[ui-ux]:: `ChatUserProfile.kt` has no side mail button, so users cannot open the phone's mail app from profile

In ChatUserProfile.kt, the email is displayed in a non-editable TextView, and the layout activity_chat_user_profile.xmlrenders it as a full-width field with an inline email icon:

etemail.isFocusable = false
etemail.isFocusableInTouchMode = false
etemail.isClickable = true

<TextView
    android:id="@+id/etemail"
    android:layout_width="match_parent"
    android:drawableLeft="@drawable/baseline_email_24" />

But there is no setOnClickListener that launches an email intent such as Intent(Intent.ACTION_SENDTO, Uri.parse("mailto:...")). The profile screen therefore presents the email like an interactive contact action, yet tapping it does nothing. This is especially confusing because the app already exposes the user's email on the profile page and users expect contact details to be actionable on mobile.

Current Behavior:
The email remains read-only, but there is no separate side button to contact the user by mail.

Expected Behavior:
The email text should remain non-editable, and a mail button beside it should open the device's default mail app with the recipient prefilled.

Start with ChatUserProfile.kt and activity_chat_user_profile.xml, where the read-only email field and its current layout are defined. Inspect the existing profile setup and add the requested side mail action without making the email editable. Done means the profile shows a separate mail button and tapping it opens the device's default mail app with the user's address prefilled.