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/MonthLocationList.tsx

@@ -106,10 +106,10 @@ export const MonthLocationList:React.FC<MonthLocationListProps  > = ({
     const handleMonthToggle = (yearMonth:YearMonth) => {
         // if the month is already expanded, collapse it
         if(expandedMonth === yearMonth.month) {
-            // router.push(`/?year=${yearMonth.year}`);
+            // router.push(`/home?year=${yearMonth.year}`);
             setExpandedMonth(-1); // no month is expanded
         } else  {
-            // router.push(`/?year=${yearMonth.year}&month=${yearMonth.month}`);
+            // router.push(`/home?year=${yearMonth.year}&month=${yearMonth.month}`);
             setExpandedMonth(yearMonth.month);
         }
     }