test(playwright): add tablet landscape viewport and remove mobile small

The mobile small viewport was removed as it's no longer needed for testing, while tablet landscape was added to improve test coverage for tablet devices

Author: Onibenjo

tests/playwright/helpers/navigation-helpers.ts

@@ -22,10 +22,9 @@ export interface ViewportSize {
 export const VIEWPORTS: ViewportSize[] = [
   { width: 1920, height: 1080, name: "Desktop Large" },
   { width: 1681, height: 768, name: "Desktop Standard" },
+  { width: 1036, height: 620, name: "Tablet Landscape" },
   { width: 620, height: 1024, name: "Tablet Portrait" },
-  { width: 1024, height: 620, name: "Tablet Landscape" },
   { width: 460, height: 667, name: "Mobile" },
-  { width: 320, height: 568, name: "Mobile Small" }
 ];
 
 // Primary navigation items based on navigation.yaml analysis