fix(admin): name the configured geo provider in the system snapshot

The admin system snapshot hardcoded "ipwho.is" for the offline-geo-off
state, so an operator who points IP_GEO_LOOKUP_URL at another provider
still read the wrong host. Resolve the actual provider host from the env
and surface it through /api/version, so the snapshot reads
"Online (ip-api.com)" — the host it really queries.

src/app/api/version/__tests__/route.test.ts

@@ -5,8 +5,10 @@ vi.mock("@/lib/api-handler", () => ({
 }));
 
 const offlineGeoReadyMock = vi.fn(() => false);
+const resolveGeoProviderHostMock = vi.fn(() => "ipwho.is");
 vi.mock("@/lib/geo", () => ({
   offlineGeoReady: () => offlineGeoReadyMock(),
+  resolveGeoProviderHost: () => resolveGeoProviderHostMock(),
 }));
 
 import { GET } from "../route";
@@ -16,6 +18,7 @@ beforeEach(() => {
   delete process.env.NEXT_PUBLIC_APP_BUILT_AT;
   delete process.env.NEXT_PUBLIC_APP_VERSION;
   offlineGeoReadyMock.mockReturnValue(false);
+  resolveGeoProviderHostMock.mockReturnValue("ipwho.is");
 });
 
 interface VersionEnvelope {
@@ -28,6 +31,7 @@ interface VersionEnvelope {
     changelog: string;
     docs: string;
     offlineGeoEnabled: boolean;
+    geoProviderHost: string;
   };
 }
 
@@ -95,4 +99,11 @@ describe("GET /api/version", () => {
     const body = (await response.json()) as VersionEnvelope;
     expect(body.data.offlineGeoEnabled).toBe(true);
   });
+
+  it("surfaces the resolved online geo provider host", async () => {
+    resolveGeoProviderHostMock.mockReturnValue("ip-api.com");
+    const response = await (GET as unknown as () => Promise<Response>)();
+    const body = (await response.json()) as VersionEnvelope;
+    expect(body.data.geoProviderHost).toBe("ip-api.com");
+  });
 });

src/app/api/version/route.ts

@@ -1,6 +1,6 @@
 import { apiHandler } from "@/lib/api-handler";
 import { apiSuccess } from "@/lib/api-response";
-import { offlineGeoReady } from "@/lib/geo";
+import { offlineGeoReady, resolveGeoProviderHost } from "@/lib/geo";
 import packageJson from "../../../../package.json";
 
 // v1.4.27 R5 — `offlineGeoEnabled` reads from the same source the geo
@@ -32,9 +32,11 @@ export const dynamic = "force-dynamic";
  *
  * `offlineGeoEnabled` is `true` when the GeoLite2-City MMDB is present
  * at the configured `GEOLITE2_DIR` and no `.empty` marker is set.
- * When `false` the runtime falls back to the online `ipwho.is`
- * provider and the resolver emits a one-shot admin notification on
- * first use.
+ * When `false` the runtime falls back to the online provider named by
+ * `geoProviderHost` (the host of `IP_GEO_LOOKUP_URL`, default
+ * `ipwho.is`) and the resolver emits a one-shot admin notification on
+ * first use. `geoProviderHost` lets the admin status surface name the
+ * real provider instead of assuming the default.
  */
 export const GET = apiHandler(async () => {
   // v1.4.43 B11 — prefer the build-arg-injected env var so the runtime
@@ -50,6 +52,7 @@ export const GET = apiHandler(async () => {
   const buildSha = process.env.NEXT_PUBLIC_APP_BUILD_SHA?.trim() || null;
   const builtAt = process.env.NEXT_PUBLIC_APP_BUILT_AT?.trim() || null;
   const offlineGeoEnabled = offlineGeoReady();
+  const geoProviderHost = resolveGeoProviderHost();
 
   return apiSuccess({
     version,
@@ -60,5 +63,6 @@ export const GET = apiHandler(async () => {
     changelog: "https://github.com/MBombeck/HealthLog/blob/main/CHANGELOG.md",
     docs: "https://docs.healthlog.dev",
     offlineGeoEnabled,
+    geoProviderHost,
   });
 });