fix: refresh auto de la liste des téléchargements après ajout qBittorrent

Le QbittorrentProvider expose un callback onDownloadStarted qui est
appelé quand un téléchargement est lancé avec succès. Sur la page
downloads, ce callback déclenche un refresh de la liste.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/backoffice/app/(app)/downloads/DownloadsPage.tsx

@@ -185,7 +185,7 @@ export function DownloadsPage({ initialDownloads, initialLatestFound, qbConfigur
 
       {/* Available downloads from latest detection */}
       {initialLatestFound.length > 0 && (
-        <QbittorrentProvider initialConfigured={qbConfigured}>
+        <QbittorrentProvider initialConfigured={qbConfigured} onDownloadStarted={() => refresh(false)}>
           <div className="mt-10">
             <h2 className="text-xl font-bold text-foreground mb-4 flex items-center gap-2">
               <Icon name="search" size="lg" />

apps/backoffice/app/components/QbittorrentDownloadButton.tsx

@@ -4,9 +4,14 @@ import { useState, useEffect, createContext, useContext, type ReactNode } from "
 import { Icon } from "./ui";
 import { useTranslation } from "@/lib/i18n/context";
 
-const QbConfigContext = createContext(false);
+interface QbContextValue {
+  configured: boolean;
+  onDownloadStarted?: () => void;
+}
 
-export function QbittorrentProvider({ children, initialConfigured }: { children: ReactNode; initialConfigured?: boolean }) {
+const QbConfigContext = createContext<QbContextValue>({ configured: false });
+
+export function QbittorrentProvider({ children, initialConfigured, onDownloadStarted }: { children: ReactNode; initialConfigured?: boolean; onDownloadStarted?: () => void }) {
   const [configured, setConfigured] = useState(initialConfigured ?? false);
 
   useEffect(() => {
@@ -20,7 +25,7 @@ export function QbittorrentProvider({ children, initialConfigured }: { children:
       .catch(() => setConfigured(false));
   }, [initialConfigured]);
 
-  return <QbConfigContext.Provider value={configured}>{children}</QbConfigContext.Provider>;
+  return <QbConfigContext.Provider value={{ configured, onDownloadStarted }}>{children}</QbConfigContext.Provider>;
 }
 
 export function QbittorrentDownloadButton({
@@ -37,7 +42,7 @@ export function QbittorrentDownloadButton({
   expectedVolumes?: number[];
 }) {
   const { t } = useTranslation();
-  const configured = useContext(QbConfigContext);
+  const { configured, onDownloadStarted } = useContext(QbConfigContext);
   const [sending, setSending] = useState(false);
   const [sent, setSent] = useState(false);
   const [error, setError] = useState<string | null>(null);
@@ -63,6 +68,7 @@ export function QbittorrentDownloadButton({
         setError(data.error);
       } else if (data.success) {
         setSent(true);
+        onDownloadStarted?.();
       } else {
         setError(data.message || t("prowlarr.sentError"));
       }