feat(block2): messages inbox + drawer 'Chat' link (was unreachable)

Chat was only reachable via an offer's 'Message' button, and the drawer 'Chat'
sat on 'coming soon' — so messaging/trust were effectively hidden.
- MessageStore keeps a conversation index (the keystore has no key enumeration)
  and exposes conversations() — peers newest-active-first with their last line.
- ChatListScreen: the messages inbox (tap a conversation → /chat/:pubkey).
- Drawer 'Chat' is now a live destination -> /messages (gated like Market).
- i18n en/es/pt. conversations() covered by a plain test (no widget hang).

Analyzer clean.

apps/app_seeds/lib/app.dart

@@ -18,6 +18,7 @@ import 'state/inventory_cubit.dart';
 import 'state/variety_detail_cubit.dart';
 import 'ui/about_screen.dart';
 import 'ui/auto_backup_gate.dart';
+import 'ui/chat_list_screen.dart';
 import 'ui/chat_screen.dart';
 import 'ui/home_screen.dart';
 import 'ui/intro_screen.dart';
@@ -106,6 +107,11 @@ class TaneApp extends StatelessWidget {
               outbox: outbox,
             ),
           ),
+        if (social != null && socialSettings != null && messageStore != null)
+          GoRoute(
+            path: '/messages',
+            builder: (context, state) => ChatListScreen(store: messageStore),
+          ),
         if (social != null && socialSettings != null)
           GoRoute(
             path: '/chat/:pubkey',

apps/app_seeds/lib/i18n/en.i18n.json

@@ -361,6 +361,10 @@
     "locationFailed": "Couldn't get your location — check that location is on and the permission is granted",
     "queued": "Saved — we'll share these when you're connected"
   },
+  "chatList": {
+    "title": "Messages",
+    "empty": "No conversations yet. Message someone from the market."
+  },
   "chat": {
     "title": "Chat",
     "hint": "Write a message…",

apps/app_seeds/lib/i18n/es.i18n.json

@@ -361,6 +361,10 @@
     "locationFailed": "No se pudo obtener tu ubicación — comprueba que la ubicación está activada y el permiso concedido",
     "queued": "Guardado — las compartiremos cuando tengas conexión"
   },
+  "chatList": {
+    "title": "Mensajes",
+    "empty": "Aún no hay conversaciones. Escribe a alguien desde el mercado."
+  },
   "chat": {
     "title": "Chat",
     "hint": "Escribe un mensaje…",

apps/app_seeds/lib/i18n/pt.i18n.json

@@ -357,6 +357,10 @@
     "locationFailed": "Não foi possível obter a tua localização — verifica se a localização está ativa e a permissão concedida",
     "queued": "Guardado — vamos partilhá-las quando tiveres ligação"
   },
+  "chatList": {
+    "title": "Mensagens",
+    "empty": "Ainda não há conversas. Escreve a alguém a partir do mercado."
+  },
   "chat": {
     "title": "Conversa",
     "hint": "Escreve uma mensagem…",

apps/app_seeds/lib/i18n/strings.g.dart

@@ -4,9 +4,9 @@
 /// To regenerate, run: `dart run slang`
 ///
 /// Locales: 3
-/// Strings: 992 (330 per locale)
+/// Strings: 998 (332 per locale)
 ///
-/// Built on 2026-07-10 at 10:09 UTC
+/// Built on 2026-07-10 at 10:26 UTC
 
 // coverage:ignore-file
 // ignore_for_file: type=lint, unused_import

apps/app_seeds/lib/i18n/strings_en.g.dart

@@ -70,6 +70,7 @@ class Translations with BaseTranslations<AppLocale, Translations> {
 	late final Translations$desiccant$en desiccant = Translations$desiccant$en.internal(_root);
 	late final Translations$unit$en unit = Translations$unit$en.internal(_root);
 	late final Translations$market$en market = Translations$market$en.internal(_root);
+	late final Translations$chatList$en chatList = Translations$chatList$en.internal(_root);
 	late final Translations$chat$en chat = Translations$chat$en.internal(_root);
 	late final Translations$trust$en trust = Translations$trust$en.internal(_root);
 }
@@ -1142,6 +1143,21 @@ class Translations$market$en {
 	String get queued => 'Saved — we\'ll share these when you\'re connected';
 }
 
+// Path: chatList
+class Translations$chatList$en {
+	Translations$chatList$en.internal(this._root);
+
+	final Translations _root; // ignore: unused_field
+
+	// Translations
+
+	/// en: 'Messages'
+	String get title => 'Messages';
+
+	/// en: 'No conversations yet. Message someone from the market.'
+	String get empty => 'No conversations yet. Message someone from the market.';
+}
+
 // Path: chat
 class Translations$chat$en {
 	Translations$chat$en.internal(this._root);
@@ -1969,6 +1985,8 @@ extension on Translations {
 			'market.useLocation' => 'Use my approximate location',
 			'market.locationFailed' => 'Couldn\'t get your location — check that location is on and the permission is granted',
 			'market.queued' => 'Saved — we\'ll share these when you\'re connected',
+			'chatList.title' => 'Messages',
+			'chatList.empty' => 'No conversations yet. Message someone from the market.',
 			'chat.title' => 'Chat',
 			'chat.hint' => 'Write a message…',
 			'chat.send' => 'Send',

apps/app_seeds/lib/i18n/strings_es.g.dart

@@ -69,6 +69,7 @@ class TranslationsEs extends Translations with BaseTranslations<AppLocale, Trans
 	@override late final _Translations$desiccant$es desiccant = _Translations$desiccant$es._(_root);
 	@override late final _Translations$unit$es unit = _Translations$unit$es._(_root);
 	@override late final _Translations$market$es market = _Translations$market$es._(_root);
+	@override late final _Translations$chatList$es chatList = _Translations$chatList$es._(_root);
 	@override late final _Translations$chat$es chat = _Translations$chat$es._(_root);
 	@override late final _Translations$trust$es trust = _Translations$trust$es._(_root);
 }
@@ -634,6 +635,17 @@ class _Translations$market$es extends Translations$market$en {
 	@override String get queued => 'Guardado — las compartiremos cuando tengas conexión';
 }
 
+// Path: chatList
+class _Translations$chatList$es extends Translations$chatList$en {
+	_Translations$chatList$es._(TranslationsEs root) : this._root = root, super.internal(root);
+
+	final TranslationsEs _root; // ignore: unused_field
+
+	// Translations
+	@override String get title => 'Mensajes';
+	@override String get empty => 'Aún no hay conversaciones. Escribe a alguien desde el mercado.';
+}
+
 // Path: chat
 class _Translations$chat$es extends Translations$chat$en {
 	_Translations$chat$es._(TranslationsEs root) : this._root = root, super.internal(root);
@@ -1325,6 +1337,8 @@ extension on TranslationsEs {
 			'market.useLocation' => 'Usar mi ubicación aproximada',
 			'market.locationFailed' => 'No se pudo obtener tu ubicación — comprueba que la ubicación está activada y el permiso concedido',
 			'market.queued' => 'Guardado — las compartiremos cuando tengas conexión',
+			'chatList.title' => 'Mensajes',
+			'chatList.empty' => 'Aún no hay conversaciones. Escribe a alguien desde el mercado.',
 			'chat.title' => 'Chat',
 			'chat.hint' => 'Escribe un mensaje…',
 			'chat.send' => 'Enviar',

apps/app_seeds/lib/i18n/strings_pt.g.dart

@@ -69,6 +69,7 @@ class TranslationsPt extends Translations with BaseTranslations<AppLocale, Trans
 	@override late final _Translations$desiccant$pt desiccant = _Translations$desiccant$pt._(_root);
 	@override late final _Translations$unit$pt unit = _Translations$unit$pt._(_root);
 	@override late final _Translations$market$pt market = _Translations$market$pt._(_root);
+	@override late final _Translations$chatList$pt chatList = _Translations$chatList$pt._(_root);
 	@override late final _Translations$chat$pt chat = _Translations$chat$pt._(_root);
 	@override late final _Translations$trust$pt trust = _Translations$trust$pt._(_root);
 }
@@ -630,6 +631,17 @@ class _Translations$market$pt extends Translations$market$en {
 	@override String get queued => 'Guardado — vamos partilhá-las quando tiveres ligação';
 }
 
+// Path: chatList
+class _Translations$chatList$pt extends Translations$chatList$en {
+	_Translations$chatList$pt._(TranslationsPt root) : this._root = root, super.internal(root);
+
+	final TranslationsPt _root; // ignore: unused_field
+
+	// Translations
+	@override String get title => 'Mensagens';
+	@override String get empty => 'Ainda não há conversas. Escreve a alguém a partir do mercado.';
+}
+
 // Path: chat
 class _Translations$chat$pt extends Translations$chat$en {
 	_Translations$chat$pt._(TranslationsPt root) : this._root = root, super.internal(root);
@@ -1317,6 +1329,8 @@ extension on TranslationsPt {
 			'market.useLocation' => 'Usar a minha localização aproximada',
 			'market.locationFailed' => 'Não foi possível obter a tua localização — verifica se a localização está ativa e a permissão concedida',
 			'market.queued' => 'Guardado — vamos partilhá-las quando tiveres ligação',
+			'chatList.title' => 'Mensagens',
+			'chatList.empty' => 'Ainda não há conversas. Escreve a alguém a partir do mercado.',
 			'chat.title' => 'Conversa',
 			'chat.hint' => 'Escreve uma mensagem…',
 			'chat.send' => 'Enviar',

apps/app_seeds/lib/services/message_store.dart

@@ -8,12 +8,29 @@ import '../security/secret_store.dart';
 /// capped, per-peer JSON list — recent history survives leaving the chat. Small
 /// and simple on purpose; the encrypted Drift DB is the eventual home if chats
 /// grow large.
+/// A conversation preview for the messages inbox.
+class ChatSummary {
+  const ChatSummary({
+    required this.peerPubkey,
+    required this.lastText,
+    required this.lastAt,
+  });
+
+  final String peerPubkey;
+  final String lastText;
+  final DateTime lastAt;
+}
+
 class MessageStore {
   MessageStore(this._store);
 
   final SecretStore _store;
   static const _prefix = 'tane.social.chat.';
 
+  /// Index of peers we have a conversation with (the keystore is key/value with
+  /// no key enumeration, so we track the list ourselves).
+  static const _indexKey = 'tane.social.chats';
+
   /// Keep only the most recent [_cap] messages per conversation, to bound the
   /// keystore entry size.
   static const _cap = 200;
@@ -36,7 +53,7 @@ class MessageStore {
   }
 
   /// Appends [message] to the conversation with [peerPubkey] (trimming to the
-  /// cap).
+  /// cap) and records the peer in the conversation index.
   Future<void> append(String peerPubkey, PrivateMessage message) async {
     final next = [...await history(peerPubkey), message];
     final capped =
@@ -52,5 +69,35 @@ class MessageStore {
           },
       ]),
     );
+    await _rememberPeer(peerPubkey);
+  }
+
+  /// Conversations, most-recently-active first (for the messages inbox).
+  Future<List<ChatSummary>> conversations() async {
+    final summaries = <ChatSummary>[];
+    for (final peer in await _peers()) {
+      final history = await this.history(peer);
+      if (history.isEmpty) continue;
+      final last = history.last;
+      summaries.add(ChatSummary(
+        peerPubkey: peer,
+        lastText: last.text,
+        lastAt: last.at,
+      ));
+    }
+    summaries.sort((a, b) => b.lastAt.compareTo(a.lastAt));
+    return summaries;
+  }
+
+  Future<List<String>> _peers() async {
+    final raw = await _store.read(_indexKey);
+    if (raw == null || raw.isEmpty) return const [];
+    return raw.split('\n').where((s) => s.isNotEmpty).toList();
+  }
+
+  Future<void> _rememberPeer(String peer) async {
+    final peers = await _peers();
+    if (peers.contains(peer)) return;
+    await _store.write(_indexKey, [...peers, peer].join('\n'));
   }
 }

apps/app_seeds/lib/ui/app_drawer.dart

@@ -49,6 +49,12 @@ class AppDrawer extends StatelessWidget {
             _DrawerItem(
               icon: const Icon(Icons.chat_bubble),
               label: t.menu.chat,
+              onTap: marketEnabled
+                  ? () {
+                      Navigator.of(context).pop();
+                      context.go('/messages');
+                    }
+                  : null,
             ),
             _DrawerItem(
               icon: const Icon(Icons.favorite),

apps/app_seeds/lib/ui/chat_list_screen.dart

@@ -0,0 +1,79 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+import '../i18n/strings.g.dart';
+import '../services/message_store.dart';
+import 'theme.dart';
+
+/// The messages inbox: past conversations, newest first. Tapping one opens the
+/// chat. Reached from the drawer's "Chat" entry.
+class ChatListScreen extends StatefulWidget {
+  const ChatListScreen({required this.store, super.key});
+
+  final MessageStore store;
+
+  @override
+  State<ChatListScreen> createState() => _ChatListScreenState();
+}
+
+class _ChatListScreenState extends State<ChatListScreen> {
+  List<ChatSummary>? _items;
+
+  @override
+  void initState() {
+    super.initState();
+    _load();
+  }
+
+  Future<void> _load() async {
+    final items = await widget.store.conversations();
+    if (mounted) setState(() => _items = items);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final t = context.t;
+    final items = _items;
+    return Scaffold(
+      appBar: AppBar(title: Text(t.chatList.title)),
+      body: items == null
+          ? const Center(child: CircularProgressIndicator())
+          : items.isEmpty
+              ? Center(
+                  child: Padding(
+                    padding: const EdgeInsets.all(32),
+                    child: Text(
+                      t.chatList.empty,
+                      textAlign: TextAlign.center,
+                      style: const TextStyle(color: seedMuted, fontSize: 15),
+                    ),
+                  ),
+                )
+              : ListView.separated(
+                  itemCount: items.length,
+                  separatorBuilder: (_, _) => const Divider(height: 1),
+                  itemBuilder: (context, i) {
+                    final c = items[i];
+                    return ListTile(
+                      leading: const CircleAvatar(
+                        backgroundColor: seedAvatar,
+                        child: Icon(Icons.person, color: seedOnAvatar),
+                      ),
+                      title: Text(_shortId(c.peerPubkey)),
+                      subtitle: Text(
+                        c.lastText,
+                        maxLines: 1,
+                        overflow: TextOverflow.ellipsis,
+                      ),
+                      onTap: () => context.go('/chat/${c.peerPubkey}'),
+                    );
+                  },
+                ),
+    );
+  }
+}
+
+/// A compact, human-ish rendering of a public key until we resolve names.
+String _shortId(String pubkey) => pubkey.length <= 12
+    ? pubkey
+    : '${pubkey.substring(0, 6)}…${pubkey.substring(pubkey.length - 4)}';

apps/app_seeds/test/services/message_store_test.dart

@@ -34,6 +34,18 @@ void main() {
     expect((await store.history('b')).single.text, 'toB');
   });
 
+  test('conversations lists peers newest-first with their last message',
+      () async {
+    await store.append('peerA', msg('me', 'hi A', 1000));
+    await store.append('peerB', msg('peerB', 'yo B', 3000));
+    await store.append('peerA', msg('peerA', 'back A', 2000));
+
+    final convos = await store.conversations();
+    expect(convos.map((c) => c.peerPubkey), ['peerB', 'peerA']); // 3000 > 2000
+    expect(convos.first.lastText, 'yo B');
+    expect(convos.last.lastText, 'back A');
+  });
+
   test('history is capped to the most recent 200', () async {
     for (var i = 0; i < 210; i++) {
       await store.append('peer', msg('me', 'm$i', i));