fix: handles error when loading followers in profile

lib/app/features/ion_connect/providers/relays/relay_auth_provider.r.dart

@@ -59,6 +59,12 @@ class RelayAuth extends _$RelayAuth {
           ref.read(relaysReplicaDelayProvider.notifier).setDelay();
           return true;
         }
+        // If relay is already authenticated with a different public key (user switch/logout race condition),
+        // close the relay connection. RelayClosedMixin will automatically invalidate the relay provider,
+        // causing the next request to get a fresh connection with correct credentials.
+        if (RelayAuthService.isAlreadyAuthenticatedWithDifferentKeyError(error)) {
+          relay.close();
+        }
         return false;
       },
     );
@@ -188,4 +194,13 @@ class RelayAuthService {
   static bool isRelayAuthoritativeError(Object? error) {
     return error is SendEventException && error.code.startsWith('relay-is-authoritative');
   }
+
+  /// Detects if the error indicates the relay is already authenticated with a different public key.
+  /// This can happen during user switch/logout when a relay connection is reused before being invalidated.
+  static bool isAlreadyAuthenticatedWithDifferentKeyError(Object? error) {
+    if (error is! SendEventException) return false;
+    final errorMessage = error.code.toLowerCase();
+    return errorMessage.contains('already authenticated') &&
+        errorMessage.contains('different public key');
+  }
 }

lib/app/features/user/providers/count_provider.r.dart

@@ -110,11 +110,16 @@ class Count extends _$Count {
             },
           );
 
-      await ref.read(ionConnectNotifierProvider.notifier).sendEvent(
-            requestEvent,
-            actionSource: ActionSourceRelayUrl(relay.keys.first.url),
-            cache: false,
-          );
+      try {
+        await ref.read(ionConnectNotifierProvider.notifier).sendEvent(
+              requestEvent,
+              actionSource: ActionSourceRelayUrl(relay.keys.first.url),
+              cache: false,
+            );
+      } catch (sendError) {
+        relay.keys.first.unsubscribe(subscription.id);
+        rethrow;
+      }
 
       final responseEntity = await messagesFuture;
 

lib/app/features/user/providers/followers_count_provider.r.dart

@@ -28,16 +28,20 @@ class FollowersCount extends _$FollowersCount {
       ),
     ];
 
-    return await ref.watch(
-      countProvider(
-        actionSource: ActionSourceUser(pubkey),
-        requestData: EventCountRequestData(filters: filters),
-        key: pubkey,
-        type: EventCountResultType.followers,
-        cache: cache,
-        network: network,
-      ).future,
-    ) as FutureOr<int?>;
+    try {
+      return await ref.watch(
+        countProvider(
+          actionSource: ActionSourceUser(pubkey),
+          requestData: EventCountRequestData(filters: filters),
+          key: pubkey,
+          type: EventCountResultType.followers,
+          cache: cache,
+          network: network,
+        ).future,
+      ) as FutureOr<int?>;
+    } catch (error) {
+      return null;
+    }
   }
 
   void addOne() {