[FEATURE] Bedrock model selection using key combination similar to Shift + Tab

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I'd like to have more flexibility which Bedrock model I use for a given message sent to LLM (sonnet / haiku).

Proposed Solution

Let user define 1+ Bedrock model in config and switch models with keyboard shortcut similar to switching mode using Shift + Tab.

Alternative Solutions

_No response_

Priority

Medium - Would be very helpful

Feature Category

Interactive mode (TUI)

Use Case Example

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Additional Context

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