fix(type): every app and every template a customer generates starts on Zen

Thirteen shipped apps and every scaffold in packages/create-app pulled their
face from Google at request time — Inter through next/font/google in the
examples and the four Next templates, Geist and Geist_Mono in the apps, and in
the seven react-router roots a bare <link> to fonts.googleapis.com. That last
one never even applied what it fetched: nothing in those trees set a family, so
the browser downloaded Inter, spent two preconnects on it, and rendered
system-ui. So `create-app` handed a customer a new docs site whose first act was
a third-party font request for a face that is not ours.

The apps read the family back through --font-sans and --font-mono, which are
next/font's handles rather than names of anything, so those follow the binding
over to --font-zen-sans and --font-zen-mono. Eight of them had only ever bound
the mono and were leaning on Tailwind's default for the text face; they now name
both, or swapping the binding would have dropped the body copy to system-ui
without a word.

Zen and ZenMono are built faces, not constructors — subsetting, display: swap
and fallback metrics are already in them — so the call and its options go away.

examples/python/app/layout.tsx

@@ -1,15 +1,11 @@
 import './global.css';
 import { RootProvider } from '@hanzo/docs/ui/provider/next';
-import { Inter } from 'next/font/google';
+import { Zen } from '@hanzo/font';
 import type { ReactNode } from 'react';
 
-const inter = Inter({
-  subsets: ['latin'],
-});
-
 export default function Layout({ children }: { children: ReactNode }) {
   return (
-    <html lang="en" className={inter.className} suppressHydrationWarning>
+    <html lang="en" className={Zen.className} suppressHydrationWarning>
       <body className="flex flex-col min-h-screen">
         <RootProvider>{children}</RootProvider>
       </body>

examples/python/package.json

@@ -15,6 +15,7 @@
     "@hanzo/docs-mdx": "workspace:*",
     "@hanzo/docs-python": "workspace:*",
     "@hanzo/docs-base-ui": "workspace:*",
+    "@hanzo/font": "^1.9.2",
     "next": "16.1.6",
     "react": "^19.2.4",
     "react-dom": "^19.2.4"