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/AddMonthButton.tsx

@@ -18,7 +18,7 @@ export const AddMonthButton:React.FC<AddMonthButtonProps> = ({ yearMonth }) => {
 
     return(
         <div className="card card-compact shadow-s mb-4">
-            <Link href={`/${locale}/year-month/${formatYearMonth(yearMonth)}/add`} className='grid self-center tooltip' data-tip={t("tooltip")}>
+            <Link href={`/${locale}/home/year-month/${formatYearMonth(yearMonth)}/add`} className='grid self-center tooltip' data-tip={t("tooltip")}>
                 <span className='flex self-center'>
                     <CalendarDaysIcon className="h-[1em] w-[1em] cursor-pointer text-4xl"  />
                     <PlusCircleIcon className="h-[1em] w-[1em] cursor-pointer text-xl text-green-500 ml-[-.4em] mt-[-.4em]"  />