freezmo/app/layout.tsx

import type { Metadata, Viewport } from "next";

import { IceBackdrop } from "@/components/IceBackdrop";
import { InstallSheet } from "@/components/InstallSheet";
import { OfflineBanner } from "@/components/OfflineBanner";
import { ServiceWorkerRegistrar } from "@/components/ServiceWorkerRegistrar";
import { Toaster } from "@/components/Toaster";
import "./globals.css";

export const metadata: Metadata = {
  title: {
    default: "Freezmo — turn your notes into a study feed",
    template: "%s · Freezmo",
  },
  description:
    "Freezmo turns photos and documents of your notes into a swipeable feed of short interactive study activities, powered by your own Ollama models.",
  applicationName: "Freezmo",
  manifest: "/manifest.webmanifest",
  appleWebApp: {
    capable: true,
    title: "Freezmo",
    statusBarStyle: "default",
    /* Startup images so launching from the home screen has no white flash.
       Sized for the common iPhone logical sizes at their device pixel ratio. */
    startupImage: [
      { url: "/icons/splash-750x1334.png", media: "(device-width: 375px) and (device-height: 667px) and (-webkit-device-pixel-ratio: 2)" },
      { url: "/icons/splash-828x1792.png", media: "(device-width: 414px) and (device-height: 896px) and (-webkit-device-pixel-ratio: 2)" },
      { url: "/icons/splash-1170x2532.png", media: "(device-width: 390px) and (device-height: 844px) and (-webkit-device-pixel-ratio: 3)" },
      { url: "/icons/splash-1179x2556.png", media: "(device-width: 393px) and (device-height: 852px) and (-webkit-device-pixel-ratio: 3)" },
      { url: "/icons/splash-1284x2778.png", media: "(device-width: 428px) and (device-height: 926px) and (-webkit-device-pixel-ratio: 3)" },
      { url: "/icons/splash-1290x2796.png", media: "(device-width: 430px) and (device-height: 932px) and (-webkit-device-pixel-ratio: 3)" },
      { url: "/icons/splash-1536x2048.png", media: "(device-width: 768px) and (device-height: 1024px) and (-webkit-device-pixel-ratio: 2)" },
      { url: "/icons/splash-1668x2388.png", media: "(device-width: 834px) and (device-height: 1194px) and (-webkit-device-pixel-ratio: 2)" },
    ],
  },
  icons: {
    icon: [
      // ?v=2 busts browser favicon caches after the icon redesign.
      { url: "/icons/favicon-32.png?v=2", sizes: "32x32", type: "image/png" },
      { url: "/icons/icon-192.png?v=2", sizes: "192x192", type: "image/png" },
      { url: "/icons/icon-512.png?v=2", sizes: "512x512", type: "image/png" },
    ],
    apple: [
      { url: "/icons/apple-touch-icon.png?v=2", sizes: "180x180" },
      { url: "/icons/apple-touch-icon-167.png?v=2", sizes: "167x167" },
      { url: "/icons/apple-touch-icon-152.png?v=2", sizes: "152x152" },
    ],
  },
  other: {
    // iOS standalone niceties
    "apple-mobile-web-app-capable": "yes",
    "mobile-web-app-capable": "yes",
    "format-detection": "telephone=no",
  },
};

export const viewport: Viewport = {
  width: "device-width",
  initialScale: 1,
  // Pinch-zoom stays available for accessibility (double-tap zoom is disabled
  // by `touch-action: manipulation` on the chrome instead). The input
  // font-size rule in globals.css stops iOS Safari's focus auto-zoom, which
  // ignores the viewport meta anyway.
  viewportFit: "cover",
  themeColor: [
    { media: "(prefers-color-scheme: light)", color: "#f4f7fd" },
    { media: "(prefers-color-scheme: dark)", color: "#0e1424" },
  ],
};

/**
 * Applies the saved theme before paint to avoid a flash, and keeps the
 * `theme-color` meta in step with the *app* theme (the SSR metas follow the
 * OS preference, which is wrong once the user has picked a theme here).
 */
const themeScript = `(function(){try{var s=localStorage.getItem('freezmo.theme');var d=s?s==='dark':window.matchMedia('(prefers-color-scheme: dark)').matches;if(d)document.documentElement.classList.add('dark');var l=localStorage.getItem('freezmo.locale.v1');if(l==='cs'||l==='en')document.documentElement.lang=l;var m=document.querySelector('meta[name="theme-color"][data-app]');if(!m){m=document.createElement('meta');m.setAttribute('name','theme-color');m.setAttribute('data-app','1');document.head.insertBefore(m,document.head.firstChild);}m.setAttribute('content',d?'#0e1424':'#f4f7fd');}catch(e){}})();`;

/**
 * Captures Chrome's `beforeinstallprompt` (it can fire before React hydrates)
 * and records an install so the prompt never comes back. Static, no user data.
 */
const installScript = `(function(){try{
window.addEventListener('beforeinstallprompt',function(e){e.preventDefault();window.__freezmoInstallPrompt=e;window.dispatchEvent(new Event('freezmo:installprompt'));});
window.addEventListener('appinstalled',function(){try{localStorage.setItem('freezmo.install.installed','1')}catch(e){}window.dispatchEvent(new Event('freezmo:installed'));});
}catch(e){}})();`;

export default function RootLayout({ children }: { children: React.ReactNode }) {
  return (
    <html lang="en" suppressHydrationWarning>
      <head>
        <script dangerouslySetInnerHTML={{ __html: themeScript }} />
        <script dangerouslySetInnerHTML={{ __html: installScript }} />
      </head>
      <body className="min-h-full antialiased app-shell-in">
        <IceBackdrop />
        {children}
        <InstallSheet />
        <OfflineBanner />
        <Toaster />
        <ServiceWorkerRegistrar />
      </body>
    </html>
  );
}