
+                    <body>
+                        <div class="login-container">
+                            <div class="login-header">
+                                <h1><?php echo APP_NAME; ?></h1>
+                                <p>此分享需要密码验证</p>
+                            </div>
+                            
+                            <?php if (isset($shareError)): ?>
+                            <div class="error"><?php echo $shareError; ?></div>
+                            <?php endif; ?>
+                            
+                            <form method="post">
+                                <input type="hidden" name="action" value="verify_share_password">
+                                <div class="form-group">
+                                    <label class="form-label">请输入分享密码</label>
+                                    <input type="password" name="share_password" class="form-input" required>
+                                </div>
+                                <button type="submit" class="login-btn">验证</button>
+                            </form>
+                        </div>
+                    </body>
+                    </html>
+                    <?php
+                    exit;
+                }
+            }
+            
+            // 显示分享的笔记
+            ?>
+            <!DOCTYPE html>
+            <html lang="zh-CN">
+            <head>
+                <meta charset="UTF-8">
+                <meta name="viewport" content="width=device-width, initial-scale=1.0">
+                <title><?php echo htmlspecialchars($note['title']); ?> - <?php echo APP_NAME; ?></title>
+                <style>
+                    * {
+                        margin: 0;
+                        padding: 0;
+                        box-sizing: border-box;
+                    }
+
+                    :root {
+                        --bg-primary: #ffffff;
+                        --bg-secondary: #f8f9fa;
+                        --bg-tertiary: #e9ecef;
+                        --text-primary: #2c3e50;
+                        --text-secondary: #6c757d;
+                        --text-muted: #adb5bd;
+                        --border-color: #dee2e6;
+                        --accent-color: #3498db;
+                        --success-color: #27ae60;
+                        --danger-color: #e74c3c;
+                        --hover-bg: #f1f3f5;
+                        --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
+                        --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
+                        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+                    }
+
+                    [data-theme="dark"] {
+                        --bg-primary: #1a1a1a;
+                        --bg-secondary: #2d2d2d;
+                        --bg-tertiary: #404040;
+                        --text-primary: #e9ecef;
+                        --text-secondary: #adb5bd;
+                        --text-muted: #6c757d;
+                        --border-color: #495057;
+                        --accent-color: #5dade2;
+                        --hover-bg: #343434;
+                        --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
+                        --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
+                    }
+
+                    body {
+                        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
+                        background: var(--bg-primary);
+                        color: var(--text-primary);
+                        line-height: 1.6;
+                        transition: var(--transition);
+                        min-height: 100vh;
+                    }
+
+                    .container {
+                        max-width: 900px;
+                        margin: 0 auto;
+                        padding: 0 20px;
+                    }
+
+                    /* Header */
+                    header {
+                        background: var(--bg-secondary);
+                        border-bottom: 1px solid var(--border-color);
+                        padding: 20px 0;
+                    }
+
+                    .header-content {
+                        display: flex;
+                        justify-content: space-between;
+                        align-items: center;
+                    }
+
+                    .logo {
+                        font-size: 24px;
+                        font-weight: 600;
+                        color: var(--text-primary);
+                    }
+
+                    .logo-link {
+                        text-decoration: none;
+                        color: inherit;
+                        transition: var(--transition);
+                    }
+
+                    .logo-link:hover {
+                        opacity: 0.8;
+                    }
+
+                    .share-info {
+                        color: var(--text-secondary);
+                        font-size: 14px;
+                    }
+
+                    /* Note View */
+                    .note-view {
+                        background: var(--bg-secondary);
+                        border-radius: 8px;
+                        padding: 30px;
+                        margin-top: 30px;
+                        border: 1px solid var(--border-color);
+                    }
+
+                    .note-view-header {
+                        margin-bottom: 20px;
+                        padding-bottom: 20px;
+                        border-bottom: 1px solid var(--border-color);
+                    }
+
+                    .note-view-title {
+                        font-size: 28px;
+                        font-weight: 600;
+                        color: var(--text-primary);
+                        margin-bottom: 10px;
+                    }
+
+                    .note-view-meta {
+                        color: var(--text-muted);
+                        font-size: 14px;
+                    }
+
+                    .note-view-content {
+                        line-height: 1.8;
+                        font-size: 16px;
+                    }
+
+                    .note-view-tags {
+                        margin-top: 30px;
+                        padding-top: 20px;
+                        border-top: 1px solid var(--border-color);
+                    }
+
+                    .sidebar-title {
+                        font-size: 16px;
+                        font-weight: 600;
+                        margin-bottom: 15px;
+                        color: var(--text-primary);
+                    }
+
+                    .tag-list {
+                        display: flex;
+                        flex-wrap: wrap;
+                        gap: 8px;
+                    }
+
+                    .tag {
+                        padding: 4px 10px;
+                        background: var(--bg-tertiary);
+                        color: var(--text-secondary);
+                        border-radius: 12px;
+                        font-size: 12px;
+                    }
+
+                    /* Footer */
+                    footer {
+                        margin-top: 40px;
+                        padding: 20px 0;
+                        text-align: center;
+                        color: var(--text-muted);
+                        font-size: 14px;
+                        border-top: 1px solid var(--border-color);
+                    }
+
+                    /* Responsive */
+                    @media (max-width: 768px) {
+                        .note-view-title {
+                            font-size: 24px;
+                        }
+                    }
+                </style>
+            </head>
+            <body>
+                <header>
+                    <div class="container">
+                        <div class="header-content">
+                            <div class="logo">
+                                <a href="<?php echo getBaseUrl(); ?>" class="logo-link">
+                                    <?php echo APP_NAME; ?>
+                                </a>
+                            </div>
+                            <div class="share-info">
+                                分享笔记
+                                <?php if ($share['view_limit'] > 0): ?>
+                                · 剩余查看次数: <?php echo $share['view_limit'] - $share['view_count']; ?>
+                                <?php endif; ?>
+                                <?php if ($share['expires_at']): ?>
+                                · 过期时间: <?php echo date('Y-m-d H:i', strtotime($share['expires_at'])); ?>
+                                <?php endif; ?>
+                            </div>
+                        </div>
+                    </div>
+                </header>
+
+                <div class="container">
+                    <div class="note-view">
+                        <div class="note-view-header">
+                            <div class="note-view-title"><?php echo htmlspecialchars($note['title']); ?></div>
+                            <div class="note-view-meta">
+                                创建于 <?php echo date('Y-m-d H:i', strtotime($note['created_at'])); ?>
+                                <?php if ($note['updated_at'] !== $note['created_at']): ?>
+                                · 更新于 <?php echo date('Y-m-d H:i', strtotime($note['updated_at'])); ?>
+                                <?php endif; ?>
+                            </div>
+                        </div>
+                        <div class="note-view-content">
+                            <?php echo markdownToHtml($note['content']); ?>
+                        </div>
+                        
+                        <?php if ($note['tags']): ?>
+                        <div class="note-view-tags">
+                            <div class="sidebar-title">标签</div>
+                            <div class="tag-list">
+                                <?php foreach (explode(',', $note['tags']) as $tag): ?>
+                                <span class="tag"><?php echo htmlspecialchars(trim($tag)); ?></span>
+                                <?php endforeach; ?>
+                            </div>
+                        </div>
+                        <?php endif; ?>
+                    </div>
+                </div>
+
+                <footer>
+                    <div class="container">
+                        <p>由 <?php echo APP_NAME; ?> 强力驱动</p>
+                    </div>
+                </footer>
+            </body>
+            </html>
+            <?php
+            exit;
+        }
+    }
+}
+
 // 如果未初始化，显示初始化页面
 if (!isInitialized()) {
 ?>
@@ -1463,7 +1966,7 @@ if (isset($_GET['edit'])) {
             color: var(--text-secondary);
         }
 
-        .form-input, .form-textarea {
+        .form-input, .form-textarea, .form-select {
             width: 100%;
             padding: 10px;
             border: 1px solid var(--border-color);
@@ -1475,7 +1978,7 @@ if (isset($_GET['edit'])) {
             transition: var(--transition);
         }
 
-        .form-input:focus, .form-textarea:focus {
+        .form-input:focus, .form-textarea:focus, .form-select:focus {
             outline: none;
             border-color: var(--accent-color);
         }
@@ -1703,6 +2206,137 @@ if (isset($_GET['edit'])) {
             display: none;
         }
 
+        /* Share Section */
+        .share-section {
+            margin-top: 20px;
+            padding: 15px;
+            background: var(--bg-tertiary);
+            border-radius: 6px;
+        }
+
+        .share-title {
+            font-size: 14px;
+            font-weight: 600;
+            margin-bottom: 10px;
+            color: var(--text-primary);
+        }
+
+        .share-list {
+            display: flex;
+            flex-direction: column;
+            gap: 10px;
+        }
+
+        .share-item {
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+            padding: 10px;
+            background: var(--bg-primary);
+            border-radius: 4px;
+            font-size: 13px;
+            transition: var(--transition);
+        }
+
+        .share-item:hover {
+            background: var(--hover-bg);
+        }
+
+        .share-info {
+            display: flex;
+            flex-direction: column;
+            gap: 5px;
+        }
+
+        .share-link {
+            color: var(--accent-color);
+            text-decoration: none;
+            font-family: monospace;
+            word-break: break-all;
+        }
+
+        .share-link:hover {
+            text-decoration: underline;
+        }
+
+        .share-meta {
+            color: var(--text-muted);
+            font-size: 11px;
+        }
+
+        .share-actions {
+            display: flex;
+            gap: 5px;
+        }
+
+        .share-btn {
+            padding: 4px 8px;
+            background: none;
+            border: none;
+            color: var(--text-muted);
+            cursor: pointer;
+            font-size: 12px;
+            transition: var(--transition);
+        }
+
+        .share-btn:hover {
+            color: var(--accent-color);
+        }
+
+        .share-btn.delete:hover {
+            color: var(--danger-color);
+        }
+
+        .share-form {
+            display: flex;
+            flex-wrap: wrap;
+            gap: 10px;
+            margin-top: 15px;
+        }
+
+        .share-form-group {
+            flex: 1;
+            min-width: 150px;
+        }
+
+        .share-form-label {
+            display: block;
+            margin-bottom: 5px;
+            color: var(--text-secondary);
+            font-size: 12px;
+        }
+
+        .share-form-input {
+            width: 100%;
+            padding: 8px;
+            border: 1px solid var(--border-color);
+            border-radius: 4px;
+            background: var(--bg-primary);
+            color: var(--text-primary);
+            font-size: 12px;
+            transition: var(--transition);
+        }
+
+        .share-form-input:focus {
+            outline: none;
+            border-color: var(--accent-color);
+        }
+
+        .share-form-btn {
+            padding: 8px 16px;
+            background: var(--accent-color);
+            color: white;
+            border: none;
+            border-radius: 4px;
+            font-size: 12px;
+            cursor: pointer;
+            transition: var(--transition);
+        }
+
+        .share-form-btn:hover {
+            opacity: 0.9;
+        }
+
         /* Modal */
         .modal {
             display: none;
@@ -1767,6 +2401,21 @@ if (isset($_GET['edit'])) {
             margin-bottom: 20px;
         }
 
+        /* Success Message */
+        .success-message {
+            background: var(--success-color);
+            color: white;
+            padding: 10px 15px;
+            border-radius: 6px;
+            margin-bottom: 20px;
+            font-size: 14px;
+        }
+
+        .success-message a {
+            color: white;
+            text-decoration: underline;
+        }
+
         /* Animations */
         @keyframes slideUp {
             from {
@@ -1818,6 +2467,14 @@ if (isset($_GET['edit'])) {
                 padding: 4px 6px;
                 font-size: 12px;
             }
+
+            .share-form {
+                flex-direction: column;
+            }
+
+            .share-form-group {
+                min-width: 100%;
+            }
         }
     </style>
 </head>
@@ -1879,6 +2536,7 @@ if (isset($_GET['edit'])) {
                 </div>
                 <div class="note-view-actions">
                     <button class="btn" onclick="editNote(<?php echo $viewNote['id']; ?>)">编辑</button>
+                    <button class="btn" onclick="shareNote(<?php echo $viewNote['id']; ?>)">分享</button>
                     <button class="btn" onclick="deleteNote(<?php echo $viewNote['id']; ?>)" style="color: var(--danger-color);">删除</button>
                 </div>
             </div>
@@ -1911,6 +2569,41 @@ if (isset($_GET['edit'])) {
             </div>
             <?php endif; ?>
             
+            <!-- Shares -->
+            <?php $shares = getNoteShares($viewNote['id']); ?>
+            <?php if (!empty($shares)): ?>
+            <div class="share-section">
+                <div class="share-title">分享链接</div>
+                <div class="share-list">
+                    <?php foreach ($shares as $share): ?>
+                    <div class="share-item">
+                        <div class="share-info">
+                            <a href="<?php echo getBaseUrl() . '/' . getCurrentFile() . '?share=' . $share['share_token']; ?>" class="share-link" target="_blank">
+                                <?php echo getBaseUrl() . '/' . getCurrentFile() . '?share=' . $share['share_token']; ?>
+                            </a>
+                            <div class="share-meta">
+                                创建于 <?php echo date('Y-m-d H:i', strtotime($share['created_at'])); ?>
+                                <?php if ($share['view_limit'] > 0): ?>
+                                · 剩余查看: <?php echo $share['view_limit'] - $share['view_count']; ?>
+                                <?php endif; ?>
+                                <?php if ($share['expires_at']): ?>
+                                · 过期: <?php echo date('Y-m-d H:i', strtotime($share['expires_at'])); ?>
+                                <?php endif; ?>
+                                <?php if ($share['password']): ?>
+                                · 有密码保护
+                                <?php endif; ?>
+                            </div>
+                        </div>
+                        <div class="share-actions">
+                            <button class="share-btn" onclick="copyShareLink('<?php echo getBaseUrl() . '/' . getCurrentFile() . '?share=' . $share['share_token']; ?>')">复制</button>
+                            <button class="share-btn delete" onclick="deleteShare(<?php echo $share['id']; ?>)">删除</button>
+                        </div>
+                    </div>
+                    <?php endforeach; ?>
+                </div>
+            </div>
+            <?php endif; ?>
+            
             <?php if ($viewNote['tags']): ?>
             <div class="note-view-tags">
                 <div class="sidebar-title">标签</div>
@@ -2053,6 +2746,12 @@ if (isset($_GET['edit'])) {
                     <div class="notes-count">共 <?php echo $totalNotes; ?> 篇</div>
                 </div>
 
+                <?php if (isset($_SESSION['share_success'])): ?>
+                <div class="success-message">
+                    <?php echo $_SESSION['share_success']; unset($_SESSION['share_success']); ?>
+                </div>
+                <?php endif; ?>
+
                 <?php if (empty($notes)): ?>
                 <div class="empty-state">
                     <div class="empty-icon">📝</div>
@@ -2076,10 +2775,11 @@ if (isset($_GET['edit'])) {
                             <div class="note-actions" onclick="event.stopPropagation()">
                                 <button class="note-btn" onclick="viewNote(<?php echo $note['id']; ?>)">👁️</button>
                                 <button class="note-btn" onclick="editNote(<?php echo $note['id']; ?>)">✏️</button>
+                                <button class="note-btn" onclick="shareNote(<?php echo $note['id']; ?>)">🔗</button>
                                 <button class="note-btn delete" onclick="deleteNote(<?php echo $note['id']; ?>)">🗑️</button>
                             </div>
                         </div>
-                        <div class="note-content"><?php echo htmlspecialchars(mb_substr(strip_tags($note['content']), 0, 200)); ?>...</div>
+                        <div class="note-content"><?php echo htmlspecialchars(substr(strip_tags($note['content']), 0, 200)); ?>...</div>
                         <?php if ($note['tags']): ?>
                         <div class="note-tags">
                             <?php foreach (explode(',', $note['tags']) as $noteTag): ?>
@@ -2142,6 +2842,43 @@ if (isset($_GET['edit'])) {
         <?php endif; ?>
     </div>
 
+    <!-- Share Modal -->
+    <div class="modal" id="shareModal">
+        <div class="modal-content">
+            <div class="modal-header">
+                <span class="close-modal" onclick="closeShareModal()">&times;</span>
+                <div class="modal-title">分享笔记</div>
+            </div>
+            <?php if (isset($error)): ?>
+            <div style="color: var(--danger-color); margin-bottom: 15px;"><?php echo $error; ?></div>
+            <?php endif; ?>
+            <form method="post" id="shareForm">
+                <input type="hidden" name="action" value="create_share">
+                <input type="hidden" name="note_id" id="shareNoteId">
+                <div class="form-group">
+                    <label class="form-label">分享密码（可选）</label>
+                    <input type="password" name="share_password" class="form-input" placeholder="留空则无需密码">
+                </div>
+                <div class="form-group">
+                    <label class="form-label">查看次数限制（0为无限制）</label>
+                    <input type="number" name="view_limit" class="form-input" min="0" value="0">
+                </div>
+                <div class="form-group">
+                    <label class="form-label">有效期（小时，0为永久）</label>
+                    <select name="expires_in" class="form-select">
+                        <option value="0">永久</option>
+                        <option value="1">1小时</option>
+                        <option value="6">6小时</option>
+                        <option value="24">1天</option>
+                        <option value="168">1周</option>
+                        <option value="720">1月</option>
+                    </select>
+                </div>
+                <button type="submit" class="btn btn-primary" style="width: 100%;">创建分享链接</button>
+            </form>
+        </div>
+    </div>
+
     <!-- Password Modal -->
     <div class="modal" id="passwordModal">
         <div class="modal-content">
@@ -2456,6 +3193,12 @@ if (isset($_GET['edit'])) {
             window.location.href = '?edit=' + id;
         }
 
+        // Share Note
+        function shareNote(id) {
+            document.getElementById('shareNoteId').value = id;
+            document.getElementById('shareModal').classList.add('active');
+        }
+
         // Delete Note
         function deleteNote(id) {
             if (confirm('确定要删除这篇笔记吗？')) {
@@ -2470,6 +3213,35 @@ if (isset($_GET['edit'])) {
             }
         }
 
+        // Delete Share
+        function deleteShare(id) {
+            if (confirm('确定要删除这个分享链接吗？')) {
+                window.location.href = '?delete_share=' + id;
+            }
+        }
+
+        // Copy Share Link
+        function copyShareLink(url) {
+            navigator.clipboard.writeText(url).then(() => {
+                alert('分享链接已复制到剪贴板');
+            }).catch(err => {
+                console.error('复制失败:', err);
+                // 降级方案
+                const textArea = document.createElement('textarea');
+                textArea.value = url;
+                document.body.appendChild(textArea);
+                textArea.select();
+                document.execCommand('copy');
+                document.body.removeChild(textArea);
+                alert('分享链接已复制到剪贴板');
+            });
+        }
+
+        // Share Modal
+        function closeShareModal() {
+            document.getElementById('shareModal').classList.remove('active');
+        }
+
         // Password Modal
         function openPasswordModal() {
             document.getElementById('passwordModal').classList.add('active');
@@ -2480,6 +3252,12 @@ if (isset($_GET['edit'])) {
         }
 
         // Close modal when clicking outside
+        document.getElementById('shareModal').addEventListener('click', (e) => {
+            if (e.target === e.currentTarget) {
+                closeShareModal();
+            }
+        });
+
         document.getElementById('passwordModal').addEventListener('click', (e) => {
             if (e.target === e.currentTarget) {
                 closePasswordModal();