feat(pwa): add mobile optimizations (safe areas, touch targets, standalone mode)

frontend/src/app/globals.css

@@ -145,4 +145,30 @@
 ::-webkit-scrollbar-thumb:hover {
     background: oklch(0.5 0 0 / 35%);
 }
-}
+}
+/* Mobile/PWA Optimizations */
+html { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
+
+/* iOS Safe Areas */
+body { padding-top: env(safe-area-inset-top); padding-bottom: env(safe-area-inset-bottom); padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right); }
+
+/* Prevent zoom on input focus */
+input, select, textarea { font-size: 16px; }
+
+/* Hide scrollbar on mobile */
+@media (max-width: 768px) {
+  ::-webkit-scrollbar { display: none; }
+  body { scrollbar-width: none; }
+}
+
+/* Minimum touch target 44x44px */
+button, a, input, select, textarea, [role="button"] { min-height: 44px; min-width: 44px; }
+
+/* Disable hover effects on touch devices */
+@media (hover: none) { *:hover { transform: none !important; } }
+
+/* PWA standalone mode styles */
+@media (display-mode: standalone) {
+  html { height: 100vh; height: 100dvh; }
+  body { overflow: hidden; position: fixed; width: 100%; height: 100%; }
+}

frontend/src/app/layout.tsx

@@ -1,4 +1,4 @@
-import type { Metadata } from "next"
+import type { Metadata, Viewport } from "next"
 import { Syne, DM_Sans } from "next/font/google"
 import "./globals.css"
 import { Providers } from "./providers"
@@ -15,9 +15,33 @@ const dmSans = DM_Sans({
   weight: ["400", "500", "600", "700"],
 })
 
+export const viewport: Viewport = {
+  width: "device-width",
+  initialScale: 1,
+  maximumScale: 1,
+  userScalable: false,
+  themeColor: "#1B1A55",
+  viewportFit: "cover",
+}
+
 export const metadata: Metadata = {
   title: "WrestleDesk",
   description: "Wrestling Club Management System",
+  manifest: "/manifest.json",
+  appleWebApp: {
+    capable: true,
+    statusBarStyle: "black-translucent",
+    title: "WrestleDesk",
+  },
+  icons: {
+    icon: [
+      { url: "/icon-192.png", sizes: "192x192", type: "image/png" },
+      { url: "/icon-512.png", sizes: "512x512", type: "image/png" },
+    ],
+    apple: [
+      { url: "/icon-192.png", sizes: "192x192", type: "image/png" },
+    ],
+  },
 }
 
 export default function RootLayout({