Inline AI Suggestions is competing with CLI Completions

### 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 15.2.0 (24C101)

### Expected behaviour

If both Inline and CLI Completions are enabled, I would expect that the CLI Completions menu would not be closed due to an Inline suggestion being populated.

### Actual behaviour

I start typing a command, CLI Completion menu appears, then an Inline suggestion appears, which causes the CLI Completions menu to close.

https://github.com/user-attachments/assets/0b20439c-2d2b-4a49-941d-4fcf2ce4c545

### Steps to reproduce

Simply enable both features, open a zsh terminal, and type in a command that will both populate a CLI Completion and an inline suggestion.

### Environment

```yaml
[q-details]
version = "1.21.0"
hash = "dc54efd85f411d6b4347d192733ff40650d38dfb"
date = "2025-11-26T22:31:44.946762Z (7d ago)"
variant = "full"

[system-info]
os = "macOS 15.2.0 (24C101)"
chip = "Apple M1 Pro"
total-cores = 10
memory = "32.00 GB"

[environment]
cwd = "/Users/USER"
cli-path = "/Users/USER"
os = "Mac"
shell-path = "/bin/bash"
shell-version = "3.2.57"
terminal = "iTerm 2"
install-method = "unknown"

[env-vars]
PATH =
QTERM_SESSION_ID = "8e592f448f3e432abcb88a65e2bc4264"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.21.0"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.googlecode.iterm2"
```

Beginne in einem zsh-Terminal, indem du sowohl Inline AI Suggestions als auch CLI Completions aktivierst, und führe dann q doctor und q restart aus, bevor du die konkurrierenden Vorschläge reproduzierst. Verfolge die Einstiegspunkte für das im Bericht beschriebene CLI Completions-Menü und die Inline suggestion; abgeschlossen ist die Aufgabe, wenn das Erscheinen einer Inline suggestion das CLI Completions-Menü nicht mehr schließt.

Vom Indexierungsmodell aus dem Issue-Text verfasst.