Align home top bar background with the sidebar color to keep the shell visually consistent.

This removes the mismatched strip tint so both surfaces appear as a single unified panel.

Made-with: Cursor

zoom_app/ViewController.swift

@@ -677,7 +677,7 @@ class ViewController: NSViewController {
 
         let topBar = NSView()
         topBar.wantsLayer = true
-        topBar.layer?.backgroundColor = topStripBackground.withAlphaComponent(0.88).cgColor
+        topBar.layer?.backgroundColor = appShellBackground.withAlphaComponent(0.98).cgColor
         
         let topBarDivider = NSView()
         topBarDivider.wantsLayer = true