update

frontend/src/pages/FahrzeugBuchungen.tsx

@@ -238,7 +238,8 @@ function FahrzeugBuchungen() {
       .checkAvailability(
         form.fahrzeugId,
         new Date(form.beginn),
-        new Date(form.ende)
+        new Date(form.ende),
+        editingBooking?.id
       )
       .then((result) => {
         if (!cancelled) setAvailability(result);
@@ -249,7 +250,7 @@ function FahrzeugBuchungen() {
     return () => {
       cancelled = true;
     };
-  }, [form.fahrzeugId, form.beginn, form.ende]);
+  }, [form.fahrzeugId, form.beginn, form.ende, editingBooking?.id]);
 
   const openCreateDialog = () => {
     setEditingBooking(null);
@@ -693,15 +694,17 @@ function FahrzeugBuchungen() {
                   Von: {detailBooking.gebucht_von_name}
                 </Typography>
               )}
-              {canWrite && (
+              {(canWrite || detailBooking.gebucht_von === user?.id) && (
                 <Box sx={{ mt: 1.5, display: 'flex', gap: 1 }}>
-                  <Button
-                    size="small"
-                    startIcon={<Edit />}
-                    onClick={handleOpenEdit}
-                  >
-                    Bearbeiten
-                  </Button>
+                  {canWrite && (
+                    <Button
+                      size="small"
+                      startIcon={<Edit />}
+                      onClick={handleOpenEdit}
+                    >
+                      Bearbeiten
+                    </Button>
+                  )}
                   <Button
                     size="small"
                     color="error"