diff --git a/docs/IM-前后端对接文档.md b/docs/IM-前后端对接文档.md
index 4d91c5e..dde8047 100644
--- a/docs/IM-前后端对接文档.md
+++ b/docs/IM-前后端对接文档.md
@@ -1500,7 +1500,7 @@ X-MeetingIM-APIKey: <预置的普通 API Key>
 **状态：新增。**
 
 - 查询最新公告：`GET /v1/im/groups/{topic}/announcements/latest`；发布/更新：`PUT /v1/im/groups/{topic}/announcements/current`，Body `{"content":"...","version":1}`。
-- 返回 `announcement_id,content,author,version,published_at`。仅有权限角色可写，使用乐观锁防覆盖。
+- 返回 `announcement_id,topic,content,author,version,published_at,permissions.can_edit`；即使暂无公告也返回空公告和编辑权限。仅有权限角色可写，使用乐观锁防覆盖。
 - 发布成功后服务端生成 `group.announcement.updated` 群业务事件；顶部摘要使用接口返回数据，不解析聊天文本猜测。
 
 ### 6.8 群公告状态／邀请进群申请同时存在.png
diff --git a/server/im_http.go b/server/im_http.go
index a8eb410..95252bf 100644
--- a/server/im_http.go
+++ b/server/im_http.go
@@ -5224,7 +5224,7 @@ func serveIMGroupAnnouncements(wrt http.ResponseWriter, req *http.Request, topic
 			logs.Warn.Println("im group announcement latest: returning empty after store error", principal.TenantID, topic, err)
 			ann = nil
 		}
-		writeIMSuccess(wrt, req, groupAnnouncementPayload(ann))
+		writeIMSuccess(wrt, req, groupAnnouncementPayloadWithPermissions(topic, ann, selfSub))
 	case tail == "announcements/current" && req.Method == http.MethodPut:
 		if !(selfSub.ModeGiven & selfSub.ModeWant).IsAdmin() {
 			writeIMError(wrt, req, http.StatusForbidden, 30005, imReasonPermissionDenied, "permission denied", nil)
@@ -5257,7 +5257,7 @@ func serveIMGroupAnnouncements(wrt http.ResponseWriter, req *http.Request, topic
 			return
 		}
 		dispatchIMGroupEvents(principal.TenantID)
-		writeIMSuccess(wrt, req, groupAnnouncementPayload(announcement))
+		writeIMSuccess(wrt, req, groupAnnouncementPayloadWithPermissions(topic, announcement, selfSub))
 	case strings.HasPrefix(tail, "announcements/") && strings.HasSuffix(tail, "/read") && req.Method == http.MethodPost:
 		announcementID := strings.TrimSuffix(strings.TrimPrefix(tail, "announcements/"), "/read")
 		now := time.Now().UTC().Round(time.Millisecond)
@@ -5272,7 +5272,7 @@ func serveIMGroupAnnouncements(wrt http.ResponseWriter, req *http.Request, topic
 			logs.Warn.Println("im group announcement get: returning empty after store error", principal.TenantID, topic, err)
 			ann = nil
 		}
-		writeIMSuccess(wrt, req, groupAnnouncementPayload(ann))
+		writeIMSuccess(wrt, req, groupAnnouncementPayloadWithPermissions(topic, ann, selfSub))
 	default:
 		writeIMError(wrt, req, http.StatusMethodNotAllowed, 30002, imReasonMethodNotAllowed, "method not allowed", nil)
 	}
@@ -7097,6 +7097,19 @@ func groupAnnouncementPayload(ann *types.GroupAnnouncement) map[string]any {
 	}
 }
 
+func groupAnnouncementPayloadWithPermissions(topic string, ann *types.GroupAnnouncement, selfSub *types.Subscription) map[string]any {
+	data := groupAnnouncementPayload(ann)
+	data["topic"] = topic
+	access := types.ModeNone
+	if selfSub != nil {
+		access = selfSub.ModeGiven & selfSub.ModeWant
+	}
+	data["permissions"] = map[string]any{
+		"can_edit": access.IsAdmin(),
+	}
+	return data
+}
+
 func groupMutePayload(mute types.GroupMute) map[string]any {
 	data := map[string]any{
 		"user_id":  mute.UserID.UserId(),
diff --git a/server/im_http_test.go b/server/im_http_test.go
index 4d55c29..d339ca8 100644
--- a/server/im_http_test.go
+++ b/server/im_http_test.go
@@ -4350,6 +4350,39 @@ func TestServeIMGroupAnnouncementGovernanceJoinRequest(t *testing.T) {
 	}
 }
 
+func TestServeIMGroupAnnouncementLatestIncludesEditPermission(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+	oldStore := store.Store
+	oldGroupBusiness := store.GroupBusiness
+	oldSubs := store.Subs
+	mockStore := expectIMBearer(t, ctrl, "token-1", 7, 42)
+	store.Store = mockStore
+	subs := mock_store.NewMockSubsPersistenceInterface(ctrl)
+	store.Subs = subs
+	store.GroupBusiness = &testGroupBusinessStore{}
+	defer func() {
+		store.Store = oldStore
+		store.Subs = oldSubs
+		store.GroupBusiness = oldGroupBusiness
+	}()
+	selfSub := &types.Subscription{TenantID: 7, User: types.Uid(42).String(), Topic: "grpAlpha", ModeWant: types.ModeCFull, ModeGiven: types.ModeCFull}
+	subs.EXPECT().Get(types.TenantID(7), "grpAlpha", types.Uid(42), false).Return(selfSub, nil)
+
+	req := httptest.NewRequest(http.MethodGet, "/v1/im/groups/grpAlpha/announcements/latest", nil)
+	req.Header.Set("Authorization", "Bearer token-1")
+	rec := httptest.NewRecorder()
+	serveIMGroupResource(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("latest announcement status: got %d body=%s", rec.Code, rec.Body.String())
+	}
+	data := decodeIMHTTPResponse(t, rec).Data.(map[string]any)
+	permissions := data["permissions"].(map[string]any)
+	if data["topic"] != "grpAlpha" || data["announcement_id"] != "" || permissions["can_edit"] != true {
+		t.Fatalf("unexpected latest announcement response: %#v", data)
+	}
+}
+
 func TestServeIMGroupAdminsMutesAndOwnerTransfer(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()