fix: artwork cache never throws on body/disk failures

server/test/artwork.test.ts

@@ -75,4 +75,20 @@ describe('cacheArtwork', () => {
       rmSync(dir, { recursive: true, force: true })
     }
   })
+
+  it('returns null when the response body fails mid-download', async () => {
+    const dir = tempDir()
+    try {
+      const fetcher = (async () =>
+        new Response(new ReadableStream({
+          start(controller) {
+            controller.enqueue(new Uint8Array([0xff]))
+            controller.error(new TypeError('network error mid-body'))
+          },
+        }), { status: 200, headers: { 'content-type': 'image/jpeg' } })) as unknown as typeof fetch
+      expect(await cacheArtwork(dir, 'https://x/abort.jpg', fetcher)).toBeNull()
+    } finally {
+      rmSync(dir, { recursive: true, force: true })
+    }
+  })
 })