fix(tutorial): Maussimulation fuer Toggle-Schieberegler in Schritt 6+7

Cursor bewegt sich jetzt zum sichtbaren Toggle-Switch statt zum
versteckten Checkbox-Input. Klick-Animation (Scale-Pulse) zeigt
die Betaetigung visuell an.

Neue Hilfsmethoden: _clickAtCursor() und _cursorToToggle()

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/static/css/style.css

@@ -5194,6 +5194,15 @@ a.map-popup-article:hover {
 .tutorial-cursor-resize {
     background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M22 22H20V20H22V22ZM22 18H18V22H16V16H22V18ZM18 18V14H22V12H16V18H18ZM14 22H12V16H18V14H10V22H14Z' fill='%23fff' stroke='%23000' stroke-width='0.3'/%3E%3C/svg%3E") no-repeat center/contain;
 }
+.tutorial-cursor.clicking {
+    animation: tutorial-cursor-click 0.3s ease;
+}
+
+@keyframes tutorial-cursor-click {
+    0%   { transform: scale(1); }
+    40%  { transform: scale(0.75); }
+    100% { transform: scale(1); }
+}
 
 /* Chat Tutorial-Hinweis */
 .chat-tutorial-hint {