Remove redundant code

hooks/useImageStorage.ts

@@ -1,3 +1,4 @@
+import { File, Paths } from "expo-file-system";
 import { useCallback } from "react";
 import { storage } from "@/utils/mmkv";
 
@@ -12,36 +13,28 @@ const useImageStorage = () => {
     }
   }, []);
 
+  /**
+   * expo-file-system instead of fetch+Blob+FileReader: the latter silently
+   * resolves to an empty payload under RN's New Architecture.
+   */
   const image2Base64 = useCallback(async (url?: string | null) => {
     if (!url) return null;
 
-    let blob: Blob;
+    const tmpFile = new File(
+      Paths.cache,
+      `img-${Date.now()}-${Math.random().toString(36).slice(2)}.jpg`,
+    );
     try {
-      // Fetch the data from the URL
-      const response = await fetch(url);
-      blob = await response.blob();
+      const downloaded = await File.downloadFileAsync(url, tmpFile, {
+        idempotent: true,
+      });
+      return await downloaded.base64();
     } catch (error) {
       console.warn("Error fetching image:", error);
       return null;
+    } finally {
+      if (tmpFile.exists) tmpFile.delete();
     }
-
-    // Create a FileReader instance
-    const reader = new FileReader();
-
-    // Convert blob to base64
-    return new Promise<string>((resolve, reject) => {
-      reader.onloadend = () => {
-        if (typeof reader.result === "string") {
-          // Extract the base64 string (remove the data URL prefix)
-          const base64 = reader.result.split(",")[1];
-          resolve(base64);
-        } else {
-          reject(new Error("Failed to convert image to base64"));
-        }
-      };
-      reader.onerror = reject;
-      reader.readAsDataURL(blob);
-    });
   }, []);
 
   const saveImage = useCallback(

hooks/usePlaybackManager.ts

@@ -109,35 +109,30 @@ export const usePlaybackManager = ({
     staleTime: 0,
   });
 
-  /**
-   * Derive prev/next from the current item's real position in the adjacent
-   * list rather than from the array length. `getEpisodes({ adjacentTo })` does
-   * not guarantee a fixed [prev, current, next] shape — at the first/last
-   * episode it can still return the current item as the first/last entry — so
-   * length-based indexing wrongly surfaces the current episode as "previous".
-   */
-  const currentIndex = useMemo(
-    () => adjacentItems?.findIndex((e) => e.Id === item?.Id) ?? -1,
-    [adjacentItems, item],
-  );
-
-  /** A neighbour is only navigable if it has an actual media file (not a
-   * "Virtual"/missing episode placeholder, e.g. an absent Special). */
-  const isNavigable = (episode?: BaseItemDto | null): episode is BaseItemDto =>
-    !!episode && episode.Id !== item?.Id && episode.LocationType !== "Virtual";
-
   const previousItem = useMemo(() => {
-    if (!adjacentItems || currentIndex <= 0) return null;
-    const candidate = adjacentItems[currentIndex - 1];
-    return isNavigable(candidate) ? candidate : null;
-  }, [adjacentItems, currentIndex, item]);
+    if (!adjacentItems || adjacentItems.length <= 1) {
+      return null;
+    }
+
+    if (adjacentItems.length === 2) {
+      return adjacentItems[0].Id === item?.Id ? null : adjacentItems[0];
+    }
+
+    return adjacentItems[0];
+  }, [adjacentItems, item]);
 
   /** The next item in the series */
   const nextItem = useMemo(() => {
-    if (!adjacentItems || currentIndex < 0) return null;
-    const candidate = adjacentItems[currentIndex + 1];
-    return isNavigable(candidate) ? candidate : null;
-  }, [adjacentItems, currentIndex, item]);
+    if (!adjacentItems || adjacentItems.length <= 1) {
+      return null;
+    }
+
+    if (adjacentItems.length === 2) {
+      return adjacentItems[1].Id === item?.Id ? null : adjacentItems[1];
+    }
+
+    return adjacentItems[2];
+  }, [adjacentItems, item]);
 
   /**
    * Reports playback progress.