feat(#28): add break rule & order to games and UI

- Types: add BreakRule, break metadata to StandardGame, extend NewGameData/steps
- NewGame: add BreakRule and BreakOrder steps with auto-advance
- NewGameScreen: wire new steps into flow
- GameService: set up defaults, persist break order, compute next breaker on +1
- GameDetail: show breaker indicator; treat -1 as undo equivalent

Backfill defaults for existing games via service logic.

Refs #28

src/components/GameDetail.tsx

@@ -45,7 +45,17 @@ const GameDetail = ({ game, onFinishGame, onUpdateScore, onUpdateGame, onUndo, o
               className={styles['player-score'] + (name === 'Fränky' ? ' ' + styles['franky'] : '')}
               key={name + idx}
             >
-              <span className={styles['player-name']}>{name}</span>
+              <span className={styles['player-name']}>
+                {(() => {
+                  const order = (game as any).breakOrder as number[] | undefined;
+                  const breakerIdx = (game as any).currentBreakerIdx as number | undefined;
+                  if (order && typeof breakerIdx === 'number' && order[breakerIdx] === idx + 1) {
+                    return <span title="Break" aria-label="Break" style={{ display: 'inline-block', width: 10, height: 10, borderRadius: '50%', background: '#fff', marginRight: 6, verticalAlign: 'middle' }} />;
+                  }
+                  return null;
+                })()}
+                {name}
+              </span>
               <div className={styles['progress-bar']}>
                 <div 
                   className={styles['progress-fill']} 
@@ -72,7 +82,7 @@ const GameDetail = ({ game, onFinishGame, onUpdateScore, onUpdateGame, onUndo, o
                 <button
                   className={styles['score-button']}
                   disabled={isCompleted}
-                  onClick={() => handleScoreUpdate(idx+1, -1)}
+                  onClick={() => (onUndo ? onUndo() : undefined)}
                   aria-label={`Punkt abziehen für ${name}`}
                   title={`Punkt abziehen für ${name}`}
                 >-</button>

src/components/NewGame.tsx

@@ -14,6 +14,7 @@ import {
   FORM_CONFIG,
   ERROR_STYLES
 } from '../utils/constants';
+import type { BreakRule } from '../types/game';
 
 interface PlayerSelectModalProps {
   players: string[];
@@ -793,4 +794,94 @@ const RaceToStep = ({ onNext, onCancel, initialValue = '', gameType }: RaceToSte
   );
 };
 
-export { Player1Step, Player2Step, Player3Step, GameTypeStep, RaceToStep }; 
+interface BreakRuleStepProps {
+  onNext: (rule: BreakRule) => void;
+  onCancel: () => void;
+  initialValue?: BreakRule | '';
+}
+
+const BreakRuleStep = ({ onNext, onCancel, initialValue = 'winnerbreak' }: BreakRuleStepProps) => {
+  const [rule, setRule] = useState<BreakRule>(initialValue as BreakRule);
+
+  return (
+    <form className={styles['new-game-form']} aria-label="Break-Regel wählen">
+      <div className={styles['screen-title']}>Neues Spiel – Schritt 4/6</div>
+      <div style={{ display: 'flex', gap: 12, marginTop: 12 }}>
+        {[
+          { key: 'winnerbreak', label: 'Winnerbreak' },
+          { key: 'wechselbreak', label: 'Wechselbreak' },
+        ].map(opt => (
+          <button
+            key={opt.key}
+            type="button"
+            className={`${styles['quick-pick-btn']} ${rule === (opt.key as BreakRule) ? styles['selected'] : ''}`}
+            onClick={() => { setRule(opt.key as BreakRule); onNext(opt.key as BreakRule); }}
+            aria-label={`Break-Regel wählen: ${opt.label}`}
+          >
+            {opt.label}
+          </button>
+        ))}
+      </div>
+      <div className={styles['arrow-nav']} style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginTop: 48 }}>
+        <button type="button" className={styles['arrow-btn']} aria-label="Zurück" onClick={onCancel} style={{ fontSize: 48, width: 80, height: 80, borderRadius: '50%', background: '#222', color: '#fff', border: 'none', boxShadow: '0 2px 8px rgba(0,0,0,0.15)', cursor: 'pointer' }}>
+          &#8592;
+        </button>
+      </div>
+    </form>
+  );
+};
+
+interface BreakOrderStepProps {
+  players: string[];
+  rule: BreakRule;
+  onNext: (first: number, second?: number) => void;
+  onCancel: () => void;
+}
+
+const BreakOrderStep = ({ players, rule, onNext, onCancel }: BreakOrderStepProps) => {
+  const playerCount = players.filter(Boolean).length;
+  const [first, setFirst] = useState<number>(1);
+  const [second, setSecond] = useState<number>(playerCount >= 2 ? 2 : 1);
+
+  const handleFirst = (idx: number) => {
+    setFirst(idx);
+    if (rule === 'wechselbreak' && playerCount === 2) {
+      // second implied
+      onNext(idx);
+    }
+  };
+
+  const handleSecond = (idx: number) => {
+    setSecond(idx);
+    onNext(first, idx);
+  };
+
+  return (
+    <form className={styles['new-game-form']} aria-label="Break-Reihenfolge wählen">
+      <div className={styles['screen-title']}>Neues Spiel – Schritt 5/6</div>
+      <div style={{ marginBottom: 16, fontWeight: 600 }}>Wer bricht zuerst?</div>
+      <div style={{ display: 'flex', gap: 12, flexWrap: 'wrap' }}>
+        {players.filter(Boolean).map((name, idx) => (
+          <button key={`first-${idx}`} type="button" className={styles['quick-pick-btn']} onClick={() => handleFirst(idx + 1)} aria-label={`Zuerst: ${name}`}>{name}</button>
+        ))}
+      </div>
+      {rule === 'wechselbreak' && playerCount === 3 && (
+        <>
+          <div style={{ marginTop: 24, marginBottom: 16, fontWeight: 600 }}>Wer bricht als Zweites?</div>
+          <div style={{ display: 'flex', gap: 12, flexWrap: 'wrap' }}>
+            {players.filter(Boolean).map((name, idx) => (
+              <button key={`second-${idx}`} type="button" className={styles['quick-pick-btn']} onClick={() => handleSecond(idx + 1)} aria-label={`Zweites Break: ${name}`}>{name}</button>
+            ))}
+          </div>
+        </>
+      )}
+      <div className={styles['arrow-nav']} style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginTop: 48 }}>
+        <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>
+      </div>
+    </form>
+  );
+};
+
+export { Player1Step, Player2Step, Player3Step, GameTypeStep, BreakRuleStep, BreakOrderStep, RaceToStep };

src/components/screens/NewGameScreen.tsx

@@ -1,6 +1,6 @@
 import { h } from 'preact';
 import { Screen } from '../ui/Layout';
-import { Player1Step, Player2Step, Player3Step, GameTypeStep, RaceToStep } from '../NewGame';
+import { Player1Step, Player2Step, Player3Step, GameTypeStep, BreakRuleStep, BreakOrderStep, RaceToStep } from '../NewGame';
 import type { NewGameStep, NewGameData } from '../../types/game';
 
 interface NewGameScreenProps {
@@ -44,6 +44,16 @@ export default function NewGameScreen({
       gameType: type as any, // Type assertion for now, could be improved with proper validation
       raceTo: '8'
     });
+    onStepChange('breakRule');
+  };
+
+  const handleBreakRuleNext = (rule: 'winnerbreak' | 'wechselbreak') => {
+    onDataChange({ breakRule: rule });
+    onStepChange('breakOrder');
+  };
+
+  const handleBreakOrderNext = (first: number, second?: number) => {
+    onDataChange({ breakFirst: first, breakSecond: second ?? '' });
     onStepChange('raceTo');
   };
 
@@ -63,9 +73,15 @@ export default function NewGameScreen({
       case 'gameType':
         onStepChange('player3');
         break;
-      case 'raceTo':
+      case 'breakRule':
         onStepChange('gameType');
         break;
+      case 'breakOrder':
+        onStepChange('breakRule');
+        break;
+      case 'raceTo':
+        onStepChange('breakOrder');
+        break;
       default:
         onCancel();
     }
@@ -107,6 +123,23 @@ export default function NewGameScreen({
           initialValue={data.gameType}
         />
       )}
+
+      {step === 'breakRule' && (
+        <BreakRuleStep
+          onNext={handleBreakRuleNext}
+          onCancel={handleStepBack}
+          initialValue={(data.breakRule as any) || 'winnerbreak'}
+        />
+      )}
+
+      {step === 'breakOrder' && (
+        <BreakOrderStep
+          players={[data.player1, data.player2, data.player3]}
+          rule={(data.breakRule as any) || 'winnerbreak'}
+          onNext={handleBreakOrderNext}
+          onCancel={handleStepBack}
+        />
+      )}
       
       {step === 'raceTo' && (
         <RaceToStep

src/services/gameService.ts

@@ -1,4 +1,4 @@
-import type { Game, GameType, StandardGame, EndlosGame, NewGameData } from '../types/game';
+import type { Game, GameType, StandardGame, EndlosGame, NewGameData, BreakRule } from '../types/game';
 import { IndexedDBService } from './indexedDBService';
 
 const LOCAL_STORAGE_KEY = 'bscscore_games';
@@ -163,6 +163,25 @@ export class GameService {
       player2: gameData.player2,
       score1: 0,
       score2: 0,
+      breakRule: (gameData.breakRule as BreakRule) || 'winnerbreak',
+      breakOrder: (() => {
+        // Determine break order from inputs, fallback defaults
+        const players: number[] = [1, 2];
+        if (gameData.player3?.trim()) players.push(3);
+        const first = (typeof gameData.breakFirst === 'number' ? gameData.breakFirst : 1) as number;
+        const second = (typeof gameData.breakSecond === 'number' ? gameData.breakSecond : (players.includes(2) && first !== 2 ? 2 : (players.includes(3) ? 3 : 2))) as number;
+        const order = [first];
+        if (players.length === 2) {
+          order.push(first === 1 ? 2 : 1);
+        } else {
+          // 3 players: add chosen second, then the remaining third
+          order.push(second);
+          const third = [1,2,3].find(p => p !== first && p !== second)!;
+          order.push(third);
+        }
+        return order;
+      })(),
+      currentBreakerIdx: 0,
     };
 
     if (gameData.player3) {
@@ -185,6 +204,23 @@ export class GameService {
       updated.score3 = Math.max(0, updated.score3 + change);
     }
     
+    // Breaker logic
+    if (change > 0) {
+      if ((updated.breakRule || 'winnerbreak') === 'winnerbreak') {
+        // Winner keeps break: set breaker to this player
+        const order = updated.breakOrder || [1,2].concat(updated.score3 !== undefined ? [3] : []);
+        updated.breakOrder = order;
+        const idx = order.findIndex(p => p === player);
+        updated.currentBreakerIdx = idx >= 0 ? idx : 0;
+      } else {
+        // Wechselbreak: rotate to next
+        const order = updated.breakOrder || [1,2].concat(updated.score3 !== undefined ? [3] : []);
+        updated.breakOrder = order;
+        const curr = typeof updated.currentBreakerIdx === 'number' ? updated.currentBreakerIdx : 0;
+        updated.currentBreakerIdx = (curr + 1) % order.length;
+      }
+    }
+
     updated.updatedAt = new Date().toISOString();
     return updated;
   }

src/types/game.ts

@@ -33,6 +33,8 @@ export interface BaseGame {
   lastModified?: number;
 }
 
+export type BreakRule = 'winnerbreak' | 'wechselbreak';
+
 export interface StandardGame extends BaseGame {
   player1: string;
   player2: string;
@@ -40,6 +42,10 @@ export interface StandardGame extends BaseGame {
   score1: number;
   score2: number;
   score3?: number;
+  // Break management
+  breakRule?: BreakRule; // default winnerbreak for backfill
+  breakOrder?: number[]; // 1-based player indices, e.g. [1,2] or [1,2,3]
+  currentBreakerIdx?: number; // index into breakOrder
 }
 
 export interface EndlosGame extends BaseGame {
@@ -58,8 +64,11 @@ export interface NewGameData {
   player3: string;
   gameType: GameType | '';
   raceTo: string;
+  breakRule?: BreakRule | '';
+  breakFirst?: number | '';
+  breakSecond?: number | '';
 }
 
-export type NewGameStep = 'player1' | 'player2' | 'player3' | 'gameType' | 'raceTo' | null;
+export type NewGameStep = 'player1' | 'player2' | 'player3' | 'gameType' | 'breakRule' | 'breakOrder' | 'raceTo' | null;
 
 export type GameFilter = 'all' | 'active' | 'completed';