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/update_account.rs

@@ -0,0 +1,55 @@
+use actix_web::{HttpResponse, web};
+
+use crate::api::response::{ApiErrorResponse, ApiResponse};
+use crate::error::AppError;
+use crate::models::users::User;
+use crate::service::AppService;
+use crate::service::user::account::UpdateUserAccountParams;
+use crate::session::Session;
+
+/// Update user account
+///
+/// Updates the authenticated user's account settings.
+/// Requires authentication.
+///
+/// Updatable fields:
+/// - username: New username (must be unique across the platform)
+/// - display_name: Human-readable display name
+/// - bio: Short biography text
+/// - visibility: Profile visibility ("public", "private", or "internal")
+///
+/// All fields are optional; only provided fields are updated.
+/// Returns the updated user account with all metadata.
+#[utoipa::path(
+    put,
+    path = "/api/v1/user/account",
+    tag = "User",
+    operation_id = "userUpdateAccount",
+    request_body(
+        content = UpdateUserAccountParams,
+        description = "Account update parameters (all fields optional)",
+        content_type = "application/json"
+    ),
+    responses(
+        (status = 200, description = "Account updated successfully. Returns updated user account with all metadata.", body = ApiResponse<User>),
+        (status = 400, description = "Invalid parameters: empty username or unsupported visibility value", body = ApiErrorResponse),
+        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
+        (status = 404, description = "User not found", body = ApiErrorResponse),
+        (status = 409, description = "Username already taken", body = ApiErrorResponse),
+        (status = 500, description = "Internal server error", body = ApiErrorResponse),
+    ),
+    security(
+        ("session_cookie" = [])
+    )
+)]
+pub async fn update_account(
+    service: web::Data<AppService>,
+    session: Session,
+    params: web::Json<UpdateUserAccountParams>,
+) -> Result<HttpResponse, AppError> {
+    let user = service
+        .user
+        .user_update_account(&session, params.into_inner())
+        .await?;
+    Ok(HttpResponse::Ok().json(ApiResponse::new(user)))
+}