Theme and display mic icon only if suggestion is available

Description

"/e/OS v2.10-rc" support dark mode, reduce button size & display button in relevant circumtances

Screenshots

Technical details

Tests

Issues

• https://gitlab.e.foundation/e/os/backlog/-/issues/3312+
• https://gitlab.e.foundation/e/os/backlog/-/issues/3066+
• https://gitlab.e.foundation/e/os/backlog/-/issues/3323+

10 commandments of code reviews

👪 ❤️ https://gitlab.e.foundation/internal/wiki/-/wikis/mobile-team/guidelines/Code-review