Refactor admin routes to use new AppError struct in responses

src/routes/admin/newsletters.rs

@@ -1,7 +1,7 @@
 use crate::{
     authentication::AuthenticatedUser,
     idempotency::{IdempotencyKey, save_response, try_processing},
-    routes::AdminError,
+    routes::{AdminError, AppError},
     startup::AppState,
     templates::MessageTemplate,
 };
@@ -75,7 +75,7 @@ pub async fn publish_newsletter(
     }): State<AppState>,
     Extension(AuthenticatedUser { user_id, .. }): Extension<AuthenticatedUser>,
     Form(form): Form<BodyData>,
-) -> Result<Response, AdminError> {
+) -> Result<Response, AppError> {
     validate_form(&form).map_err(|e| AdminError::Publish(anyhow::anyhow!(e)))?;
 
     let idempotency_key: IdempotencyKey = form
@@ -104,9 +104,10 @@ pub async fn publish_newsletter(
     );
     let template = MessageTemplate::Success { message };
     let response = Html(template.render().unwrap()).into_response();
-    save_response(transaction, &idempotency_key, user_id, response)
+    let response = save_response(transaction, &idempotency_key, user_id, response)
         .await
-        .map_err(AdminError::UnexpectedError)
+        .map_err(AdminError::UnexpectedError)?;
+    Ok(response)
 }
 
 fn validate_form(form: &BodyData) -> Result<(), &'static str> {