feat: Add media thumbnail retrieval functionality and update MediaResponse structure

libertas_api/src/services/media_service.rs

@@ -127,6 +127,26 @@ impl MediaService for MediaServiceImpl {
         Ok(media.storage_path)
     }
 
+    async fn get_media_thumbnail_path(
+        &self,
+        id: Uuid,
+        user_id: Option<Uuid>,
+    ) -> CoreResult<String> {
+        self.auth_service
+            .check_permission(user_id, authz::Permission::ViewMedia(id))
+            .await?;
+
+        let media = self
+            .repo
+            .find_by_id(id)
+            .await?
+            .ok_or(CoreError::NotFound("Media".to_string(), id))?;
+
+        media
+            .thumbnail_path
+            .ok_or(CoreError::NotFound("Thumbnail for Media".to_string(), id))
+    }
+
     async fn delete_media(&self, id: Uuid, user_id: Uuid) -> CoreResult<()> {
         self.auth_service
             .check_permission(Some(user_id), authz::Permission::DeleteMedia(id))