fix(availability-sync): fix 4K media availability detection (#2298)

server/lib/availabilitySync.ts

@@ -816,6 +816,50 @@ class AvailabilitySync {
           this.plexSeasonsCache[ratingKey4k] =
             await this.plexClient?.getChildrenMetadata(ratingKey4k);
         }
+
+        if (plexMedia) {
+          if (ratingKey === ratingKey4k) {
+            plexMedia = undefined;
+          }
+
+          if (
+            plexMedia &&
+            media.mediaType === 'movie' &&
+            !plexMedia.Media?.some(
+              (mediaItem) => (mediaItem.width ?? 0) >= 2000
+            )
+          ) {
+            plexMedia = undefined;
+          }
+
+          if (plexMedia && media.mediaType === 'tv') {
+            const cachedSeasons = this.plexSeasonsCache[ratingKey4k];
+            if (cachedSeasons?.length) {
+              let has4kInAnySeason = false;
+              for (const season of cachedSeasons) {
+                try {
+                  const episodes = await this.plexClient?.getChildrenMetadata(
+                    season.ratingKey
+                  );
+                  const has4kEpisode = episodes?.some((episode) =>
+                    episode.Media?.some(
+                      (mediaItem) => (mediaItem.width ?? 0) >= 2000
+                    )
+                  );
+                  if (has4kEpisode) {
+                    has4kInAnySeason = true;
+                    break;
+                  }
+                } catch {
+                  // If we can't fetch episodes for a season, continue checking other seasons
+                }
+              }
+              if (!has4kInAnySeason) {
+                plexMedia = undefined;
+              }
+            }
+          }
+        }
       }
 
       if (plexMedia) {