fix(test): fix lifecycle tests timing out on web/JS platform

The completeReadyCompleters() helper was async void, so its body ran as
a deferred microtask and cleared the list. When lifecycle processing
later called connect() (creating a new readyCompleter), that completer
was never completed, causing tests to hang on web/JS where microtask
scheduling differs from native Dart.

Replace with settleLifecycle() that loops: complete all pending
completers → pump event queue → repeat until no new completers appear.

Author: brunovsiqueira

packages/supabase_flutter/test/lifecycle_test.dart

@@ -112,12 +112,18 @@ void main() {
       await future;
     }
 
-    // Helper: complete all pending ready futures to unblock connect()
-    void completeReadyCompleters() async {
-      for (final completer in readyCompleters) {
-        if (!completer.isCompleted) completer.complete();
+    /// Repeatedly complete pending ready futures and pump the event queue
+    /// until no new completers appear. This handles the case where lifecycle
+    /// processing triggers a connect() that creates a new completer.
+    Future<void> settleLifecycle() async {
+      var previousCount = -1;
+      while (readyCompleters.length != previousCount) {
+        previousCount = readyCompleters.length;
+        for (final c in readyCompleters) {
+          if (!c.isCompleted) c.complete();
+        }
+        await pumpEventQueue();
       }
-      readyCompleters.clear();
     }
 
     test(
@@ -143,8 +149,7 @@ void main() {
       binding.handleAppLifecycleStateChanged(AppLifecycleState.resumed);
 
       // Complete any pending ready futures (reconnect)
-      completeReadyCompleters();
-      await pumpEventQueue();
+      await settleLifecycle();
 
       expect(realtime.connState, SocketStates.open);
       expect(realtime.conn, isNotNull);
@@ -177,8 +182,7 @@ void main() {
       binding.handleAppLifecycleStateChanged(AppLifecycleState.resumed);
 
       // Complete all pending ready futures
-      completeReadyCompleters();
-      await pumpEventQueue();
+      await settleLifecycle();
 
       // Should have reconnected, not stuck disconnecting
       expect(realtime.connState, SocketStates.open);
@@ -212,8 +216,7 @@ void main() {
       binding.handleAppLifecycleStateChanged(AppLifecycleState.resumed);
 
       // Complete all pending ready futures as they appear
-      completeReadyCompleters();
-      await pumpEventQueue();
+      await settleLifecycle();
 
       expect(realtime.connState, SocketStates.open);
       expect(realtime.conn, isNotNull);
@@ -246,8 +249,7 @@ void main() {
       binding.handleAppLifecycleStateChanged(AppLifecycleState.paused);
 
       // Complete all pending ready futures
-      completeReadyCompleters();
-      await pumpEventQueue();
+      await settleLifecycle();
 
       // Should be disconnected since the last event was paused
       expect(realtime.connState, SocketStates.disconnected);