feat: implement plan approval functionality in board view

- Introduced PlanApprovalDialog for reviewing and approving feature plans.
- Added state management for pending plan approvals and loading states.
- Enhanced BoardView to handle plan approval actions, including approve and reject functionalities.
- Updated KanbanCard and KanbanBoard components to include buttons for viewing and approving plans.
- Integrated plan approval logic into the auto mode service, allowing for user feedback and plan edits.
- Updated app state to manage default plan approval settings and integrate with existing feature workflows.

apps/app/src/components/views/board-view/hooks/use-board-features.ts

@@ -210,6 +210,11 @@ export function useBoardFeatures({ currentProject }: UseBoardFeaturesProps) {
             .play()
             .catch((err) => console.warn("Could not play ding sound:", err));
         }
+      } else if (event.type === "plan_approval_required") {
+        // Reload features when plan is generated and requires approval
+        // This ensures the feature card shows the "Approve Plan" button
+        console.log("[Board] Plan approval required, reloading features...");
+        loadFeatures();
       } else if (event.type === "auto_mode_error") {
         // Reload features when an error occurs (feature moved to waiting_approval)
         console.log(