feat(sbp_payments): added banks deep link handling to chat screen

lib/core/app_router.dart

@@ -123,7 +123,22 @@ class AppRouter {
     return '${InfoByOrderScreen.path}?planId=$consultationId';
   }
 
-  static String? _resolveDeepLinkUri(Uri uri) {
+  /// Deep link после оплаты Alfa: `finance/alfa/return/{orderId}` → чат с query `orderId`.
+  static String? _resolveFinanceAlfaReturnDeepLink(List<String> effectiveSegments) {
+    if (effectiveSegments.length != 4 ||
+        effectiveSegments[1] != 'alfa' ||
+        effectiveSegments[2] != 'return') {
+      return null;
+    }
+    final orderId = effectiveSegments[3];
+    if (orderId.isEmpty) return null;
+    developer.log('Deep link: finance/alfa/return/$orderId', name: 'AppRouter');
+    print('Deep link: finance/alfa/return/$orderId');
+    return '${RouteConstants.chatScreen}?orderId=$orderId';
+  }
+
+  /// Разбирает deep link URI в внутренний route target (или null, если host не наш).
+  static String? resolveDeepLinkTarget(Uri uri) {
     final host = uri.host.toLowerCase();
     final segments = uri.pathSegments;
 
@@ -189,6 +204,10 @@ class AppRouter {
         final target = _resolveConsultationsDeepLink(effectiveSegments);
         if (target != null) return target;
         break;
+      case 'finance':
+        final target = _resolveFinanceAlfaReturnDeepLink(effectiveSegments);
+        if (target != null) return target;
+        break;
     }
 
     developer.log('Unknown deep link format: ${effectiveSegments.length} effective segments, type=$type, redirecting to feed', name: 'AppRouter');
@@ -196,7 +215,7 @@ class AppRouter {
   }
 
   static String? _handleRedirect(BuildContext context, GoRouterState state) {
-    return _resolveDeepLinkUri(state.uri);
+    return resolveDeepLinkTarget(state.uri);
   }
 
   static void navigateByDeepLinkUrl(String url) {
@@ -230,7 +249,7 @@ class AppRouter {
       );
     }
 
-    final target = _resolveDeepLinkUri(uri);
+    final target = resolveDeepLinkTarget(uri);
     FlutterNativeSplash.remove();
     if (target != null) {
       appRouter.go(target);

lib/core/routing/other_routes.dart

@@ -211,13 +211,23 @@ class OtherRoutes {
         name: 'chatScreen',
         builder: (context, state) {
           final uuidFromQuery = state.uri.queryParameters['uuid'];
-          if (uuidFromQuery != null) {
-            return ChatScreen(uuid: uuidFromQuery, sendInitialMessage: false);
+          final orderIdFromQuery = state.uri.queryParameters['orderId'];
+          if (uuidFromQuery != null || orderIdFromQuery != null) {
+            return ChatScreen(
+              uuid: uuidFromQuery,
+              orderId: orderIdFromQuery,
+              sendInitialMessage: false,
+            );
           }
           final data = state.extra as Map<String, dynamic>;
-          final uuid = data['uuid'] as String;
+          final uuid = data['uuid'] as String?;
+          final orderId = data['orderId'] as String?;
           final sendInitialMessage = data['sendInitialMessage'] as bool?;
-          return ChatScreen(uuid: uuid, sendInitialMessage: sendInitialMessage);
+          return ChatScreen(
+            uuid: uuid,
+            orderId: orderId,
+            sendInitialMessage: sendInitialMessage,
+          );
         },
       ),
       GoRoute(