fix: keep server env out of avatar client bundle

src/lib/imager.test.ts

@@ -1,20 +1,13 @@
-import { beforeEach, describe, expect, it, vi } from "vitest";
-
-const envMock = vi.hoisted(() => ({
-	env: {
-		NEXT_PUBLIC_IMAGER_URL: "https://img.example.com" as string | undefined,
-		NEXT_PUBLIC_APP_URL: undefined as string | undefined,
-		IMAGING_UPSTREAM_URL: "https://up.example.com" as string | undefined,
-	},
-}));
-
-vi.mock("@/env", () => envMock);
-
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { getAvatarUrl, resolveImagerBase } from "./imager";
 
+afterEach(() => {
+	vi.unstubAllEnvs();
+});
+
 describe("resolveImagerBase", () => {
 	beforeEach(() => {
-		envMock.env.NEXT_PUBLIC_IMAGER_URL = "https://img.example.com";
+		vi.stubEnv("NEXT_PUBLIC_IMAGER_URL", "https://img.example.com");
 	});
 
 	it("returns configured imager env var", () => {
@@ -22,12 +15,12 @@ describe("resolveImagerBase", () => {
 	});
 
 	it("strips trailing slashes", () => {
-		envMock.env.NEXT_PUBLIC_IMAGER_URL = "https://img.example.com/";
+		vi.stubEnv("NEXT_PUBLIC_IMAGER_URL", "https://img.example.com/");
 		expect(resolveImagerBase()).toBe("https://img.example.com");
 	});
 
 	it("falls back to epicnabbo.nl when env var is not set", () => {
-		envMock.env.NEXT_PUBLIC_IMAGER_URL = undefined;
+		vi.stubEnv("NEXT_PUBLIC_IMAGER_URL", "");
 		expect(resolveImagerBase()).toBe(
 			"https://epicnabbo.nl/imaging/avatarimage",
 		);
@@ -36,7 +29,7 @@ describe("resolveImagerBase", () => {
 
 describe("getAvatarUrl", () => {
 	beforeEach(() => {
-		envMock.env.NEXT_PUBLIC_IMAGER_URL = "https://img.example.com";
+		vi.stubEnv("NEXT_PUBLIC_IMAGER_URL", "https://img.example.com");
 	});
 
 	it("builds a query string with defaults (omits default params)", () => {
@@ -83,7 +76,7 @@ describe("getAvatarUrl", () => {
 	});
 
 	it("uses epicnabbo.nl when no env var is set", () => {
-		envMock.env.NEXT_PUBLIC_IMAGER_URL = undefined;
+		vi.stubEnv("NEXT_PUBLIC_IMAGER_URL", "");
 		const url = getAvatarUrl("hd-180-1");
 		expect(url.startsWith("https://epicnabbo.nl/imaging/avatarimage?")).toBe(
 			true,