style: apply cargo fmt

No behavior changes. Brings three files back in line with the
project's `style_edition = "2024"` rustfmt config so subsequent
edits don't carry unrelated formatting in their diffs.

lan-mouse-gtk/src/lib.rs

@@ -219,9 +219,7 @@ fn build_ui(app: &Application) {
                 }
             }
             macos_privacy::AccessibilityChange::Revoked => {
-                log::warn!(
-                    "Accessibility revoked — quitting to avoid wedging system input"
-                );
+                log::warn!("Accessibility revoked — quitting to avoid wedging system input");
                 if let Some(app) = app_weak.upgrade() {
                     app.quit();
                 }
@@ -291,4 +289,3 @@ fn build_ui(app: &Application) {
         window.present();
     }
 }
-

lan-mouse-gtk/src/macos_privacy.rs

@@ -73,7 +73,6 @@ pub fn accessibility_granted() -> bool {
     raw != 0
 }
 
-
 pub enum AccessibilityChange {
     /// AX was missing at startup and the user has now granted it.
     /// Capture/emulation still need a relaunch to take effect, since