feat: 标签管理添加编辑功能，支持修改标签名称

xian_favor/api.py

@@ -132,6 +132,23 @@ def create_tag():
         return jsonify({'success': False, 'error': str(e)}), 500
 
 
+@app.route('/api/tags/<int:tag_id>', methods=['PUT'])
+def update_tag(tag_id):
+    """更新标签"""
+    data = request.get_json()
+    name = data.get('name', '').strip()
+    
+    if not name:
+        return jsonify({'success': False, 'error': '标签名不能为空'}), 400
+    
+    try:
+        if db.update_tag(tag_id, name):
+            return jsonify({'success': True, 'data': {'id': tag_id, 'name': name}})
+        return jsonify({'success': False, 'error': '标签不存在或名称已存在'}), 404
+    except Exception as e:
+        return jsonify({'success': False, 'error': str(e)}), 500
+
+
 @app.route('/api/tags/<int:tag_id>', methods=['DELETE'])
 def delete_tag(tag_id):
     """删除标签"""
@@ -989,14 +1006,28 @@ async function loadTagManagerList() {
     }
     
     container.innerHTML = tags.map(tag => `
-        <div class="d-flex justify-content-between align-items-center p-2 border-bottom">
-            <div>
+        <div class="d-flex justify-content-between align-items-center p-2 border-bottom" id="tag-row-${tag.id}">
+            <div id="tag-display-${tag.id}">
                 <span class="badge bg-secondary">${tag.name}</span>
                 <span class="text-muted small ms-2">${tag.item_count || 0} 个条目</span>
             </div>
-            <button class="btn btn-sm btn-outline-danger" onclick="deleteTagManager(${tag.id}, '${tag.name}')">
-                <i class="bi bi-trash"></i>
-            </button>
+            <div id="tag-edit-${tag.id}" style="display:none;">
+                <input type="text" class="form-control form-control-sm" id="edit-tag-name-${tag.id}" value="${tag.name}" style="width:150px;">
+            </div>
+            <div class="btn-group btn-group-sm">
+                <button class="btn btn-outline-primary" id="tag-edit-btn-${tag.id}" onclick="showEditTag(${tag.id})" title="编辑">
+                    <i class="bi bi-pencil"></i>
+                </button>
+                <button class="btn btn-outline-success" id="tag-save-btn-${tag.id}" style="display:none;" onclick="saveEditTag(${tag.id})" title="保存">
+                    <i class="bi bi-check"></i>
+                </button>
+                <button class="btn btn-outline-secondary" id="tag-cancel-btn-${tag.id}" style="display:none;" onclick="cancelEditTag(${tag.id}, '${tag.name}')" title="取消">
+                    <i class="bi bi-x"></i>
+                </button>
+                <button class="btn btn-outline-danger" onclick="deleteTagManager(${tag.id}, '${tag.name}')" title="删除">
+                    <i class="bi bi-trash"></i>
+                </button>
+            </div>
         </div>
     `).join('');
 }
@@ -1027,6 +1058,45 @@ async function deleteTagManager(id, name) {
     loadItems();
 }
 
+// 编辑标签
+function showEditTag(id) {
+    document.getElementById(`tag-display-${id}`).style.display = 'none';
+    document.getElementById(`tag-edit-${id}`).style.display = 'block';
+    document.getElementById(`tag-edit-btn-${id}`).style.display = 'none';
+    document.getElementById(`tag-save-btn-${id}`).style.display = 'inline-block';
+    document.getElementById(`tag-cancel-btn-${id}`).style.display = 'inline-block';
+    document.getElementById(`edit-tag-name-${id}`).focus();
+}
+
+function cancelEditTag(id, oldName) {
+    document.getElementById(`edit-tag-name-${id}`).value = oldName;
+    document.getElementById(`tag-display-${id}`).style.display = 'block';
+    document.getElementById(`tag-edit-${id}`).style.display = 'none';
+    document.getElementById(`tag-edit-btn-${id}`).style.display = 'inline-block';
+    document.getElementById(`tag-save-btn-${id}`).style.display = 'none';
+    document.getElementById(`tag-cancel-btn-${id}`).style.display = 'none';
+}
+
+async function saveEditTag(id) {
+    const newName = document.getElementById(`edit-tag-name-${id}`).value.trim();
+    if (!newName) return;
+    
+    const res = await fetch(`${API_BASE}/tags/${id}`, {
+        method: 'PUT',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ name: newName })
+    });
+    
+    if (res.ok) {
+        loadTagManagerList();
+        loadTags();
+        loadItems();
+    } else {
+        const data = await res.json();
+        alert(data.error || '更新失败');
+    }
+}
+
 // 导出数据
 async function exportData() {
     const res = await fetch(`${API_BASE}/items?limit=1000`);

xian_favor/db.py

@@ -244,6 +244,18 @@ class Database:
             """)
             return [dict(row) for row in cursor.fetchall()]
     
+    def update_tag(self, tag_id: int, name: str) -> bool:
+        """更新标签名称"""
+        with self.get_conn() as conn:
+            cursor = conn.cursor()
+            # 检查名称是否已存在（排除自己）
+            cursor.execute("SELECT id FROM tags WHERE name = ? AND id != ?", (name, tag_id))
+            if cursor.fetchone():
+                return False  # 名称已存在
+            cursor.execute("UPDATE tags SET name = ? WHERE id = ?", (name, tag_id))
+            conn.commit()
+            return cursor.rowcount > 0
+    
     def delete_tag(self, tag_id: int = None, name: str = None) -> bool:
         """删除标签"""
         with self.get_conn() as conn: