Refactor MainLayout to use new hooks for flyers and master items; consolidate error handling

Update error handling tests to ensure proper status assignment for errors

src/features/flyer/AnalysisPanel.test.tsx

@@ -171,9 +171,9 @@ describe('AnalysisPanel', () => {
 
   it('should display a specific error for geolocation permission denial', async () => {
     // Mock getCurrentPosition to reject the promise, which is how the component's logic handles errors.
-    (navigator.geolocation.getCurrentPosition as Mocked<any>).mockImplementation(
+    (navigator.geolocation.getCurrentPosition as Mock).mockImplementation(
       (
-        success: (position: GeolocationPosition) => void,
+        _success: (position: GeolocationPosition) => void,
         error: (error: GeolocationPositionError) => void
       ) => {
         // The component wraps this in a Promise, so we call the error callback which causes the promise to reject.