v1.6.5: fix attendance unique constraint, schema sync, seed script

- Change attendance idx_attendance_user_date from unique to index (allow multiple shifts per day)
- Reset migrations to single baseline init migration
- Add seed script with admin user (admin/admin)
- Update CLAUDE.md with migration workflow documentation
- Various frontend fixes (queries, pages, hooks)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/admin/pages/Vehicles.tsx

@@ -63,7 +63,7 @@ export default function Vehicles() {
 
   useModalLock(showModal);
 
-  if (!hasPermission("trips.vehicles")) return <Forbidden />;
+  if (!hasPermission("vehicles.manage")) return <Forbidden />;
 
   const openCreateModal = () => {
     setEditingVehicle(null);
@@ -117,6 +117,7 @@ export default function Vehicles() {
       if (result.success) {
         setShowModal(false);
         queryClient.invalidateQueries({ queryKey: ["vehicles"] });
+        queryClient.invalidateQueries({ queryKey: ["trips"] });
         alert.success(result.message);
       } else {
         alert.error(result.error);
@@ -142,6 +143,7 @@ export default function Vehicles() {
       if (result.success) {
         setDeleteConfirm({ show: false, vehicle: null });
         queryClient.invalidateQueries({ queryKey: ["vehicles"] });
+        queryClient.invalidateQueries({ queryKey: ["trips"] });
         alert.success(result.message);
       } else {
         alert.error(result.error);
@@ -163,6 +165,7 @@ export default function Vehicles() {
 
       if (result.success) {
         queryClient.invalidateQueries({ queryKey: ["vehicles"] });
+        queryClient.invalidateQueries({ queryKey: ["trips"] });
         alert.success(
           vehicle.is_active
             ? "Vozidlo bylo deaktivováno"