refactor: replace IntoServiceError trait with direct ServiceError conversions

apps/api/src/errors/service_error.rs

@@ -1,15 +1,23 @@
-pub type ServiceError = Box<dyn std::error::Error + Send + Sync>;
+use sea_orm::DbErr;
 
-#[allow(dead_code)] // TODO: remove when used
-pub trait IntoServiceError {
-    fn into_service_error(self) -> ServiceError;
+pub enum ServiceError {
+    NotFound(String),
+    DatabaseError(String),
+    Unauthorized(String),
+    InternalError(String),
 }
 
-impl<T> IntoServiceError for T
-where
-    T: std::error::Error + Send + Sync + 'static,
-{
-    fn into_service_error(self) -> ServiceError {
-        Box::new(self)
+impl From<Box<dyn std::error::Error + Send + Sync + 'static>> for ServiceError {
+    fn from(err: Box<dyn std::error::Error + Send + Sync + 'static>) -> Self {
+        ServiceError::InternalError(err.to_string())
+    }
+}
+
+impl From<DbErr> for ServiceError {
+    fn from(err: DbErr) -> Self {
+        match err {
+            DbErr::RecordNotFound(msg) => ServiceError::NotFound(msg),
+            _ => ServiceError::DatabaseError(err.to_string()),
+        }
     }
 }