refactor: moved knowledge of subscription change time to store

src/server/gpodder/advanced/subscriptions.rs

@@ -85,8 +85,8 @@ pub async fn get_subscription_changes(
     .unwrap()
     .map(|(next_time_changed, add, remove)| {
         Json(SubscriptionDeltaResponse {
-            add,
-            remove,
+            add: add.into_iter().map(|s| s.url).collect(),
+            remove: remove.into_iter().map(|s| s.url).collect(),
             timestamp: next_time_changed.timestamp(),
         })
     })?)

src/server/gpodder/simple/subscriptions.rs

@@ -37,7 +37,7 @@ pub async fn get_device_subscriptions(
         tokio::task::spawn_blocking(move || ctx.store.subscriptions_for_device(&user, &id))
             .await
             .unwrap()
-            .map(Json)?,
+            .map(|subs| Json(subs.into_iter().map(|s| s.url).collect()))?,
     )
 }
 
@@ -54,7 +54,7 @@ pub async fn get_user_subscriptions(
         tokio::task::spawn_blocking(move || ctx.store.subscriptions_for_user(&user))
             .await
             .unwrap()
-            .map(Json)?,
+            .map(|subs| Json(subs.into_iter().map(|s| s.url).collect()))?,
     )
 }