fix: 分页正确显示当前筛选的总数

- API返回 total 字段（筛选后的实际总数）
- 新增 count_items 函数计算筛选条件下的总数
- 分页使用API返回的total而不是全局统计
- 解决筛选后分页显示不正确的问题

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

@@ -25,7 +25,16 @@ def list_items():
         limit=int(request.args.get('limit', 50)),
         offset=int(request.args.get('offset', 0))
     )
-    return jsonify({'success': True, 'data': items})
+    
+    # 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')
+    )
+    
+    return jsonify({'success': True, 'data': items, 'total': total})
 
 
 @app.route('/api/items', methods=['POST'])
@@ -1201,8 +1210,12 @@ 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) => {
@@ -1244,7 +1257,7 @@ async function loadItems(page = 1) {
     
     if (data.success) {
         renderItems(data.data);
-        renderPagination(data.data.length, page);
+        renderPagination(data.total, page);  // 使用API返回的total
     }
 }
 
@@ -1289,9 +1302,8 @@ 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) {

xian_favor/db.py

@@ -204,6 +204,41 @@ class Database:
             
             return items
     
+    def count_items(self, type: str = None, status: str = None, tag: str = None,
+                    keyword: str = 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 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']