• Merge pull request #557 from kaitranntt/feat/556-codex-53-preset-default
• feat(codex): use spark as haiku in 5.3 preset
• fix(codex): type cast provider in model update path
• fix(codex): preserve sonnet high alias on variant model updates
• fix(codex): preserve xhigh default effort for gpt-5.3
• feat(codex): keep gpt-5.2 catalog entry
• feat(codex): add gpt-5.3 preset defaults