fix(07): SMTP test warns when connection passes but no auth configured

Server reachable without credentials (port 25 open relay) returns
{ success: true, warning: 'no_auth' } instead of green success.
Frontend shows red warning: server reachable but emails will fail.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/src/components/settings/smtp-settings-form.tsx

@@ -115,7 +115,9 @@ export function SmtpSettingsForm() {
     setTestFeedback({ type: 'loading', message: t('smtp.testTesting') });
     try {
       const result = await testSmtp(buildPayload());
-      if (result.success) {
+      if (result.success && result.warning === 'no_auth') {
+        setTestFeedback({ type: 'error', message: t('smtp.testNoAuth') });
+      } else if (result.success) {
         setTestFeedback({ type: 'success', message: t('smtp.testSuccess') });
       } else {
         setTestFeedback({ type: 'error', message: t('smtp.testFailed') });

apps/web/src/lib/settings-api.ts

@@ -77,7 +77,7 @@ export async function saveSmtp(payload: SaveSmtpPayload): Promise<SmtpConfig> {
  */
 export async function testSmtp(
   payload: SaveSmtpPayload,
-): Promise<{ success: boolean }> {
+): Promise<{ success: boolean; warning?: string }> {
   const res = await fetch(`${API_URL}/settings/smtp/test`, {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },

apps/web/src/messages/de.json

@@ -135,7 +135,8 @@
       "hidePassword": "Passwort verbergen",
       "testTesting": "Verbindung wird getestet...",
       "testSuccess": "Verbindung erfolgreich",
-      "testFailed": "Verbindung fehlgeschlagen"
+      "testFailed": "Verbindung fehlgeschlagen",
+      "testNoAuth": "Server erreichbar, aber keine Zugangsdaten konfiguriert — E-Mail-Versand wird fehlschlagen"
     }
   },
   "widgets": {