fix(android): uniform icon-only action buttons in playlist detail

Since the offline-download button was added, four buttons shared one row while Play
and Shuffle also carried text labels — the labels got squeezed out and the buttons
looked compressed. All four are now equal-width and icon-only (play, shuffle, edit,
download); Play stays filled as the primary action, the rest tint accent when
active/done. Icons carry contentDescriptions for accessibility.

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

android/app/src/main/kotlin/com/novasonic/app/ui/screen/PlaylistDetailScreen.kt

@@ -196,7 +196,10 @@ fun PlaylistDetailScreen(
                 }
             }
 
-            // ── Play / Shuffle / Edit-mode row ────────────────────────────────
+            // ── Play / Shuffle / Edit / Download ──────────────────────────────
+            // Four buttons in one row left no room for labels (the Play/Shuffle text was being
+            // clipped away), so all four are equal-width and icon-only. Play stays filled as the
+            // primary action; the rest are outlined and tint accent when active/done.
             Row(
                 Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 12.dp),
                 horizontalArrangement = Arrangement.spacedBy(10.dp),
@@ -206,35 +209,33 @@ fun PlaylistDetailScreen(
                     modifier = Modifier.weight(1f).height(46.dp),
                     colors = ButtonDefaults.buttonColors(containerColor = NsAccent, contentColor = Color.White),
                     shape = RoundedCornerShape(14.dp),
+                    contentPadding = PaddingValues(0.dp),
                 ) {
-                    Icon(Icons.Default.PlayArrow, null, modifier = Modifier.size(20.dp))
+                    Icon(Icons.Default.PlayArrow, "Abspielen", modifier = Modifier.size(22.dp))
-                    Spacer(Modifier.width(6.dp))
-                    Text("Play", fontFamily = Outfit, fontWeight = FontWeight.Bold, fontSize = 15.sp)
                 }
                 OutlinedButton(
                     onClick = { if (pl.entry.isNotEmpty()) onPlay(pl.entry.shuffled(), 0) },
                     modifier = Modifier.weight(1f).height(46.dp),
                     border = ButtonDefaults.outlinedButtonBorder(enabled = true).copy(brush = SolidColor(NsAccent.copy(alpha = 0.55f))),
                     shape = RoundedCornerShape(14.dp),
+                    contentPadding = PaddingValues(0.dp),
                 ) {
-                    Icon(Icons.Default.Shuffle, null, modifier = Modifier.size(20.dp), tint = NsAccent)
+                    Icon(Icons.Default.Shuffle, "Zufällig abspielen", modifier = Modifier.size(20.dp), tint = NsAccent)
-                    Spacer(Modifier.width(6.dp))
-                    Text("Shuffle", fontFamily = Outfit, fontWeight = FontWeight.Bold, fontSize = 15.sp, color = NsAccent)
                 }
                 // Toggle edit mode for removing songs
                 OutlinedButton(
                     onClick = { editMode = !editMode },
-                    modifier = Modifier.height(46.dp),
+                    modifier = Modifier.weight(1f).height(46.dp),
                     border = ButtonDefaults.outlinedButtonBorder(enabled = true).copy(
                         brush = SolidColor(if (editMode) NsAccent else NsOnSurface3)
                     ),
                     shape = RoundedCornerShape(14.dp),
-                    contentPadding = PaddingValues(horizontal = 14.dp),
+                    contentPadding = PaddingValues(0.dp),
                 ) {
                     Icon(
                         if (editMode) Icons.Default.Done else Icons.Default.Edit,
-                        null,
+                        if (editMode) "Bearbeiten beenden" else "Titel entfernen",
-                        modifier = Modifier.size(18.dp),
+                        modifier = Modifier.size(20.dp),
                         tint = if (editMode) NsAccent else NsOnSurface2,
                     )
                 }
@@ -242,17 +243,17 @@ fun PlaylistDetailScreen(
                 val dlDone = downloadGroup?.let { it.downloadedTracks >= it.totalTracks && it.totalTracks > 0 } ?: false
                 OutlinedButton(
                     onClick = { if (!dlDone) vm.downloadPlaylist() },
-                    modifier = Modifier.height(46.dp),
+                    modifier = Modifier.weight(1f).height(46.dp),
                     border = ButtonDefaults.outlinedButtonBorder(enabled = true).copy(
                         brush = SolidColor(if (dlDone) NsAccent else NsOnSurface3)
                     ),
                     shape = RoundedCornerShape(14.dp),
-                    contentPadding = PaddingValues(horizontal = 14.dp),
+                    contentPadding = PaddingValues(0.dp),
                 ) {
                     when {
-                        dlDone        -> Icon(Icons.Default.CheckCircle, null, modifier = Modifier.size(18.dp), tint = NsAccent)
+                        dlDone        -> Icon(Icons.Default.CheckCircle, "Offline verfügbar", modifier = Modifier.size(20.dp), tint = NsAccent)
-                        isDownloading -> CircularProgressIndicator(modifier = Modifier.size(16.dp), strokeWidth = 2.dp, color = NsAccent)
+                        isDownloading -> CircularProgressIndicator(modifier = Modifier.size(18.dp), strokeWidth = 2.dp, color = NsAccent)
-                        else          -> Icon(Icons.Default.Download, null, modifier = Modifier.size(18.dp), tint = NsOnSurface2)
+                        else          -> Icon(Icons.Default.Download, "Herunterladen", modifier = Modifier.size(20.dp), tint = NsOnSurface2)
                     }
                 }
             }