quick fix till we do a proper Z index overhaul

frontend/src/components/FileManager.tsx

@@ -100,6 +100,7 @@ const FileManager: React.FC<FileManagerProps> = ({ selectedTool }) => {
       radius="md"
       className="overflow-hidden p-0"
       withCloseButton={false}
+      zIndex={1100}
       styles={{
         content: {
           position: 'relative',

frontend/src/components/shared/FilePickerModal.tsx

@@ -125,6 +125,7 @@ const FilePickerModal = ({
       title={t("fileUpload.selectFromStorage", "Select Files from Storage")}
       size="lg"
       scrollAreaComponent={ScrollArea.Autosize}
+      zIndex={1100}
     >
       <Stack gap="md">
         {storedFiles.length === 0 ? (