feat(workspace): recursive folder tree, link modal redesign, todo grouping & line jumping, hashtag child listing

frontend/src/features/workspace/OutlinerTree.tsx

@@ -18,6 +18,7 @@ export interface OutlinerTreeProps {
   onMoveBlock: (blockId: string, newIndex: number, level?: number) => void;
   onTagClick?: (tag: string) => void;
   onWikiLinkClick?: (pageTitle: string) => void;
+  initialFocusedBlockId?: string | null;
 }
 
 export const OutlinerTree: React.FC<OutlinerTreeProps> = ({
@@ -34,14 +35,38 @@ export const OutlinerTree: React.FC<OutlinerTreeProps> = ({
   onMoveBlock,
   onTagClick,
   onWikiLinkClick,
+  initialFocusedBlockId,
 }) => {
   const [focusedBlockId, setFocusedBlockId] = useState<string | null>(null);
+  const [highlightedBlockId, setHighlightedBlockId] = useState<string | null>(
+    initialFocusedBlockId || null
+  );
   const [draggedIndex, setDraggedIndex] = useState<number | null>(null);
   const [dragOverIndex, setDragOverIndex] = useState<number | null>(null);
 
   const textareaMapRef = useRef<Map<string, HTMLTextAreaElement>>(new Map());
   const pendingFocusRef = useRef<{ blockId: string; cursor: 'start' | 'end' } | null>(null);
 
+  useEffect(() => {
+    if (initialFocusedBlockId) {
+      setHighlightedBlockId(initialFocusedBlockId);
+      const timer = setTimeout(() => {
+        focusBlockInput(initialFocusedBlockId, 'end');
+        const el = textareaMapRef.current.get(initialFocusedBlockId);
+        if (el) {
+          el.scrollIntoView({ behavior: 'smooth', block: 'center' });
+        }
+      }, 80);
+      const fadeTimer = setTimeout(() => {
+        setHighlightedBlockId(null);
+      }, 2500);
+      return () => {
+        clearTimeout(timer);
+        clearTimeout(fadeTimer);
+      };
+    }
+  }, [initialFocusedBlockId]);
+
   const registerTextareaRef = useCallback((blockId: string, el: HTMLTextAreaElement | null) => {
     if (el) {
       textareaMapRef.current.set(blockId, el);
@@ -304,6 +329,7 @@ export const OutlinerTree: React.FC<OutlinerTreeProps> = ({
           onDragOverBlock={handleDragOverBlock}
           onDropBlock={handleDropBlock}
           isDragTarget={dragOverIndex === index && draggedIndex !== index}
+          isTargeted={highlightedBlockId === block.id}
           registerTextareaRef={registerTextareaRef}
         />
       ))}