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/BillEditForm.tsx

@@ -122,7 +122,7 @@ export const BillEditForm: FC<BillEditFormProps> = ({ location, bill }) => {
                     {
                         // don't show the delete button if we are adding a new bill
                         bill ?
-                            <Link href={`/${locale}/bill/${locationID}-${billID}/delete/`} data-tip={t("delete-tooltip")}>
+                            <Link href={`/${locale}/home/bill/${locationID}-${billID}/delete/`} data-tip={t("delete-tooltip")}>
                                 <TrashIcon className="h-[1em] w-[1em] absolute cursor-pointer text-error bottom-5 right-4 text-2xl" />
                             </Link> : null
                     }