fix(workspace): auto-scroll slash command popup when navigating with arrow keys

frontend/src/features/workspace/WorkspaceView.tsx

@@ -128,6 +128,7 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
   const [slashBlockId, setSlashBlockId] = useState<string | null>(null);
   const [slashSearch, setSlashSearch] = useState('');
   const [slashSelectedIndex, setSlashSelectedIndex] = useState(0);
+  const slashMenuRef = useRef<HTMLDivElement | null>(null);
 
   // Drag and Drop reordering state for blocks
   const [draggingBlockId, setDraggingBlockId] = useState<string | null>(null);
@@ -933,6 +934,12 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
     ensureLock();
 
     if (slashBlockId === block.id) {
+      if (filteredSlashCommands.length === 0) {
+        if (e.key === 'Escape') {
+          setSlashBlockId(null);
+        }
+        return;
+      }
       if (e.key === 'ArrowDown') {
         e.preventDefault();
         setSlashSelectedIndex((prev) => (prev + 1) % filteredSlashCommands.length);
@@ -1010,6 +1017,27 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
     );
   }, [slashSearch]);
 
+  useEffect(() => {
+    if (slashBlockId && slashMenuRef.current) {
+      const container = slashMenuRef.current;
+      const activeBtn = container.querySelector<HTMLElement>(
+        `[data-slash-index="${slashSelectedIndex}"]`
+      );
+      if (activeBtn) {
+        const itemTop = activeBtn.offsetTop;
+        const itemBottom = itemTop + activeBtn.offsetHeight;
+        const containerTop = container.scrollTop;
+        const containerBottom = containerTop + container.clientHeight;
+
+        if (itemTop < containerTop) {
+          container.scrollTop = itemTop;
+        } else if (itemBottom > containerBottom) {
+          container.scrollTop = itemBottom - container.clientHeight;
+        }
+      }
+    }
+  }, [slashSelectedIndex, slashBlockId]);
+
   const applySlashCommand = (blockId: string, type: BlockType) => {
     if (isReadOnly || !selectedDoc) return;
     const block = selectedDoc.blocks.find((b) => b.id === blockId);
@@ -2431,11 +2459,12 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
                               <div className="px-2 py-1 text-[10px] text-faint font-semibold uppercase tracking-wider border-b border-border">
                                 Block-Typ wählen:
                               </div>
-                              <div className="max-h-48 overflow-y-auto space-y-0.5">
+                              <div ref={slashMenuRef} className="relative max-h-48 overflow-y-auto space-y-0.5">
                                 {filteredSlashCommands.map((cmd, idx) => (
                                   <button
                                     key={cmd.type}
                                     type="button"
+                                    data-slash-index={idx}
                                     onMouseDown={(e) => e.preventDefault()}
                                     onClick={() => applySlashCommand(block.id, cmd.type)}
                                     className={`w-full text-left px-2 py-1.5 rounded-btn text-xs flex items-center justify-between transition-colors ${