Hinzufügen von Security.md, license, Disclaimer und beheben von möglichen Copyright Problemen, bilder ausgetauscht und in readme behoben

src/js/settings.js

@@ -33,7 +33,7 @@ function applySettings() {
   const showSearchEl = document.getElementById('settingShowSearch');
   if (showSearchEl) showSearchEl.checked = settings.showSearch;
 
-  applyTheme(settings.theme || 'astronaut', !!settings.bgUrl);
+  applyTheme(settings.theme || 'nebula', !!settings.bgUrl);
 
   if (settings.bgUrl) {
     document.getElementById('bgLayer').style.backgroundImage = `url('${settings.bgUrl}')`;
@@ -129,7 +129,7 @@ function bindSettingsEvents() {
     if (!confirm('Wirklich alle Boards und Einstellungen löschen? Nicht rückgängig machbar.')) return;
     boards   = [];
     settings = { compact: false, shortenTitles: false, newTab: true, showDesc: false,
-                 hideExtra: false, visibleCount: 10, bgUrl: '', theme: 'astronaut',
+                 hideExtra: false, visibleCount: 10, bgUrl: '', theme: 'nebula',
                  showSearch: true, searchEngine: 'google' };
     await saveBoards();
     await saveSettings();

src/js/state.js

@@ -13,7 +13,7 @@ let settings = {
   hideExtra:     false,
   visibleCount:  10,
   bgUrl:         '',
-  theme:         'astronaut',
+  theme:         'nebula',
   showSearch:    true,
   searchEngine:  'google'
 };

src/js/themes.js

@@ -4,9 +4,9 @@
    ============================================= */
 
 const THEMES = {
-  'astronaut':      { bg: 'assets/themes/bg-astronaut.jpg' },
-  'cosmic-clock':   { bg: 'assets/themes/bg-cosmic-clock.jpg' },
-  'void-mage':      { bg: 'assets/themes/bg-void-mage.jpg' },
+  'nebula':          { bg: 'assets/themes/bg-nebula.jpg' },
+  'crescent':        { bg: 'assets/themes/bg-crescent.jpg' },
+  'event-horizon':   { bg: 'assets/themes/bg-event-horizon.jpg' },
   'merchantman':    { bg: 'assets/themes/bg-merchantman.webp' },
   'julia-jin':      { bg: 'assets/themes/bg-julia-jin.png' },
   'sc-sunset':      { bg: 'assets/themes/bg-sc-sunset.jpg' },