Fix traffic light padding on macOS SDK 26+ builds

crates/title_bar/src/title_bar.rs

@@ -659,7 +659,7 @@ impl TitleBar {
                 })
             });
 
-        if cfg!(macos_sdk_26) {
+        if ui::utils::MACOS_SDK_26_OR_LATER {
             // Make up for Tahoe's traffic light buttons having less spacing around them
             Some(div().child(button).ml_0p5().into_any_element())
         } else {

crates/title_bar/build.rs → crates/ui/build.rs

@@ -1,7 +1,7 @@
 #![allow(clippy::disallowed_methods, reason = "build scripts are exempt")]
 
 fn main() {
-    println!("cargo::rustc-check-cfg=cfg(macos_sdk_26)");
+    println!("cargo::rustc-check-cfg=cfg(macos_sdk_26_or_later)");
 
     #[cfg(target_os = "macos")]
     {
@@ -22,7 +22,7 @@ fn main() {
         if let Some(major) = major_version
             && major >= 26
         {
-            println!("cargo:rustc-cfg=macos_sdk_26");
+            println!("cargo:rustc-cfg=macos_sdk_26_or_later");
         }
     }
 }

crates/ui/src/utils/constants.rs

@@ -1,15 +1,13 @@
 use gpui::{Pixels, Window, px};
 
+pub const MACOS_SDK_26_OR_LATER: bool = cfg!(macos_sdk_26_or_later);
+
 // Use pixels here instead of a rem-based size because the macOS traffic
 // lights are a static size, and don't scale with the rest of the UI.
 //
 // Magic number: There is one extra pixel of padding on the left side due to
 // the 1px border around the window on macOS apps.
-#[cfg(macos_sdk_26)]
-pub const TRAFFIC_LIGHT_PADDING: f32 = 78.;
-
-#[cfg(not(macos_sdk_26))]
-pub const TRAFFIC_LIGHT_PADDING: f32 = 71.;
+pub const TRAFFIC_LIGHT_PADDING: f32 = if MACOS_SDK_26_OR_LATER { 78. } else { 71. };
 
 /// Returns the platform-appropriate title bar height.
 ///