feat(FN-1209): add quick entry image attachment flow

- Return the created task from board quick create and propagate the onQuickCreate return type through board/list components
- Add pending image handling in QuickEntryBox with paste support, hidden file input, and an Attach action in the menu
- Render removable pending image previews, include image count in the actions badge, and clean up object URLs on reset/unmount
- Upload pending images after task creation with error toasts for failed uploads, and extend tests for attachment and quick-create behavior

packages/dashboard/app/hooks/useTaskHandlers.ts

@@ -11,7 +11,7 @@ interface UseTaskHandlersOptions {
 }
 
 export interface UseTaskHandlersResult {
-  handleBoardQuickCreate: (input: TaskCreateInput) => Promise<void>;
+  handleBoardQuickCreate: (input: TaskCreateInput) => Promise<Task>;
   handleModalCreate: (input: TaskCreateInput) => Promise<Task>;
   handlePlanningTaskCreated: (task: Task) => void;
   handlePlanningTasksCreated: (tasks: Task[]) => void;
@@ -29,8 +29,8 @@ export function useTaskHandlers(options: UseTaskHandlersOptions): UseTaskHandler
   } = options;
 
   const handleBoardQuickCreate = useCallback(
-    async (input: TaskCreateInput): Promise<void> => {
-      await createTask({ ...input, column: "triage" });
+    async (input: TaskCreateInput): Promise<Task> => {
+      return createTask({ ...input, column: "triage" });
     },
     [createTask],
   );