Dev discovery (#291)

* Refactor contact handling: replace DiscoveryContact with Contact, update related methods and settings

* Enhance contact handling: include latitude, longitude, and last modified timestamp in contact updates; refactor path handling to accommodate discovered contacts across multiple screens

* Enhance SNRIndicator: include discovered contacts in name resolution for repeaters

* Refactor path handling: replace addReturnPath with buildPath to improve path construction logic and handle target contact types

* Update lib/screens/map_screen.dart

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Add localization for "Show Discovery Contacts" in multiple languages and refactor location plausibility check in map screen

* Enhance contact management: update discovered contacts' active status and improve contact handling with flags and raw packet data

* Refactor ChannelsScreen: pass ChannelMessageStore to buildExpandedContent and ensure messages are cleared after channel creation

* Update MapScreen: adjust label zoom threshold and refactor guessed marker building to include labels

* Refactor ChannelsScreen: change channelMessageStore to a private getter and update its usage in buildExpandedContent calls

* Enhance location plausibility check: add latitude and longitude bounds to ensure valid coordinates

* Update lib/connector/meshcore_connector.dart

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Refactor MeshCoreConnector and related stores: update discovered contacts handling, migrate legacy keys, and set public key in community store

* Refactor MeshCoreConnector and ChannelsScreen: update discovered contacts handling and set public key in community store; enhance location plausibility check in MapScreen

* Update CMD_ADD_UPDATE_CONTACT frame format to include optional latitude and longitude fields

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

lib/storage/channel_message_store.dart

@@ -48,7 +48,7 @@ class ChannelMessageStore {
     final key = '$keyFor$channelIndex';
     final oldKey = '$_keyPrefix$channelIndex';
 
-    String? jsonString = prefs.getString(oldKey);
+    String? jsonString = prefs.getString(key);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(oldKey);

lib/storage/channel_order_store.dart

@@ -26,7 +26,7 @@ class ChannelOrderStore {
       return [];
     }
     final prefs = PrefsManager.instance;
-    String? jsonString = prefs.getString(_keyPrefix);
+    String? jsonString = prefs.getString(keyFor);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(_keyPrefix);

lib/storage/channel_settings_store.dart

@@ -32,7 +32,7 @@ class ChannelSettingsStore {
         await prefs.setBool(key, enabled);
       }
     }
-    return prefs.getBool(key) ?? false;
+    return enabled ?? false;
   }
 
   Future<void> saveSmazEnabled(int channelIndex, bool enabled) async {

lib/storage/channel_store.dart

@@ -19,7 +19,7 @@ class ChannelStore {
       return [];
     }
     final prefs = PrefsManager.instance;
-    String? jsonString = prefs.getString(_keyPrefix);
+    String? jsonString = prefs.getString(keyFor);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(_keyPrefix);

lib/storage/community_store.dart

@@ -25,7 +25,7 @@ class CommunityStore {
       return [];
     }
     final prefs = PrefsManager.instance;
-    String? jsonString = prefs.getString(_keyPrefix);
+    String? jsonString = prefs.getString(keyFor);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(_keyPrefix);

lib/storage/contact_discovery_store.dart

@@ -1,13 +1,13 @@
 import 'dart:convert';
 import 'dart:typed_data';
 
-import '../models/discovery_contact.dart';
+import '../models/contact.dart';
 import 'prefs_manager.dart';
 
 class ContactDiscoveryStore {
   static const String _keyPrefix = 'discovered_contacts';
 
-  Future<List<DiscoveryContact>> loadContacts() async {
+  Future<List<Contact>> loadContacts() async {
     final prefs = PrefsManager.instance;
     final jsonStr = prefs.getString(_keyPrefix);
     if (jsonStr == null) return [];
@@ -22,40 +22,62 @@ class ContactDiscoveryStore {
     }
   }
 
-  Future<void> saveContacts(List<DiscoveryContact> contacts) async {
+  Future<void> saveContacts(List<Contact> contacts) async {
     final prefs = PrefsManager.instance;
     final jsonList = contacts.map(_toJson).toList();
     await prefs.setString(_keyPrefix, jsonEncode(jsonList));
   }
 
-  Map<String, dynamic> _toJson(DiscoveryContact contact) {
+  Map<String, dynamic> _toJson(Contact contact) {
     return {
-      'rawPacket': base64Encode(contact.rawPacket),
       'publicKey': base64Encode(contact.publicKey),
       'name': contact.name,
       'type': contact.type,
+      'flags': contact.flags,
       'pathLength': contact.pathLength,
       'path': base64Encode(contact.path),
+      'pathOverride': contact.pathOverride,
+      'pathOverrideBytes': contact.pathOverrideBytes != null
+          ? base64Encode(contact.pathOverrideBytes!)
+          : null,
       'latitude': contact.latitude,
       'longitude': contact.longitude,
       'lastSeen': contact.lastSeen.millisecondsSinceEpoch,
+      'lastMessageAt': contact.lastMessageAt.millisecondsSinceEpoch,
+      'rawPacket': contact.rawPacket != null
+          ? base64Encode(contact.rawPacket!)
+          : null,
     };
   }
 
-  DiscoveryContact _fromJson(Map<String, dynamic> json) {
+  Contact _fromJson(Map<String, dynamic> json) {
     final lastSeenMs = json['lastSeen'] as int? ?? 0;
-    return DiscoveryContact(
-      rawPacket: Uint8List.fromList(base64Decode(json['rawPacket'] as String)),
+    final lastMessageMs = json['lastMessageAt'] as int?;
+    return Contact(
       publicKey: Uint8List.fromList(base64Decode(json['publicKey'] as String)),
       name: json['name'] as String? ?? 'Unknown',
       type: json['type'] as int? ?? 0,
+      flags: json['flags'] as int? ?? 0,
       pathLength: json['pathLength'] as int? ?? -1,
       path: json['path'] != null
           ? Uint8List.fromList(base64Decode(json['path'] as String))
           : Uint8List(0),
+      pathOverride: json['pathOverride'] as int?,
+      pathOverrideBytes: json['pathOverrideBytes'] != null
+          ? Uint8List.fromList(
+              base64Decode(json['pathOverrideBytes'] as String),
+            )
+          : null,
       latitude: (json['latitude'] as num?)?.toDouble(),
       longitude: (json['longitude'] as num?)?.toDouble(),
       lastSeen: DateTime.fromMillisecondsSinceEpoch(lastSeenMs),
+      lastMessageAt: DateTime.fromMillisecondsSinceEpoch(
+        lastMessageMs ?? lastSeenMs,
+      ),
+      isActive: false,
+      rawPacket: json['rawPacket'] != null
+          ? Uint8List.fromList(base64Decode(json['rawPacket'] as String))
+          : null,
     );
   }
 }

lib/storage/contact_group_store.dart

@@ -18,7 +18,7 @@ class ContactGroupStore {
       return [];
     }
     final prefs = PrefsManager.instance;
-    String? jsonString = prefs.getString(_keyPrefix);
+    String? jsonString = prefs.getString(keyFor);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(_keyPrefix);

lib/storage/contact_store.dart

@@ -76,6 +76,10 @@ class ContactStore {
       'longitude': contact.longitude,
       'lastSeen': contact.lastSeen.millisecondsSinceEpoch,
       'lastMessageAt': contact.lastMessageAt.millisecondsSinceEpoch,
+      'isActive': contact.isActive,
+      'rawPacket': contact.rawPacket != null
+          ? base64Encode(contact.rawPacket!)
+          : null,
     };
   }
 
@@ -103,6 +107,10 @@ class ContactStore {
       lastMessageAt: DateTime.fromMillisecondsSinceEpoch(
         lastMessageMs ?? lastSeenMs,
       ),
+      isActive: json['isActive'] as bool? ?? true,
+      rawPacket: json['rawPacket'] != null
+          ? Uint8List.fromList(base64Decode(json['rawPacket'] as String))
+          : null,
     );
   }
 }

lib/storage/unread_store.dart

@@ -32,7 +32,7 @@ class UnreadStore {
       return {};
     }
     final prefs = PrefsManager.instance;
-    String? jsonString = prefs.getString(_keyPrefix);
+    String? jsonString = prefs.getString(keyFor);
     if (jsonString == null || jsonString.isEmpty) {
       // Attempt migration from legacy unscoped key on first load
       final legacyJsonString = prefs.getString(_keyPrefix);