Fix clippy warnings and format code

Author: asaaki

.peas/memory/pre-commit-checks.md

@@ -0,0 +1,7 @@
++++
+key = "pre-commit-checks"
+created = "2026-02-02T19:59:23.321662900Z"
+updated = "2026-02-02T19:59:23.321662900Z"
++++
+
+Always run clippy and fmt before committing and pushing. Use 'just lint' to check or 'just fix' to auto-fix. This ensures CI passes on GitHub Actions.