feat(v4.2.1): 文件夹按钮样式优化+新增数据到文件夹功能

- hover文件夹时按钮悬浮在右侧，高度一致
- 新增数据按钮（绿色+）直接添加数据到该文件夹

xian_favor/api.py

@@ -1087,18 +1087,38 @@ INDEX_TEMPLATE = '''
         .folder-list a i { margin-right: 5px; }
         .folder-list .folder-item {
             display: flex;
+            align-items: center;
             padding: 6px 10px;
+            position: relative;
         }
         .folder-list .folder-item a {
-            padding: 0 10px;
+            padding: 6px 10px;
             flex-grow: 1;
+            display: flex;
+            align-items: center;
         }
         .folder-list .folder-actions {
+            position: absolute;
+            right: 10px;
             display: none;
+            gap: 4px;
+            background: #343a40;
+            padding: 4px 8px;
+            border-radius: 4px;
         }
         .folder-list .folder-item:hover .folder-actions {
             display: flex;
-            gap: 2px;
+        }
+        .folder-list .folder-actions .btn {
+            padding: 2px 6px;
+            font-size: 12px;
+            line-height: 1;
+        }
+        .folder-list .folder-item:hover {
+            background: #495057;
+        }
+        .folder-list .folder-item:hover a {
+            color: #fff;
         }
         .folder-action { 
             font-size: 12px; 
@@ -2664,6 +2684,9 @@ function showAddModal(type) {
     // 设置类型
     document.getElementById('addType').value = type;
     
+    // 重置文件夹ID（从顶部按钮添加时不指定文件夹）
+    currentAddFolderId = null;
+    
     // 只有不是编辑草稿时才重置
     // currentDraftId 在 editDraft 中已设置，不要覆盖
     
@@ -2720,7 +2743,8 @@ async function addItem() {
         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),
-        is_starred: document.getElementById('addStarred').checked
+        is_starred: document.getElementById('addStarred').checked,
+        folder_id: currentAddFolderId  // 如果从文件夹添加，带上文件夹ID
     };
     
     const res = await fetch(`${API_BASE}/items`, {
@@ -2741,6 +2765,7 @@ async function addItem() {
         
         stopAutoSave();
         hideDraftIndicator();
+        currentAddFolderId = null;  // 重置文件夹ID
         refreshData();
     }
 }
@@ -4194,10 +4219,13 @@ function renderFolderList(type) {
                 <i class="bi bi-folder"></i> ${f.name} <small class="text-muted">(${f.item_count || 0})</small>
             </a>
             <div class="folder-actions">
-                <button class="btn btn-sm btn-outline-secondary py-0 px-1" onclick="event.stopPropagation(); showEditFolderModal(${f.id}, '${f.name}'); return false;" title="重命名">
+                <button class="btn btn-outline-success" onclick="event.stopPropagation(); showAddToFolderModal('${type}', ${f.id}); return false;" title="新增数据到此文件夹">
+                    <i class="bi bi-plus"></i>
+                </button>
+                <button class="btn btn-outline-secondary" onclick="event.stopPropagation(); showEditFolderModal(${f.id}, '${f.name}'); return false;" title="重命名">
                     <i class="bi bi-pencil"></i>
                 </button>
-                <button class="btn btn-sm btn-outline-danger py-0 px-1" onclick="event.stopPropagation(); deleteFolderConfirm(${f.id}, '${f.name}'); return false;" title="删除">
+                <button class="btn btn-outline-danger" onclick="event.stopPropagation(); deleteFolderConfirm(${f.id}, '${f.name}'); return false;" title="删除">
                     <i class="bi bi-trash"></i>
                 </button>
             </div>
@@ -4327,6 +4355,55 @@ async function deleteFolderConfirm(folderId, folderName) {
     }
 }
 
+// 显示新增数据到文件夹的模态框
+function showAddToFolderModal(type, folderId) {
+    // 离线检查
+    if (!checkOnlineBeforeAction('添加数据')) return;
+    
+    // 设置类型
+    document.getElementById('addType').value = type;
+    document.getElementById('editFolderId').value = '';  // 重置编辑ID
+    
+    // 设置弹窗标题和图标
+    const typeInfo = {
+        text: { icon: '📝', title: '添加文本' },
+        link: { icon: '🔗', title: '添加链接' },
+        column: { icon: '📰', title: '添加专栏' },
+        todo: { icon: '✅', title: '添加待办' }
+    };
+    
+    document.getElementById('addModalIcon').textContent = typeInfo[type].icon;
+    document.getElementById('addModalTitle').textContent = typeInfo[type].title;
+    
+    // 显示/隐藏对应字段
+    document.getElementById('contentGroup').style.display = type === 'text' ? 'block' : 'none';
+    document.getElementById('urlGroup').style.display = ['link', 'column'].includes(type) ? 'block' : 'none';
+    document.getElementById('sourceGroup').style.display = type === 'column' ? 'block' : 'none';
+    document.getElementById('todoFields').style.display = type === 'todo' ? 'block' : 'none';
+    
+    // 清空表单
+    document.getElementById('addForm').reset();
+    hideDraftIndicator();
+    
+    // 设置默认文件夹（隐藏字段，需要在提交时带上）
+    currentAddFolderId = folderId;
+    
+    // 打开弹窗
+    new bootstrap.Modal(document.getElementById('addModal')).show();
+    
+    // 启动自动保存
+    startAutoSave();
+    
+    // 弹框关闭时停止自动保存并重置文件夹ID
+    document.getElementById('addModal').addEventListener('hidden.bs.modal', () => {
+        stopAutoSave();
+        currentAddFolderId = null;
+    }, { once: true });
+}
+
+// 当前新增时的文件夹ID
+let currentAddFolderId = null;
+
 function filterByFolder(type, folderId) {
     // 更新侧边栏选中状态
     document.querySelectorAll('.sidebar a').forEach(a => a.classList.remove('active'));