Add custom overlay image upload feature with style options

Jellyfin.Plugin.MediaBarEnhanced/Web/mediaBarEnhanced.js

@@ -61,6 +61,7 @@ const CONFIG = {
   enableCustomOverlay: false,
   customOverlayText: "",
   customOverlayImageUrl: "",
+  customOverlayStyle: "Shadowed",
   enableCustomMediaIds: true,
   enableSeasonalContent: false,
   customMediaIds: "",
@@ -3851,7 +3852,7 @@ const slidesInit = async () => {
       overlayContainer.appendChild(img);
     } else if (activeOverlayText) {
       const p = document.createElement("p");
-      p.className = "custom-overlay-text";
+      p.className = `custom-overlay-text custom-overlay-style-${CONFIG.customOverlayStyle || 'Shadowed'}`;
       p.textContent = activeOverlayText;
       overlayContainer.appendChild(p);
     }