diff --git a/src/pages/_app.test.jsx b/src/pages/_app.test.jsx
new file mode 100644
index 000000000..795c569a2
--- /dev/null
+++ b/src/pages/_app.test.jsx
@@ -0,0 +1,37 @@
+// @vitest-environment jsdom
+
+import { render, screen } from "@testing-library/react";
+import { describe, expect, it, vi } from "vitest";
+
+// Next's Head implementation relies on internal Next contexts; stub it for unit tests.
+vi.mock("next/head", () => ({
+  default: ({ children }) => <>{children}</>,
+}));
+
+vi.mock("utils/contexts/color", () => ({
+  ColorProvider: ({ children }) => <>{children}</>,
+}));
+vi.mock("utils/contexts/theme", () => ({
+  ThemeProvider: ({ children }) => <>{children}</>,
+}));
+vi.mock("utils/contexts/settings", () => ({
+  SettingsProvider: ({ children }) => <>{children}</>,
+}));
+vi.mock("utils/contexts/tab", () => ({
+  TabProvider: ({ children }) => <>{children}</>,
+}));
+
+import App from "./_app.jsx";
+
+describe("pages/_app", () => {
+  it("renders the active page component with pageProps", () => {
+    function Page({ message }) {
+      return <div>msg:{message}</div>;
+    }
+
+    render(<App Component={Page} pageProps={{ message: "hello" }} />);
+
+    expect(screen.getByText("msg:hello")).toBeInTheDocument();
+    expect(document.querySelector('meta[name="viewport"]')).toBeTruthy();
+  });
+});
diff --git a/src/pages/_document.test.jsx b/src/pages/_document.test.jsx
new file mode 100644
index 000000000..e617dd59d
--- /dev/null
+++ b/src/pages/_document.test.jsx
@@ -0,0 +1,24 @@
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it, vi } from "vitest";
+
+vi.mock("next/document", () => ({
+  Html: ({ children }) => <div data-testid="html">{children}</div>,
+  Head: ({ children }) => <div data-testid="head">{children}</div>,
+  Main: () => <main data-testid="main" />,
+  NextScript: () => <script data-testid="nextscript" />,
+}));
+
+import Document from "./_document.jsx";
+
+describe("pages/_document", () => {
+  it("renders the PWA meta + custom css links", () => {
+    const html = renderToStaticMarkup(<Document />);
+
+    expect(html).toContain('meta name="mobile-web-app-capable" content="yes"');
+    expect(html).toContain('link rel="manifest" href="/site.webmanifest?v=4"');
+    expect(html).toContain('link rel="preload" href="/api/config/custom.css" as="style"');
+    expect(html).toContain('link rel="stylesheet" href="/api/config/custom.css"');
+    expect(html).toContain('data-testid="main"');
+    expect(html).toContain('data-testid="nextscript"');
+  });
+});
diff --git a/src/pages/browserconfig.xml.test.js b/src/pages/browserconfig.xml.test.js
new file mode 100644
index 000000000..5bd77b61d
--- /dev/null
+++ b/src/pages/browserconfig.xml.test.js
@@ -0,0 +1,38 @@
+import { describe, expect, it, vi } from "vitest";
+
+import themes from "utils/styles/themes";
+
+const { getSettings } = vi.hoisted(() => ({
+  getSettings: vi.fn(),
+}));
+
+vi.mock("utils/config/config", () => ({
+  getSettings,
+}));
+
+import { getServerSideProps } from "./browserconfig.xml.jsx";
+
+function createMockRes() {
+  return {
+    setHeader: vi.fn(),
+    write: vi.fn(),
+    end: vi.fn(),
+  };
+}
+
+describe("pages/browserconfig.xml", () => {
+  it("writes a browserconfig xml response using the selected theme color", async () => {
+    getSettings.mockReturnValueOnce({ color: "slate", theme: "dark" });
+    const res = createMockRes();
+
+    await getServerSideProps({ res });
+
+    expect(res.setHeader).toHaveBeenCalledWith("Content-Type", "text/xml");
+    expect(res.end).toHaveBeenCalled();
+
+    const xml = res.write.mock.calls[0][0];
+    expect(xml).toContain('<?xml version="1.0" encoding="utf-8"?>');
+    expect(xml).toContain('<square150x150logo src="/mstile-150x150.png?v=2"/>');
+    expect(xml).toContain(`<TileColor>${themes.slate.dark}</TileColor>`);
+  });
+});
diff --git a/src/pages/index.test.js b/src/pages/index.test.js
new file mode 100644
index 000000000..2e3b2aae0
--- /dev/null
+++ b/src/pages/index.test.js
@@ -0,0 +1,102 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const { state, getSettings, servicesResponse, bookmarksResponse, widgetsResponse, serverSideTranslations, logger } =
+  vi.hoisted(() => {
+    const state = {
+      throwIn: null,
+    };
+
+    const getSettings = vi.fn(() => ({
+      providers: {},
+      language: "en",
+      title: "Homepage",
+    }));
+
+    const servicesResponse = vi.fn(async () => {
+      if (state.throwIn === "services") throw new Error("services failed");
+      return [{ name: "svc" }];
+    });
+    const bookmarksResponse = vi.fn(async () => {
+      if (state.throwIn === "bookmarks") throw new Error("bookmarks failed");
+      return [{ name: "bm" }];
+    });
+    const widgetsResponse = vi.fn(async () => {
+      if (state.throwIn === "widgets") throw new Error("widgets failed");
+      return [{ type: "search" }];
+    });
+
+    const serverSideTranslations = vi.fn(async (language) => ({ _translations: language }));
+    const logger = { error: vi.fn() };
+
+    return { state, getSettings, servicesResponse, bookmarksResponse, widgetsResponse, serverSideTranslations, logger };
+  });
+
+vi.mock("next/dynamic", () => ({
+  default: () => () => null,
+}));
+vi.mock("next/head", () => ({ default: ({ children }) => children }));
+vi.mock("next/script", () => ({ default: () => null }));
+vi.mock("next/router", () => ({ useRouter: () => ({ asPath: "/" }) }));
+
+vi.mock("next-i18next/serverSideTranslations", () => ({
+  serverSideTranslations,
+}));
+
+vi.mock("utils/logger", () => ({
+  default: () => logger,
+}));
+
+vi.mock("utils/config/config", () => ({
+  getSettings,
+}));
+
+vi.mock("utils/config/api-response", () => ({
+  servicesResponse,
+  bookmarksResponse,
+  widgetsResponse,
+}));
+
+describe("pages/index getStaticProps", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    state.throwIn = null;
+  });
+
+  it("returns initial settings and api fallbacks for swr", async () => {
+    getSettings.mockReturnValueOnce({ providers: { x: 1 }, language: "en", title: "Homepage" });
+
+    const { getStaticProps } = await import("./index.jsx");
+    const result = await getStaticProps();
+
+    expect(result.props.initialSettings).toEqual({ language: "en", title: "Homepage" });
+    expect(result.props.fallback["/api/services"]).toEqual([{ name: "svc" }]);
+    expect(result.props.fallback["/api/bookmarks"]).toEqual([{ name: "bm" }]);
+    expect(result.props.fallback["/api/widgets"]).toEqual([{ type: "search" }]);
+    expect(result.props.fallback["/api/hash"]).toBe(false);
+    expect(serverSideTranslations).toHaveBeenCalledWith("en");
+  });
+
+  it("normalizes legacy language codes before requesting translations", async () => {
+    getSettings.mockReturnValueOnce({ providers: {}, language: "zh-CN" });
+
+    const { getStaticProps } = await import("./index.jsx");
+    await getStaticProps();
+
+    expect(serverSideTranslations).toHaveBeenCalledWith("zh-Hans");
+  });
+
+  it("falls back to empty settings and en translations on errors", async () => {
+    getSettings.mockReturnValueOnce({ providers: {}, language: "de" });
+    state.throwIn = "services";
+
+    const { getStaticProps } = await import("./index.jsx");
+    const result = await getStaticProps();
+
+    expect(result.props.initialSettings).toEqual({});
+    expect(result.props.fallback["/api/services"]).toEqual([]);
+    expect(result.props.fallback["/api/bookmarks"]).toEqual([]);
+    expect(result.props.fallback["/api/widgets"]).toEqual([]);
+    expect(serverSideTranslations).toHaveBeenCalledWith("en");
+    expect(logger.error).toHaveBeenCalled();
+  });
+});
diff --git a/src/pages/robots.txt.test.js b/src/pages/robots.txt.test.js
new file mode 100644
index 000000000..126fd0aa7
--- /dev/null
+++ b/src/pages/robots.txt.test.js
@@ -0,0 +1,41 @@
+import { describe, expect, it, vi } from "vitest";
+
+const { getSettings } = vi.hoisted(() => ({
+  getSettings: vi.fn(),
+}));
+
+vi.mock("utils/config/config", () => ({
+  getSettings,
+}));
+
+import { getServerSideProps } from "./robots.txt.js";
+
+function createMockRes() {
+  return {
+    setHeader: vi.fn(),
+    write: vi.fn(),
+    end: vi.fn(),
+  };
+}
+
+describe("pages/robots.txt", () => {
+  it("allows indexing when disableIndexing is falsey", async () => {
+    getSettings.mockReturnValueOnce({ disableIndexing: false });
+    const res = createMockRes();
+
+    await getServerSideProps({ res });
+
+    expect(res.setHeader).toHaveBeenCalledWith("Content-Type", "text/plain");
+    expect(res.write).toHaveBeenCalledWith("User-agent: *\nAllow: /");
+    expect(res.end).toHaveBeenCalled();
+  });
+
+  it("disallows indexing when disableIndexing is truthy", async () => {
+    getSettings.mockReturnValueOnce({ disableIndexing: true });
+    const res = createMockRes();
+
+    await getServerSideProps({ res });
+
+    expect(res.write).toHaveBeenCalledWith("User-agent: *\nDisallow: /");
+  });
+});
diff --git a/src/pages/site.webmanifest.test.js b/src/pages/site.webmanifest.test.js
new file mode 100644
index 000000000..2eb0274b6
--- /dev/null
+++ b/src/pages/site.webmanifest.test.js
@@ -0,0 +1,55 @@
+import { describe, expect, it, vi } from "vitest";
+
+import themes from "utils/styles/themes";
+
+const { checkAndCopyConfig, getSettings } = vi.hoisted(() => ({
+  checkAndCopyConfig: vi.fn(),
+  getSettings: vi.fn(),
+}));
+
+vi.mock("utils/config/config", () => ({
+  default: checkAndCopyConfig,
+  getSettings,
+}));
+
+import { getServerSideProps } from "./site.webmanifest.jsx";
+
+function createMockRes() {
+  return {
+    setHeader: vi.fn(),
+    write: vi.fn(),
+    end: vi.fn(),
+  };
+}
+
+describe("pages/site.webmanifest", () => {
+  it("writes a manifest json response and triggers a settings config check", async () => {
+    getSettings.mockReturnValueOnce({
+      title: "My Homepage",
+      startUrl: "/start",
+      color: "slate",
+      theme: "dark",
+      pwa: {
+        icons: [{ src: "/i.png", sizes: "1x1", type: "image/png" }],
+        shortcuts: [{ name: "One", url: "/one" }],
+      },
+    });
+
+    const res = createMockRes();
+
+    await getServerSideProps({ res });
+
+    expect(checkAndCopyConfig).toHaveBeenCalledWith("settings.yaml");
+    expect(res.setHeader).toHaveBeenCalledWith("Content-Type", "application/manifest+json");
+    expect(res.end).toHaveBeenCalled();
+
+    const manifest = JSON.parse(res.write.mock.calls[0][0]);
+    expect(manifest.name).toBe("My Homepage");
+    expect(manifest.short_name).toBe("My Homepage");
+    expect(manifest.start_url).toBe("/start");
+    expect(manifest.icons).toEqual([{ src: "/i.png", sizes: "1x1", type: "image/png" }]);
+    expect(manifest.shortcuts).toEqual([{ name: "One", url: "/one" }]);
+    expect(manifest.theme_color).toBe(themes.slate.dark);
+    expect(manifest.background_color).toBe(themes.slate.dark);
+  });
+});
diff --git a/vitest.config.mjs b/vitest.config.mjs
index 8c1b58b2e..3a0337757 100644
--- a/vitest.config.mjs
+++ b/vitest.config.mjs
@@ -11,6 +11,7 @@ export default defineConfig({
   resolve: {
     alias: {
       components: fileURLToPath(new URL("./src/components", import.meta.url)),
+      styles: fileURLToPath(new URL("./src/styles", import.meta.url)),
       "test-utils": fileURLToPath(new URL("./src/test-utils", import.meta.url)),
       utils: fileURLToPath(new URL("./src/utils", import.meta.url)),
       widgets: fileURLToPath(new URL("./src/widgets", import.meta.url)),
diff --git a/vitest.setup.js b/vitest.setup.js
index 50ac0e565..87fe7a4a8 100644
--- a/vitest.setup.js
+++ b/vitest.setup.js
@@ -10,6 +10,8 @@ afterEach(() => {
 
 // implement a couple of common formatters mocked in next-i18next
 vi.mock("next-i18next", () => ({
+  // Keep app/page components importable in unit tests.
+  appWithTranslation: (Component) => Component,
   useTranslation: () => ({
     i18n: { language: "en" },
     t: (key, opts) => {