feat: three-dot context menu on song rows + search shows songs as rows

- Add ⋮ button to every song-item triggering the context menu (same as right-click)
- Show song-actions always visible on touch devices via @media (hover:none)
- Search results: songs now render as makeSongItem rows instead of cards
  (artists/albums remain as horizontal card rows)
- Fix Android app opening system settings on every launch after notification
  permission denial — now only redirects to settings once using notif_settings_shown flag

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

android/app/src/main/kotlin/com/novasonic/app/MainActivity.kt

@@ -206,10 +206,13 @@ class MainActivity : AppCompatActivity(), MusicService.StateListener {
             ContextCompat.checkSelfPermission(this, Manifest.permission.POST_NOTIFICATIONS)
                 == PackageManager.PERMISSION_GRANTED -> return
 
-            // System won't show the dialog again after one denial — send user to settings.
+            // System won't show the dialog again after one denial — send user to settings once.
             !ActivityCompat.shouldShowRequestPermissionRationale(
                 this, Manifest.permission.POST_NOTIFICATIONS
-            ) && _notifPermissionAskedBefore() -> openNotificationSettings()
+            ) && _notifPermissionAskedBefore() && !_notifSettingsShownBefore() -> {
+                markNotifSettingsShown()
+                openNotificationSettings()
+            }
 
             else -> {
                 markNotifPermissionAsked()
@@ -225,9 +228,10 @@ class MainActivity : AppCompatActivity(), MusicService.StateListener {
     ) {
         super.onRequestPermissionsResult(requestCode, permissions, grantResults)
         if (requestCode == 42 &&
-            grantResults.firstOrNull() == PackageManager.PERMISSION_DENIED
+            grantResults.firstOrNull() == PackageManager.PERMISSION_DENIED &&
+            !_notifSettingsShownBefore()
         ) {
-            // Denied — open settings so the user can flip the toggle themselves.
+            markNotifSettingsShown()
             openNotificationSettings()
         }
     }
@@ -247,4 +251,11 @@ class MainActivity : AppCompatActivity(), MusicService.StateListener {
     private fun markNotifPermissionAsked() =
         getSharedPreferences("ns_prefs", MODE_PRIVATE).edit()
             .putBoolean("notif_asked", true).apply()
+
+    private fun _notifSettingsShownBefore() =
+        getSharedPreferences("ns_prefs", MODE_PRIVATE).getBoolean("notif_settings_shown", false)
+
+    private fun markNotifSettingsShown() =
+        getSharedPreferences("ns_prefs", MODE_PRIVATE).edit()
+            .putBoolean("notif_settings_shown", true).apply()
 }