Fix: PlatformSelector key collision and add unique key to default guide

Co-authored-by: shannon.anahata <[email protected]>

Author: cursoragent

src/components/platformSelector/index.tsx

@@ -84,15 +84,14 @@ export function PlatformSelector({
     });
     // Radix Select does not work if we don't render the selected item, so we
     // make sure to include it in the list of matches.
-    // Match by both key AND type to handle key collisions (e.g., javascript platform vs guide)
     const selectedPlatform = platformsAndGuides.find(
-      lang => lang.key === currentPlatformKey && lang.type === currentPlatform?.type
+      lang => lang.key === currentPlatformKey
     );
     if (selectedPlatform && !matches_.includes(selectedPlatform)) {
       matches_.push(selectedPlatform);
     }
     return matches_;
-  }, [searchValue, currentPlatformKey, platformsAndGuides, currentPlatform?.type]);
+  }, [searchValue, currentPlatformKey, platformsAndGuides]);
 
   const router = useRouter();
   const onPlatformChange = (platformKey: string) => {

src/docTree.ts

@@ -376,7 +376,7 @@ function extractGuides(platformNode: DocNode): PlatformGuide[] {
   const defaultGuide = platformNode.frontmatter.platformTitle
     ? {
         ...nodeToGuide(platformNode.slug, platformNode),
-        key: platformNode.slug,
+        key: `${platformNode.slug}-platform`,
       }
     : undefined;