bug: Asking for permission is not aborted when running /clear

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue
- [x] I have run `q doctor` in the affected terminal session
- [x] I have run `q restart` and replicated the issue again

### Operating system

MacOS

### Expected behaviour

When Q CLI is asking for permission to run a tool (y/n/t) and I answer with `/clear` I expect the tool use to be aborted.

### Actual behaviour

After `/clear` the permission prompt is repeated.

### Steps to reproduce

- `q chat`
- Ask for something that Q needs to ask permission for. `Write a haiku about permissoins in the file "haiku.md" in the current directory"
- You should get: "Allow this action? Use 't' to trust (always allow) this tool for the session. [y/n/t]:"
- Respond with `/clear`
- The permission prompt is repeated instead of aborted

### Environment

```yaml
[q-details]
version = "1.15.0"
hash = "eb8db5c635fc469f3bd94ead16bb4bfb32d7443b"
date = "2025-09-02T17:57:24.662205Z (2d ago)"
variant = "full"

[system-info]
os = "macOS 15.6.1 (24G90)"
chip = "Apple M2 Max"
total-cores = 12
memory = "64.00 GB"

[environment]
os = "Mac"
shell-path = "/bin/zsh"
shell-version = "5.9"
terminal = "iTerm 2"
install-method = "unknown"

[env-vars]
PATH = "/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Applications/VMware Fusion.app/Contents/Public:/Applications/iTerm.app/Contents/Resources/utilities:/Users/USER/.local/bin:/Users/USER/.krew/bin:/Applications/PhpStorm.app/Contents/MacOS:~.local/bin"
QTERM_SESSION_ID = "cc25d16769a34442b980369582024550"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.15.0"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.googlecode.iterm2"
```