feat: added keyboard shortcut indication

utils.ts

@@ -0,0 +1,39 @@
+import { OS } from "@/types/os";
+
+export function getOS(): OS {
+    const userAgent = window.navigator.userAgent;
+    const platform = (window.navigator as any)?.userAgentData?.platform || window.navigator.platform;
+
+    const macosPlatforms = ['Macintosh', 'MacIntel', 'MacPPC', 'Mac68K', 'macOS'];
+    const windowsPlatforms = ['Win32', 'Win64', 'Windows', 'WinCE'];
+    const iosPlatforms = ['iPhone', 'iPad', 'iPod'];
+
+    if (macosPlatforms.includes(platform)) {
+        return 'macos';
+    } else if (iosPlatforms.includes(platform)) {
+        return 'ios';
+    } else if (windowsPlatforms.includes(platform)) {
+        return 'windows';
+    } else if (/Android/.test(userAgent)) {
+        return 'android';
+    } else if (/Linux/.test(platform)) {
+        return 'linux';
+    } else {
+        return 'unknown';
+    }
+}
+
+export function formatKeySymbol(key: string): string {
+    switch (key.toLowerCase()) {
+        case 'option':
+            return '⌥';
+        case 'shift':
+            return '⇧';
+        case 'command':
+            return '⌘';
+        case 'macctrl':
+            return '⌃';
+        default:
+            return key.toUpperCase();
+    }
+}