feat(names): UI warning when no server resolves names

Mirror core USWNoNamesServers: add the NoNamesServers variant to
UserServersWarning (Kotlin sealed class + Swift enum) and its
globalWarning / globalServersWarning branch, rendered by the existing
ServersWarningFooter / ServersWarningView. Matches the noChatRelays
warning exactly.

apps/ios/Shared/Model/AppAPITypes.swift

@@ -1825,6 +1825,7 @@ struct UserOperatorServers: Identifiable, Equatable, Codable {
 
 public enum UserServersWarning: Decodable {
     case noChatRelays(user: UserRef?)
+    case noNamesServers(user: UserRef?)
 }
 
 enum UserServersError: Decodable {

apps/ios/Shared/Views/UserSettings/NetworkAndServers/NetworkAndServers.swift

@@ -417,6 +417,14 @@ func globalServersWarning(_ serverWarnings: [UserServersWarning]) -> String? {
                     user.localDisplayName
                 ) + " " + text
             } else { return text }
+        case let .noNamesServers(user):
+            let text = NSLocalizedString("No servers to resolve names.", comment: "servers warning")
+            if let user = user {
+                return String.localizedStringWithFormat(
+                    NSLocalizedString("For chat profile %@:", comment: "servers warning"),
+                    user.localDisplayName
+                ) + " " + text
+            } else { return text }
         }
     }
     return nil

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/model/SimpleXAPI.kt

@@ -4642,6 +4642,7 @@ sealed class UserServersError {
 @Serializable
 sealed class UserServersWarning {
   @Serializable @SerialName("noChatRelays") data class NoChatRelays(val user: UserRef? = null): UserServersWarning()
+  @Serializable @SerialName("noNamesServers") data class NoNamesServers(val user: UserRef? = null): UserServersWarning()
 
   val globalWarning: String?
     get() = when (this) {
@@ -4651,6 +4652,12 @@ sealed class UserServersWarning {
           String.format(generalGetString(MR.strings.for_chat_profile), user.localDisplayName) + " " + text
         } else text
       }
+      is NoNamesServers -> {
+        val text = generalGetString(MR.strings.no_names_servers_enabled)
+        if (user != null) {
+          String.format(generalGetString(MR.strings.for_chat_profile), user.localDisplayName) + " " + text
+        } else text
+      }
     }
 }
 

apps/multiplatform/common/src/commonMain/resources/MR/base/strings.xml

@@ -146,6 +146,7 @@
   <string name="for_chat_profile">For chat profile %s:</string>
   <string name="errors_in_servers_configuration">Errors in servers configuration.</string>
   <string name="no_chat_relays_enabled">No chat relays enabled.</string>
+  <string name="no_names_servers_enabled">No servers to resolve names.</string>
   <string name="server_warning">Server warning</string>
   <string name="error_accepting_operator_conditions">Error accepting conditions</string>
   <string name="blocking_reason_spam">Spam</string>