chore: add in-app feedback entry point

[2sem]

Goal

Add an easy way for users to send feedback from inside the app so post-release issues can be captured faster.

Scope

• Add a visible feedback entry point in the main app UI or settings/help area
• Support a simple action such as email, form link, or issue/report flow
• Keep implementation lightweight and low-risk for a patch release

Acceptance Criteria

• A user can discover and open the feedback flow from within the app
• The path works on device without blocking the main translation flow
• Any unavailable channel is handled gracefully

Why

This supports 2.2.1 stabilization and faster user feedback loops.