feat(phase-c): resolve &mut-access phase-b TODOs via handle setters

PHP mutator methods that the Phase B port could not call because only
&self / &dyn / Rc access was available. Resolved by the interior-mutation
APIs that already exist: handle &self setters (set_dist/source_reference,
set_requires/dev/references/stability_flags), Rc<RefCell<dyn InputInterface>>
.borrow_mut(), and get_installation_manager().borrow_mut() (build_package_map
passes an empty/canonical package list per upstream). composer.get_package()
returns &RootPackageInterfaceHandle, so the "&dyn" Phase B note was wrong.
factory's set_config_source/set_auth_config_source were already live code;
their stale TODOs are removed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/crates/shirabe/src/command/init_command.rs b/crates/shirabe/src/command/init_command.rs
index 5a3c71b..f8bdad9 100644
--- a/crates/shirabe/src/command/init_command.rs
+++ b/crates/shirabe/src/command/init_command.rs
@@ -426,11 +426,19 @@ impl InitCommand {
 
         if !input.borrow().is_interactive() {
             if input.borrow().get_option("name").is_null() {
-                // TODO(phase-b): input.set_option requires &mut; signature passes &dyn here
+                let name = self.get_default_package_name();
+                input
+                    .borrow_mut()
+                    .set_option("name", PhpMixed::from(name))
+                    .expect("name option is defined");
             }
 
             if input.borrow().get_option("author").is_null() {
-                // TODO(phase-b): input.set_option requires &mut; signature passes &dyn here
+                let author = self.get_default_author();
+                input
+                    .borrow_mut()
+                    .set_option("author", PhpMixed::from(author))
+                    .expect("author option is defined");
             }
         }
     }