diff --git a/xian_favor/api.py b/xian_favor/api.py
index e3959d9..189d07f 100644
--- a/xian_favor/api.py
+++ b/xian_favor/api.py
@@ -1022,13 +1022,13 @@ INDEX_TEMPLATE = '''
                 <div class="mb-3">
                     <label class="form-label fw-bold">转换方式</label>
                     <div class="form-check">
-                        <input class="form-check-input" type="radio" name="convertMode" id="modeConvert" value="convert" checked>
+                        <input class="form-check-input" type="radio" name="convertMode" id="modeConvert" value="convert">
                         <label class="form-check-label" for="modeConvert">
                             <strong>直接转换</strong> - 原收藏变为待办，数据合并
                         </label>
                     </div>
                     <div class="form-check">
-                        <input class="form-check-input" type="radio" name="convertMode" id="modeCopy" value="copy">
+                        <input class="form-check-input" type="radio" name="convertMode" id="modeCopy" value="copy" checked>
                         <label class="form-check-label" for="modeCopy">
                             <strong>复制创建</strong> - 保留原收藏，新建待办任务
                         </label>
@@ -1067,7 +1067,7 @@ INDEX_TEMPLATE = '''
                 
                 <div class="mb-3">
                     <label class="form-label text-muted">内容预览（转换后会合并到待办备注）</label>
-                    <div id="convertPreview" class="border rounded p-2 bg-light" style="max-height: 150px; overflow-y: auto;">
+                    <div id="convertPreview" class="border rounded p-2 bg-light" style="max-height: 150px; overflow-y: auto; white-space: pre-wrap; word-break: break-all;">
                         <!-- 动态填充 -->
                     </div>
                 </div>
@@ -1335,8 +1335,8 @@ async function showConvertModal(itemId) {
     // 设置默认标题
     document.getElementById('convertTitle').value = convertItemData.title || '';
     
-    // 重置选项
-    document.getElementById('modeConvert').checked = true;
+    // 重置选项（默认复制创建）
+    document.getElementById('modeCopy').checked = true;
     document.getElementById('convertStatus').value = 'pending';
     document.getElementById('convertPriority').value = 'medium';
     document.getElementById('convertDueDate').value = '';