milestone 30: overview as a dashboard, explicit health contract, period aggregations

admin/src/features/activity/ActivityPage.test.tsx

@@ -9,6 +9,7 @@ import { RouterProvider, createMemoryHistory } from "@tanstack/react-router";
 import { AuthProvider } from "@/auth/store";
 import { createQueryClient } from "@/lib/queryClient";
 import { createAppRouter } from "@/routes";
+import { health } from "@/lib/healthFixture";
 import type { Client, Coverage, QueriesPage, QueryRow } from "@/lib/types";
 import { queryRow } from "@/features/queries/provenanceFixture";
 
@@ -91,6 +92,8 @@ function stubFetch(handler: (url: string) => Response | Promise<Response>) {
 	fetchMock = vi.fn((input: RequestInfo | URL) => {
 		const url = String(input);
 		if (url === "/api/version") return Promise.resolve(json(VERSION));
+		// The shell reads health on every route for the Diagnostics nav badge.
+		if (url === "/api/health") return Promise.resolve(json(health()));
 		return Promise.resolve(handler(url));
 	});
 	vi.stubGlobal("fetch", fetchMock);