refactor(package): introduce Rc<RefCell<_>> handles for packages

PHP packages have reference semantics, so introduce shared-ownership
handles over an AnyPackage enum (PackageInterfaceHandle and friends)
and replace Box<dyn PackageInterface> throughout.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/crates/shirabe/src/dependency_resolver/local_repo_transaction.rs b/crates/shirabe/src/dependency_resolver/local_repo_transaction.rs
index b4aa4a4..7b60522 100644
--- a/crates/shirabe/src/dependency_resolver/local_repo_transaction.rs
+++ b/crates/shirabe/src/dependency_resolver/local_repo_transaction.rs
@@ -14,9 +14,9 @@ impl LocalRepoTransaction {
         locked_repository: &dyn RepositoryInterface,
         local_repository: &dyn InstalledRepositoryInterface,
     ) -> Self {
-        // TODO(phase-b): RepositoryInterface::get_packages returns Box<dyn BasePackage>
-        // but Transaction::new wants Box<dyn PackageInterface>. Upcast each via PackageInterface
-        // trait once a `into_package_interface` helper is added.
+        // TODO(phase-c): RepositoryInterface::get_packages yields BasePackageHandle; widen each to
+        // PackageInterfaceHandle (via .into()) and feed them to Transaction::new once the repository
+        // getters expose handles here.
         let _ = (locked_repository, local_repository);
         Self {
             inner: Transaction::new(Vec::new(), Vec::new()),