Merge develop: combine the i18n test fixture with #367

Both batches seed the same block for their English-only additions. One
read and one write now cover the PBS key guidance and the Borg SSH keys
together.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

AppImage/messages/en/common.json

@@ -4024,6 +4024,7 @@
       "passphraseNotSaved": "Passphrase is not saved.",
       "passphraseSaved": "Passphrase saved",
       "pbsHelpAfter": "for encrypted PBS restores.",
+      "pbsHelp": "Monitor uses {keyfile} with {option} for encrypted PBS backups and restores. The keyfile is stored with mode {mode}. Keep a safe copy outside this host.",
       "pbsHelpBefore": "PBS encryption uses",
       "pbsHelpEnd": "Keep a safe copy outside this host.",
       "pbsHelpMiddle": "as the keyfile",
@@ -4218,6 +4219,7 @@
       "orUploadFromMachine": "or upload one from this machine.",
       "orUploadOwn": "or upload your own keyfile.",
       "pveKeyDescriptionAfter": "and can be reused by Monitor.",
+      "pveKeyDescription": "PVE storage {storage} has a keyfile at {path}. You can import it into Monitor.",
       "pveKeyDescriptionBefore": "A PVE key exists at",
       "pveKeyDescriptionMiddle": "It matches PVE storage encryption",
       "pveKeyDetected": "PVE key detected",