feat: add stats page for admin

frontend-admin/src/navigation/AdminNavigator.tsx

@@ -24,6 +24,7 @@ import { fontSize, spacing } from "../theme";
 import type { AdminTabParamList, AdminStackParamList } from "./types";
 
 import DashboardScreen from "../screens/admin/DashboardScreen";
+import StatsScreen from "../screens/admin/StatsScreen";
 import OrdersScreen from "../screens/admin/OrdersScreen";
 import OrderDetailScreen from "../screens/admin/OrderDetailScreen";
 import UsersScreen from "../screens/admin/UsersScreen";
@@ -175,6 +176,16 @@ function AdminTabs() {
                         ),
                     }}
                 />
+                <Tab.Screen
+                    name="Stats"
+                    component={StatsScreen}
+                    options={{
+                        title: "Stats",
+                        tabBarIcon: ({ color, size }) => (
+                            <Ionicons name="bar-chart-outline" size={size} color={color} />
+                        ),
+                    }}
+                />
                 <Tab.Screen
                     name="Orders"
                     component={OrdersScreen}

frontend-admin/src/navigation/types.ts

@@ -7,6 +7,7 @@ export type AuthStackParamList = {
 
 export type AdminTabParamList = {
     Dashboard: undefined;
+    Stats: undefined;
     Orders: undefined;
     Users: undefined;
     Products: undefined;