diff --git a/src/frontend/src/api.ts b/src/frontend/src/api.ts
index 4ded441..d40b62e 100644
--- a/src/frontend/src/api.ts
+++ b/src/frontend/src/api.ts
@@ -253,6 +253,25 @@ export const api = {
   artifacts: async (taskId: string): Promise<ArtifactsResult> => ({
     ok: true, deliverable: null, nodes: [],
   }),
+
+  // ── v2.7: Task 进度 + 子 Task ──
+
+  taskProgress: async (taskId: string): Promise<TaskProgress | null> => {
+    try {
+      const pid = _currentProjectId || Object.keys((await api.projects()).projects)[0];
+      if (!pid) return null;
+      return fetchJ<TaskProgress>(`${API_BASE}/api/projects/${pid}/tasks/${taskId}/progress`);
+    } catch { return null; }
+  },
+
+  listSubtasks: async (parentId: string): Promise<Task[]> => {
+    try {
+      const pid = _currentProjectId || Object.keys((await api.projects()).projects)[0];
+      if (!pid) return [];
+      const data = await fetchJ<{ tasks: any[] }>(`${API_BASE}/api/projects/${pid}/tasks?parent_task=${parentId}`);
+      return (data.tasks || []).map(adaptTask);
+    } catch { return []; }
+  },
   artifactPreview: async (taskId: string, path: string): Promise<ArtifactPreviewResult> => ({
     ok: false, previewable: false, name: '', type: '', render_as: '', size: 0, content: null,
   }),