fix(package): keep list-shaped license arrays in ValidatingArrayLoader

PHP's `(array)` cast passes an array through unchanged, but the port only
matched the map shape and wrapped a JSON list (e.g. ["MIT"]) as a single
license value, which then failed the is-string check and was silently
dropped from composer.lock / installed.json with a bogus warning.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/crates/shirabe/src/package/loader/validating_array_loader.rs b/crates/shirabe/src/package/loader/validating_array_loader.rs
index 9ab7d583..0be0ef38 100644
--- a/crates/shirabe/src/package/loader/validating_array_loader.rs
+++ b/crates/shirabe/src/package/loader/validating_array_loader.rs
@@ -195,8 +195,15 @@ impl LoaderInterface for ValidatingArrayLoader {
             let license_val = self.config.borrow()["license"].clone();
             // validate main data types
             if is_array(&license_val) || is_string(&license_val) {
+                // PHP: `(array) $this->config['license']` — an array (list-shaped included)
+                // stays as-is; only a scalar is wrapped.
                 let mut licenses: IndexMap<String, PhpMixed> = match &license_val {
                     PhpMixed::Array(m) => m.clone(),
+                    PhpMixed::List(items) => items
+                        .iter()
+                        .enumerate()
+                        .map(|(i, v)| (i.to_string(), v.clone()))
+                        .collect(),
                     other => {
                         let mut m = IndexMap::new();
                         m.insert("0".to_string(), other.clone());