feat: 刷新按钮移入任务列表面板头部并增加加载反馈

- 从页面标题栏移除刷新按钮，改放到任务列表搜索框右侧
- 点击时图标旋转动画，完成后 toast「任务列表已刷新」
- 刷新进行中防重复点击

src/renderer/src/App.tsx

@@ -258,7 +258,8 @@ export function App() {
             onOpenEditor={(id) => void openEditor(id)}
             onRun={(id) => void runTask(id)}
             onDelete={(id) => void deleteTask(id)}
-            onRefresh={() => void refreshFlows()}
+            onRefresh={() => refreshFlows()}
+            onToast={showToast}
           />
         )}
         {page === "editor" && <EditorPage catalog={catalog} onToast={showToast} onBack={() => { setPage("tasks"); void refreshFlows(); }} />}

src/renderer/src/pages/TasksPage.tsx

@@ -23,7 +23,8 @@ interface TasksPageProps {
   onOpenEditor: (id: string) => void;
   onRun: (id: string) => void;
   onDelete: (id: string) => void;
-  onRefresh: () => void;
+  onRefresh: () => void | Promise<void>;
+  onToast: (message: string, kind?: "ok" | "error") => void;
 }
 
 function formatTime(value: string): string {
@@ -45,9 +46,21 @@ function formatDuration(value?: number): string {
 
 const RUN_LABEL = { succeeded: "成功", failed: "失败", cancelled: "已取消", never: "未运行" } as const;
 
-export function TasksPage({ flows, onCreate, onCreateExamples, onOpenEditor, onRun, onDelete, onRefresh }: TasksPageProps) {
+export function TasksPage({ flows, onCreate, onCreateExamples, onOpenEditor, onRun, onDelete, onRefresh, onToast }: TasksPageProps) {
   const [query, setQuery] = useState("");
   const [selectedId, setSelectedId] = useState<string | null>(flows[0]?.id || null);
+  const [refreshing, setRefreshing] = useState(false);
+
+  const handleRefresh = async () => {
+    if (refreshing) return;
+    setRefreshing(true);
+    try {
+      await onRefresh();
+      onToast("任务列表已刷新", "ok");
+    } finally {
+      setRefreshing(false);
+    }
+  };
 
   useEffect(() => {
     if (!flows.length) {
@@ -76,9 +89,6 @@ export function TasksPage({ flows, onCreate, onCreateExamples, onOpenEditor, onR
           <p>选择一个任务开始运行或编辑流程；组件库只在进入编辑时参与搭建。</p>
         </div>
         <div className="page-heading-actions">
-          <button type="button" className="icon-btn" title="刷新任务列表" onClick={onRefresh}>
-            <RefreshCw className="icon" />
-          </button>
           <button type="button" className="btn" onClick={onCreateExamples}>
             <PackagePlus className="icon" /> 安装示例任务
           </button>
@@ -106,6 +116,15 @@ export function TasksPage({ flows, onCreate, onCreateExamples, onOpenEditor, onR
               <Search className="icon" />
               <input value={query} onChange={(event) => setQuery(event.target.value)} placeholder="搜索任务" aria-label="搜索任务" />
             </label>
+            <button
+              type="button"
+              className={`icon-btn refresh-btn${refreshing ? " refreshing" : ""}`}
+              title="刷新任务列表"
+              aria-label="刷新任务列表"
+              onClick={() => void handleRefresh()}
+            >
+              <RefreshCw className="icon" />
+            </button>
           </div>
 
           <div className="task-table-head" aria-hidden="true">

src/renderer/src/styles/app.css

@@ -3294,3 +3294,27 @@ textarea:focus-visible {
   overflow: hidden;
   text-overflow: ellipsis;
 }
+
+/* 任务列表头部刷新按钮 */
+.task-list-head {
+  gap: 10px;
+}
+
+.task-list-head .task-search {
+  margin-left: auto;
+}
+
+.icon-btn.refresh-btn {
+  width: 30px;
+  height: 30px;
+  flex: none;
+  color: var(--muted, #5b6474);
+}
+
+.icon-btn.refresh-btn:hover {
+  color: var(--accent, #2563eb);
+}
+
+.icon-btn.refresh-btn.refreshing .icon {
+  animation: spin 0.8s linear infinite;
+}