feat(channel): enhance pushName logic for messages

[gomessguii]

• Updated the pushName selection to differentiate between group and individual messages.
• Added conditional logic to display the chat name for group messages and the sender's name for individual messages.

Summary by Sourcery

Enhance pushName logic to differentiate between group and individual messages and adjust outgoing message name display

Enhancements:

• Use group chat name for pushName in group messages and fallback to contact or message name for individual messages
• Display 'Você' as the lastMessagePushName for messages sent by the current user

[sourcery-ai]

Reviewer's Guide

Introduces conditional logic in the channel service to select appropriate display names: using the chat’s name for group messages or the contact’s pushName/message pushName for individual chats, and replacing the lastMessagePushName with “Você” for outgoing messages.

File-Level Changes

Change	Details	Files
Differentiate pushName between group and individual messages	Replaced COALESCE with a CASE on remoteJid ending in '@g.us' Use Chat.name for group message names, fallback to Contact.pushName or Message.pushName Retained original logic for individual messages	src/api/services/channel.service.ts
Override lastMessagePushName for outgoing messages	Replaced direct Message.pushName with CASE when fromMe = 'true' Display static “Você” for outgoing messages, fallback to Message.pushName for incoming	src/api/services/channel.service.ts

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