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/PrintButton.tsx

@@ -12,7 +12,7 @@ export const PrintButton: React.FC<PrintButtonProps> = ({ yearMonth }) => {
   const t = useTranslations("home-page.month-card");
 
   const handlePrintClick = () => {
-    window.open(`/print/${yearMonth.year}/${yearMonth.month}`, '_blank');
+    window.open(`/home/print/${yearMonth.year}/${yearMonth.month}`, '_blank');
   };
 
   return (