fix: refactor to adhere baseUrl

Author: benjamsf

src/pages/index.mdx

@@ -1,5 +1,6 @@
 import React from 'react';
 import TileGrid from '@site/src/components/TileGrid';
+import SlideDeck from '@site/src/components/SlideDeck';
 import {useOS}  from '@site/src/context/OSContext';
 
 export const Tiles = () => {
@@ -41,15 +42,8 @@ Tools that Deploy App offers right now. More to come.
 ## Basic Deploy App flow
 Not willing to go through all the docs? This is how it works.
 
-<div className="reveal-wrapper" style={{height:'600px'}}>
-  <iframe
-    src="/decks/en/intro/"
-    title="Deploy App Slides"
-    allow="fullscreen; autoplay; clipboard-write"
-    width="100%"
-    height="100%"
-    style={{border:0}}
-  />
+<div className="reveal-wrapper" style={{ height: '600px' }}>
+  <SlideDeck deckPath="intro" height={600} />
 </div>
 
 ### In a nutshell

src/theme/NavbarItem/CustomPlatformChooser.tsx

@@ -1,5 +1,6 @@
 import React from 'react';
 import DropdownNavbarItem from '@theme/NavbarItem/DropdownNavbarItem';
+import useBaseUrl from '@docusaurus/useBaseUrl';
 import {useOS} from '@site/src/context/OSContext';
 import {useHistory, useLocation} from '@docusaurus/router';
 
@@ -28,20 +29,17 @@ function useChangeOS() {
 
     const {pathname} = location;
 
-    // ➜ 1. Stay put on the landing page
     if (pathname === '/') return;
-
-    // ➜ 2. Do not redirect anything under /docs/dev
     if (pathname.startsWith('/docs/dev')) return;
 
-    // ➜ 3. Replace existing platform segment if present
     const match = pathname.match(/^\/docs\/(android|ios|windows)(\/.*)?$/);
     if (match) {
       const [, , rest = ''] = match;
-      history.replace(`/docs/${nextOS}${rest}`);
+      const newUrl = useBaseUrl(`/docs/${nextOS}${rest}`);
+      history.replace(newUrl);
     } else {
-      // otherwise send them to the Deploy App entry page
-      history.replace(`/docs/${nextOS}/deployapp/home`);
+      const fallbackUrl = useBaseUrl(`/docs/${nextOS}/deployapp/home`);
+      history.replace(fallbackUrl);
     }
   };
 }