MiniABS 1.4: smaller player controls

- Play/pause becomes a rounded rectangle (58x46dp) instead of a 78dp circle,
  with 32dp icons and wider spacing (play_w/play_h/play_gap in dimens.xml)
- Skip buttons shrink from 82x56dp to 62x42dp, with 16sp text
- Version 1.4 (versionCode 5); there was no public 1.3

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

res/drawable/btn_round.xml

@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:state_pressed="true">
-        <shape android:shape="oval"><solid android:color="#FFC766" /></shape>
+        <shape><solid android:color="#FFC766" /><corners android:radius="23dp" /></shape>
     </item>
     <item>
-        <shape android:shape="oval"><solid android:color="@color/accent" /></shape>
+        <shape><solid android:color="@color/accent" /><corners android:radius="23dp" /></shape>
     </item>
 </selector>