minor comment changes

macos/Sources/Ghostty/SurfaceView_AppKit.swift

@@ -480,12 +480,15 @@ extension Ghostty {
             let pos = self.convert(event.locationInWindow, from: nil)
             ghostty_surface_mouse_pos(surface, pos.x, frame.height - pos.y)
 
-            if let window = self.window as? TerminalWindow {
-                if !self.focused && window.focusFollowsMouse {
+            // If focus follows mouse is enabled then move focus to this surface.
+            if let window = self.window as? TerminalWindow,
+               window.isKeyWindow &&
+                window.focusFollowsMouse &&
+                !self.focused
+            {
                 Ghostty.moveFocus(to: self)
             }
         }
-        }
 
         override func mouseDragged(with event: NSEvent) {
             self.mouseMoved(with: event)

src/config/Config.zig

@@ -421,12 +421,6 @@ command: ?[]const u8 = null,
 /// This is primarily useful for scripts or debugging.
 @"wait-after-command": bool = false,
 
-// If true, when there are multiple split panes, the mouse selects the pane
-// that is focused.
-//
-// Default is false.
-@"focus-follows-mouse": bool = false,
-
 /// The number of milliseconds of runtime below which we consider a process exit
 /// to be abnormal. This is used to show an error message when the process exits
 /// too quickly.
@@ -753,6 +747,14 @@ keybind: Keybinds = .{},
 /// This configuration currently only works with GTK.
 @"window-new-tab-position": WindowNewTabPosition = .current,
 
+// If true, when there are multiple split panes, the mouse selects the pane
+// that is focused. This only applies to the currently focused window; i.e.
+// mousing over a split in an unfocused window will now focus that split
+// and bring the window to front.
+//
+// Default is false.
+@"focus-follows-mouse": bool = false,
+
 /// When enabled, the full GTK titlebar is displayed instead of your window
 /// manager's simple titlebar. The behavior of this option will vary with your
 /// window manager.