style(frontend): 去掉刷新提示条、隐藏弹窗滚动条并前置时区列

- 刷新按钮保持「刷新」文案，不再出现「同步中...」和顶部进度条，仅禁用防重复点击
- 任务编辑器 / 目录选择弹窗隐藏滚动条，滚轮与触控板仍可滚动
- 任务表「时区」列移到「调度周期」前面

frontend/src/App.css

@@ -62,44 +62,9 @@
 /* ---------- 任务列表 ---------- */
 
 .task-card {
-  position: relative;
   overflow: hidden;
 }
 
-/* 手动刷新时的顶部进度条：不改变表格布局，也避免旧数据看起来像「残影」 */
-.refresh-bar {
-  position: absolute;
-  z-index: 2;
-  top: 0;
-  right: 0;
-  left: 0;
-  height: 2px;
-  overflow: hidden;
-  background-color: var(--su-color-primary-soft);
-  pointer-events: none;
-}
-
-.refresh-bar::after {
-  content: '';
-  position: absolute;
-  top: 0;
-  bottom: 0;
-  left: 0;
-  width: 40%;
-  background-color: var(--su-color-primary);
-  animation: refresh-slide 1.1s ease-in-out infinite;
-}
-
-@keyframes refresh-slide {
-  from {
-    transform: translateX(-100%);
-  }
-
-  to {
-    transform: translateX(250%);
-  }
-}
-
 /* 表格嵌在卡片里：去掉自身描边与圆角，避免「卡片套卡片」 */
 .task-table {
   border: 0;
@@ -134,12 +99,6 @@
   min-width: 140px;
 }
 
-/* 「刷新」和「同步中...」字数不同，固定宽度避免刷新时工具栏左右跳动 */
-.refresh-button {
-  min-width: 68px;
-  justify-content: center;
-}
-
 .task-name-cell {
   display: flex;
   min-width: 0;
@@ -246,6 +205,21 @@
   overflow-y: auto;
 }
 
+/* 弹窗内容仍可用滚轮 / 触控板滚动，但不显示右侧滚动条 */
+.task-editor-modal > div,
+.directory-picker-modal > div,
+.directory-picker-body {
+  scrollbar-width: none;
+  -ms-overflow-style: none;
+}
+
+.task-editor-modal > div::-webkit-scrollbar,
+.directory-picker-modal > div::-webkit-scrollbar,
+.directory-picker-body::-webkit-scrollbar {
+  width: 0;
+  height: 0;
+}
+
 .task-editor-modal > header,
 .task-editor-modal > footer {
   flex: none;

frontend/src/pages/TaskDashboard.tsx

@@ -69,8 +69,8 @@ const ACTION_TYPE_OPTIONS = [
 
 const TABLE_COLUMNS: TableColumn[] = [
   { key: 'name', title: '名称 / 任务标识', width: 250 },
-  { key: 'schedule', title: '调度周期', width: 210 },
   { key: 'timezone', title: '时区', width: 120 },
+  { key: 'schedule', title: '调度周期', width: 210 },
   { key: 'status', title: '状态', width: 110 },
   { key: 'timeout', title: '超时', width: 90 },
   { key: 'actions', title: '操作', align: 'right', width: 260 },
@@ -378,9 +378,6 @@ export function TaskDashboard() {
       </section>
 
       <Card padding="none" className="task-card">
-        {refreshing ? (
-          <div className="refresh-bar" role="progressbar" aria-label="正在刷新" />
-        ) : null}
         <div className="toolbar">
           <SearchField
             className="toolbar-search"
@@ -420,11 +417,10 @@ export function TaskDashboard() {
               </TextButton>
             ) : null}
             <TextButton
-              className="refresh-button"
               onClick={() => void refreshAll()}
               disabled={refreshing}
             >
-              {refreshing ? '同步中...' : '刷新'}
+              刷新
             </TextButton>
           </div>
         </div>