feat: 任务列表去掉状态列, 新增更新时间列

- 移除「已启用/未启用」状态列及全部 status-dot/task-status 样式
- 新增「更新时间」列, 显示任务最近修改时间(History 图标)
- 表格栅格 5 列重排, 清理 1250px 媒体查询对应覆盖

src/renderer/src/pages/TasksPage.tsx

@@ -5,6 +5,7 @@ import {
   CircleAlert,
   CirclePlay,
   Clock3,
+  History,
   ListChecks,
   Pencil,
   Plus,
@@ -127,9 +128,9 @@ export function TasksPage({ flows, onCreate, onCreateExamples, onOpenEditor, onR
 
           <div className="task-table-head" aria-hidden="true">
             <span>任务</span>
-            <span>状态</span>
             <span>触发方式</span>
             <span>最近运行</span>
+            <span>更新时间</span>
             <span />
           </div>
 
@@ -149,14 +150,15 @@ export function TasksPage({ flows, onCreate, onCreateExamples, onOpenEditor, onR
                   <span className="task-icon"><ListChecks className="icon" /></span>
                   <span className="task-copy"><strong>{flow.name}</strong><small>{flow.nodeCount} 个节点</small></span>
                 </div>
-                <span className={`task-status ${flow.enabled === false ? "paused" : "enabled"}`}>
-                  <span className="status-dot" />{flow.enabled === false ? "未启用" : "已启用"}
-                </span>
                 <span className="task-trigger"><CalendarClock className="icon" />{flow.triggerLabel || "手动运行"}</span>
                 <span className={`task-updated run-result ${flow.lastRunStatus || "never"}`} title={flow.lastRunError || ""}>
                   <Clock3 className="icon" />
                   <span>{flow.lastRunAt ? formatTime(flow.lastRunAt) : "尚未运行"}{flow.lastRunDurationMs !== undefined ? ` · ${formatDuration(flow.lastRunDurationMs)}` : ""}</span>
                 </span>
+                <span className="task-updated" title={`最近修改于 ${formatTime(flow.updatedAt)}`}>
+                  <History className="icon" />
+                  <span>{formatTime(flow.updatedAt)}</span>
+                </span>
                 <span className="task-row-actions">
                   <button type="button" className="icon-btn" title="运行任务" onClick={(event) => { event.stopPropagation(); onRun(flow.id); }}>
                     <CirclePlay className="icon" />

src/renderer/src/styles/app.css

@@ -538,14 +538,6 @@ textarea:focus-visible {
   text-overflow: ellipsis;
 }
 
-.status-dot {
-  width: 7px;
-  height: 7px;
-  border-radius: 50%;
-  background: var(--success);
-  box-shadow: 0 0 0 3px rgba(7, 148, 85, 0.08);
-}
-
 .palette-more {
   padding: 8px 14px 12px;
   display: flex;
@@ -2818,7 +2810,7 @@ textarea:focus-visible {
 .task-table-head,
 .task-row {
   display: grid;
-  grid-template-columns: minmax(190px, 1.35fr) 90px minmax(100px, 0.8fr) minmax(100px, 0.85fr) 106px;
+  grid-template-columns: minmax(190px, 1.35fr) minmax(100px, 0.8fr) minmax(110px, 0.85fr) minmax(100px, 0.75fr) 106px;
   gap: 10px;
   align-items: center;
 }
@@ -2859,8 +2851,7 @@ textarea:focus-visible {
 
 .task-name-cell,
 .task-trigger,
-.task-updated,
-.task-status {
+.task-updated {
   display: flex;
   align-items: center;
   min-width: 0;
@@ -2929,33 +2920,6 @@ textarea:focus-visible {
   color: var(--warn-deep);
 }
 
-.task-status {
-  font-size: 10.5px;
-  white-space: nowrap;
-}
-
-.status-dot {
-  width: 7px;
-  height: 7px;
-  flex: none;
-  border-radius: 50%;
-  background: var(--success);
-  box-shadow: 0 0 0 3px rgba(7, 148, 85, 0.08);
-}
-
-.task-status.paused .status-dot {
-  background: var(--faint);
-  box-shadow: 0 0 0 3px rgba(161, 172, 186, 0.12);
-}
-
-.task-status.paused {
-  color: var(--muted);
-}
-
-.task-status.enabled {
-  color: var(--success-deep);
-}
-
 .task-row-actions {
   display: flex;
   justify-content: flex-end;
@@ -3206,7 +3170,7 @@ textarea:focus-visible {
 @media (max-width: 1250px) {
   .task-table-head,
   .task-row {
-    grid-template-columns: minmax(170px, 1.3fr) 82px minmax(90px, 0.8fr) 96px 96px;
+    grid-template-columns: minmax(170px, 1.3fr) minmax(90px, 0.8fr) 96px 96px 96px;
   }
 }