This is annoyingly easy to trigger, just disable this.

### This pr fixes multiple issues related to `macos-titlebar-tabs`

- [Window title clipping **on
Tahoe**](https://github.com/ghostty-org/ghostty/discussions/9027#discussion-8981483)
- Clipped tab bar **on Tahoe** when creating new ones in fullscreen
> Sequoia doesn't seem to have this issue (at least I didn't reproduce
myself)
- [Title missing **on Tahoe** after dragging a tab into a separate
window](https://github.com/ghostty-org/ghostty/discussions/9027#discussioncomment-14617088)
- [Clipped tab bar **on Tahoe** after dragging from one tab group to
another](https://github.com/ghostty-org/ghostty/discussions/9027#discussioncomment-14626078)
- [Stretched tab bar after switching system
appearance](https://github.com/ghostty-org/ghostty/discussions/9027#discussioncomment-14626918)


### Related issues
I checked all of the open sub-issues in #2349 , most of them should be
fixed in latest main branch (I didn't reproduce)

- [#1692](https://github.com/ghostty-org/ghostty/issues/1692)
@peteschaffner
- [#1945](https://github.com/ghostty-org/ghostty/issues/1945) this one I
reproduce only on Tahoe, and fixed in this pr, @injust
- [#1813](https://github.com/ghostty-org/ghostty/issues/1813) @jacakira
- [#1787](https://github.com/ghostty-org/ghostty/issues/1787)
@roguesherlock
- [#1691](https://github.com/ghostty-org/ghostty/issues/1691) ~**haven't
found a solution yet**(building zig on VM is a pain**)~
> Tried commenting out `isOpaque` check in
`TitlebarTabsVenturaTerminalWindow`, which would fix the issue, but I
see the note there about transparency issue.
  >
> After commenting it out, it worked fine for me with blur and opacity
config, so **I might need some more background on this**. Didn't include
this change yet.
  > 
> [See screenshot
here](https://github.com/user-attachments/assets/eb17642d-b0de-46b2-b42a-19fb38a2c7f0)



### Minor improvements

- Match window title style with `window-title-font-family` and focus
state
  
<img width="843" height="198" alt="image"
src="https://github.com/user-attachments/assets/0138c4fa-1a4b-4bab-a415-b32695899ccf"
/>

---------

Co-authored-by: Mitchell Hashimoto <m@mitchellh.com>

Maybe fixes #8736

I thought `windowDidLoad` was early on because its before the window is
shown but apparently not. Let's try `awakeFromNib` which is called
just after the window is loaded from the nib. It is hard to get any
earlier than that.