fix(desktop): disable magnification gestures on macOS (#10605)

packages/desktop/src-tauri/Cargo.lock

@@ -3028,6 +3028,8 @@ dependencies = [
  "futures",
  "gtk",
  "listeners",
+ "objc2 0.6.3",
+ "objc2-web-kit",
  "reqwest",
  "semver",
  "serde",

packages/desktop/src-tauri/Cargo.toml

@@ -47,6 +47,10 @@ comrak = { version = "0.50", default-features = false }
 gtk = "0.18.2"
 webkit2gtk = "=2.0.1"
 
+[target.'cfg(target_os = "macos")'.dependencies]
+objc2 = "0.6"
+objc2-web-kit = "0.3"
+
 [target.'cfg(windows)'.dependencies]
 windows = { version = "0.61", features = [
     "Win32_Foundation",

packages/desktop/src-tauri/src/window_customizer.rs

@@ -29,6 +29,18 @@ impl<R: Runtime> Plugin<R> for PinchZoomDisablePlugin {
                     gobject_ffi::g_signal_handlers_destroy(data.as_ptr().cast());
                 }
             }
+
+            #[cfg(target_os = "macos")]
+            unsafe {
+                use objc2::rc::Retained;
+                use objc2_web_kit::WKWebView;
+
+                // Get the WKWebView pointer and disable magnification gestures
+                // This prevents Cmd+Ctrl+scroll and pinch-to-zoom from changing the zoom level
+                let wk_webview: Retained<WKWebView> =
+                    Retained::retain(_webview.inner().cast()).unwrap();
+                wk_webview.setAllowsMagnification(false);
+            }
         });
     }
 }