fix: Replace broken media thumbnails with MediaThumbnail component

Old Cloudinary URLs no longer load (account full). The new MediaThumbnail
component handles broken URLs gracefully with a fallback icon, and uses
<video preload="metadata"> for local video files to show the first frame.

- New component: client/src/components/media-thumbnail.tsx
- Updated: new-reel.tsx, new-post.tsx, media-upload.tsx,
           edit-scheduled-post-dialog.tsx

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

client/src/components/edit-scheduled-post-dialog.tsx

@@ -10,6 +10,7 @@ import { apiRequest, queryClient } from "@/lib/queryClient";
 import type { SocialPage, Media, Post } from "@shared/schema";
 import { format } from "date-fns";
 import { Image as ImageIcon, CheckCircle } from "lucide-react";
+import { MediaThumbnail } from "@/components/media-thumbnail";
 
 interface EditScheduledPostDialogProps {
   open: boolean;
@@ -165,9 +166,10 @@ export default function EditScheduledPostDialog({ open, onOpenChange, scheduledP
                 if (!media) return null;
                 return (
                   <div key={mediaId} className="relative group">
-                    <img
+                    <MediaThumbnail
                       src={media.instagramFeedUrl || media.originalUrl}
                       alt="Selected"
+                      type={media.type === 'video' ? 'video' : 'image'}
                       className="w-full h-24 object-cover rounded-lg border-2 border-primary"
                     />
                     <div className="absolute top-1 left-1 bg-primary text-primary-foreground rounded-full w-6 h-6 flex items-center justify-center text-xs font-bold">
@@ -198,9 +200,10 @@ export default function EditScheduledPostDialog({ open, onOpenChange, scheduledP
                     className="relative group"
                     data-testid={`button-select-media-${media.id}`}
                   >
-                    <img
+                    <MediaThumbnail
                       src={media.instagramFeedUrl || media.originalUrl}
                       alt={media.fileName}
+                      type={media.type === 'video' ? 'video' : 'image'}
                       className={`w-full h-20 object-cover rounded-lg border-2 transition-all ${
                         isSelected ? 'border-primary' : 'border-border hover:border-primary/50'
                       }`}

client/src/components/media-thumbnail.tsx

@@ -0,0 +1,57 @@
+import { useState } from 'react';
+import { ImageIcon, VideoIcon } from 'lucide-react';
+
+interface MediaThumbnailProps {
+  src: string;
+  alt: string;
+  type?: 'image' | 'video';
+  className?: string;
+}
+
+function isVideoUrl(url: string): boolean {
+  return /\.(mp4|mov|avi|webm|mkv|m4v)(\?.*)?$/i.test(url);
+}
+
+/**
+ * Renders a media thumbnail that handles:
+ * - Local video files: uses <video preload="metadata"> to show first frame
+ * - Images: standard <img> with lazy loading
+ * - Broken/unavailable URLs: shows a placeholder icon
+ */
+export function MediaThumbnail({ src, alt, type, className = "w-full h-full object-cover" }: MediaThumbnailProps) {
+  const [error, setError] = useState(false);
+  const isVideo = type === 'video' || isVideoUrl(src);
+
+  if (error || !src) {
+    return (
+      <div className={`flex items-center justify-center bg-muted ${className.replace('object-cover', '')}`}>
+        {isVideo
+          ? <VideoIcon className="w-8 h-8 text-muted-foreground" />
+          : <ImageIcon className="w-8 h-8 text-muted-foreground" />
+        }
+      </div>
+    );
+  }
+
+  if (isVideo) {
+    return (
+      <video
+        src={src}
+        className={className}
+        preload="metadata"
+        muted
+        onError={() => setError(true)}
+      />
+    );
+  }
+
+  return (
+    <img
+      src={src}
+      alt={alt}
+      className={className}
+      loading="lazy"
+      onError={() => setError(true)}
+    />
+  );
+}

client/src/components/media-upload.tsx

@@ -4,7 +4,7 @@ import { Button } from "@/components/ui/button";
 import { Dialog, DialogContent } from "@/components/ui/dialog";
 import { useMutation, useQuery } from "@tanstack/react-query";
 import { apiRequest, queryClient } from "@/lib/queryClient";
-import { getVideoThumbnailUrl } from "@/lib/media-utils";
+import { MediaThumbnail } from "@/components/media-thumbnail";
 import { CloudUpload, Image as ImageIcon, Video, X, Upload, Loader2, ZoomIn, Camera } from "lucide-react";
 import { useToast } from "@/hooks/use-toast";
 import { SiFacebook, SiInstagram } from "react-icons/si";
@@ -273,33 +273,11 @@ export default function MediaUpload() {
                       className="relative aspect-square rounded-lg overflow-hidden border-2 border-border/50 cursor-pointer hover:border-primary hover:shadow-lg transition-all group"
                       data-testid={`media-item-${media.id}`}
                     >
-                      {media.type === "video" ? (
-                        <>
-                          <img
-                            src={getVideoThumbnailUrl(media.originalUrl)}
-                            alt={media.fileName}
-                            className="w-full h-full object-cover"
-                            loading="lazy"
-                            onError={(e) => {
-                              // Fallback: replace broken img with Video icon
-                              const target = e.currentTarget;
-                              target.style.display = 'none';
-                              const fallback = target.parentElement?.querySelector('.video-fallback');
-                              if (fallback) (fallback as HTMLElement).style.display = 'flex';
-                            }}
-                          />
-                          <div className="video-fallback w-full h-full bg-muted/30 flex items-center justify-center absolute inset-0" style={{ display: 'none' }}>
-                            <Video className="w-12 h-12 text-secondary" />
-                          </div>
-                        </>
-                      ) : (
-                        <img
+                      <MediaThumbnail
                         src={media.facebookFeedUrl || media.originalUrl}
                         alt={media.fileName}
-                          className="w-full h-full object-cover"
-                          loading="lazy"
+                        type={media.type === 'video' ? 'video' : 'image'}
                       />
-                      )}
                       <div className="absolute top-2 right-2 flex gap-2">
                         {media.type === "image" && (
                           <button

client/src/pages/new-post.tsx

@@ -32,7 +32,7 @@ import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@
 import { Dialog, DialogContent } from "@/components/ui/dialog";
 import { useToast } from "@/hooks/use-toast";
 import { apiRequest, queryClient } from "@/lib/queryClient";
-import { getVideoThumbnailUrl } from "@/lib/media-utils";
+import { MediaThumbnail } from "@/components/media-thumbnail";
 import type { SocialPage, Media, ScheduledPost } from "@shared/schema";
 import { PreviewModal } from "@/components/preview-modal";
 import { DateTimePicker } from "@/components/datetime-picker";
@@ -77,21 +77,11 @@ function SortableMediaItem({
         className="w-full h-full"
         data-testid={`button-select-media-${media.id}`}
       >
-        {isVideo ? (
-          <img
-            src={getVideoThumbnailUrl(media.originalUrl)}
-            alt={media.fileName}
-            className="w-full h-full object-cover"
-            loading="lazy"
-          />
-        ) : (
-          <img
+        <MediaThumbnail
           src={media.facebookFeedUrl || media.originalUrl}
           alt={media.fileName}
-            className="w-full h-full object-cover"
-            loading="lazy"
+          type={isVideo ? 'video' : 'image'}
         />
-        )}
       </button>
       {isSelected && (
         <>
@@ -543,21 +533,11 @@ export default function NewPost() {
                                     }`}
                                   data-testid={`button-select-media-${media.id}`}
                                 >
-                                  {isVideo ? (
-                                    <img
-                                      src={getVideoThumbnailUrl(media.originalUrl)}
-                                      alt={media.fileName}
-                                      className="w-full h-full object-cover"
-                                      loading="lazy"
-                                    />
-                                  ) : (
-                                    <img
+                                  <MediaThumbnail
                                     src={media.facebookFeedUrl || media.originalUrl}
                                     alt={media.fileName}
-                                      className="w-full h-full object-cover"
-                                      loading="lazy"
+                                    type={isVideo ? 'video' : 'image'}
                                   />
-                                  )}
                                   {isSelected && (
                                     <div className="absolute inset-0 bg-primary/10 flex items-center justify-center">
                                       <div className="text-xs font-semibold text-primary">Sélectionnée</div>

client/src/pages/new-reel.tsx

@@ -27,7 +27,7 @@ import {
 import { useToast } from "@/hooks/use-toast";
 import { apiRequest, queryClient } from "@/lib/queryClient";
 import type { SocialPage, Media } from "@shared/schema";
-import { getVideoThumbnailUrl } from "@/lib/media-utils";
+import { MediaThumbnail } from "@/components/media-thumbnail";
 import { DateTimePicker } from "@/components/datetime-picker";
 
 interface MusicTrack {
@@ -487,11 +487,10 @@ export default function NewReel() {
                                                                 : 'border-transparent hover:border-muted-foreground'
                                                                 }`}
                                                         >
-                                                            <img
-                                                                src={getVideoThumbnailUrl(media.originalUrl)}
+                                                            <MediaThumbnail
+                                                                src={media.originalUrl}
                                                                 alt={media.fileName}
-                                                                className="w-full h-full object-cover"
-                                                                loading="lazy"
+                                                                type="video"
                                                             />
                                                             {selectedVideoId === media.id && (
                                                                 <div className="absolute inset-0 bg-primary/20 flex items-center justify-center">