fix(terminal): make the saved host-login state unmistakable in the modal

The stored secret is never echoed back (security), so on reopen the blank password field
read as "not configured" / "it forgot my password". The login DOES persist (single
HostCredential row, kept across reloads); only the modal was ambiguous.

- when configured, show a green status: "Configured as <user> — password is stored. Leave
  blank to keep it; enter a new one to change it." The Remove button + gear stay, so the
  operator can still change the password or switch access.

No behaviour change — set once, stays until changed/removed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lang/de/terminal.php

@@ -37,6 +37,7 @@ return [
     'host_field_key' => 'Privater SSH-Key',
     'host_field_passphrase' => 'Passphrase (optional)',
     'host_secret_keep' => 'Leer lassen, um das gespeicherte Passwort zu behalten',
+    'host_configured_note' => 'Eingerichtet als :user — Passwort ist gespeichert. Leer lassen zum Behalten; neues eingeben zum Ändern.',
     'host_secret_required_for_auth_change' => 'Bei Wechsel der Authentifizierungsmethode muss das Login neu eingegeben werden.',
     'host_security_note' => 'Dieses Login gibt dem Web-Terminal eine Shell auf dem Host. Verschlüsselt gespeichert, nur über das interne Netz genutzt.',
     'host_save' => 'Speichern',

lang/en/terminal.php

@@ -37,6 +37,7 @@ return [
     'host_field_key' => 'Private SSH key',
     'host_field_passphrase' => 'Passphrase (optional)',
     'host_secret_keep' => 'Leave blank to keep the stored password',
+    'host_configured_note' => 'Configured as :user — password is stored. Leave blank to keep it; enter a new one to change it.',
     'host_secret_required_for_auth_change' => 'Switching the authentication method requires entering the login again.',
     'host_security_note' => 'This login gives the web terminal a shell on the host. Stored encrypted, used only over the internal network.',
     'host_save' => 'Save',

resources/views/livewire/modals/host-shell.blade.php

@@ -9,6 +9,15 @@
         </div>
     </div>
 
+    @if ($configured)
+        {{-- Make the saved state unmistakable: the stored secret is never shown (security), so without
+             this the empty password field reads as "not configured". --}}
+        <div class="mt-4 flex items-start gap-2 rounded-md border border-online/25 bg-online/5 px-3 py-2.5 font-mono text-[11px] leading-relaxed text-ink-2">
+            <x-icon name="shield" class="mt-px h-3.5 w-3.5 shrink-0 text-online" />
+            <span>{{ __('terminal.host_configured_note', ['user' => $username]) }}</span>
+        </div>
+    @endif
+
     <div class="mt-4 space-y-3">
         {{-- Target is fixed to the local machine (the Docker host) — only the login is asked for. --}}
         <div class="grid grid-cols-1 gap-3 sm:grid-cols-3">