Arabic account settings still have untranslated strings and empty select state label

Description:

Arabic (ar) translations are missing in multiple Account settings screens.
Also, in Preferences -> Global, when the multiselect has no options, the dropdown empty state falls back to Empty unless explicitly localized.

Steps to reproduce:

1. Set language to Arabic.
2. Open:
   • /account/profile
   • /account/preferences
   • /account/security
   • /account/tokens
   • /account/omnichannel
   • /account/accessibility-and-appearance
3. In Preferences -> Global, open the "Don't ask me again list" multiselect when there are no options.

Video demo of the issue:

https://github.com/user-attachments/assets/73f65ddc-9f7c-428b-92b0-c8e561ca9781

Expected behavior:

All account settings labels/messages are translated to Arabic, and empty dropdown state is localized.

Actual behavior:

Several labels/messages appeared in English, and empty multiselect state could display Empty.

Server Setup Information:

• Version of Rocket.Chat Server: develop (local)
• License Type:
• Number of Users:
• Operating System:
• Deployment Method:
• Number of Running Instances:
• DB Replicaset Oplog:
• NodeJS Version:
• MongoDB Version:

Client Setup Information

• Desktop App or Browser Version:
• Operating System:

Additional context

Fix branch:
i18n/ar-account-translations-and-empty-select-global

Relevant logs:

N/A

Set the interface to Arabic and inspect the account settings routes listed in the reproduction steps, then open Preferences → Global with no multiselect options. Identify the Arabic strings still shown in English and the empty-state label. Done means those account settings messages and the empty dropdown state are localized and the listed flows no longer show English fallbacks.