feat(#28): add continue arrow and auto-advance in BreakOrder step

- Auto-advance when selecting first breaker for Winnerbreak and 2-player Wechselbreak
- Keep auto-advance after choosing second for 3-player Wechselbreak
- Add explicit right arrow to continue manually based on current selection

Refs #28

src/components/NewGame.tsx

@@ -845,8 +845,8 @@ const BreakOrderStep = ({ players, rule, onNext, onCancel }: BreakOrderStepProps
 
   const handleFirst = (idx: number) => {
     setFirst(idx);
-    if (rule === 'wechselbreak' && playerCount === 2) {
-      // second implied
+    // Auto-advance cases: winnerbreak (any players) OR wechselbreak with 2 players
+    if (rule === 'winnerbreak' || (rule === 'wechselbreak' && playerCount === 2)) {
       onNext(idx);
     }
   };
@@ -879,6 +879,21 @@ const BreakOrderStep = ({ players, rule, onNext, onCancel }: BreakOrderStepProps
         <button type="button" className={styles['arrow-btn']} aria-label="Zurück" onClick={onCancel} style={{ fontSize: 48, width: 80, height: 80, borderRadius: '50%', background: '#222', color: '#fff', border: 'none', boxShadow: '0 2px 8px rgba(0,0,0,0.15)', cursor: 'pointer' }}>
           &#8592;
         </button>
+        <button
+          type="button"
+          className={styles['arrow-btn']}
+          aria-label="Weiter"
+          onClick={() => {
+            if (rule === 'wechselbreak' && playerCount === 3) {
+              handleSecond(second);
+            } else {
+              onNext(first);
+            }
+          }}
+          style={{ fontSize: 48, width: 80, height: 80, borderRadius: '50%', background: '#222', color: '#fff', border: 'none', boxShadow: '0 2px 8px rgba(0,0,0,0.15)', cursor: 'pointer' }}
+        >
+          &#8594;
+        </button>
       </div>
     </form>
   );