Backup: export everything (hosts, groups, keys, passwords, snippets, forwards, VPNs, known hosts, history, settings), optionally encrypted with a password (scrypt + AES-256-GCM); import asks for the password, can merge or replace existing data and optionally restore settings; old backups still import; shared module for desktop, web and Android (src/core/backup.js)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/renderer/app.js

@@ -1072,8 +1072,8 @@ async function viewSettings(page) {
   const dataCard = h(`<div class="settings-card"><h3>${T('Data')}</h3><p style="color:var(--muted);margin-top:0">${WEB ? T('Your vault is stored on the server, encrypted with a key that only your login password can unlock.') : S.vault.encrypted ? T('The vault is encrypted with the operating system keyring (Windows DPAPI / libsecret or KWallet).') : T('The vault is not encrypted because no keyring is available. On Arch/CachyOS: install <code>gnome-keyring</code> or <code>kwallet</code>.')}</p><div class="row" style="flex-wrap:wrap"></div></div>`);
   const btns = [
     ...(WEB ? [] : [[T('Import ~/.ssh/config'), importSshConfig]]),
-    [T('Export backup'), async () => { const p = await call('vault:export'); if (p) toast(T('Exported to {path}', { path: p }), 'ok'); }],
-    [T('Import backup'), async () => { if (await call('vault:import')) { toast(T('Import complete'), 'ok'); reload(); } }],
+    [T('Export backup'), exportBackup],
+    [T('Import backup'), importBackup],
   ];
   btns.forEach(([l, fn]) => { const b = h(`<button class="btn">${esc(l)}</button>`); b.onclick = fn; $('.row', dataCard).append(b); });
 
@@ -1416,6 +1416,65 @@ async function importRdm() {
   $('[data-view=hosts]').click();
 }
 
+// ============================================================ Backup
+const BACKUP_ERRORS = () => ({ INVALID: T('This file is not a MrTerm backup.'), WRONG_PASSWORD: T('Wrong password.'), PASSWORD_REQUIRED: T('This backup is encrypted. Please enter the password.') });
+const backupError = (e) => BACKUP_ERRORS()[e.message] || e.message;
+
+async function exportBackup() {
+  let err = '';
+  for (;;) {
+    const r = await modal({
+      title: T('Export backup'),
+      body: `<p style="margin-top:0;color:var(--muted)">${T('Exports all hosts, groups, SSH keys, passwords, snippets, port forwards, VPNs, known hosts and settings.')}</p>
+        ${err ? `<p style="color:var(--red)">${esc(err)}</p>` : ''}
+        ${field(T('Password'), 'pw', '', { type: 'password', hint: T('Recommended. Without a password, keys and passwords are stored in plain text in the file.') }).outerHTML}
+        ${field(T('Repeat password'), 'pw2', '', { type: 'password' }).outerHTML}
+        ${check(T('Include settings'), 'settings', true).outerHTML}`,
+      buttons: [{ label: T('Cancel'), value: null, cls: 'ghost' }, { label: T('Export'), value: 'form', cls: 'primary' }],
+    });
+    if (!r) return;
+    if (r.pw !== r.pw2) { err = T('The passwords do not match.'); continue; }
+    if (r.pw && r.pw.length < 8) { err = T('The password must be at least 8 characters long.'); continue; }
+    if (!r.pw && !(await confirmBox(T('Export without password?'), T('Private keys and passwords will be readable by anyone who gets the file.'), T('Export')))) continue;
+    try {
+      const content = await api.call('backup:export', { password: r.pw, settings: r.settings });
+      const name = `mrterm-backup-${new Date().toISOString().slice(0, 10)}${r.pw ? '-encrypted' : ''}.json`;
+      const p = await call('backup:saveFile', content, name);
+      if (p) toast(T('Exported to {path}', { path: p }), 'ok');
+    } catch (e) { toast(backupError(e), 'error'); }
+    return;
+  }
+}
+
+async function importBackup() {
+  const f = await call('import:pickFile', 'MrTerm Backup', ['json']);
+  if (!f) return;
+  let info;
+  try { info = await api.call('backup:inspect', f.content); } catch (e) { return toast(backupError(e), 'error'); }
+  const c = info.counts;
+  const summary = c ? T('{hosts} hosts, {keys} keys, {snippets} snippets, {vpns} VPNs', c) : T('Contents are encrypted.');
+  let err = '';
+  for (;;) {
+    const r = await modal({
+      title: T('Import backup'),
+      body: `<p style="margin-top:0;color:var(--muted)">${esc(f.name)}${info.createdAt ? ' · ' + esc(new Date(info.createdAt).toLocaleString()) : ''}<br>${esc(summary)}</p>
+        ${err ? `<p style="color:var(--red)">${esc(err)}</p>` : ''}
+        ${info.encrypted ? field(T('Password'), 'pw', '', { type: 'password' }).outerHTML : ''}
+        ${check(T('Import settings'), 'settings', false).outerHTML}
+        ${check(T('Replace existing data (entries not contained in the backup are deleted)'), 'replace', false).outerHTML}`,
+      buttons: [{ label: T('Cancel'), value: null, cls: 'ghost' }, { label: T('Import'), value: 'form', cls: 'primary' }],
+    });
+    if (!r) return;
+    if (r.replace && !(await confirmBox(T('Replace existing data?'), T('Hosts, keys, snippets and other entries that are not in the backup will be deleted.'), T('Replace')))) continue;
+    try {
+      const n = await api.call('backup:import', f.content, r.pw || '', { replace: r.replace, settings: r.settings });
+      toast(T('Import complete: {hosts} hosts, {keys} keys, {snippets} snippets', n), 'ok');
+      reload();
+      return;
+    } catch (e) { err = backupError(e); }
+  }
+}
+
 // ============================================================ Updates
 let updateInfo = null;
 let updateDialogOpen = false; // Auto-Prüfung beim Start und manuelle Prüfung sollen keine zwei Dialoge stapeln