a11y(theme-picker): Cards als role=button mit tabindex, Enter/Space-Handler und gepflegtem aria-pressed

newtab.html

@@ -297,57 +297,57 @@
         <button class="btn-close" id="btnCloseTheme" data-i18n-title="dialog.close">✕</button>
       </div>
       <div class="theme-grid">
-        <div class="theme-card active" data-value="nebula">
+        <div class="theme-card active" data-value="nebula" role="button" tabindex="0" aria-pressed="true" data-i18n-aria-label="theme.card.nebula">
           <img class="theme-card-img" src="assets/themes/bg-nebula.webp" alt="Nebula" />
           <span class="theme-card-label">Nebula</span>
           <span class="theme-card-check">✓</span>
         </div>
-        <div class="theme-card" data-value="crescent">
+        <div class="theme-card" data-value="crescent" role="button" tabindex="0" aria-pressed="false" data-i18n-aria-label="theme.card.crescent">
           <img class="theme-card-img" src="assets/themes/bg-crescent.webp" alt="Crescent" />
           <span class="theme-card-label">Crescent</span>
           <span class="theme-card-check">✓</span>
         </div>
-        <div class="theme-card" data-value="event-horizon">
+        <div class="theme-card" data-value="event-horizon" role="button" tabindex="0" aria-pressed="false" data-i18n-aria-label="theme.card.event_horizon">
           <img class="theme-card-img" src="assets/themes/bg-event-horizon.webp" alt="Event Horizon" />
           <span class="theme-card-label">Event Horizon</span>
           <span class="theme-card-check">✓</span>
         </div>
-        <div class="theme-card" data-value="merchantman">
+        <div class="theme-card" data-value="merchantman" role="button" tabindex="0" aria-pressed="false" data-i18n-aria-label="theme.card.merchantman">
           <img class="theme-card-img" src="assets/themes/bg-merchantman.webp" alt="Merchantman" />
           <span class="theme-card-label">Merchantman</span>
           <span class="theme-card-check">✓</span>
         </div>
-        <div class="theme-card" data-value="julia-jin">
+        <div class="theme-card" data-value="julia-jin" role="button" tabindex="0" aria-pressed="false" data-i18n-aria-label="theme.card.julia_jin">
           <img class="theme-card-img" src="assets/themes/bg-julia-jin.webp" alt="Julia &amp; Jin" />
           <span class="theme-card-label">Julia &amp; Jin</span>
           <span class="theme-card-check">✓</span>
         </div>
-        <div class="theme-card" data-value="sc-sunset">
+        <div class="theme-card" data-value="sc-sunset" role="button" tabindex="0" aria-pressed="false" data-i18n-aria-label="theme.card.sc_sunset">
           <img class="theme-card-img" src="assets/themes/bg-sc-sunset.webp" alt="SC Sunset" />
           <span class="theme-card-label">SC Sunset</span>
           <span class="theme-card-check">✓</span>
         </div>
-        <div class="theme-card" data-value="hellion-hud">
+        <div class="theme-card" data-value="hellion-hud" role="button" tabindex="0" aria-pressed="false" data-i18n-aria-label="theme.card.hellion_hud">
           <img class="theme-card-img" src="assets/themes/bg-hellion-hud.webp" alt="Hellion HUD" />
           <span class="theme-card-label">HUD</span>
           <span class="theme-card-check">✓</span>
         </div>
-        <div class="theme-card" data-value="hellion-energy">
+        <div class="theme-card" data-value="hellion-energy" role="button" tabindex="0" aria-pressed="false" data-i18n-aria-label="theme.card.hellion_energy">
           <img class="theme-card-img" src="assets/themes/bg-hellion-energy.webp" alt="Hellion Energy" />
           <span class="theme-card-label">Energy</span>
           <span class="theme-card-check">✓</span>
         </div>
-        <div class="theme-card" data-value="satisfactory">
+        <div class="theme-card" data-value="satisfactory" role="button" tabindex="0" aria-pressed="false" data-i18n-aria-label="theme.card.satisfactory">
           <img class="theme-card-img" src="assets/themes/bg-satisfactory.webp" alt="Satisfactory" />
           <span class="theme-card-label">Satisfactory</span>
           <span class="theme-card-check">✓</span>
         </div>
-        <div class="theme-card" data-value="avorion">
+        <div class="theme-card" data-value="avorion" role="button" tabindex="0" aria-pressed="false" data-i18n-aria-label="theme.card.avorion">
           <img class="theme-card-img" src="assets/themes/bg-avorion.webp" alt="Avorion" />
           <span class="theme-card-label">Avorion</span>
           <span class="theme-card-check">✓</span>
         </div>
-        <div class="theme-card" data-value="hellion-stealth">
+        <div class="theme-card" data-value="hellion-stealth" role="button" tabindex="0" aria-pressed="false" data-i18n-aria-label="theme.card.hellion_stealth">
           <img class="theme-card-img" src="assets/themes/bg-scPolaris.webp" alt="Hellion Stealth" />
           <span class="theme-card-label">Stealth</span>
           <span class="theme-card-check">✓</span>

src/js/settings.js

@@ -199,15 +199,25 @@ function bindSettingsEvents() {
   });
 
   // Theme-Picker (Cards im Theme-Modal)
-  document.querySelectorAll('.theme-card').forEach(card => {
+  const themeCards = document.querySelectorAll('.theme-card');
-    card.addEventListener('click', async () => {
+  function selectThemeCard(card) {
     const name = card.dataset.value;
-      if (!name || name === settings.theme) return;
+    if (!name || name === settings.theme) return Promise.resolve();
     settings.theme  = name;
     settings.bgUrl  = '';
     document.getElementById('bgUrlInput').value = '';
-      switchTheme(name);
+    // aria-pressed synchron halten — applyTheme/switchTheme pflegt nur die .active-Klasse, nicht ARIA
-      await saveSettings();
+    themeCards.forEach(c => c.setAttribute('aria-pressed', c === card ? 'true' : 'false'));
+    switchTheme(name); // WICHTIG: switchTheme aus Phase 4 (View-Transition-Wrapper), NICHT applyTheme direkt — sonst geht der Theme-Fade verloren
+    return saveSettings();
+  }
+  themeCards.forEach(card => {
+    card.addEventListener('click', () => selectThemeCard(card));
+    card.addEventListener('keydown', e => {
+      if (e.key === 'Enter' || e.key === ' ') {
+        e.preventDefault();
+        selectThemeCard(card);
+      }
     });
   });