fix(tasks): 任务取消 - 禁止取消已开始的生成任务

web/test/task-media-fallback.test.ts

@@ -35,3 +35,22 @@ describe("media fallback", () => {
         expect(page).toContain("onUnavailable={() => setUnavailableUrl(url)}");
     });
 });
+
+describe("task cancellation policy", () => {
+    test("offers cancellation only while a task is queued", () => {
+        const shared = source("../src/pages/tasks/task-shared.tsx");
+        const list = source("../src/pages/tasks/task-list-row.tsx");
+        const grid = source("../src/pages/tasks/task-grid-card.tsx");
+        const page = source("../src/pages/tasks/index.tsx");
+
+        expect(shared).toContain('return task.status === "queued";');
+        expect(list).toContain("const isCancellable = isTaskCancellable(task);");
+        expect(list).toContain("{isCancellable ? (");
+        expect(grid).toContain("const isCancellable = isTaskCancellable(task);");
+        expect(grid).toContain("{isCancellable ? (");
+        expect(page).toContain('if (action === "cancel" && currentTask && !isTaskCancellable(currentTask))');
+        expect(page).toContain('message.warning("任务已开始生成，无法取消")');
+        expect(page).toContain('detailTask.provider === "dreamina-cli" && isTaskCancellable(detailTask)');
+        expect(page).not.toContain('detailTask.status === "queued" || detailTask.status === "running"');
+    });
+});