fix: gate macOS-only keyboard_layout symbols behind cfg (#831)

* fix: gate macOS-only keyboard_layout symbols behind cfg to suppress dead_code warnings

* chore: sync bun.lock with package.json

tauri/src-tauri/src/keyboard_layout.rs

@@ -19,19 +19,23 @@
 //! regardless of the active layout — most Windows apps treat that as
 //! Ctrl+V. AutoHotkey relies on the same behaviour.
 
+#[cfg(target_os = "macos")]
 use std::sync::atomic::{AtomicU16, Ordering};
 
 /// `kVK_ANSI_V` — the keycode for the physical V key on a US QWERTY
 /// layout. Used as the fallback whenever live resolution can't produce a
 /// better answer (no Unicode key layout data, lookup failure, non-macOS).
+#[cfg(target_os = "macos")]
 const FALLBACK_V_KEYCODE: u16 = 9;
 
+#[cfg(target_os = "macos")]
 static V_KEYCODE: AtomicU16 = AtomicU16::new(FALLBACK_V_KEYCODE);
 
 /// Returns the keycode whose current-layout translation is `'v'`. Falls
 /// back to `kVK_ANSI_V` when resolution hasn't run, the active input
 /// source carries no Unicode key layout data, or no keycode in the layout
 /// produces `v`.
+#[cfg(target_os = "macos")]
 pub fn paste_keycode_v() -> u16 {
     V_KEYCODE.load(Ordering::Relaxed)
 }