Show diff snippet when user rejects a Codex action

What feature would you like to see?

Currently, when I deny an action in Codex (e.g., file update), it doesn’t display the related diff or snippet. It would be useful to still show a short preview like:

⏺ Update(Cargo.toml)                              
  ⎿  User rejected update to Cargo.toml
        4    edition = "2024"                        
        5                               
        6    [dependencies]
        7 +  anyhow = "1.0"
        8    axum = { version = "0.8.6", features = ["macros"] }
        9    clap = { version = "4.5.51", features = ["derive"] }                                                                                                                                                                             
       10    tokio = { version = "1.48.0", features = ["full"] }             

This would help users recall what exactly was rejected and why, especially if the session gets interrupted or reviewed later.

Additional information

_No response_