## Description
This introduces a reusable Call button used in the Contacts details
header (between Block contact and Send message) and
in the conversation contact panel. The button shows only when the
account has at least one Voice inbox and the contact
has a phone number. If multiple Voice inboxes are present, clicking
opens a picker modal; otherwise, a “Calling is under
development” toast is shown
> Actual wiring to functionality will available in follow up PRs
references: #11602 , #11481
## Screens
<img width="250" alt="Screenshot 2025-08-18 at 8 33 02 PM"
src="https://github.com/user-attachments/assets/d7a09a9d-8eff-4461-a75f-27854540c2a0"
/>
<img width="250" alt="Screenshot 2025-08-18 at 8 32 31 PM"
src="https://github.com/user-attachments/assets/682ae66e-dd5f-4750-9c30-0a210e120250"
/>
<img width="250" alt="Screenshot 2025-08-18 at 8 32 40 PM"
src="https://github.com/user-attachments/assets/7de0d753-eefc-4b7f-942b-ecca1964fcd7"
/>
## Test Cases
- Enable voice feature and create inboxes and test the cases for both
contact details view and contact card view in conversation
- Details: 0 Voice inboxes → no Call button.
- Details: 1+ Voice inboxes, no phone number for contact → no Call
button.
- Details: 1 Voice inbox + phone number for contact → button visible;
click → toast.
- Details: >1 Voice inboxes + phone number for contact → click → modal →
choose → toast.
---------
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
