Restructure application to use /home for authenticated pages

- Move authenticated home page from /[locale] to /[locale]/home
- Move login page from /[locale]/login to /[locale] (new landing page)
- Move all restricted pages (bill, location, year-month, print, account) under /[locale]/home
- Simplify middleware to protect all routes under /home instead of using publicPages array
- Update auth config: change signIn page from /login to /
- Update SignInButton callback URL to redirect to /home after login
- Update all internal links throughout the application to reflect new structure
- Update server action redirects in navigationActions.ts
- Public share routes (/share/*) remain unchanged

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/ui/NotFoundPage.tsx

@@ -12,7 +12,7 @@ export const NotFoundPage:FC<NotFoundPageProps> = ({ title="404 Not Found", desc
         <FaceFrownIcon className="w-10 text-gray-400" />
         <h2 className="text-xl font-semibold">{title}</h2>
         <p>{description}</p>
-        <Link href="/" className="mt-4 rounded-md bg-blue-500 px-4 py-2 text-sm text-white transition-colors hover:bg-blue-400">
+        <Link href="/home" className="mt-4 rounded-md bg-blue-500 px-4 py-2 text-sm text-white transition-colors hover:bg-blue-400">
             Go Back
         </Link>
     </main>