keybindings.json not being honored for intput.submit and input.newline

### What happened?

This does not work as expected

```jsonc
[
{
// unbind defaults for input.newline
"command": "-input.newline",
"keys": [
"alt+enter",
"ctrl+enter",
"shift+enter",
"ctrl+j"
]
},
{
// unbind default for input.submit
"command": "-input.submit",
"key": "enter"
},
{
// create newline with enter
"command": "input.newline",
"key": "enter"
},
{
// submit prompt with ctrl+enter
"command": "input.submit",
"key": "ctrl+enter"
}
]
```

### What did you expect to happen?

I want `enter` to create a newline and `ctrl+enter` to submit the prompt.

### Client information

Client Information

Run `gemini` to enter the interactive CLI, then run the `/about` command.

```console
│ About Gemini CLI
│ CLI Version 0.33.2
│ Git Commit cc5a0dc3c
│ Model Auto (Gemini 3)
│ Sandbox no sandbox
│ OS linux │
│ Auth Method Logged in with Google (*@gmail.com)
│ Tier Gemini Code Assist in Google One AI Pro
```

### Login information

_No response_

### Anything else we need to know?

_No response_