[FEATURE] Option to restore legacy click-to-cycle behavior for Edit Mode selector

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

The Edit Mode selector (Auto / Ask / Plan) recently changed from a single-click cycle to a dropdown menu. The previous behavior — clicking the button to cycle through modes one at a time — was faster and required less precise interaction: one click with no extra UI layer.

The new dropdown adds an extra interaction step for what is a frequent, low-friction action during active editing sessions:

<img width="237" height="181" alt="Image" src="https://github.com/user-attachments/assets/aed1c846-1450-44b7-a247-8a21595aec77" />

Users who preferred the legacy pattern have no way to opt back in.

Proposed Solution

Add a setting such as "editModeSelectorStyle": "cycle" | "dropdown" that lets users choose their preferred interaction model. With "cycle", clicking the mode button would behave as before — cycling through Auto → Ask → Plan → Auto. The dropdown remains the default for new users since it's more discoverable, but power users can opt into the faster legacy experience.

Alternative Solutions

_No response_

Priority

Low - Nice to have

Feature Category

Interactive mode (TUI)

Use Case Example

_No response_

Additional Context

_No response_