Preview: Dev-Anmeldung immer mit mode dev (R19)

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

server/services/previewDeploy.js

@@ -661,7 +661,7 @@ async function followRun({ repoFullName, project, token, runId, subdomain, job,
       }
       if (run.result === 'dev') {
         await patchProject(repoFullName, project, { ...base, previewState: 'sleeping' })
-        try { await runnerClient.startDev(subdomain, job) } catch (err) {
+        try { await runnerClient.startDev(subdomain, { ...job, mode: 'dev' }) } catch (err) {
           console.error('[previewDeploy] Dev-Registrierung fehlgeschlagen:', err.message)
         }
       } else {