Health endpoint, file types config, budget rename, UI fixes

- Add /api/health endpoint (returns 200 OK without auth)
- Update docker-compose healthcheck to use /api/health
- Admin: configurable allowed file types
- Budget categories can now be renamed (inline edit)
- Place inspector: opening hours + files side by side on desktop
- Address clamped to 2 lines, coordinates hidden on mobile
- Category icon-only on mobile, rating hidden on mobile
- Time validation: "10" becomes "10:00"
- Hotel picker: separate save button, edit opens full popup
- Day header background improved for dark mode
- Notes: 150 char limit with counter, textarea input
- Files grid: full width when no opening hours
- Various responsive fixes

client/src/components/Planner/PlaceInspector.jsx

@@ -344,8 +344,8 @@ export default function PlaceInspector({
             )
           })()}
 
-          {/* Opening hours + Files — side by side on desktop */}
-          <div className="grid grid-cols-1 sm:grid-cols-2 gap-2">
+          {/* Opening hours + Files — side by side on desktop only if both exist */}
+          <div className={`grid grid-cols-1 ${openingHours?.length > 0 ? 'sm:grid-cols-2' : ''} gap-2`}>
           {openingHours && openingHours.length > 0 && (
             <div style={{ background: 'var(--bg-hover)', borderRadius: 10, overflow: 'hidden' }}>
               <button