feat(workspace): bullet action bubble only while the mouse moves

With a real pointer the bubble (zoom, extract, delete, to-do menu, type)
shows while the mouse moves over the row and for a second after; it
stays while the mouse rests on it, its to-do menu is open or a button
in it has keyboard focus. A resting mouse, also while typing, no longer
leaves it over the text. Touch devices keep showing it at the focused
bullet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/features/workspace/OutlinerBlock.tsx

@@ -67,6 +67,9 @@ function slashRank(c: SlashCommand, q: string): number {
   return 4;
 }
 
+// How long the action bubble stays after the last mouse move over a bullet
+const BUBBLE_IDLE_MS = 1000;
+
 const SLASH_COMMANDS: SlashCommand[] = [
   { type: 'todo', label: '/todo', desc: 'Aufgabe mit Checkbox', icon: <ListTodo className="w-3.5 h-3.5" /> },
   { type: 'numbered', label: '/number', desc: 'Nummerierte Liste (1., a., i.)', icon: <ListOrdered className="w-3.5 h-3.5" />, aliases: ['nummer', 'liste', 'ol'] },
@@ -209,6 +212,28 @@ export const OutlinerBlock: React.FC<OutlinerBlockProps> = ({
   const [showLinkModal, setShowLinkModal] = useState<boolean>(false);
   const [showTodoMenu, setShowTodoMenu] = useState<boolean>(false);
 
+  // Action bubble with a real pointer: shown only while the mouse moves over the row (until a moment after
+  // the last move), while it rests on the bubble or a menu of it is open; a resting mouse must not leave it
+  // over the text. Touch devices keep showing it at the focused bullet.
+  const hasHover = useMemo(() => typeof window !== 'undefined' && !!window.matchMedia?.('(hover: hover)').matches, []);
+  const [pointerMoving, setPointerMoving] = useState(false);
+  const [pointerOnBubble, setPointerOnBubble] = useState(false);
+  const pointerIdleTimerRef = useRef<number | null>(null);
+  const handleRowMouseMove = () => {
+    if (!hasHover) return;
+    setPointerMoving(true);
+    if (pointerIdleTimerRef.current !== null) window.clearTimeout(pointerIdleTimerRef.current);
+    pointerIdleTimerRef.current = window.setTimeout(() => setPointerMoving(false), BUBBLE_IDLE_MS);
+  };
+  const handleRowMouseLeave = () => {
+    if (pointerIdleTimerRef.current !== null) window.clearTimeout(pointerIdleTimerRef.current);
+    pointerIdleTimerRef.current = null;
+    setPointerMoving(false);
+  };
+  useEffect(() => () => {
+    if (pointerIdleTimerRef.current !== null) window.clearTimeout(pointerIdleTimerRef.current);
+  }, []);
+
   const textareaRef = useRef<HTMLTextAreaElement | null>(null);
   const debounceTimerRef = useRef<number | null>(null);
   const latestBlockRef = useRef<DocumentBlock>(block);
@@ -1087,9 +1112,13 @@ export const OutlinerBlock: React.FC<OutlinerBlockProps> = ({
   const isEmpty = (!localContent || localContent.trim() === '') && !hasChildren;
 
 
+  const showBubble = hasHover ? pointerMoving || pointerOnBubble || showTodoMenu : activeFocus;
+
   return (
     <div
       data-outline-block={block.id}
+      onMouseMove={handleRowMouseMove}
+      onMouseLeave={handleRowMouseLeave}
       className={`group relative flex items-start gap-1 py-1 px-0.5 sm:px-1.5 rounded-card transition-all duration-300 ${
         inRangeSelection ? 'bg-accent/15' : ''
       } ${
@@ -1595,11 +1624,13 @@ export const OutlinerBlock: React.FC<OutlinerBlockProps> = ({
 
       {/* Floating Actions Overlay Bubble (Zoom, Auslagern, Löschen, TODO-Menü, Text-Umwandlung) */}
       <div
+        onMouseEnter={() => setPointerOnBubble(true)}
+        onMouseLeave={() => setPointerOnBubble(false)}
         className={`absolute right-1 sm:right-2 top-0.5 sm:top-1 z-20 bg-panel/90 backdrop-blur-sm border border-border shadow-xs rounded-pill px-1 sm:px-1.5 py-0.5 flex items-center gap-0.5 sm:gap-1 transition-opacity ${
-          activeFocus
+          showBubble
             ? 'opacity-100 pointer-events-auto'
-            : // Hover only with a real pointer: a tap on a phone would make the invisible buttons clickable
-              'opacity-0 [@media(hover:hover)]:group-hover:opacity-100 focus-within:opacity-100 pointer-events-none [@media(hover:hover)]:group-hover:pointer-events-auto focus-within:pointer-events-auto'
+            : // Hidden buttons must not take clicks; keyboard focus inside still shows it
+              'opacity-0 pointer-events-none focus-within:opacity-100 focus-within:pointer-events-auto'
         }`}
       >
         {/* Convert back to bullet for headings, callouts, dividers, code and numbered items */}