installer: add wallet export feature at descriptor registration step

Author: pythcoiner

liana-gui/src/installer/message.rs

@@ -7,6 +7,7 @@ use std::path::PathBuf;
 use super::{context, Error};
 use crate::{
     download::{DownloadError, Progress},
+    export::ImportExportMessage,
     hw::HardwareWalletMessage,
     installer::step::descriptor::editor::key::Key,
     lianalite::client::{auth::AuthClient, backend::api},
@@ -44,6 +45,15 @@ pub enum Message {
     WalletRegistered(Result<(Fingerprint, Option<[u8; 32]>), Error>),
     MnemonicWord(usize, String),
     ImportMnemonic(bool),
+    BackupWallet,
+    ExportWallet(String),
+    ImportExport(ImportExportMessage),
+}
+
+impl From<ImportExportMessage> for Message {
+    fn from(value: ImportExportMessage) -> Self {
+        Message::ImportExport(value)
+    }
 }
 
 #[derive(Debug, Clone)]

liana-gui/src/installer/view/mod.rs

@@ -739,10 +739,17 @@ pub fn backup_descriptor<'a>(
                             ),
                         )
                         .push(
-                            Row::new().push(Column::new().width(Length::Fill)).push(
-                                button::secondary(Some(icon::clipboard_icon()), "Copy")
-                                    .on_press(Message::Clibpboard(descriptor.to_string())),
-                            ),
+                            Row::new()
+                                .push(Space::with_width(Length::Fill))
+                                .push(
+                                    button::secondary(Some(icon::wallet_icon()), "Backup")
+                                        .on_press(Message::BackupWallet),
+                                )
+                                .push(Space::with_width(10))
+                                .push(
+                                    button::secondary(Some(icon::clipboard_icon()), "Copy")
+                                        .on_press(Message::Clibpboard(descriptor.to_string())),
+                                ),
                         )
                         .spacing(10),
                 )