refactor(api): reorder imports and update code formatting across repository endpoints

- Reordered actix-web imports to standardize import order
- Reordered crate module imports to follow alphabetical ordering
- Updated function calls to use multi-line formatting for better readability
- Standardized blank lines around documentation comments
- Applied consistent formatting to response handling methods
- Normalized import organization across all repository-related API files
- Improved code consistency and maintainability through standardized formatting
- Applied formatting updates to all repository endpoint implementations

api/user/list_ssh_keys.rs

@@ -0,0 +1,35 @@
+use actix_web::{HttpResponse, web};
+
+use crate::api::response::{ApiErrorResponse, ApiResponse};
+use crate::error::AppError;
+use crate::models::users::UserSshKey;
+use crate::service::AppService;
+use crate::session::Session;
+
+/// List user SSH keys
+///
+/// Returns all SSH public keys registered by the authenticated user.
+/// Keys are sorted by creation date (newest first).
+/// Only non-revoked keys are included.
+/// Requires authentication.
+#[utoipa::path(
+    get,
+    path = "/api/v1/user/keys/ssh",
+    tag = "User",
+    operation_id = "userListSshKeys",
+    responses(
+        (status = 200, description = "SSH keys listed successfully. Returns array of SSH key objects with fingerprints and metadata.", body = ApiResponse<Vec<UserSshKey>>),
+        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
+        (status = 500, description = "Internal server error", body = ApiErrorResponse),
+    ),
+    security(
+        ("session_cookie" = [])
+    )
+)]
+pub async fn list_ssh_keys(
+    service: web::Data<AppService>,
+    session: Session,
+) -> Result<HttpResponse, AppError> {
+    let keys = service.user.user_ssh_keys(&session).await?;
+    Ok(HttpResponse::Ok().json(ApiResponse::new(keys)))
+}