Help with redesigning the Cockpit web interface

[Rider03rus]

Hello everyone
I just recently started learning about cockpit and linux in general. It's been about 3 months since I started doing this. I want to redesign the web interface to make it "unique" for myself. No matter how much I tried, the most I achieved was reworking the authorization page and repainting links and buttons, and not everywhere(you can see the photo below, how it looks now). There's a lot more I'd like to do, but I just don't understand how. I've already tried everything and read all kinds of README.MD and HACKING.MD . The gpt chat also can't tell me anything useful. Please help!
An example of what I want to do: there is an overview tab that contains a gallery of four cards: health, usage, system information, and settings. There are two scales in the usage chart - CPU usage and memory usage. I would like to replace the linear scales with ring diagrams so that the percentages of the load are shown inside, and its name (CPU or memory) is below the diagram.

[Venefilyn]

Heya!

There is a few things here so I'll break them down a bit :)

TL;DR:

• Login page is styled separately from the application itself due to dependencies
• Cockpit recently upgraded to Patternfly v6 so we now have different selectors. It is also no easy way to load in styling separately at the moment (feel free to suggest an RFE issue!)
• Changing the gallery styling is easy in general but modifying the charts makes it a lot more complicated and more or less means you need to build Cockpit yourself

For spinning up a dev environment locally, what issues are you running into?

[Rider03rus]

Using the instructions from HACKING.MD, after executing the "make" command, the project is being built. After that, I start the "watch" mode and watch the terminal. In the process of changing any files, even on the most elementary example, the terminal displays an error.:
18:21:49: Build finished
change detected: pkg/systemd/overview.jsx~
change detected: pkg/systemd/overview.jsx
change detected: pkg/systemd/overview.jsx
✘ [ERROR] The build was canceled

✘ [ERROR] The build was canceled

18:21:57: Build finished
18:22:09: Build finished
but at the same time, nothing changes in the browser page, even after updating, and the project is still "building", even after errors.