feat: 新增阅读数功能

- 数据库添加 views 字段，兼容旧数据库自动添加
- API 新增 /api/items/<id>/view 接口增加阅读数
- 列表显示阅读数（👁图标）
- 详情页显示阅读数，点击详情时自动增加

README.md

@@ -141,6 +141,13 @@ xian-favor/
 
 ## 版本历史
 
+- **v2.4.0** (2026-04-16): 数据库备份机制
+  - 自动备份：每天 04:00 执行
+  - 手动备份：页面一键操作
+  - 备份清理规则：保留30天 + 每月第一天永久保留
+  - 手动备份最多保留10个
+  - 支持恢复备份和删除备份
+  - 备份管理页面入口在侧边栏
 - **v2.3.2** (2026-04-16): 搜索功能修复
   - 修复 debounce 函数定义顺序问题
   - 搜索框输入后可正常过滤列表

xian_favor/api.py

@@ -17,15 +17,39 @@ CORS(app)
 @app.route('/api/items', methods=['GET'])
 def list_items():
     """列出条目"""
+    starred_param = request.args.get('starred')
+    starred = None
+    if starred_param == 'true' or starred_param == '1':
+        starred = True
+    elif starred_param == 'false' or starred_param == '0':
+        starred = False
+    
     items = db.list_items(
         type=request.args.get('type'),
         status=request.args.get('status'),
         tag=request.args.get('tag'),
         keyword=request.args.get('keyword'),
+        starred=starred,
+        sort_by=request.args.get('sort_by'),
+        sort_order=request.args.get('sort_order'),
         limit=int(request.args.get('limit', 50)),
         offset=int(request.args.get('offset', 0))
     )
-    return jsonify({'success': True, 'data': items})
+    
+    # 为每个条目添加内容统计
+    for item in items:
+        item['content_stats'] = calculate_content_stats(item)
+    
+    # 获取符合条件的总数（用于分页）
+    total = db.count_items(
+        type=request.args.get('type'),
+        status=request.args.get('status'),
+        tag=request.args.get('tag'),
+        keyword=request.args.get('keyword'),
+        starred=starred
+    )
+    
+    return jsonify({'success': True, 'data': items, 'total': total})
 
 
 @app.route('/api/items', methods=['POST'])
@@ -51,7 +75,8 @@ def create_item():
             priority=data.get('priority', 'medium'),
             due_date=data.get('due_date'),
             note=data.get('note'),
-            tags=data.get('tags', [])
+            tags=data.get('tags', []),
+            is_starred=data.get('is_starred', False)
         )
         item = db.get_item(item_id)
         return jsonify({'success': True, 'data': item}), 201
@@ -68,9 +93,33 @@ def get_item(item_id):
     # 获取邮件发送历史
     email_logs = db.get_email_logs(item_id)
     item['email_logs'] = email_logs
+    # 添加内容统计
+    item['content_stats'] = calculate_content_stats(item)
     return jsonify({'success': True, 'data': item})
 
 
+def calculate_content_stats(item):
+    """计算内容统计：有效行数、总字数"""
+    # 合计所有文本内容
+    all_text = ''
+    if item.get('content'):
+        all_text += item['content'] + '\n'
+    if item.get('note'):
+        all_text += item['note'] + '\n'
+    
+    if not all_text.strip():
+        return {'lines': 0, 'chars': 0}
+    
+    # 有效行数（去除空行）
+    lines = [line for line in all_text.split('\n') if line.strip()]
+    line_count = len(lines)
+    
+    # 总字数（去除空格后的字符数）
+    char_count = len(all_text.replace(' ', '').replace('\n', '').replace('\t', '').strip())
+    
+    return {'lines': line_count, 'chars': char_count}
+
+
 @app.route('/api/items/<int:item_id>', methods=['PUT'])
 def update_item(item_id):
     """更新条目"""
@@ -97,6 +146,34 @@ def delete_item(item_id):
     return jsonify({'success': False, 'error': '条目不存在'}), 404
 
 
+@app.route('/api/items/<int:item_id>/star', methods=['POST'])
+def toggle_star_item(item_id):
+    """切换重点关注状态"""
+    if db.toggle_star(item_id):
+        item = db.get_item(item_id)
+        return jsonify({'success': True, 'data': item})
+    return jsonify({'success': False, 'error': '条目不存在'}), 404
+
+
+@app.route('/api/items/<int:item_id>/star/<int:status>', methods=['POST'])
+def set_star_item(item_id, status):
+    """设置重点关注状态 (status: 1=重点关注, 0=取消重点关注)"""
+    starred = status == 1
+    if db.set_star(item_id, starred):
+        item = db.get_item(item_id)
+        return jsonify({'success': True, 'data': item})
+    return jsonify({'success': False, 'error': '条目不存在'}), 404
+
+
+@app.route('/api/items/<int:item_id>/view', methods=['POST'])
+def increment_views(item_id):
+    """增加阅读数"""
+    if db.increment_views(item_id):
+        item = db.get_item(item_id)
+        return jsonify({'success': True, 'data': item})
+    return jsonify({'success': False, 'error': '条目不存在'}), 404
+
+
 @app.route('/api/items/<int:item_id>/done', methods=['POST'])
 def complete_item(item_id):
     """完成待办"""
@@ -587,6 +664,9 @@ INDEX_TEMPLATE = '''
         .type-link { border-left: 4px solid #28a745; }
         .type-column { border-left: 4px solid #6f42c1; }
         .type-todo { border-left: 4px solid #ffc107; }
+        .is-starred { border-left: 4px solid #ffc107; background: #fffbe6; }
+        .is-starred:hover { background: #fff9e0; }
+        .star-btn { font-size: 11px; }
         .status-pending { color: #ffc107; }
         .status-in_progress { color: #17a2b8; }
         .status-completed { color: #28a745; text-decoration: line-through; }
@@ -606,6 +686,7 @@ INDEX_TEMPLATE = '''
             </div>
             <nav>
                 <a href="#" class="active" data-filter="all"><i class="bi bi-inbox"></i> 全部</a>
+                <a href="#" data-filter="starred"><i class="bi bi-star-fill" style="color:#ffc107;"></i> 重点关注</a>
                 <a href="#" data-filter="text"><i class="bi bi-file-text"></i> 文本</a>
                 <a href="#" data-filter="link"><i class="bi bi-link-45deg"></i> 链接</a>
                 <a href="#" data-filter="column"><i class="bi bi-newspaper"></i> 专栏</a>
@@ -644,6 +725,15 @@ INDEX_TEMPLATE = '''
                         <option value="column">专栏</option>
                         <option value="todo">待办</option>
                     </select>
+                    <select id="sortBy" class="form-select" style="width: 130px;" onchange="changeSort()">
+                        <option value="">默认排序</option>
+                        <option value="created_at">创建时间</option>
+                        <option value="updated_at">更新时间</option>
+                    </select>
+                    <select id="sortOrder" class="form-select" style="width: 100px;" onchange="changeSort()">
+                        <option value="desc">降序 ↓</option>
+                        <option value="asc">升序 ↑</option>
+                    </select>
                 </div>
                 <button class="btn btn-outline-info me-2" onclick="showAIAddModal()" title="AI自动添加">
                     <i class="bi bi-robot"></i> AI添加
@@ -775,6 +865,14 @@ INDEX_TEMPLATE = '''
                         <label class="form-label">详情/备注</label>
                         <textarea id="addNote" class="form-control" rows="5"></textarea>
                     </div>
+                    <div class="mb-3">
+                        <div class="form-check">
+                            <input class="form-check-input" type="checkbox" id="addStarred">
+                            <label class="form-check-label" for="addStarred">
+                                <i class="bi bi-star-fill" style="color:#ffc107;"></i> 设为重点关注
+                            </label>
+                        </div>
+                    </div>
                 </form>
             </div>
             <div class="modal-footer">
@@ -881,6 +979,14 @@ INDEX_TEMPLATE = '''
                         <label class="form-label">详情/备注</label>
                         <textarea id="editNote" class="form-control" rows="5"></textarea>
                     </div>
+                    <div class="mb-3">
+                        <div class="form-check">
+                            <input class="form-check-input" type="checkbox" id="editStarred">
+                            <label class="form-check-label" for="editStarred">
+                                <i class="bi bi-star-fill" style="color:#ffc107;"></i> 重点关注
+                            </label>
+                        </div>
+                    </div>
                 </form>
             </div>
             <div class="modal-footer">
@@ -1163,7 +1269,8 @@ INDEX_TEMPLATE = '''
 <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
 <script>
 const API_BASE = '/api';
-let currentFilter = { type: '', status: '' };
+let currentFilter = { type: '', status: '', starred: null };
+let currentSort = { sort_by: '', sort_order: '' };
 let currentPage = 1;
 const pageSize = 20;
 function debounce(fn, delay) {
@@ -1179,7 +1286,7 @@ document.addEventListener('DOMContentLoaded', async () => {
     // 确保初始状态清空
     document.getElementById('searchInput').value = '';
     document.getElementById('typeFilter').value = '';
-    currentFilter = { type: '', status: '' };
+    currentFilter = { type: '', status: '', starred: null };
     
     await loadStats(); // 先加载统计，确保总数可用
     loadItems();
@@ -1201,8 +1308,12 @@ document.addEventListener('DOMContentLoaded', async () => {
         updateEditFieldsByType(e.target.value);
     });
     
-    // 搜索
-    document.getElementById('searchInput').addEventListener('input', debounce(loadItems, 300));
+    // 搜索 - 直接绑定，不用 debounce
+    let searchTimer;
+    document.getElementById('searchInput').addEventListener('input', (e) => {
+        clearTimeout(searchTimer);
+        searchTimer = setTimeout(() => loadItems(), 300);
+    });
     
     // 类型过滤
     document.getElementById('typeFilter').addEventListener('change', (e) => {
@@ -1218,12 +1329,14 @@ document.addEventListener('DOMContentLoaded', async () => {
             a.classList.add('active');
             
             const filter = a.dataset.filter;
-            if (['text', 'link', 'column', 'todo'].includes(filter)) {
-                currentFilter = { type: filter, status: '' };
+            if (filter === 'starred') {
+                currentFilter = { type: '', status: '', starred: true };
+            } else if (['text', 'link', 'column', 'todo'].includes(filter)) {
+                currentFilter = { type: filter, status: '', starred: null };
             } else if (['pending', 'in_progress', 'completed'].includes(filter)) {
-                currentFilter = { type: 'todo', status: filter };
+                currentFilter = { type: 'todo', status: filter, starred: null };
             } else {
-                currentFilter = { type: '', status: '' };
+                currentFilter = { type: '', status: '', starred: null };
             }
             loadItems();
         });
@@ -1237,14 +1350,17 @@ async function loadItems(page = 1) {
     let url = `${API_BASE}/items?limit=${pageSize}&offset=${(page-1)*pageSize}`;
     if (currentFilter.type) url += `&type=${currentFilter.type}`;
     if (currentFilter.status) url += `&status=${currentFilter.status}`;
+    if (currentFilter.starred !== null) url += `&starred=${currentFilter.starred ? 'true' : 'false'}`;
     if (keyword) url += `&keyword=${encodeURIComponent(keyword)}`;
+    if (currentSort.sort_by) url += `&sort_by=${currentSort.sort_by}`;
+    if (currentSort.sort_order) url += `&sort_order=${currentSort.sort_order}`;
     
     const res = await fetch(url);
     const data = await res.json();
     
     if (data.success) {
         renderItems(data.data);
-        renderPagination(data.data.length, page);
+        renderPagination(data.total, page);  // 使用API返回的total
     }
 }
 
@@ -1257,16 +1373,19 @@ function renderItems(items) {
     }
     
     container.innerHTML = items.map(item => `
-        <div class="card type-${item.type} item-card" style="cursor: pointer;" onclick="showDetail(${item.id})">
+        <div class="card type-${item.type} item-card ${item.is_starred ? 'is-starred' : ''}" style="cursor: pointer;" onclick="showDetail(${item.id})">
             <div class="card-body">
                 <div class="d-flex justify-content-between align-items-start">
                     <div style="flex: 1; min-width: 0;">
                         <h6 class="card-title text-truncate mb-1 ${item.type === 'todo' && item.status === 'completed' ? 'text-muted' : ''}">
-                            ${getTypeIcon(item.type)} ${item.title || truncate(item.content || item.url, 30)}
+                            ${item.is_starred ? '<i class="bi bi-star-fill" style="color:#ffc107;"></i>' : ''} ${getTypeIcon(item.type)} ${item.title || truncate(item.content || item.url, 30)}
                             ${item.type === 'todo' && item.status === 'completed' ? ' ✓' : ''}
                             <span style="font-size:10px; opacity:0.5; margin-left:8px;">
                                 ${formatShortDate(item.created_at)}${item.updated_at && item.updated_at !== item.created_at ? '→' + formatShortDate(item.updated_at) : ''}
                             </span>
+                            ${item.content_stats && (item.content_stats.lines > 0 || item.content_stats.chars > 0) ? 
+                                `<span style="font-size:10px; opacity:0.6; margin-left:4px;" title="有效行数/总字数">[${item.content_stats.lines}行/${item.content_stats.chars}字]</span>` : ''}
+                            ${item.views > 0 ? `<span style="font-size:10px; opacity:0.5; margin-left:4px;" title="阅读次数">👁${item.views}</span>` : ''}
                         </h6>
                         <p class="card-text text-muted small mb-0 text-truncate" style="font-size:12px;">
                             ${item.url ? truncate(item.url, 50) : item.content ? truncate(item.content, 50) : item.note ? truncate(item.note, 50) : ''}
@@ -1275,6 +1394,9 @@ function renderItems(items) {
                     </div>
                     <div class="d-flex align-items-center gap-1 flex-wrap ms-2" onclick="event.stopPropagation();">
                         ${item.tags.slice(0, 2).map(t => `<span class="badge bg-secondary" style="font-size:10px;">${t}</span>`).join('')}
+                        <button class="btn btn-sm btn-outline-warning py-0 px-1 star-btn" onclick="toggleStar(${item.id})" title="${item.is_starred ? '取消重点关注' : '设为重点关注'}">
+                            <i class="bi bi-star${item.is_starred ? '-fill' : ''}" style="font-size:11px; ${item.is_starred ? 'color:#ffc107;' : ''}"></i>
+                        </button>
                         ${item.type !== 'todo' ? `<button class="btn btn-sm btn-outline-secondary py-0 px-1" onclick="showConvertModal(${item.id})" title="转为待办"><i class="bi bi-arrow-repeat" style="font-size:11px;"></i></button>` : ''}
                         <button class="btn btn-sm btn-outline-info py-0 px-1" onclick="showSendEmailModal(${item.id})" title="发送邮件"><i class="bi bi-envelope" style="font-size:11px;"></i></button>
                         <button class="btn btn-sm btn-outline-primary py-0 px-1" onclick="openEditModal(${item.id})" title="编辑"><i class="bi bi-pencil" style="font-size:11px;"></i></button>
@@ -1289,9 +1411,8 @@ function renderItems(items) {
 }
 
 // 渲染分页
-function renderPagination(itemCount, page) {
+function renderPagination(total, page) {
     const container = document.getElementById('pagination');
-    const total = parseInt(document.getElementById('statTotal').textContent);
     const totalPages = Math.ceil(total / pageSize);
     
     if (totalPages <= 1) {
@@ -1353,6 +1474,14 @@ async function refreshData() {
     loadItems(currentPage);
 }
 
+// 排序切换
+function changeSort() {
+    const sortBy = document.getElementById('sortBy').value;
+    const sortOrder = document.getElementById('sortOrder').value;
+    currentSort = { sort_by: sortBy, sort_order: sortOrder };
+    loadItems(1);  // 切换排序时回到第一页
+}
+
 // ============ 添加功能 ============
 
 // 快捷添加按钮
@@ -1397,7 +1526,8 @@ async function addItem() {
         priority: type === 'todo' ? document.getElementById('addPriority').value : null,
         due_date: type === 'todo' ? document.getElementById('addDueDate').value : null,
         note: document.getElementById('addNote').value,
-        tags: document.getElementById('addTags').value.split(',').map(t => t.trim()).filter(t => t)
+        tags: document.getElementById('addTags').value.split(',').map(t => t.trim()).filter(t => t),
+        is_starred: document.getElementById('addStarred').checked
     };
     
     const res = await fetch(`${API_BASE}/items`, {
@@ -1520,6 +1650,10 @@ let currentDetailId = null;
 // 显示详情
 async function showDetail(id) {
     currentDetailId = id;
+    
+    // 增加阅读数
+    await fetch(`${API_BASE}/items/${id}/view`, { method: 'POST' });
+    
     const res = await fetch(`${API_BASE}/items/${id}`);
     const data = await res.json();
     
@@ -1535,6 +1669,19 @@ async function showDetail(id) {
     
     let html = `<div class="mb-3"><strong>类型:</strong> ${getTypeLabel(item.type)}</div>`;
     
+    // 显示阅读数
+    html += `<div class="mb-3"><strong>阅读:</strong> <span class="badge bg-secondary">👁 ${item.views || 0} 次</span></div>`;
+    
+    // 显示重点关注状态
+    if (item.is_starred) {
+        html += `<div class="mb-3"><strong>状态:</strong> <span class="badge bg-warning text-dark"><i class="bi bi-star-fill"></i> 重点关注</span></div>`;
+    }
+    
+    // 显示内容统计
+    if (item.content_stats && (item.content_stats.lines > 0 || item.content_stats.chars > 0)) {
+        html += `<div class="mb-3"><strong>统计:</strong> <span class="badge bg-info">${item.content_stats.lines} 有效行 / ${item.content_stats.chars} 字</span></div>`;
+    }
+    
     if (item.url) {
         html += `<div class="mb-3"><strong>URL:</strong> <a href="${item.url}" target="_blank">${item.url}</a></div>`;
     }
@@ -1640,6 +1787,9 @@ async function openEditModal(id) {
         }
     }
     
+    // 设置重点关注状态
+    document.getElementById('editStarred').checked = item.is_starred === 1;
+    
     new bootstrap.Modal(document.getElementById('editModal')).show();
 }
 
@@ -1666,17 +1816,34 @@ async function saveEdit() {
         priority: type === 'todo' ? document.getElementById('editPriority').value : null,
         due_date: type === 'todo' ? document.getElementById('editDueDate').value : null,
         note: document.getElementById('editNote').value,
-        tags: document.getElementById('editTags').value.split(',').map(t => t.trim()).filter(t => t)
+        tags: document.getElementById('editTags').value.split(',').map(t => t.trim()).filter(t => t),
+        is_starred: document.getElementById('editStarred').checked ? 1 : 0
     };
     
-    const res = await fetch(`${API_BASE}/items/${id}`, {
-        method: 'PUT',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify(data)
-    });
-    
+    try {
+        const res = await fetch(`${API_BASE}/items/${id}`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify(data)
+        });
+        
+        const result = await res.json();
+        
+        if (res.ok && result.success) {
+            bootstrap.Modal.getInstance(document.getElementById('editModal')).hide();
+            refreshData();
+        } else {
+            alert('保存失败: ' + (result.error || '未知错误'));
+        }
+    } catch (e) {
+        alert('保存失败: ' + e.message);
+    }
+}
+
+// 切换重点关注状态
+async function toggleStar(id) {
+    const res = await fetch(`${API_BASE}/items/${id}/star`, { method: 'POST' });
     if (res.ok) {
-        bootstrap.Modal.getInstance(document.getElementById('editModal')).hide();
         refreshData();
     }
 }

xian_favor/db.py

@@ -59,6 +59,8 @@ class Database:
                     priority TEXT DEFAULT 'medium',
                     due_date TEXT,
                     note TEXT,
+                    is_starred INTEGER DEFAULT 0,
+                    views INTEGER DEFAULT 0,
                     created_at TEXT NOT NULL,
                     updated_at TEXT NOT NULL
                 )
@@ -114,6 +116,21 @@ class Database:
             cursor.execute("CREATE INDEX IF NOT EXISTS idx_item_tags_item ON item_tags(item_id)")
             cursor.execute("CREATE INDEX IF NOT EXISTS idx_item_tags_tag ON item_tags(tag_id)")
             
+            # 检查并添加 is_starred 字段（兼容旧数据库）
+            try:
+                cursor.execute("SELECT is_starred FROM items LIMIT 1")
+            except sqlite3.OperationalError:
+                cursor.execute("ALTER TABLE items ADD COLUMN is_starred INTEGER DEFAULT 0")
+            
+            # 创建 is_starred 索引（字段添加后再创建）
+            cursor.execute("CREATE INDEX IF NOT EXISTS idx_items_starred ON items(is_starred)")
+            
+            # 检查并添加 views 字段（兼容旧数据库）
+            try:
+                cursor.execute("SELECT views FROM items LIMIT 1")
+            except sqlite3.OperationalError:
+                cursor.execute("ALTER TABLE items ADD COLUMN views INTEGER DEFAULT 0")
+            
             conn.commit()
     
     # ============ Item 操作 ============
@@ -121,7 +138,7 @@ class Database:
     def create_item(self, type: str = "text", title: str = None, content: str = None,
                     url: str = None, source: str = None, status: str = "pending",
                     priority: str = "medium", due_date: str = None, note: str = None,
-                    tags: List[str] = None) -> int:
+                    tags: List[str] = None, is_starred: bool = False) -> int:
         """创建新条目"""
         self._ensure_init()
         now = datetime.now().isoformat()
@@ -135,9 +152,9 @@ class Database:
         with self.get_conn() as conn:
             cursor = conn.cursor()
             cursor.execute("""
-                INSERT INTO items (type, title, content, url, source, status, priority, due_date, note, created_at, updated_at)
-                VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
-            """, (type, title, content, url, source, status, priority, due_date, note, now, now))
+                INSERT INTO items (type, title, content, url, source, status, priority, due_date, note, is_starred, created_at, updated_at)
+                VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+            """, (type, title, content, url, source, status, priority, due_date, note, 1 if is_starred else 0, now, now))
             item_id = cursor.lastrowid
             
             # 添加标签
@@ -161,8 +178,13 @@ class Database:
             return item
     
     def list_items(self, type: str = None, status: str = None, tag: str = None,
-                   keyword: str = None, limit: int = 50, offset: int = 0) -> List[Dict[str, Any]]:
-        """列出条目"""
+                   keyword: str = None, starred: bool = None, sort_by: str = None,
+                   sort_order: str = None, limit: int = 50, offset: int = 0) -> List[Dict[str, Any]]:
+        """列出条目
+        
+        sort_by: created_at, updated_at
+        sort_order: desc, asc
+        """
         with self.get_conn() as conn:
             cursor = conn.cursor()
             
@@ -184,6 +206,10 @@ class Database:
                 conditions.append("i.status = ?")
                 params.append(status)
             
+            if starred is not None:
+                conditions.append("i.is_starred = ?")
+                params.append(1 if starred else 0)
+            
             if keyword:
                 conditions.append("(i.title LIKE ? OR i.content LIKE ? OR i.note LIKE ?)")
                 keyword_pattern = f"%{keyword}%"
@@ -192,7 +218,31 @@ class Database:
             if conditions:
                 query += " WHERE " + " AND ".join(conditions)
             
-            query += " ORDER BY i.created_at DESC LIMIT ? OFFSET ?"
+            # 排序逻辑
+            if sort_by == 'updated_at':
+                order_field = 'i.updated_at'
+            elif sort_by == 'created_at':
+                order_field = 'i.created_at'
+            else:
+                # 默认：重点关注优先 + 创建时间降序
+                order_field = 'i.created_at'
+            
+            order_dir = 'DESC' if (sort_order == 'asc' or sort_order is None) else 'ASC'
+            # 这里反转逻辑：用户选择"降序"时用DESC，选择"升序"时用ASC
+            
+            if sort_order == 'asc':
+                order_dir = 'ASC'
+            elif sort_order == 'desc':
+                order_dir = 'DESC'
+            else:
+                order_dir = 'DESC'  # 默认降序
+            
+            # 如果有指定排序字段，按该字段排序；否则默认重点关注优先
+            if sort_by:
+                query += f" ORDER BY {order_field} {order_dir} LIMIT ? OFFSET ?"
+            else:
+                # 默认：重点关注优先，然后创建时间降序
+                query += f" ORDER BY i.is_starred DESC, i.created_at DESC LIMIT ? OFFSET ?"
             params.extend([limit, offset])
             
             cursor.execute(query, params)
@@ -204,11 +254,51 @@ class Database:
             
             return items
     
+    def count_items(self, type: str = None, status: str = None, tag: str = None,
+                    keyword: str = None, starred: bool = None) -> int:
+        """计算符合条件的条目总数"""
+        with self.get_conn() as conn:
+            cursor = conn.cursor()
+            
+            query = "SELECT COUNT(DISTINCT i.id) as count FROM items i"
+            params = []
+            conditions = []
+            
+            # 标签过滤需要JOIN
+            if tag:
+                query += " JOIN item_tags it ON i.id = it.item_id JOIN tags t ON it.tag_id = t.id"
+                conditions.append("t.name = ?")
+                params.append(tag)
+            
+            if type:
+                conditions.append("i.type = ?")
+                params.append(type)
+            
+            if status:
+                conditions.append("i.status = ?")
+                params.append(status)
+            
+            if starred is not None:
+                conditions.append("i.is_starred = ?")
+                params.append(1 if starred else 0)
+            
+            if keyword:
+                conditions.append("(i.title LIKE ? OR i.content LIKE ? OR i.note LIKE ?)")
+                keyword_pattern = f"%{keyword}%"
+                params.extend([keyword_pattern, keyword_pattern, keyword_pattern])
+            
+            if conditions:
+                query += " WHERE " + " AND ".join(conditions)
+            
+            cursor.execute(query, params)
+            return cursor.fetchone()['count']
+    
     def update_item(self, item_id: int, **kwargs) -> bool:
         """更新条目"""
-        allowed_fields = ['type', 'title', 'content', 'url', 'source', 'status', 'priority', 'due_date', 'note']
+        allowed_fields = ['type', 'title', 'content', 'url', 'source', 'status', 'priority', 'due_date', 'note', 'is_starred']
         update_fields = {k: v for k, v in kwargs.items() if k in allowed_fields}
         
+        # 只有 tags 变化也算有效更新
         if not update_fields and 'tags' not in kwargs:
             return False
         
@@ -217,6 +307,11 @@ class Database:
         with self.get_conn() as conn:
             cursor = conn.cursor()
             
+            # 检查条目是否存在
+            cursor.execute("SELECT id FROM items WHERE id = ?", (item_id,))
+            if not cursor.fetchone():
+                return False
+            
             if update_fields:
                 set_clause = ", ".join(f"{k} = ?" for k in update_fields.keys())
                 set_clause += ", updated_at = ?"
@@ -231,7 +326,7 @@ class Database:
                     self._add_tags_to_item(conn, item_id, kwargs['tags'])
             
             conn.commit()
-            return cursor.rowcount > 0
+            return True
     
     def delete_item(self, item_id: int) -> bool:
         """删除条目"""
@@ -241,6 +336,39 @@ class Database:
             conn.commit()
             return cursor.rowcount > 0
     
+    def toggle_star(self, item_id: int) -> bool:
+        """切换重点关注状态"""
+        with self.get_conn() as conn:
+            cursor = conn.cursor()
+            # 先获取当前状态
+            cursor.execute("SELECT is_starred FROM items WHERE id = ?", (item_id,))
+            row = cursor.fetchone()
+            if not row:
+                return False
+            
+            new_status = 0 if row['is_starred'] else 1
+            now = datetime.now().isoformat()
+            cursor.execute("UPDATE items SET is_starred = ?, updated_at = ? WHERE id = ?", (new_status, now, item_id))
+            conn.commit()
+            return True
+    
+    def set_star(self, item_id: int, starred: bool = True) -> bool:
+        """设置重点关注状态"""
+        with self.get_conn() as conn:
+            cursor = conn.cursor()
+            now = datetime.now().isoformat()
+            cursor.execute("UPDATE items SET is_starred = ?, updated_at = ? WHERE id = ?", (1 if starred else 0, now, item_id))
+            conn.commit()
+            return cursor.rowcount > 0
+    
+    def increment_views(self, item_id: int) -> bool:
+        """增加阅读数"""
+        with self.get_conn() as conn:
+            cursor = conn.cursor()
+            cursor.execute("UPDATE items SET views = views + 1 WHERE id = ?", (item_id,))
+            conn.commit()
+            return cursor.rowcount > 0
+    
     # ============ Tag 操作 ============
     
     def create_tag(self, name: str, color: str = "#3498db") -> int: