v2.1: 标签系统增删改、分类编辑功能

app.py

@@ -390,6 +390,30 @@ def create_tag():
     return jsonify(dict(tag))
 
 
+@app.route('/api/tags/<tag_id>', methods=['PUT'])
+def update_tag(tag_id):
+    data = request.get_json(force=True)
+    conn = get_db()
+    tag = conn.execute('SELECT * FROM tags WHERE id=?', (tag_id,)).fetchone()
+    if not tag:
+        conn.close()
+        return jsonify({'error': '标签不存在'}), 404
+    name = data.get('name', '').strip()
+    if not name:
+        conn.close()
+        return jsonify({'error': '标签名不能为空'}), 400
+    # 检查重名（排除自身）
+    existing = conn.execute('SELECT id FROM tags WHERE name=? AND id!=?', (name, tag_id)).fetchone()
+    if existing:
+        conn.close()
+        return jsonify({'error': '标签名已存在'}), 400
+    conn.execute('UPDATE tags SET name=? WHERE id=?', (name, tag_id))
+    conn.commit()
+    tag = conn.execute('SELECT * FROM tags WHERE id=?', (tag_id,)).fetchone()
+    conn.close()
+    return jsonify(dict(tag))
+
+
 @app.route('/api/tags/<tag_id>', methods=['DELETE'])
 def delete_tag(tag_id):
     conn = get_db()