feat(php-shim): give ported exceptions PHP's class hierarchy

Ported exceptions were flat structs reached with `downcast_ref`, so
Composer's `catch (\RuntimeException $e)` only matched the exact leaf
type and `get_class($e)` had nothing to report. Each exception now
embeds an instance of the class it extends and travels inside an
`AnyThrowable`; `Catch::catch`/`catch_mut` walk that chain, and
`PhpClass::php_class_name` yields the PHP FQCN.

Dropping the `std::error::Error` impls from the exception types leaves
`AnyThrowable` as the only route into an `anyhow::Error`, so the walk
cannot be bypassed. A `no_exception_downcast` linter catches the
`downcast::<X>()` calls that would now silently answer `None`.

Three sites change behavior as a result: the `TransportException`
exit-code override reaches `MaxFileSizeExceededException`, the
`catch (\LogicException)` in findSimilar() reaches its subclasses, and
rendered exception titles carry the real class name rather than a
guess. `get_class_err()` is no longer a `todo!()`, which re-enables
FilesystemRepositoryTest::testCorruptedRepositoryFile.

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

8 files changed, 57 insertions, 39 deletions

diff --git a/crates/shirabe-external-packages/src/symfony/console/exception/command_not_found_exception.rs b/crates/shirabe-external-packages/src/symfony/console/exception/command_not_found_exception.rs
index 5a6959d4..4b27c5e6 100644
--- a/crates/shirabe-external-packages/src/symfony/console/exception/command_not_found_exception.rs
+++ b/crates/shirabe-external-packages/src/symfony/console/exception/command_not_found_exception.rs
@@ -1,21 +1,17 @@
 //! ref: composer/vendor/symfony/console/Exception/CommandNotFoundException.php
 
 use super::exception_interface::ExceptionInterface;
-use super::invalid_argument_exception::InvalidArgumentException;
 
 #[derive(Debug)]
 pub struct CommandNotFoundException {
-    inner: InvalidArgumentException,
+    inner: shirabe_php_shim::InvalidArgumentException,
     alternatives: Vec<String>,
 }
 
 impl CommandNotFoundException {
     pub fn new(message: String, alternatives: Vec<String>, code: i64) -> Self {
         Self {
-            inner: InvalidArgumentException(shirabe_php_shim::InvalidArgumentException {
-                message,
-                code,
-            }),
+            inner: shirabe_php_shim::InvalidArgumentException::with_code(message, code),
             alternatives,
         }
     }
@@ -25,12 +21,10 @@ impl CommandNotFoundException {
     }
 }
 
-impl std::fmt::Display for CommandNotFoundException {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.inner)
-    }
-}
-
-impl std::error::Error for CommandNotFoundException {}
+shirabe_php_shim::impl_php_exception!(
+    CommandNotFoundException,
+    inner,
+    r"Symfony\Component\Console\Exception\CommandNotFoundException"
+);
 
 impl ExceptionInterface for CommandNotFoundException {}
diff --git a/crates/shirabe-external-packages/src/symfony/console/exception/exception_interface.rs b/crates/shirabe-external-packages/src/symfony/console/exception/exception_interface.rs
index ce279fdb..bb2200f6 100644
--- a/crates/shirabe-external-packages/src/symfony/console/exception/exception_interface.rs
+++ b/crates/shirabe-external-packages/src/symfony/console/exception/exception_interface.rs
@@ -1,3 +1,3 @@
 //! ref: composer/vendor/symfony/console/Exception/ExceptionInterface.php
 
-pub trait ExceptionInterface: std::error::Error {}
+pub trait ExceptionInterface: shirabe_php_shim::Throwable {}
diff --git a/crates/shirabe-external-packages/src/symfony/console/exception/invalid_argument_exception.rs b/crates/shirabe-external-packages/src/symfony/console/exception/invalid_argument_exception.rs
index ac3be3b2..ced79b44 100644
--- a/crates/shirabe-external-packages/src/symfony/console/exception/invalid_argument_exception.rs
+++ b/crates/shirabe-external-packages/src/symfony/console/exception/invalid_argument_exception.rs
@@ -5,12 +5,16 @@ use super::exception_interface::ExceptionInterface;
 #[derive(Debug)]
 pub struct InvalidArgumentException(pub shirabe_php_shim::InvalidArgumentException);
 
-impl std::fmt::Display for InvalidArgumentException {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.0)
+impl InvalidArgumentException {
+    pub fn new(message: String) -> Self {
+        Self(shirabe_php_shim::InvalidArgumentException::new(message))
     }
 }
 
-impl std::error::Error for InvalidArgumentException {}
+shirabe_php_shim::impl_php_exception!(
+    InvalidArgumentException,
+    0,
+    r"Symfony\Component\Console\Exception\InvalidArgumentException"
+);
 
 impl ExceptionInterface for InvalidArgumentException {}
diff --git a/crates/shirabe-external-packages/src/symfony/console/exception/invalid_option_exception.rs b/crates/shirabe-external-packages/src/symfony/console/exception/invalid_option_exception.rs
index 2cc23817..04de3d42 100644
--- a/crates/shirabe-external-packages/src/symfony/console/exception/invalid_option_exception.rs
+++ b/crates/shirabe-external-packages/src/symfony/console/exception/invalid_option_exception.rs
@@ -1,17 +1,21 @@
 //! ref: composer/vendor/symfony/console/Exception/InvalidOptionException.php
 
 use super::exception_interface::ExceptionInterface;
-use super::invalid_argument_exception::InvalidArgumentException;
+use shirabe_php_shim::InvalidArgumentException;
 
 #[derive(Debug)]
 pub struct InvalidOptionException(pub InvalidArgumentException);
 
-impl std::fmt::Display for InvalidOptionException {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.0)
+impl InvalidOptionException {
+    pub fn new(message: String) -> Self {
+        Self(InvalidArgumentException::new(message))
     }
 }
 
-impl std::error::Error for InvalidOptionException {}
+shirabe_php_shim::impl_php_exception!(
+    InvalidOptionException,
+    0,
+    r"Symfony\Component\Console\Exception\InvalidOptionException"
+);
 
 impl ExceptionInterface for InvalidOptionException {}
diff --git a/crates/shirabe-external-packages/src/symfony/console/exception/logic_exception.rs b/crates/shirabe-external-packages/src/symfony/console/exception/logic_exception.rs
index 2c782195..03d9241f 100644
--- a/crates/shirabe-external-packages/src/symfony/console/exception/logic_exception.rs
+++ b/crates/shirabe-external-packages/src/symfony/console/exception/logic_exception.rs
@@ -5,12 +5,16 @@ use super::exception_interface::ExceptionInterface;
 #[derive(Debug)]
 pub struct LogicException(pub shirabe_php_shim::LogicException);
 
-impl std::fmt::Display for LogicException {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.0)
+impl LogicException {
+    pub fn new(message: String) -> Self {
+        Self(shirabe_php_shim::LogicException::new(message))
     }
 }
 
-impl std::error::Error for LogicException {}
+shirabe_php_shim::impl_php_exception!(
+    LogicException,
+    0,
+    r"Symfony\Component\Console\Exception\LogicException"
+);
 
 impl ExceptionInterface for LogicException {}
diff --git a/crates/shirabe-external-packages/src/symfony/console/exception/missing_input_exception.rs b/crates/shirabe-external-packages/src/symfony/console/exception/missing_input_exception.rs
index 65474c2b..f9ddc0e6 100644
--- a/crates/shirabe-external-packages/src/symfony/console/exception/missing_input_exception.rs
+++ b/crates/shirabe-external-packages/src/symfony/console/exception/missing_input_exception.rs
@@ -6,12 +6,16 @@ use super::runtime_exception::RuntimeException;
 #[derive(Debug)]
 pub struct MissingInputException(pub RuntimeException);
 
-impl std::fmt::Display for MissingInputException {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.0)
+impl MissingInputException {
+    pub fn new(message: String) -> Self {
+        Self(RuntimeException::new(message))
     }
 }
 
-impl std::error::Error for MissingInputException {}
+shirabe_php_shim::impl_php_exception!(
+    MissingInputException,
+    0,
+    r"Symfony\Component\Console\Exception\MissingInputException"
+);
 
 impl ExceptionInterface for MissingInputException {}
diff --git a/crates/shirabe-external-packages/src/symfony/console/exception/namespace_not_found_exception.rs b/crates/shirabe-external-packages/src/symfony/console/exception/namespace_not_found_exception.rs
index c593a3f7..31da0305 100644
--- a/crates/shirabe-external-packages/src/symfony/console/exception/namespace_not_found_exception.rs
+++ b/crates/shirabe-external-packages/src/symfony/console/exception/namespace_not_found_exception.rs
@@ -6,12 +6,16 @@ use super::exception_interface::ExceptionInterface;
 #[derive(Debug)]
 pub struct NamespaceNotFoundException(pub CommandNotFoundException);
 
-impl std::fmt::Display for NamespaceNotFoundException {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.0)
+impl NamespaceNotFoundException {
+    pub fn new(message: String, alternatives: Vec<String>, code: i64) -> Self {
+        Self(CommandNotFoundException::new(message, alternatives, code))
     }
 }
 
-impl std::error::Error for NamespaceNotFoundException {}
+shirabe_php_shim::impl_php_exception!(
+    NamespaceNotFoundException,
+    0,
+    r"Symfony\Component\Console\Exception\NamespaceNotFoundException"
+);
 
 impl ExceptionInterface for NamespaceNotFoundException {}
diff --git a/crates/shirabe-external-packages/src/symfony/console/exception/runtime_exception.rs b/crates/shirabe-external-packages/src/symfony/console/exception/runtime_exception.rs
index cfc64774..12e5b79c 100644
--- a/crates/shirabe-external-packages/src/symfony/console/exception/runtime_exception.rs
+++ b/crates/shirabe-external-packages/src/symfony/console/exception/runtime_exception.rs
@@ -5,12 +5,16 @@ use super::exception_interface::ExceptionInterface;
 #[derive(Debug)]
 pub struct RuntimeException(pub shirabe_php_shim::RuntimeException);
 
-impl std::fmt::Display for RuntimeException {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.0)
+impl RuntimeException {
+    pub fn new(message: String) -> Self {
+        Self(shirabe_php_shim::RuntimeException::new(message))
     }
 }
 
-impl std::error::Error for RuntimeException {}
+shirabe_php_shim::impl_php_exception!(
+    RuntimeException,
+    0,
+    r"Symfony\Component\Console\Exception\RuntimeException"
+);
 
 impl ExceptionInterface for RuntimeException {}