fix(input): thread a typed InputValue through the input layer

Options and arguments were stored and passed as PhpMixed even though
Symfony only ever puts a string, a bool, a list of strings or null in
one. get_option already narrowed to InputOptionValue at the boundary;
this widens that enum into InputValue and pushes it through
InputInterface, InputOption/InputArgument defaults, the Input storage,
ArgvInput/ArrayInput/StringInput/CompletionInput, Command::add_option
and add_argument, and the Composer-side wrappers.

Two neighbouring string|int unions get types of their own:
InputDefinition::{get_argument,has_argument} take an ArgumentName, and
ArrayInput keys its parameters by ParameterName. has_parameter_option
and get_parameter_option take the values they look for as &[&str],
which is what PHP's `(array) $values` cast produced anyway.

Two behaviours change along the way. Input::set_option on a negated
option now negates with PHP's loose bool cast rather than treating a
non-bool as false, matching `!$value`. ArrayInput::parse now resolves
an integer key to an argument position instead of looking up an
argument literally named "0".

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

2 files changed, 11 insertions, 13 deletions

diff --git a/crates/shirabe/src/console/input/input_argument.rs b/crates/shirabe/src/console/input/input_argument.rs
index 1e550926..8f7d526c 100644
--- a/crates/shirabe/src/console/input/input_argument.rs
+++ b/crates/shirabe/src/console/input/input_argument.rs
@@ -1,10 +1,10 @@
 //! ref: composer/src/Composer/Console/Input/InputArgument.php
 
 use crate::console::input::SuggestedValues;
-use shirabe_php_shim::PhpMixed;
 use shirabe_symfony_console::completion::CompletionInput;
 use shirabe_symfony_console::completion::CompletionSuggestions;
 use shirabe_symfony_console::input::InputArgument as BaseInputArgument;
+use shirabe_symfony_console::input::InputValue;
 
 #[derive(Debug)]
 pub struct InputArgument {
@@ -21,7 +21,7 @@ impl InputArgument {
         name: &str,
         mode: Option<i64>,
         description: &str,
-        default: Option<PhpMixed>,
+        default: Option<InputValue>,
     ) -> anyhow::Result<Self> {
         Self::new5(
             name,
@@ -37,14 +37,14 @@ impl InputArgument {
         name: &str,
         mode: Option<i64>,
         description: &str,
-        default: Option<PhpMixed>,
+        default: Option<InputValue>,
         suggested_values: SuggestedValues,
     ) -> anyhow::Result<Self> {
         let inner = BaseInputArgument::new(
             name.to_string(),
             mode,
             description.to_string(),
-            default.unwrap_or(PhpMixed::Null),
+            default.unwrap_or(InputValue::Null),
         )?;
         Ok(Self {
             inner,
diff --git a/crates/shirabe/src/console/input/input_option.rs b/crates/shirabe/src/console/input/input_option.rs
index 976f006f..6e84967e 100644
--- a/crates/shirabe/src/console/input/input_option.rs
+++ b/crates/shirabe/src/console/input/input_option.rs
@@ -1,10 +1,10 @@
 //! ref: composer/src/Composer/Console/Input/InputOption.php
 
 use crate::console::input::SuggestedValues;
-use shirabe_php_shim::PhpMixed;
 use shirabe_symfony_console::completion::CompletionInput;
 use shirabe_symfony_console::completion::CompletionSuggestions;
 use shirabe_symfony_console::input::InputOption as BaseInputOption;
+use shirabe_symfony_console::input::InputValue;
 
 #[derive(Debug)]
 pub struct InputOption {
@@ -21,10 +21,10 @@ impl InputOption {
 
     pub fn new(
         name: &str,
-        shortcut: Option<PhpMixed>,
+        shortcut: Option<&str>,
         mode: Option<i64>,
         description: &str,
-        default: Option<PhpMixed>,
+        default: Option<InputValue>,
     ) -> anyhow::Result<Self> {
         Self::new6(
             name,
@@ -39,16 +39,14 @@ impl InputOption {
     /// PHP's constructor with the sixth parameter, `$suggestedValues`.
     pub fn new6(
         name: &str,
-        shortcut: Option<PhpMixed>,
+        shortcut: Option<&str>,
         mode: Option<i64>,
         description: &str,
-        default: Option<PhpMixed>,
+        default: Option<InputValue>,
         suggested_values: SuggestedValues,
     ) -> anyhow::Result<Self> {
-        let shortcut = shortcut.unwrap_or(PhpMixed::Null);
-        let default_mixed = default.unwrap_or(PhpMixed::Null);
-        let inner =
-            BaseInputOption::new(name, shortcut, mode, description.to_string(), default_mixed)?;
+        let default = default.unwrap_or(InputValue::Null);
+        let inner = BaseInputOption::new(name, shortcut, mode, description.to_string(), default)?;
         // PHP throws LogicException here; suggested values on a valueless option cannot happen
         // at runtime unless a configure() is wrong, so this is a programming error.
         assert!(