add ai job queue

src/lib/app-settings.ts

@@ -202,3 +202,15 @@ export function getEffectiveAiConfig(libraryId: string): AiConfig {
     promptTranslate: overrides.promptTranslate || global.promptTranslate,
   }
 }
+
+// ─── AI Max Retries ──────────────────────────────────────────────────────────
+
+export function getAiMaxRetries(): number {
+  const raw = getSetting('ai_max_retries')
+  const parsed = parseInt(raw ?? '3', 10)
+  return Number.isFinite(parsed) && parsed >= 0 ? parsed : 3
+}
+
+export function setAiMaxRetries(n: number): void {
+  setSetting('ai_max_retries', String(Math.max(0, Math.floor(n))))
+}