fix: artist page resolved "Flay!" to the far more popular "K.FLAY"

The Deezer artist match required only that every query word appear in the candidate name, so
"Flay!" (query word: flay) matched "K.FLAY" (words: k, flay). Sorted by fan count, K.FLAY
(54,822 fans) buried the real "Flay!" (39 fans) — the page showed K.FLAY's fans + top tracks.

Now prefer an EXACT normalized-name match ("flay" == "flay", not "kflay"), falling back to the
loose match only when there's no exact one. Web (detail.js) + Android (ArtistViewModel).
Verified against Deezer: exact match selects the real Flay! (id 12242284, whose top tracks
are actually Flay!). SW ns-v60.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

android/app/src/main/kotlin/com/novasonic/app/viewmodel/ArtistViewModel.kt

@@ -112,12 +112,15 @@ class ArtistViewModel(app: Application, savedState: SavedStateHandle) : AndroidV
         }.getOrNull()
 
         val artists = searchResp?.results?.filter { it.wrapperType == "artist" } ?: emptyList()
-        // artists are sorted by fan count (ItunesClient), so the first name match is the most popular
-        // one — disambiguates same-name artists (5x "Joji").
+        // artists are fan-sorted (ItunesClient), so firstOrNull gives the most popular match.
+        // Prefer an EXACT normalized-name match: "Flay!" must not resolve to the far more popular
+        // "K.FLAY" (its name merely contains "flay"). Only fall back to a loose contains-match.
+        fun norm(s: String?) = (s ?: "").lowercase().replace(Regex("[^a-z0-9]"), "")
+        val q = norm(artistName)
         val iArtist = (
-            artists.find { it.artistName?.equals(artistName, ignoreCase = true) == true }
-                ?: artists.find {
-                    val n = it.artistName ?: return@find false
+            artists.firstOrNull { norm(it.artistName) == q }
+                ?: artists.firstOrNull {
+                    val n = it.artistName ?: return@firstOrNull false
                     n.contains(artistName, ignoreCase = true) || artistName.contains(n, ignoreCase = true)
                 }
                 ?: artists.firstOrNull()