fix: load video posters in admin dashboard and handle video thumbnail fallback

src/app/admin/page.tsx

@@ -346,14 +346,14 @@ export default function AdminDashboard() {
               ) : (
                 /* eslint-disable-next-line @next/next/no-img-element */
                 <img 
-                  src={`/api/media/${item.relativePath}?type=thumb`} 
+                  src={`/api/media/${item.relativePath}?type=${item.mediaType === 'VIDEO' ? 'poster' : 'thumb'}`} 
                   alt={item.filename}
                   style={{ width: '100%', height: '100%', objectFit: 'cover' }}
                   loading="lazy"
                 />
               )}
               {item.mediaType === 'VIDEO' && (
-                <div style={{ position: 'absolute', inset: 0, display: 'flex', alignItems: 'center', justifyContent: 'center', background: 'rgba(0,0,0,0.3)' }}>
+                <div style={{ position: 'absolute', inset: 0, display: 'flex', alignItems: 'center', justifyContent: 'center', background: 'rgba(0,0,0,0.3)', pointerEvents: 'none' }}>
                   <svg width="24" height="24" viewBox="0 0 24 24" fill="white" stroke="none"><polygon points="5 3 19 12 5 21 5 3"></polygon></svg>
                 </div>
               )}

src/app/api/media/[...path]/route.ts

@@ -50,11 +50,12 @@ export async function GET(
 
     switch (type) {
       case 'thumb':
-        filePath = getThumbnailPath(relativePath);
-        contentTypeExt = '.webp';
-        break;
       case 'gallery':
-        filePath = getGalleryPath(relativePath);
+        if (mediaItem.mediaType === 'VIDEO') {
+          filePath = getVideoPosterPath(relativePath);
+        } else {
+          filePath = type === 'gallery' ? getGalleryPath(relativePath) : getThumbnailPath(relativePath);
+        }
         contentTypeExt = '.webp';
         break;
       case 'poster':
@@ -76,8 +77,46 @@ export async function GET(
     try {
       await fs.promises.access(filePath, fs.constants.R_OK);
     } catch {
-      // Cache asset might not be generated yet — fall back to 404
-      return new NextResponse('Not found', { status: 404 });
+      // Cache asset might not be generated yet — attempt on-demand generation
+      try {
+        if (mediaItem.mediaType === 'VIDEO' && (type === 'poster' || type === 'thumb' || type === 'gallery')) {
+          const { processVideo } = await import('@/lib/processing/videos');
+          const dims = await processVideo(relativePath);
+          if (dims) {
+            await prisma.mediaItem.update({
+              where: { relativePath },
+              data: {
+                width: dims.width,
+                height: dims.height,
+                duration: dims.duration,
+                previewReady: true,
+                thumbnailReady: true,
+              },
+            });
+          }
+        } else if (mediaItem.mediaType === 'IMAGE' && (type === 'thumb' || type === 'gallery')) {
+          const { processImage } = await import('@/lib/processing/images');
+          const dims = await processImage(relativePath);
+          if (dims) {
+            await prisma.mediaItem.update({
+              where: { relativePath },
+              data: {
+                width: dims.width,
+                height: dims.height,
+                thumbnailReady: true,
+              },
+            });
+          }
+        }
+      } catch (genErr) {
+        console.error(`[Media] On-demand processing failed for ${relativePath}:`, genErr);
+      }
+
+      try {
+        await fs.promises.access(filePath, fs.constants.R_OK);
+      } catch {
+        return new NextResponse('Not found', { status: 404 });
+      }
     }
 
     // Get file stats for Content-Length

tsconfig.tsbuildinfo

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