feat: add ViewCounter enhancements and file upload progress tracking

- Improved `ViewCounter` with visibility-based view increment using `IntersectionObserver` and 50% video progress tracking.
- Added real-time file upload progress updates via Socket.io, including status and percentage feedback.
- Integrated `ViewCounter` dynamically into `ContentCard` and removed redundant instances from static pages.
- Updated backend upload logic to emit progress updates at different stages via the `EventsGateway`.

frontend/src/app/(dashboard)/upload/page.tsx

@@ -36,6 +36,7 @@ import {
 } from "@/components/ui/select";
 import { Spinner } from "@/components/ui/spinner";
 import { useAuth } from "@/providers/auth-provider";
+import { useSocket } from "@/providers/socket-provider";
 import { CategoryService } from "@/services/category.service";
 import { ContentService } from "@/services/content.service";
 import type { Category } from "@/types/content";
@@ -52,10 +53,32 @@ type UploadFormValues = z.infer<typeof uploadSchema>;
 export default function UploadPage() {
 	const router = useRouter();
 	const { isAuthenticated, isLoading } = useAuth();
+	const { socket } = useSocket();
 	const [categories, setCategories] = React.useState<Category[]>([]);
 	const [file, setFile] = React.useState<File | null>(null);
 	const [preview, setPreview] = React.useState<string | null>(null);
 	const [isUploading, setIsUploading] = React.useState(false);
+	const [uploadStatus, setUploadStatus] = React.useState<string>("");
+	const [uploadProgress, setUploadProgress] = React.useState<number>(0);
+
+	React.useEffect(() => {
+		if (socket) {
+			socket.on(
+				"upload_progress",
+				(data: { status: string; progress: number; message?: string }) => {
+					setUploadStatus(data.status);
+					setUploadProgress(data.progress);
+					if (data.status === "error" && data.message) {
+						toast.error(data.message);
+					}
+				},
+			);
+
+			return () => {
+				socket.off("upload_progress");
+			};
+		}
+	}, [socket]);
 
 	const form = useForm<UploadFormValues>({
 		resolver: zodResolver(uploadSchema),
@@ -327,10 +350,20 @@ export default function UploadPage() {
 
 							<Button type="submit" className="w-full" disabled={isUploading}>
 								{isUploading ? (
-									<>
-										<Loader2 className="mr-2 h-4 w-4 animate-spin" />
-										Upload en cours...
-									</>
+									<div className="flex flex-col items-center gap-1">
+										<div className="flex items-center gap-2">
+											<Loader2 className="h-4 w-4 animate-spin" />
+											<span>{uploadProgress}%</span>
+										</div>
+										<span className="text-[10px] uppercase tracking-wider opacity-70">
+											{uploadStatus === "starting" && "Initialisation..."}
+											{uploadStatus === "scanning" && "Scan Antivirus..."}
+											{uploadStatus === "processing" && "Optimisation..."}
+											{uploadStatus === "uploading_s3" && "Envoi au cloud..."}
+											{uploadStatus === "saving" && "Finalisation..."}
+											{uploadStatus === "completed" && "Terminé !"}
+										</span>
+									</div>
 								) : (
 									"Publier le mème"
 								)}