fix: v1.26.1 — hero/album/playlist background flickering

Background of Hero carousel, Album Detail and Playlist Detail was
flickering for up to 20 seconds on first visit. useCachedUrl with
fallbackToFetch=true returned the raw server URL immediately, causing
a double render — once with the HTTP URL and again when the blob was
ready. Fixed by passing fallbackToFetch=false in all three locations.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "Psysonic",
-  "version": "1.26.0",
+  "version": "1.26.1",
   "identifier": "dev.psysonic.player",
   "build": {
     "beforeDevCommand": "npm run dev",