fix(check-platform-reqs-command): add PlatformRepository to existing composite

execute nested the already-built InstalledRepository inside a second
InstalledRepository, tripping the assertion that an InstalledRepository may not
contain another. PHP adds a PlatformRepository to the existing composite via
addRepository; do the same.

Un-ignores CheckPlatformReqsCommandTest::test_failed_platform_requirement.

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

1 files changed, 4 insertions, 7 deletions

diff --git a/crates/shirabe/src/command/check_platform_reqs_command.rs b/crates/shirabe/src/command/check_platform_reqs_command.rs
index 2ab66c5..a7f5d9c 100644
--- a/crates/shirabe/src/command/check_platform_reqs_command.rs
+++ b/crates/shirabe/src/command/check_platform_reqs_command.rs
@@ -285,13 +285,10 @@ impl Command for CheckPlatformReqsCommand {
         let mut requires_sorted: Vec<(String, Vec<Link>)> = requires.into_iter().collect();
         requires_sorted.sort_by(|a, b| a.0.cmp(&b.0));
 
-        let installed_repo_with_platform = InstalledRepository::new(vec![
-            crate::repository::RepositoryInterfaceHandle::new(installed_repo),
-            crate::repository::RepositoryInterfaceHandle::new(PlatformRepository::new(
-                vec![],
-                indexmap::IndexMap::new(),
-            )?),
-        ]);
+        installed_repo.add_repository(crate::repository::RepositoryInterfaceHandle::new(
+            PlatformRepository::new(vec![], indexmap::IndexMap::new())?,
+        ));
+        let installed_repo_with_platform = installed_repo;
 
         let mut results: Vec<CheckResult> = vec![];
         let mut exit_code = 0;