fix image saving + new icon

src/components/FlyerCorrectionTool.test.tsx

@@ -45,7 +45,7 @@ describe('FlyerCorrectionTool', () => {
         } as unknown as CanvasRenderingContext2D;
       }
       return null;
-    }) as any;
+    }) as typeof window.HTMLCanvasElement.prototype.getContext;
   });
 
   it('should not render when isOpen is false', () => {