fix(mobile): enhance Recommendations component with empty state message

- Added a conditional rendering for the Recommendations component to display a message when no data is available.
- The new message informs users that the recommendations section is currently empty, improving user experience.

These changes provide clearer feedback to users when there are no recommendations to display.

Signed-off-by: Innei <tukon479@gmail.com>

apps/mobile/src/modules/discover/Recommendations.tsx

@@ -137,6 +137,7 @@ export const RecommendationTab: TabComponent<{
     if (!data) {
       return []
     }
+
     return Object.keys(data).sort((a, b) => {
       const aname = data[a]!.name
       const bname = data[b]!.name
@@ -226,6 +227,14 @@ export const RecommendationTab: TabComponent<{
     return <PlatformActivityIndicator className="flex-1 items-center justify-center" />
   }
 
+  if (keys.length === 0) {
+    return (
+      <View className="flex-1 items-center justify-center">
+        <Text className="text-secondary-label">This is a barren wasteland of knowledge.</Text>
+      </View>
+    )
+  }
+
   return (
     <View className="bg-system-background flex-1" {...rest}>
       <FlashList