feat: Allow drag-to-create dependencies between any non-completed features (#656)

* feat: Allow drag-to-create dependencies between any non-completed features

Previously, the card drag-to-create-dependency feature only worked between
backlog features. This expands the functionality to allow creating dependency
links between features in any status (except completed).

Changes:
- Make all non-completed cards droppable for dependency linking
- Update drag-drop hook to allow links between any status
- Add status badges to the dependency link dialog for better context

* refactor: use barrel export for StatusBadge import

---------

Co-authored-by: Claude <noreply@anthropic.com>

apps/ui/src/components/views/board-view/hooks/use-board-drag-drop.ts

@@ -88,10 +88,10 @@ export function useBoardDragDrop({
           const targetFeature = features.find((f) => f.id === targetFeatureId);
           if (!targetFeature) return;
 
-          // Only allow linking backlog features (both must be in backlog)
-          if (draggedFeature.status !== 'backlog' || targetFeature.status !== 'backlog') {
+          // Don't allow linking completed features (they're already done)
+          if (draggedFeature.status === 'completed' || targetFeature.status === 'completed') {
             toast.error('Cannot link features', {
-              description: 'Both features must be in the backlog to create a dependency link.',
+              description: 'Completed features cannot be linked.',
             });
             return;
           }