Modify terminal tab bar location in titlebar

Looking at the code, changing it to use a top accessory view instead of the current approach wouldn't work well. The current implementation doesn't use layoutAttribute = .bottom - it uses .right (line 59) and then manually repositions the tab bar into the toolbar using constraints.

To move tabs into the titlebar above the toolbar, you'd want:

1. Change layoutAttribute = .right to .top (line 59)
2. Remove the constraint-based repositioning logic (lines 123-153)
3. Adjust fullSizeContentView = true if not already set
4. Handle the window button overlap differently

However, this approach has tradeoffs:

• Top accessory: Tabs sit above the titlebar (macOS default), creating a separate visual layer
• Current approach: Tabs are embedded within the titlebar itself, creating a unified appearance like Safari

The current implementation gives you the integrated titlebar tabs look. A top accessory would feel more like a traditional tabbed window. Which style are you aiming for?

Done! Changed to use .top layout and removed the constraint manipulation that was embedding tabs into the toolbar. The tabs will now appear as a standard top accessory view above the titlebar.