fix(home/test): kotlin.test assertTrue message overload

The trailing-lambda assertTrue overload treats the block as the
*condition*, not a lazy message — switch to assertTrue(Boolean, String).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

android/app/src/test/java/com/fabledsword/minstrel/home/ui/BuildPlaylistsRowTest.kt

@@ -71,7 +71,7 @@ class BuildPlaylistsRowTest {
         val owned = listOf(songsLike("a", cached = true), user("u1", cached = true))
         val row = buildPlaylistsRow(owned, SystemPlaylistsStatus(), offline = false)
         val reals = row.filterIsInstance<PlaylistRowItem.Real>().map { it.playlist.id }
-        assertTrue("a" !in reals) { "songs-like mix leaked into the Playlists row: $reals" }
+        assertTrue("a" !in reals, "songs-like mix leaked into the Playlists row: $reals")
         assertTrue("u1" in reals)
     }