add OhMyDebn features via --ohmydebn flag

[dougburks]

Hello @bjarneo !

I used some tokens to create a first draft of a new --ohmydebn flag that would add some features specific to OhMyDebn. Tried to make sure that default behavior is not changed when that flag is not passed.

Interested in any thoughts you may have! Thanks in advance for your time and consideration!

Here is an overview of the changes:

CLI Flag

• Added --ohmydebn command-line option in AetherApplication.js

Default Tab & View

• Starts on Themes tab and System Themes section when --ohmydebn is passed

GTK Theme Application

• Skips applying custom Aether theme CSS when in OhMyDebn mode
• Loads GTK4 theme from ~/.themes//gtk-4.0/gtk.css (generated by OhMyDebn)
• Sets up file monitor to auto-reload theme when themes are regenerated
• Falls back to reading colors.toml if GTK4 theme not found

UI Changes

• "Omarchy Themes" label changed to "System Themes" in OhMyDebn mode
• Themes view clamp expanded from 900px to 1600px for wider displays
• Responsive columns (2-12) based on available width

Theme Card Features

• Themes without colors.toml are now shown (Import button disabled)
• Buttons aligned at bottom of cards
• Themes with multiple images show "Next Image" button to cycle thumbnails
• Current active theme thumbnail will not show preview.png but only background images so it stays in sync the actual desktop background image

[bjarneo]

Instead, let us rename it to System Themes, does not have to be named "Omarchy Themes"

[bjarneo]

I understand what you are trying to achieve here, Doug. I am not sure about the approach.
Would it be better to have a few other cli flags that solve this, vs passing --ohmydeb?

I.e. Default Tab & View, could be --focus-themes

[dougburks]

Thanks for taking the time to review @bjarneo !

I did actually have an earlier version that had different cli flags. I wasn't sure how much of my changes would be applicable to non-OhMyDebn users so figured we'd start with the one flag just so you could easily see what I was trying to achieve and then we could come to an agreement about the right way to do all of this.

I'm happy to re-work this. Do you want me to continue making changes in this PR or close it and break out into separate PRs?

[bjarneo]

Can we put it on hold for a week or two? I am rewriting the entire Aether to https://github.com/wailsapp/wails. GTK has its limitations UI-wise, and I am done working around them. Better Aether is coming!

[dougburks]

OK no problem.