feat(phase-c): resolve PHP-array-semantics phase-b TODOs

Resolve category K (array_* functions, integer keys, nested mutation,
sorting). Add shim variants (uasort over Vec<T>, uasort_map for IndexMap)
and delegate to existing typed variants (strtr_array, array_merge_map,
array_search_in_vec). Implement PHP array semantics directly where the
shape is fixed: canonical integer-key coercion (is_php_integer_key,
shared by config and FilesystemRepository::dumpToPhpCode), strict
array_search via trait-object pointer identity, array_reverse/array_chunk
preserve_keys loops, and the installed.php nested version mutations via
auto-vivify helpers.

Resolving the array_merge in UpdateCommand unmasked latent borrow bugs in
execute's tail (Rc input/output moved by value); fixed with .clone() to
match PHP reference sharing, and resolved the tightly-coupled Intervals
constraint check.

composerRequire reclassified to phase-c: it depends on the $GLOBALS
superglobal and PHP's require include mechanism, neither portable.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 23 insertions, 5 deletions

diff --git a/crates/shirabe/src/autoload/autoload_generator.rs b/crates/shirabe/src/autoload/autoload_generator.rs
index a0e51e9..69ecb73 100644
--- a/crates/shirabe/src/autoload/autoload_generator.rs
+++ b/crates/shirabe/src/autoload/autoload_generator.rs
@@ -1628,11 +1628,27 @@ impl AutoloadGenerator {
             };
 
             let mut autoload = package.get_autoload();
-            // PHP comparison: $package === $rootPackage (object identity). We compare by name as best-effort.
-            let is_root = package.get_name() == root_package.get_name();
+            let is_root = package.ptr_eq(&root_package.clone().into());
             if self.dev_mode.unwrap_or(false) && is_root {
-                // TODO(phase-b): array_merge_recursive semantics (nested merge) not preserved
-                autoload.extend(root_package.get_dev_autoload());
+                let merged = array_merge_recursive(vec![
+                    PhpMixed::Array(
+                        autoload
+                            .into_iter()
+                            .map(|(k, v)| (k, Box::new(v)))
+                            .collect(),
+                    ),
+                    PhpMixed::Array(
+                        root_package
+                            .get_dev_autoload()
+                            .into_iter()
+                            .map(|(k, v)| (k, Box::new(v)))
+                            .collect(),
+                    ),
+                ]);
+                autoload = match merged {
+                    PhpMixed::Array(m) => m.into_iter().map(|(k, v)| (k, *v)).collect(),
+                    _ => IndexMap::new(),
+                };
             }
 
             // skip misconfigured packages
@@ -1914,7 +1930,9 @@ impl AutoloadGenerator {
 }
 
 pub fn composer_require(_file_identifier: &str, _file: &str) {
-    // TODO(phase-b): PHP GLOBALS nested array access not supported
+    // TODO(phase-c): unportable — depends on the $GLOBALS superglobal
+    // ($GLOBALS['__composer_autoload_files']) and PHP's `require $file` include
+    // mechanism (see also ClassLoader's include closure), neither of which is modeled.
     todo!()
 }