Custom logos are displayed larger than expected

[andrewleith]

Describe the bug

Notify gives specific instructions for users to size their logos when they upload them, but when they follow them, the logo ends up larger than expected.

Note: If we fix this, we need to think about how to handle existing logos. We could either go back and fix them all, or perhaps only re-size images properly going forward.

If we can’t change how logos are displayed, we could instead change our instructions.

Instructions:

Your logo must be compatible with GC Notify. Check logo is:

In PNG image format
Exactly 108 pixels tall
Maximum 600 pixels wide

Result:

However, it should look like this:

SEV-4 Low

To Reproduce

Steps to reproduce the behavior:

1. Upload a custom logo and follow the sizing instructions
2. Logo is larger than expected

Expected behavior

• Logo should be the same size as image uploaded

Impact

Impact on Notify users:

• This could confuse users, reduce their trust in the product

Impact on Recipients:

• If not corrected, the emails can look unprofessional, which could reduce/erode trust

Impact on Notify team:

• Causes extra work to handle support cases, fix logos, etc.

[whabanks]

We had another instance of this bug causing issues with banner resizing: https://gcdigital.slack.com/archives/C03FA4DJCCU/p1730803609010149

[yaelberger-commits]

Temp fix is to use #FFFFFF background and select "Custom logo on a background colour"