feat(contents): add update method with user ownership validation

- Introduced `update` method in contents service to allow partial updates.
- Implemented user ownership validation to ensure secure modifications.
- Added cache clearing logic after successful updates.

backend/src/contents/contents.service.ts

@@ -194,6 +194,25 @@ export class ContentsService {
 		return updated;
 	}
 
+	async update(id: string, userId: string, data: any) {
+		this.logger.log(`Updating content ${id} for user ${userId}`);
+
+		// Vérifier que le contenu appartient à l'utilisateur
+		const existing = await this.contentsRepository.findOne(id, userId);
+		if (!existing || existing.userId !== userId) {
+			throw new BadRequestException(
+				"Contenu non trouvé ou vous n'avez pas la permission de le modifier.",
+			);
+		}
+
+		const updated = await this.contentsRepository.update(id, data);
+
+		if (updated) {
+			await this.clearContentsCache();
+		}
+		return updated;
+	}
+
 	async findOne(idOrSlug: string, userId?: string) {
 		const content = await this.contentsRepository.findOne(idOrSlug, userId);
 		if (!content) return null;