Fix linting and typescript errors

src/screens/types.ts

@@ -1,5 +1,9 @@
+import { StackNavigationProp } from '@react-navigation/stack';
+
 export interface ModalStackParams {
     [key: string]: Record<string, unknown> | undefined;
     SetJellyfinServer: undefined;
     TrackPopupMenu: { trackId: string };
-}
+}
+
+export type ModalNavigationProp = StackNavigationProp<ModalStackParams>;