refactor: narrow pub(crate) items to private

Porting mapped every PHP `protected` member onto `pub(crate)`, which is
wider than nearly all of them need. Each item demoted here is reached
only from the module that defines it, so the crate-wide visibility
conveyed nothing.

Every `pub(crate)` that survives has at least one reader in another
module of the same crate.

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

1 files changed, 3 insertions, 5 deletions

diff --git a/crates/shirabe/src/command/diagnose_command.rs b/crates/shirabe/src/command/diagnose_command.rs
index 451b051c..4b148c09 100644
--- a/crates/shirabe/src/command/diagnose_command.rs
+++ b/crates/shirabe/src/command/diagnose_command.rs
@@ -50,11 +50,9 @@ use shirabe_symfony_process::ExecutableFinder;
 pub struct DiagnoseCommand {
     base_command_data: BaseCommandData,
 
-    pub(crate) http_downloader:
-        std::cell::RefCell<Option<std::rc::Rc<std::cell::RefCell<HttpDownloader>>>>,
-    pub(crate) process:
-        std::cell::RefCell<Option<std::rc::Rc<std::cell::RefCell<ProcessExecutor>>>>,
-    pub(crate) exit_code: std::cell::Cell<i64>,
+    http_downloader: std::cell::RefCell<Option<std::rc::Rc<std::cell::RefCell<HttpDownloader>>>>,
+    process: std::cell::RefCell<Option<std::rc::Rc<std::cell::RefCell<ProcessExecutor>>>>,
+    exit_code: std::cell::Cell<i64>,
 }
 
 impl_php_class!(DiagnoseCommand, r"Composer\Command\DiagnoseCommand");