feat(mobile): gate publish behind subscription, surface free trial

Publishing (including re-publishing after a lapsed subscription —
PRD §15) now checks Pro entitlement first; if inactive, prompts the
owner to the paywall instead of calling the publish endpoint. The
paywall also flags packages with an active introductory offer as
"7 gün ücretsiz dene" (both plans now have a 7-day free trial
configured in App Store Connect, Turkey territory).

apps/mobile/src/app/account/subscription.tsx

@@ -144,6 +144,11 @@ export default function SubscriptionScreen() {
                 <Text style={{ fontSize: 13, color: "#78716C", marginTop: 2 }}>
                   {pkg.product.priceString} / {pkg.packageType === "ANNUAL" ? "yıl" : "ay"}
                 </Text>
+                {pkg.product.introPrice ? (
+                  <Text style={{ fontSize: 12, color: "#059669", fontWeight: "700", marginTop: 2 }}>
+                    7 gün ücretsiz dene
+                  </Text>
+                ) : null}
               </View>
               {purchasingPackageId === pkg.identifier ? (
                 <ActivityIndicator color="#C8A96B" />

apps/mobile/src/app/menu/index.tsx

@@ -16,6 +16,7 @@ import * as Haptics from "expo-haptics";
 import { api } from "@/lib/api";
 import { getActiveRestaurant, type ActiveRestaurant } from "@/lib/active-restaurant";
 import { getPublicMenuUrl, getPublicMenuDisplayUrl } from "@/lib/urls";
+import { getCustomerInfo, isProActive } from "@/lib/purchases";
 import { CategoryPillBar } from "@/components/menu/CategoryPillBar";
 import { MenuItemCard, type MenuItemData } from "@/components/menu/MenuItemCard";
 import { ItemDetailSheet } from "@/components/menu/ItemDetailSheet";
@@ -250,6 +251,28 @@ export default function MenuEditorScreen() {
   // Publish
   async function onPublish() {
     if (!active) return;
+
+    // Publishing (and re-publishing after a lapsed subscription — PRD §15)
+    // requires an active Pro entitlement or trial. RevenueCat's SDK starts
+    // the trial automatically on first purchase if the customer is eligible.
+    try {
+      const info = await getCustomerInfo();
+      if (!isProActive(info)) {
+        Alert.alert(
+          "Menünüzü yayınlamak için abone olun",
+          "7 gün ücretsiz deneyin, istediğiniz zaman iptal edin.",
+          [
+            { text: "Vazgeç", style: "cancel" },
+            { text: "Devam Et", onPress: () => router.push("/account/subscription") },
+          ],
+        );
+        return;
+      }
+    } catch (err) {
+      Alert.alert("Hata", err instanceof Error ? err.message : "Abonelik durumu kontrol edilemedi.");
+      return;
+    }
+
     setPublishing(true);
     try {
       await api.post(`/menus/${active.menuId}/publish`);