feat(social): standard NIP-56 reporting — ReportTransport in commons_core, report sheet on offers and chats, local hide + optional block

apps/app_seeds/lib/ui/chat_screen.dart

@@ -24,6 +24,7 @@ import '../state/trust_cubit.dart';
 import 'market_gate.dart';
 import 'peer_avatar.dart';
 import 'rating_sheet.dart';
+import 'report_sheet.dart';
 import 'theme.dart';
 
 /// A 1:1 encrypted chat with one peer (redesign screen 10). Private and
@@ -202,6 +203,20 @@ class _ChatScreenState extends State<ChatScreen> {
       widget.settings ??
       (getIt.isRegistered<SocialSettings>() ? getIt<SocialSettings>() : null);
 
+  /// Reports this peer (a standard report event to the community servers);
+  /// when they were also blocked from the sheet, leaves the chat too.
+  Future<void> _reportPeer() async {
+    final outcome = await showReportSheet(
+      context,
+      connection: widget.connection,
+      subjectPubkey: widget.peerPubkey,
+      settings: _settings,
+    );
+    if (outcome != null && outcome.blocked && mounted) {
+      Navigator.of(context).pop();
+    }
+  }
+
   /// Blocks this peer after confirmation and leaves the chat; their offers,
   /// conversation and future messages disappear (all locally).
   Future<void> _blockPeer() async {
@@ -287,19 +302,24 @@ class _ChatScreenState extends State<ChatScreen> {
               tooltip: t.chat.payG1,
               onPressed: _payG1,
             ),
-          if (_settings != null)
-            PopupMenuButton<String>(
-              key: const Key('chat.menu'),
-              onSelected: (value) {
-                if (value == 'block') _blockPeer();
-              },
-              itemBuilder: (context) => [
+          PopupMenuButton<String>(
+            key: const Key('chat.menu'),
+            onSelected: (value) {
+              if (value == 'report') _reportPeer();
+              if (value == 'block') _blockPeer();
+            },
+            itemBuilder: (context) => [
+              PopupMenuItem(
+                value: 'report',
+                child: Text(t.report.person),
+              ),
+              if (_settings != null)
                 PopupMenuItem(
                   value: 'block',
                   child: Text(t.block.action),
                 ),
-              ],
-            ),
+            ],
+          ),
         ],
       ),
       body: _loading || messages == null || trust == null || rating == null