LID tagging fix — ensure phone numbers are used for @mentions

[SilvaTechB]

Description

When WhatsApp linked devices use LID JIDs (@lid suffix), mentions/tags display LID numbers instead of phone numbers. The resolveLid() helper and resolvedFrom context field have been added to handler.js and leveling.js.

Tasks

• Add resolvedFrom, senderNum, resolveLid() to handler.js context
• Fix level-up announcements in handler.js
• Update leveling.js to use LID-safe helpers
• Audit remaining plugins for sender.split('@')[0] patterns
• Add LID resolution to welcome/goodbye messages

Impact

Affects all users on linked devices in groups.