feat(app): add header tooltips + shortcuts (#16)

packages/app/src/utils/shortcut-platform.ts

@@ -0,0 +1,18 @@
+import { Platform } from "react-native";
+import { getIsTauriMac } from "@/constants/layout";
+import type { ShortcutOs } from "@/utils/format-shortcut";
+
+export function getShortcutOs(): ShortcutOs {
+  if (Platform.OS !== "web") {
+    return Platform.OS === "ios" ? "mac" : "non-mac";
+  }
+  if (getIsTauriMac()) return "mac";
+  if (typeof navigator === "undefined") return "non-mac";
+  const ua = navigator.userAgent ?? "";
+  const platform = (navigator as any).platform ?? "";
+  const isApple =
+    /Macintosh|Mac OS|iPhone|iPad|iPod/i.test(ua) ||
+    /Mac|iPhone|iPad|iPod/i.test(platform);
+  return isApple ? "mac" : "non-mac";
+}
+