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/delete_account.rs

@@ -0,0 +1,46 @@
+use actix_web::{HttpResponse, web};
+
+use crate::api::response::{ApiErrorResponse, ApiResponse};
+use crate::error::AppError;
+use crate::service::AppService;
+use crate::session::Session;
+
+/// Delete user account
+///
+/// Permanently deletes the authenticated user's account and all associated data.
+/// Requires authentication.
+///
+/// Preconditions:
+/// - User must transfer or delete all owned workspaces
+/// - User must transfer or delete all owned repositories
+///
+/// Effects:
+/// - All user data is removed (SSH keys, GPG keys, sessions, devices, OAuth links, etc.)
+/// - User is soft-deleted (marked as deleted, not physically removed)
+/// - Current session is cleared
+/// - Account cannot be recovered
+///
+/// Returns success message on completion.
+#[utoipa::path(
+    delete,
+    path = "/api/v1/user/account",
+    tag = "User",
+    operation_id = "userDeleteAccount",
+    responses(
+        (status = 200, description = "Account deleted successfully. All user data has been removed.", body = ApiResponse<String>),
+        (status = 400, description = "Cannot delete: user still owns workspaces or repositories", body = ApiErrorResponse),
+        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
+        (status = 404, description = "User not found", body = ApiErrorResponse),
+        (status = 500, description = "Internal server error", body = ApiErrorResponse),
+    ),
+    security(
+        ("session_cookie" = [])
+    )
+)]
+pub async fn delete_account(
+    service: web::Data<AppService>,
+    session: Session,
+) -> Result<HttpResponse, AppError> {
+    service.user.user_delete_account(&session).await?;
+    Ok(HttpResponse::Ok().json(ApiResponse::new("Account deleted successfully".to_string())))
+}