fix(ios): pass source app options and handle cold-start Universal Links

Two fixes based on review feedback:

1. openURLContexts / willConnectToSession: pass sourceApplication from
   UIOpenURLContext.options instead of empty @{}, so AppsFlyer SDK receives
   correct attribution metadata on URI-scheme deep links.

2. willConnectToSession: also iterate connectionOptions.userActivities and
   forward NSUserActivityTypeBrowsingWeb entries to continueUserActivity:,
   fixing cold-start Universal Links under UIScene (the core reported issue).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Kobikg78

ios/Classes/AppsflyerSdkPlugin.m

@@ -973,17 +973,31 @@ - (BOOL)application:(UIApplication *)application continueUserActivity:(NSUserAct
 // UIScene-based URI-scheme deep links (iOS 13+, Flutter 3.41+ UIScene migration)
 - (BOOL)scene:(UIScene*)scene openURLContexts:(NSSet<UIOpenURLContext*>*)URLContexts API_AVAILABLE(ios(13.0)) {
     for (UIOpenURLContext *context in URLContexts) {
-        [[AppsFlyerAttribution shared] handleOpenUrl:context.URL options:@{}];
+        NSDictionary *opts = @{};
+        if (context.options.sourceApplication) {
+            opts = @{UIApplicationOpenURLOptionsSourceApplicationKey: context.options.sourceApplication};
+        }
+        [[AppsFlyerAttribution shared] handleOpenUrl:context.URL options:opts];
     }
     return NO;
 }
 
-// Cold-start URI-scheme deep links delivered via UISceneConnectionOptions (iOS 13+)
+// Cold-start deep links delivered via UISceneConnectionOptions (iOS 13+)
+// Handles both URI-scheme links (URLContexts) and Universal Links (userActivities)
 - (BOOL)scene:(UIScene*)scene
     willConnectToSession:(UISceneSession*)session
                  options:(UISceneConnectionOptions*)connectionOptions API_AVAILABLE(ios(13.0)) {
     for (UIOpenURLContext *context in connectionOptions.URLContexts) {
-        [[AppsFlyerAttribution shared] handleOpenUrl:context.URL options:@{}];
+        NSDictionary *opts = @{};
+        if (context.options.sourceApplication) {
+            opts = @{UIApplicationOpenURLOptionsSourceApplicationKey: context.options.sourceApplication};
+        }
+        [[AppsFlyerAttribution shared] handleOpenUrl:context.URL options:opts];
+    }
+    for (NSUserActivity *activity in connectionOptions.userActivities) {
+        if ([activity.activityType isEqualToString:NSUserActivityTypeBrowsingWeb]) {
+            [[AppsFlyerAttribution shared] continueUserActivity:activity restorationHandler:nil];
+        }
     }
     return NO;
 }