refactor(operation,link): port __toString to Display

Move __toString ports to std::fmt::Display: convert Link's inherent
to_string() and make OperationInterface require Display instead of a
to_string() method, with each operation implementing Display.

Also fix the operation __toString output to use show(false), matching
SolverOperation::__toString() (was show(true)).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/crates/shirabe/src/dependency_resolver/operation/operation_interface.rs b/crates/shirabe/src/dependency_resolver/operation/operation_interface.rs
index 51b150c..30ed8eb 100644
--- a/crates/shirabe/src/dependency_resolver/operation/operation_interface.rs
+++ b/crates/shirabe/src/dependency_resolver/operation/operation_interface.rs
@@ -4,15 +4,13 @@ use crate::dependency_resolver::operation::InstallOperation;
 use crate::dependency_resolver::operation::UninstallOperation;
 use crate::dependency_resolver::operation::UpdateOperation;
 
-pub trait OperationInterface: std::fmt::Debug {
+pub trait OperationInterface: std::fmt::Display + std::fmt::Debug {
     fn as_any(&self) -> &dyn std::any::Any;
 
     fn get_operation_type(&self) -> String;
 
     fn show(&self, lock: bool) -> String;
 
-    fn to_string(&self) -> String;
-
     fn as_install_operation(&self) -> Option<&InstallOperation> {
         None
     }