Add Retry for failed results

A failed plan item gets a Retry button on its card and in the preview. It
asks the engine for a fresh quote for that item and starts it again, while
the engine still allows another attempt (three per item).

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

src/i18n.ts

@@ -287,6 +287,9 @@ const en = {
   'res.creditsUsed': 'Credits used',
   'res.accepted': 'Approved.',
   'res.rejected': 'Rejected.',
+  'res.retry': 'Retry',
+  'res.retrying': 'Retrying…',
+  'res.retried': 'Production started again.',
   'res.audioNotice': 'Played with this device’s voice, which can differ between devices. Download the script to record it or use it in a TTS tool.',
   'res.fullScript': 'Show the full script',
   'res.scriptTxt': 'Script (.txt)',
@@ -621,6 +624,9 @@ const id: Record<Key, string> = {
   'res.creditsUsed': 'Kredit terpakai',
   'res.accepted': 'Disetujui.',
   'res.rejected': 'Ditolak.',
+  'res.retry': 'Coba lagi',
+  'res.retrying': 'Mencoba lagi…',
+  'res.retried': 'Produksi dimulai lagi.',
   'res.audioNotice': 'Diputar dengan suara perangkat ini, yang bisa berbeda antarperangkat. Unduh naskahnya untuk direkam atau dipakai di alat TTS.',
   'res.fullScript': 'Lihat naskah lengkap',
   'res.scriptTxt': 'Naskah (.txt)',