refactor(composer): unify Composer/PartialComposer via Rc handles

Model PHP's `Composer extends PartialComposer` as a PartialOrFullComposer
enum and merge partial_composer.rs into composer.rs. Introduce
ComposerHandle / PartialComposerHandle (plus their Weak variants) so the
graph can be shared, and build it at once with Rc::new_cyclic in the
factory to resolve the back-reference cycles.

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

1 files changed, 4 insertions, 4 deletions

diff --git a/crates/shirabe/src/plugin/plugin_interface.rs b/crates/shirabe/src/plugin/plugin_interface.rs
index 875976f..ae5e3b6 100644
--- a/crates/shirabe/src/plugin/plugin_interface.rs
+++ b/crates/shirabe/src/plugin/plugin_interface.rs
@@ -1,17 +1,17 @@
 //! ref: composer/src/Composer/Plugin/PluginInterface.php
 
-use crate::composer::Composer;
+use crate::composer::ComposerHandle;
 use crate::io::IOInterface;
 use crate::plugin::Capable;
 
 pub const PLUGIN_API_VERSION: &'static str = "2.9.0";
 
 pub trait PluginInterface: std::fmt::Debug {
-    fn activate(&mut self, composer: &Composer, io: &dyn IOInterface);
+    fn activate(&mut self, composer: &ComposerHandle, io: &dyn IOInterface);
 
-    fn deactivate(&mut self, composer: &Composer, io: &dyn IOInterface);
+    fn deactivate(&mut self, composer: &ComposerHandle, io: &dyn IOInterface);
 
-    fn uninstall(&mut self, composer: &Composer, io: &dyn IOInterface);
+    fn uninstall(&mut self, composer: &ComposerHandle, io: &dyn IOInterface);
 
     fn clone_box(&self) -> Box<dyn PluginInterface> {
         todo!()