Buy on StoreKit and Play Billing, then confirm with the backend (#78).

Native purchases replace RevenueCat. The app sends the signed transaction or Play token to /monetization/store/confirm/ so access is granted only after the store check.

llm-fe/ios/App/App.xcodeproj/project.pbxproj

@@ -283,7 +283,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
@@ -334,7 +334,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
@@ -350,7 +350,7 @@
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
 				INFOPLIST_FILE = App/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				MARKETING_VERSION = 0.1.0;
 				OTHER_SWIFT_FLAGS = "$(inherited) \"-D\" \"COCOAPODS\" \"-DDEBUG\"";
@@ -370,7 +370,7 @@
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
 				INFOPLIST_FILE = App/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				MARKETING_VERSION = 0.1.0;
 				PRODUCT_BUNDLE_IDENTIFIER = ai.hesychia.chat;

llm-fe/ios/App/Podfile

@@ -1,6 +1,6 @@
 require_relative '../../node_modules/@capacitor/ios/scripts/pods_helpers'
 
-platform :ios, '14.0'
+platform :ios, '15.0'
 use_frameworks!
 
 # workaround to avoid Xcode caching of Pods that requires
@@ -15,6 +15,7 @@ def capacitor_pods
   pod 'CapacitorKeyboard', :path => '../../node_modules/@capacitor/keyboard'
   pod 'CapacitorPreferences', :path => '../../node_modules/@capacitor/preferences'
   pod 'CapacitorStatusBar', :path => '../../node_modules/@capacitor/status-bar'
+  pod 'NativeStoreBilling', :path => '../../plugins/native-store-billing'
 end
 
 target 'App' do