fix api in backend

backend/src/openapi.rs

@@ -81,7 +81,7 @@ pub mod schemas {
     pub use crate::error::ApiErrorResponse;
     pub use crate::models::ApiCapability;
     pub use crate::routes::correspondents::{
-        CorrespondentSummary, CorrespondentUsage, CreateCorrespondentRequest,
+        CorrespondentSummary, CreateCorrespondentRequest,
         UpdateCorrespondentRequest,
     };
     pub use crate::routes::documents::{

backend/src/routes/correspondents.rs

@@ -20,11 +20,6 @@ use crate::{
     },
 };
 
-#[derive(Serialize, ToSchema)]
-pub struct CorrespondentUsage {
-    pub total: i64,
-}
-
 #[derive(Serialize, ToSchema)]
 pub struct CorrespondentSummary {
     pub id: Uuid,
@@ -33,7 +28,7 @@ pub struct CorrespondentSummary {
     pub metadata: Value,
     pub created_at: String,
     pub updated_at: String,
-    pub usage: CorrespondentUsage,
+    pub usage_count: i64,
 }
 
 #[derive(Deserialize, ToSchema)]
@@ -268,14 +263,14 @@ pub async fn delete_correspondent(
     no_content()
 }
 
-fn build_summary(correspondent: Correspondent, total: i64) -> CorrespondentSummary {
+fn build_summary(correspondent: Correspondent, usage_count: i64) -> CorrespondentSummary {
     CorrespondentSummary {
         id: correspondent.id,
         name: correspondent.name,
         metadata: correspondent.metadata,
         created_at: to_iso(correspondent.created_at),
         updated_at: to_iso(correspondent.updated_at),
-        usage: CorrespondentUsage { total },
+        usage_count,
     }
 }
 
@@ -310,7 +305,6 @@ fn load_usage_for_correspondent(
     ),
     components(schemas(
         crate::routes::correspondents::CorrespondentSummary,
-        crate::routes::correspondents::CorrespondentUsage,
         crate::routes::correspondents::CreateCorrespondentRequest,
         crate::routes::correspondents::UpdateCorrespondentRequest
     ))