Hey, I had my struggles with app icons as well when I wrote a small app for myself so I am not really equipped to create the PR (also due to current time limitations). If no one is found for that, I can give it a shot at the end of the year, but I am sure you will find someone sooner than that.
However, I know of a free icon website and have looked through their icons to suggest a few to you:
- Simple Eye https://uxwing.com/view-icon/
- Thin line art eye https://uxwing.com/see-icon/
- Eye in "scanning square" (corners of a square are hinted, the eye is inside; typical "scanning square" for qr code scanners) https://uxwing.com/eye-scanning-icon/
- Binoculars https://uxwing.com/binoculars-icon/
- Spectacles https://uxwing.com/spectacles-icon/
- Happy man with VR glasses https://uxwing.com/virtual-reality-vr-icon/
- Old video recorder https://uxwing.com/video-camera-icon/
- Square with red dot insids and text record https://uxwing.com/screen-recorder-icon/
Uxwings license is amazing: https://uxwing.com/license/ you can use the icons for basically anything and can even alter them.
Personally, I like "Eye in "scanning square"" the most as it symbolizes the technical aspect of scanning/capturing the surroundings.
While I haven't used it yetis, there is also https://icon.kitchen/ for icon generation.
Yes, it is absolutely valid that you decided to commercialise your project and keeping parts or all of the code closed. As I work in the public sector and we are encouraged to use open source and write open source software, my knowledge regarding closed software solutions is thin. Is there a "standard way" how closed software is able to guarantee private key safety? I could imagine solutions where there is a separate handler that is open source so that one can verify that only specific information is passed into the closed software area, but this doesn't sound feasible when talking about full terminal support within the closed software.
Again, there is nothing wrong with going commercial! I am sure I will release closed software (side projects), too, at some point.