fix(workspace): fix outliner cursor focus, enhanced task linking, nav order and Hauptebene drop zone

frontend/src/features/workspace/WorkspaceView.tsx

@@ -57,6 +57,7 @@ interface WorkspaceViewProps {
   initialDocId?: string | null;
   initialBlockId?: string | null;
   onStatsChange: () => void;
+  onOpenTask?: (taskId: string) => void;
 }
 
 type WorkspaceSubView = 'editor' | 'tag_detail' | 'todos' | 'tags';
@@ -274,6 +275,7 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
   initialDocId,
   initialBlockId,
   onStatsChange,
+  onOpenTask,
 }) => {
   const [docs, setDocs] = useState<Document[]>([]);
   const [folders, setFolders] = useState<string[]>([]);
@@ -1315,21 +1317,6 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
 
         {/* Scrollable Navigation Tree */}
         <div className="flex-1 overflow-y-auto p-2 space-y-3">
-          {/* Top drop target for moving to root */}
-          {(draggingDocId || draggingFolderPath) && (
-            <div
-              onDragOver={(e) => {
-                e.preventDefault();
-                setDragOverFolder('__root_top__');
-              }}
-              onDragLeave={() => setDragOverFolder(null)}
-              onDrop={(e) => handleDropOnFolder('', e)}
-              className={`h-2.5 -mx-1 my-0.5 rounded transition-all ${
-                dragOverFolder === '__root_top__' ? 'bg-accent/40 ring-1 ring-accent h-4' : 'opacity-0'
-              }`}
-            />
-          )}
-
           {/* Pinned Notes */}
           {pinnedDocs.length > 0 && !searchQuery && (
             <div>
@@ -1447,10 +1434,14 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
               }}
               onDragLeave={() => setDragOverFolder(null)}
               onDrop={(e) => handleDropOnFolder('', e)}
-              className={`min-h-[2.5rem] flex-1 rounded transition-all ${
-                dragOverFolder === '__root_bottom__' ? 'bg-accent/20 ring-1 ring-accent' : ''
+              className={`p-3 rounded-card border-2 border-dashed transition-all flex items-center justify-center text-xs font-medium text-center ${
+                dragOverFolder === '__root_bottom__'
+                  ? 'border-accent bg-accent/20 text-accent ring-2 ring-accent/30'
+                  : 'border-border/60 bg-panel-elevated/40 text-muted hover:border-accent/40'
               }`}
-            />
+            >
+              <span>Auf Hauptebene verschieben</span>
+            </div>
           )}
 
           {/* Tags Explorer */}
@@ -1502,6 +1493,7 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
             onSelectTag={handleSelectTag}
             onWikiLinkClick={handleWikiLinkClick}
             onBackMobile={() => setMobileShowDetail(false)}
+            onOpenTask={onOpenTask}
             onSaveStatusChange={(status, err) => {
               setDocSaveStatus(status);
               setDocSaveError(err || null);