fix(tc): external address type resolution in trade dialog (#3118)

## Description
Fixes incorrect token type detection in `TradeCommunityTokenDialog` when
navigation always passes `externalAddress`. The dialog now derives
`ExternalAddressType` from Ion entity or token definition, and the token
page passes the correct origin `eventReference` for Ion tokens to keep
trade behavior consistent.

## Task ID
ION-4998

## Type of Change
- [x] Bug fix

## Screenshots
<img width="350" alt="image"
src="https://github.com/user-attachments/assets/d11f312c-0895-464e-ab7f-093ebc450687"
/>

Author: ice-tychon

lib/app/features/tokenized_communities/views/pages/tokenized_community_page.dart

@@ -15,6 +15,7 @@ import 'package:ion/app/features/components/bookmarks/bookmark_button.dart';
 import 'package:ion/app/features/feed/views/components/community_token_live/components/feed_content_token.dart';
 import 'package:ion/app/features/feed/views/components/community_token_live/components/feed_profile_token.dart';
 import 'package:ion/app/features/feed/views/components/community_token_live/components/feed_twitter_token.dart';
+import 'package:ion/app/features/tokenized_communities/models/entities/community_token_definition.f.dart';
 import 'package:ion/app/features/tokenized_communities/models/trading_stats_formatted.dart';
 import 'package:ion/app/features/tokenized_communities/providers/community_token_definition_provider.r.dart';
 import 'package:ion/app/features/tokenized_communities/providers/token_latest_trades_provider.r.dart';
@@ -83,6 +84,10 @@ class TokenizedCommunityPage extends HookConsumerWidget {
     final tokenDefinition = ref
         .watch(tokenDefinitionForExternalAddressProvider(externalAddress: externalAddress))
         .valueOrNull;
+    final tradeEventReference = switch (tokenDefinition?.data) {
+      CommunityTokenDefinitionIon(:final eventReference) => eventReference,
+      _ => null,
+    };
     final tokenType = ref.watch(tokenTypeForExternalAddressProvider(externalAddress)).valueOrNull;
     final activeTab = useState(TokenizedCommunityTabType.chart);
     final isCommentInputFocused = useMemoized(() => ValueNotifier<bool>(false), []);
@@ -200,9 +205,9 @@ class TokenizedCommunityPage extends HookConsumerWidget {
         builder: (context, isFocused, _) {
           return isFocused
               ? const SizedBox.shrink()
-              : FloatingTradeIsland(
-                  externalAddress: externalAddress,
-                );
+              : tradeEventReference != null
+                  ? FloatingTradeIsland(eventReference: tradeEventReference)
+                  : FloatingTradeIsland(externalAddress: externalAddress);
         },
       ),
       headerActionsBuilder: (OverlayMenuCloseSignal menuCloseSignal) => [

lib/app/features/tokenized_communities/views/trade_community_token_dialog.dart

@@ -18,6 +18,7 @@ import 'package:ion/app/features/ion_connect/model/event_reference.f.dart';
 import 'package:ion/app/features/ion_connect/providers/ion_connect_entity_provider.r.dart';
 import 'package:ion/app/features/tokenized_communities/enums/community_token_trade_mode.dart';
 import 'package:ion/app/features/tokenized_communities/providers/community_token_trade_notifier_provider.r.dart';
+import 'package:ion/app/features/tokenized_communities/providers/external_address_type_provider.r.dart';
 import 'package:ion/app/features/tokenized_communities/providers/trade_community_token_controller_provider.r.dart';
 import 'package:ion/app/features/tokenized_communities/providers/trade_infrastructure_providers.r.dart';
 import 'package:ion/app/features/tokenized_communities/utils/constants.dart';
@@ -60,12 +61,12 @@ class TradeCommunityTokenDialog extends HookConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final resolvedExternalAddress = externalAddress ?? eventReference!.toString();
-    final resolvedExternalAddressType = externalAddress != null
-        ? const ExternalAddressType.x()
-        : ref
+    final resolvedExternalAddressType = eventReference != null
+        ? ref
             .watch(ionConnectEntityProvider(eventReference: eventReference!))
             .valueOrNull
-            ?.externalAddressType;
+            ?.externalAddressType
+        : ref.watch(externalAddressTypeProvider(externalAddress: externalAddress!)).valueOrNull;
     if (resolvedExternalAddressType == null) {
       return const SheetContent(body: SizedBox.shrink());
     }