Alternating option for Unilateral exercises

src/components/Tracker/SetLogger.tsx

@@ -106,6 +106,13 @@ const SetLogger: React.FC<SetLoggerProps> = ({ tracker, lang, onLogSet, isSporad
                             >
                                 {t('left', lang)}
                             </button>
+                            <button
+                                onClick={() => setUnilateralSide('ALTERNATELY')}
+                                className={`w-full text-center px-4 py-2 rounded-full text-sm font-medium transition-colors ${unilateralSide === 'ALTERNATELY' ? 'bg-tertiary-container text-on-tertiary-container' : 'text-on-surface-variant hover:bg-surface-container-high'
+                                    }`}
+                            >
+                                {t('alternately', lang) || 'Alternately'}
+                            </button>
                             <button
                                 onClick={() => setUnilateralSide('RIGHT')}
                                 className={`w-full text-center px-4 py-2 rounded-full text-sm font-medium transition-colors ${unilateralSide === 'RIGHT' ? 'bg-secondary-container text-on-secondary-container' : 'text-on-surface-variant hover:bg-surface-container-high'