fix: 群详情成员分页并与后端能力对齐

internal/admin/a3_test.go

@@ -272,6 +272,33 @@ func TestGroupsCRUD(t *testing.T) {
 		t.Fatalf("created=%+v", created)
 	}
 
+	res = doReq(t, client, http.MethodGet, base+"/api/admin/groups/"+created.ID+"?limit=1", "", nil)
+	env = decodeEnv(t, res)
+	if res.StatusCode != 200 || !env.OK {
+		t.Fatalf("get page1: %d %+v", res.StatusCode, env)
+	}
+	var page1 struct {
+		MemberTotal float64 `json:"member_total"`
+		Members     []any   `json:"members"`
+		NextCursor  string  `json:"next_cursor"`
+	}
+	_ = json.Unmarshal(env.Data, &page1)
+	if page1.MemberTotal != 3 || len(page1.Members) != 1 || page1.NextCursor == "" {
+		t.Fatalf("page1=%+v raw=%s", page1, env.Data)
+	}
+	res = doReq(t, client, http.MethodGet, base+"/api/admin/groups/"+created.ID+"?limit=1&cursor="+page1.NextCursor, "", nil)
+	env = decodeEnv(t, res)
+	if res.StatusCode != 200 || !env.OK {
+		t.Fatalf("get page2: %d %+v", res.StatusCode, env)
+	}
+	var page2 struct {
+		Members []any `json:"members"`
+	}
+	_ = json.Unmarshal(env.Data, &page2)
+	if len(page2.Members) != 1 {
+		t.Fatalf("page2 members=%d", len(page2.Members))
+	}
+
 	res = doReq(t, client, http.MethodPatch, base+"/api/admin/groups/"+created.ID,
 		`{"name":"新名"}`, csrf())
 	env = decodeEnv(t, res)

internal/admin/groups.go

@@ -209,6 +209,7 @@ LIMIT ? OFFSET ?`, id, limit, offset)
 		"name":          name,
 		"owner_id":      owner,
 		"created_at_ms": created,
+		"member_total":  memberTotal,
 		"members":       members,
 		"next_cursor":   next,
 	})