Fix selecting migration destination from source browse search page

When going to the source search from the global search, the manga card mode wasn't passed, which prevented a manga from getting selected as the migration destination

#1110

src/features/migration/MigrationManager.ts

@@ -323,6 +323,7 @@ export class MigrationManager {
                 {
                     state: AppRoutes.migrate.children.singleMangaSearch.state({
                         title: t`Migrate "${manga.title}"`,
+                        mode: 'migrate.select.single',
                     }),
                 },
             );

src/features/migration/screens/MigrationSelectMangas.tsx

@@ -164,7 +164,7 @@ export const MigrationSelectMangas = () => {
     return (
         <>
             <BaseMangaGrid
-                mode="migrate.select"
+                mode="migrate.select.bulk"
                 hasNextPage={false}
                 loadMore={noOp}
                 isLoading={areMangasLoading}