fix(background-agent): pass model on resume to preserve category config#846

GollyJer merged 1 commit intocode-yeongyu:devcode-yeongyu/oh-my-opencode:devfrom

LTS2:fix/826-sisyphus-junior-model-overrideLTS2/oh-my-opencode:fix/826-sisyphus-junior-model-overrideCopy head branch name to clipboard