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, 3 deletions

diff --git a/crates/shirabe/src/command/script_alias_command.rs b/crates/shirabe/src/command/script_alias_command.rs
index a054631..6499002 100644
--- a/crates/shirabe/src/command/script_alias_command.rs
+++ b/crates/shirabe/src/command/script_alias_command.rs
@@ -1,7 +1,6 @@
 //! ref: composer/src/Composer/Command/ScriptAliasCommand.php
 
 use crate::command::{BaseCommand, BaseCommandData, HasBaseCommandData};
-use crate::composer::Composer;
 use crate::console::input::InputArgument;
 use crate::console::input::InputOption;
 use crate::io::IOInterface;
@@ -98,6 +97,9 @@ impl ScriptAliasCommand {
         _output: &dyn OutputInterface,
     ) -> Result<i64> {
         let composer = self.require_composer(None, None)?;
+        let dispatcher = crate::command::composer_full(&composer)
+            .get_event_dispatcher()
+            .clone();
 
         let args = input.get_arguments();
 
@@ -136,8 +138,7 @@ impl ScriptAliasCommand {
             })
             .unwrap_or_default();
 
-        Ok(composer
-            .get_event_dispatcher()
+        Ok(dispatcher
             .borrow_mut()
             .dispatch_script(&self.script, dev_mode, args_value, flags)?)
     }