Custom SVG emojis are converted to png and they look blurry

Description:

You can upload emojis in svg, but they are converted to png and look blurry.

Tested from the electron app and native web app via Chrome.

Emojis seem to look fine in an Android app, but I didn't debug the output.

Steps to reproduce:

1. Create a custom emoji and upload svg icon of your choice.
2. Post this emoji to some channel.
3. Emoji is posted, but it doesn't look sharp because it's converted to png.

Expected behavior:

1. To be able to see sharp emoji in a native svg.

Actual behavior:

1. Emoji is posted, but it doesn't look sharp because it's converted to png.
   

Server Setup Information:

• Version of Rocket.Chat Server: 4.1.1
• Operating System: Ubuntu 18.04
• Deployment Method: Docker image
• Number of Running Instances: 1
• DB Replicaset Oplog: rs0
• NodeJS Version: 1.28.1
• MongoDB Version: 4.0.12 / mmapv1

Client Setup Information

• Desktop App or Browser Version: Desktop App, 3.6.6

• Operating System: Windows 11

Additional context

• No additional context.

Relevant logs:

No logs at that time.

No file or test is named. Reproduce the upload-and-post flow in the web and Electron clients, then trace the custom emoji upload and display entry points to find where SVG becomes PNG; done means uploaded SVG emojis remain sharp in the affected clients with coverage for the reported flow.