fix: Update null check in PhotoViewerClient component for improved type safety

This commit modifies the null check in the `PhotoViewerClient` component to use `!=` instead of `!==`, ensuring that the filter correctly identifies non-null persons. This change enhances type safety and maintains consistency in handling potential null values.

viewer-frontend/components/PhotoViewerClient.tsx

@@ -1075,7 +1075,7 @@ export function PhotoViewerClient({
 
   const peopleNames = (currentPhoto as any).faces
     ?.map((face: any) => face.Person)
-    .filter((person: any): person is Person => person !== null)
+    .filter((person: any): person is Person => person != null)
     .map((person: Person) => `${person.first_name} ${person.last_name}`.trim()) || [];
 
   const tags = (currentPhoto as any).PhotoTagLinkage?.map((pt: any) => pt.Tag.tag_name) || [];