feat: complete wizard navigation for all steps

- Adds forward navigation arrows to the 'Game Type' and 'Race To' steps in the new game wizard.
- Unifies navigation logic across all five steps.
- Users can now review their selections before proceeding.

Closes #11

src/components/NewGame.jsx

@@ -438,14 +438,22 @@ const Player3Step = ({ playerNameHistory, onNext, onCancel, initialValue = '' })
  * @returns {import('preact').VNode}
  */
 const GameTypeStep = ({ onNext, onCancel, initialValue = '' }) => {
+  const [gameType, setGameType] = useState(initialValue);
   const gameTypes = ['8-Ball', '9-Ball', '10-Ball', '14/1 endlos'];
 
-  const handleSelect = (gameType) => {
-    onNext(gameType);
+  const handleSelect = (selectedType) => {
+    setGameType(selectedType);
+  };
+
+  const handleSubmit = (e) => {
+    e.preventDefault();
+    if (gameType) {
+      onNext(gameType);
+    }
   };
 
   return (
-    <div className={styles['new-game-form']} aria-label="Spielart auswählen">
+    <form className={styles['new-game-form']} onSubmit={handleSubmit} aria-label="Spielart auswählen">
       <div className={styles['screen-title']}>Neues Spiel – Schritt 4/5</div>
       <div className={styles['progress-indicator']} style={{ marginBottom: 24 }}>
         <span className={styles['progress-dot']} />
@@ -459,7 +467,7 @@ const GameTypeStep = ({ onNext, onCancel, initialValue = '' }) => {
           <button
             key={type}
             type="button"
-            className={`${styles['game-type-btn']} ${initialValue === type ? styles.selected : ''}`}
+            className={`${styles['game-type-btn']} ${gameType === type ? styles.selected : ''}`}
             onClick={() => handleSelect(type)}
           >
             {type}
@@ -474,12 +482,32 @@ const GameTypeStep = ({ onNext, onCancel, initialValue = '' }) => {
           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' }}
         >
+          {/* Unicode left arrow */}
           &#8592;
         </button>
-        {/* No "weiter" arrow, selection proceeds automatically */}
-        <div style={{ width: 80 }} /> {/* Placeholder to balance the flex container */}
+        <button
+          type="submit"
+          className={styles['arrow-btn']}
+          aria-label="Weiter"
+          disabled={!gameType}
+          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',
+            opacity: !gameType ? 0.5 : 1,
+          }}
+        >
+          {/* Unicode right arrow */}
+          &#8594;
+        </button>
       </div>
-    </div>
+    </form>
   );
 };
 
@@ -492,24 +520,24 @@ const GameTypeStep = ({ onNext, onCancel, initialValue = '' }) => {
  * @returns {import('preact').VNode}
  */
 const RaceToStep = ({ onNext, onCancel, initialValue = '' }) => {
-  const [currentValue, setCurrentValue] = useState(initialValue);
+  const [raceTo, setRaceTo] = useState(initialValue);
   const quickPicks = [1, 2, 3, 4, 5, 6, 7, 8, 9];
 
   const handleQuickPick = (value) => {
-    onNext(value);
+    setRaceTo(value);
   };
 
   const handleInputChange = (e) => {
-    setCurrentValue(e.target.value);
+    setRaceTo(e.target.value);
   };
 
-  const handleCustomSubmit = (e) => {
+  const handleSubmit = (e) => {
     e.preventDefault();
-    onNext(parseInt(currentValue, 10) || 0);
+    onNext(parseInt(raceTo, 10) || 0);
   };
 
   return (
-    <form className={styles['new-game-form']} onSubmit={handleCustomSubmit} aria-label="Race To auswählen">
+    <form className={styles['new-game-form']} onSubmit={handleSubmit} aria-label="Race To auswählen">
       <div className={styles['screen-title']}>Neues Spiel – Schritt 5/5</div>
       <div className={styles['progress-indicator']} style={{ marginBottom: 24 }}>
         <span className={styles['progress-dot']} />
@@ -521,7 +549,7 @@ const RaceToStep = ({ onNext, onCancel, initialValue = '' }) => {
       <div className={styles['endlos-container']}>
         <button
           type="button"
-          className={`${styles['race-to-btn']} ${styles['endlos-btn']} ${initialValue === 0 ? styles.selected : ''}`}
+          className={`${styles['race-to-btn']} ${styles['endlos-btn']} ${raceTo === 0 ? styles.selected : ''}`}
           onClick={() => handleQuickPick(0)}
         >
           Endlos
@@ -532,7 +560,7 @@ const RaceToStep = ({ onNext, onCancel, initialValue = '' }) => {
           <button
             key={value}
             type="button"
-            className={`${styles['race-to-btn']} ${parseInt(initialValue, 10) === value ? styles.selected : ''}`}
+            className={`${styles['race-to-btn']} ${parseInt(raceTo, 10) === value ? styles.selected : ''}`}
             onClick={() => handleQuickPick(value)}
           >
             {value}
@@ -543,12 +571,11 @@ const RaceToStep = ({ onNext, onCancel, initialValue = '' }) => {
         <input
           type="number"
           pattern="[0-9]*"
-          value={currentValue}
+          value={raceTo}
           onInput={handleInputChange}
           className={styles['name-input']}
           placeholder="manuelle Eingabe"
         />
-        <button type="submit" className={styles['arrow-btn']} aria-label="Bestätigen">&#10003;</button>
       </div>
       <div className={styles['arrow-nav']} style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginTop: 48 }}>
         <button
@@ -556,10 +583,20 @@ const RaceToStep = ({ onNext, onCancel, initialValue = '' }) => {
           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' }}
         >
+          {/* Unicode left arrow */}
           &#8592;
         </button>
-        <div style={{ width: 80 }} />
+        <button
+          type="submit"
+          className={styles['arrow-btn']}
+          aria-label="Fertigstellen"
+          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' }}
+        >
+          {/* Unicode checkmark */}
+          &#10003;
+        </button>
       </div>
     </form>
   );