Checkpoint: Correctifs validés en sandbox : retour contextuel depuis le détail vers Factures BAP avec filtres et tri conservés, et nouvelle action Abonnement Oui/Non/Ne pas modifier dans les automatismes. Ajout de tests de non-régression.

client/src/pages/InvoiceDetail.tsx

@@ -1,5 +1,5 @@
 import { useState, useEffect } from "react";
-import { useParams, useLocation } from "wouter";
+import { useParams, useLocation, useSearch } from "wouter";
 import DashboardLayout from "@/components/DashboardLayout";
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
 import { Button } from "@/components/ui/button";
@@ -9,10 +9,13 @@ import { Badge } from "@/components/ui/badge";
 import { trpc } from "@/lib/trpc";
 import { ArrowLeft, Save, FileText } from "lucide-react";
 import { toast } from "sonner";
+import { getBapReturnLocation } from "@/lib/bapNavigation";
 
 export default function InvoiceDetail() {
   const { id } = useParams<{ id: string }>();
   const [, setLocation] = useLocation();
+  const detailSearch = useSearch();
+  const returnLocation = getBapReturnLocation(detailSearch);
   const invoiceId = parseInt(id || "0");
   
   const { data: invoice, isLoading } = trpc.invoices.getById.useQuery({ id: invoiceId });
@@ -172,7 +175,7 @@ export default function InvoiceDetail() {
           <FileText className="w-16 h-16 text-gray-300 mb-4" />
           <h2 className="text-2xl font-bold mb-2">Facture introuvable</h2>
           <p className="text-gray-500 mb-4">Cette facture n'existe pas ou a été supprimée</p>
-          <Button onClick={() => setLocation("/invoices")}>
+          <Button onClick={() => setLocation(returnLocation)}>
             <ArrowLeft className="w-4 h-4 mr-2" />
             Retour aux factures
           </Button>
@@ -187,7 +190,7 @@ export default function InvoiceDetail() {
         {/* Header */}
         <div className="flex items-center justify-between">
           <div className="flex items-center gap-4">
-            <Button variant="ghost" onClick={() => setLocation("/invoices")}>
+            <Button variant="ghost" onClick={() => setLocation(returnLocation)}>
               <ArrowLeft className="w-4 h-4 mr-2" />
               Retour
             </Button>