refactor(showcase): improve custom image identification logic in renderMediaItem and findLocalFile functions

static/js/components/shared/showcase/MediaRenderers.js

@@ -75,8 +75,6 @@ export function generateImageWrapper(media, heightPercent, shouldBlur, nsfwText,
                 data-remote-src="${remoteUrl}"
                 data-nsfw-level="${nsfwLevel}"
                 alt="Preview" 
-                crossorigin="anonymous" 
-                referrerpolicy="no-referrer"
                 width="${media.width}"
                 height="${media.height}"
                 class="lazy ${shouldBlur ? 'blurred' : ''}"> 

static/js/components/shared/showcase/ShowcaseView.js

@@ -191,7 +191,7 @@ function renderMediaItem(img, index, exampleFiles) {
     );
     
     // Determine if this is a custom image (has id property)
-    const isCustomImage = Boolean(img.id);
+    const isCustomImage = Boolean(typeof img.id === 'string' && img.id);
     
     // Create the media control buttons HTML
     const mediaControlsHtml = `
@@ -235,7 +235,7 @@ function findLocalFile(img, index, exampleFiles) {
     
     let localFile = null;
     
-    if (img.id) {
+    if (typeof img.id === 'string' && img.id) {
         // This is a custom image, find by custom_<id>
         const customPrefix = `custom_${img.id}`;
         localFile = exampleFiles.find(file => file.name.startsWith(customPrefix));