## QA PASSED See QA report document: cd860c40-5fa5-403a-b902-fb981b54041a **Verification Method**: Code Review (browser testing blocked by auth/HMR issues) **Features Verified**: 1. Plus button on rack diagram - Found at top-right with Lucide Plus icon, aria-label for accessibility 2. Plus button opens device creation dialog - Wired to handleCreateDevice in settings page 3. Delete button in device dialog - Red destructive button with Trash2 icon, only shows when editing 4. Delete confirmation dialog - AlertDialog with device name and warning about outlet assignments All code paths verified. Implementation matches requirements exactly.

## Implementation Complete ### Changes Made **1. Added '+' button to DraggableRackDiagram** (`frontend/src/components/draggable-rack-diagram.tsx`): - Added `onAddDevice` callback prop to the component interface - Added a small blue '+' button at the top-right corner of the rack diagram (positioned at y=2, just above the rack) - Button uses the primary color scheme and includes hover effect - Added ARIA label for accessibility **2. Added Delete button with confirmation to DeviceFormDialog** (`frontend/src/components/device-form-dialog.tsx`): - Added `onDelete` callback prop to the component interface - Added AlertDialog import for confirmation dialog - Added 'deleting' state for loading indicator - Added `handleDelete` async function to handle deletion via API - Added red 'Delete' button with Trash2 icon in the dialog footer (left side, away from Save) - Delete button only appears when editing an existing device (`isEditing && onDelete && device`) - Confirmation dialog shows device name and warns about outlet assignments being removed **3. Wired up callbacks in Settings page** (`frontend/src/app/settings/page.tsx`): - Added `onAddDevice={handleCreateDevice}` to DraggableRackDiagram - Added `onDelete={fetchDevicesAndRacks}` to DeviceFormDialog ### Verification - All 111 tests pass - Build completes successfully with no TypeScript errors - No linting warnings related to these changes