fix: recover gracefully from stale sessions causing repeated 401s

The SPA's session check (/api/auth/session) is cached indefinitely by
react-query (staleTime: Infinity, no refetch on focus/interval), so once a
protected page mounts successfully, the app never re-verifies auth. If the
server-side session later becomes invalid (server restart with in-memory
sessions, cookie/session expiry, etc.), every subsequent API call
(pages, scheduled-posts, audio-tracks, media, media/upload, ...) starts
failing with 401 in a loop with no way for the user to recover short of a
manual page reload.

Add a shared handleUnauthorized() in queryClient.ts that redirects to
/login on any non-auth API 401, wired into both the shared fetch helpers
(apiRequest/getQueryFn) and the raw fetch() calls used for file uploads
and Remotion rendering, which also lacked this recovery path. Also add the
missing credentials: "include" to those raw fetch() calls for consistency
with the rest of the app's API requests.

client/src/components/media-upload.tsx

@@ -3,7 +3,7 @@ import { useDropzone } from "react-dropzone";
 import { Button } from "@/components/ui/button";
 import { Dialog, DialogContent } from "@/components/ui/dialog";
 import { useMutation, useQuery } from "@tanstack/react-query";
-import { apiRequest, queryClient } from "@/lib/queryClient";
+import { apiRequest, queryClient, handleUnauthorized } from "@/lib/queryClient";
 import { MediaThumbnail } from "@/components/media-thumbnail";
 import { CloudUpload, Image as ImageIcon, Video, X, Upload, Loader2, ZoomIn, Camera } from "lucide-react";
 import { useToast } from "@/hooks/use-toast";
@@ -30,8 +30,12 @@ export default function MediaUpload() {
       const response = await fetch("/api/media/upload", {
         method: "POST",
         body: formData,
+        credentials: "include",
       });
-      if (!response.ok) throw new Error("Upload failed");
+      if (!response.ok) {
+        if (response.status === 401) handleUnauthorized("/api/media/upload");
+        throw new Error("Upload failed");
+      }
       return response.json();
     },
     onSuccess: (data) => {
@@ -55,8 +59,12 @@ export default function MediaUpload() {
         const response = await fetch("/api/media/upload", {
           method: "POST",
           body: formData,
+          credentials: "include",
         });
-        if (!response.ok) throw new Error("Upload failed");
+        if (!response.ok) {
+          if (response.status === 401) handleUnauthorized("/api/media/upload");
+          throw new Error("Upload failed");
+        }
         successCount++;
         return response.json();
       } catch (error) {

client/src/lib/queryClient.ts

@@ -1,7 +1,30 @@
 import { QueryClient, QueryFunction } from "@tanstack/react-query";
 
-async function throwIfResNotOk(res: Response) {
+// Les routes d'authentification elles-mêmes ne doivent jamais déclencher
+// de redirection automatique (ex: mauvais mot de passe sur /login).
+function isAuthRoute(url: string): boolean {
+  return url.startsWith("/api/auth/");
+}
+
+// Si la session serveur a expiré (ex: redémarrage du serveur, expiration du
+// cookie) alors que la SPA pense toujours l'utilisateur connecté (le check
+// de session initial est mis en cache indéfiniment par react-query), toutes
+// les requêtes suivantes échouent silencieusement en 401 sans jamais
+// renvoyer l'utilisateur vers l'écran de connexion. On force donc un
+// rechargement vers /login dès qu'une requête API (hors routes d'auth)
+// renvoie 401, ce qui réinitialise aussi le cache react-query.
+export function handleUnauthorized(url: string) {
+  if (isAuthRoute(url) || window.location.pathname === "/login") {
+    return;
+  }
+  window.location.href = "/login";
+}
+
+async function throwIfResNotOk(res: Response, url: string) {
   if (!res.ok) {
+    if (res.status === 401) {
+      handleUnauthorized(url);
+    }
     const text = (await res.text()) || res.statusText;
     throw new Error(`${res.status}: ${text}`);
   }
@@ -19,7 +42,7 @@ export async function apiRequest(
     credentials: "include",
   });
 
-  await throwIfResNotOk(res);
+  await throwIfResNotOk(res, url);
   return res;
 }
 
@@ -29,7 +52,8 @@ export const getQueryFn: <T>(options: {
 }) => QueryFunction<T> =
   ({ on401: unauthorizedBehavior }) =>
   async ({ queryKey }) => {
-    const res = await fetch(queryKey.join("/") as string, {
+    const url = queryKey.join("/") as string;
+    const res = await fetch(url, {
       credentials: "include",
     });
 
@@ -37,7 +61,7 @@ export const getQueryFn: <T>(options: {
       return null;
     }
 
-    await throwIfResNotOk(res);
+    await throwIfResNotOk(res, url);
     return await res.json();
   };
 

client/src/pages/audio-admin.tsx

@@ -8,6 +8,7 @@ import { useToast } from "@/hooks/use-toast";
 import { Trash2, Music, Upload, Loader2, Play, Pause } from "lucide-react";
 import { format } from "date-fns";
 import { fr } from "date-fns/locale";
+import { handleUnauthorized } from "@/lib/queryClient";
 
 interface AudioTrack {
     id: number;
@@ -41,9 +42,11 @@ export default function AudioAdmin() {
             const res = await fetch("/api/audio-tracks", {
                 method: "POST",
                 body: formData,
+                credentials: "include",
             });
 
             if (!res.ok) {
+                if (res.status === 401) handleUnauthorized("/api/audio-tracks");
                 const error = await res.json();
                 throw new Error(error.error || "Erreur lors de l'upload");
             }
@@ -77,9 +80,11 @@ export default function AudioAdmin() {
         mutationFn: async (id: number) => {
             const res = await fetch(`/api/audio-tracks/${id}`, {
                 method: "DELETE",
+                credentials: "include",
             });
 
             if (!res.ok) {
+                if (res.status === 401) handleUnauthorized(`/api/audio-tracks/${id}`);
                 throw new Error("Erreur lors de la suppression");
             }
         },

client/src/pages/mobile/new-post.tsx

@@ -32,7 +32,7 @@ import { Checkbox } from "@/components/ui/checkbox";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { Dialog, DialogContent } from "@/components/ui/dialog";
 import { useToast } from "@/hooks/use-toast";
-import { apiRequest, queryClient } from "@/lib/queryClient";
+import { apiRequest, queryClient, handleUnauthorized } from "@/lib/queryClient";
 import type { SocialPage, Media, ScheduledPost } from "@shared/schema";
 import { PreviewModal } from "@/components/preview-modal";
 import { DateTimePicker } from "@/components/datetime-picker";
@@ -152,8 +152,12 @@ export default function NewPostMobile() {
       const response = await fetch("/api/media/upload", {
         method: "POST",
         body: formData,
+        credentials: "include",
       });
-      if (!response.ok) throw new Error("Upload failed");
+      if (!response.ok) {
+        if (response.status === 401) handleUnauthorized("/api/media/upload");
+        throw new Error("Upload failed");
+      }
       return response.json();
     },
     onSuccess: (data: Media) => {

client/src/pages/mobile/new-reel.tsx

@@ -16,7 +16,7 @@ import { Switch } from "@/components/ui/switch";
 import { Label } from "@/components/ui/label";
 import { Slider } from "@/components/ui/slider";
 import { useToast } from "@/hooks/use-toast";
-import { apiRequest, queryClient } from "@/lib/queryClient";
+import { apiRequest, queryClient, handleUnauthorized } from "@/lib/queryClient";
 import type { SocialPage, Media } from "@shared/schema";
 import { DateTimePicker } from "@/components/datetime-picker";
 import { Sheet, SheetContent, SheetTrigger } from "@/components/ui/sheet";
@@ -145,8 +145,10 @@ export default function MobileNewReel() {
             const response = await fetch("/api/media/upload", {
                 method: "POST",
                 body: formData,
+                credentials: "include",
             });
             if (!response.ok) {
+                if (response.status === 401) handleUnauthorized("/api/media/upload");
                 const errorText = await response.text();
                 throw new Error(`Upload failed: ${response.status} ${response.statusText} - ${errorText.substring(0, 100)}`);
             }

client/src/pages/mobile/remotion-video.tsx

@@ -13,7 +13,7 @@ import Sidebar from "@/components/sidebar";
 import { Checkbox } from "@/components/ui/checkbox";
 import { DateTimePicker } from "@/components/datetime-picker";
 import { useQuery, useMutation } from "@tanstack/react-query";
-import { apiRequest, queryClient } from "@/lib/queryClient";
+import { apiRequest, queryClient, handleUnauthorized } from "@/lib/queryClient";
 import type { Media, SocialPage } from "@shared/schema";
 
 interface AudioTrack { id: string; title: string; fileName: string; url: string; duration: number; }
@@ -152,8 +152,8 @@ export default function MobileRemotionVideoPage() {
       if (selectedPageIds[0]) formData.append("selectedPageId", selectedPageIds[0]);
       if (musicFile) { formData.append("music", musicFile); formData.append("musicVolume", String(musicVolume)); }
       else if (selectedTrack) { formData.append("musicTrackUrl", selectedTrack.url); formData.append("musicVolume", String(musicVolume)); }
-      const response = await fetch("/api/remotion/render", { method: "POST", body: formData });
+      const response = await fetch("/api/remotion/render", { method: "POST", body: formData, credentials: "include" });
-      if (!response.ok) { const e = await response.json().catch(() => ({})); throw new Error(e.error || "Erreur"); }
+      if (!response.ok) { if (response.status === 401) handleUnauthorized("/api/remotion/render"); const e = await response.json().catch(() => ({})); throw new Error(e.error || "Erreur"); }
       const data = await response.json();
       
       if (data.jobId) {
@@ -161,8 +161,11 @@ export default function MobileRemotionVideoPage() {
         
         const checkStatus = async () => {
           try {
-            const res = await fetch(`/api/remotion/render/status/${data.jobId}`);
+            const res = await fetch(`/api/remotion/render/status/${data.jobId}`, { credentials: "include" });
-            if (!res.ok) throw new Error("Erreur de suivi du rendu");
+            if (!res.ok) {
+              if (res.status === 401) handleUnauthorized(`/api/remotion/render/status/${data.jobId}`);
+              throw new Error("Erreur de suivi du rendu");
+            }
             const job = await res.json();
             
             if (job.status === 'done') {

client/src/pages/new-post.tsx

@@ -31,7 +31,7 @@ import { Checkbox } from "@/components/ui/checkbox";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { Dialog, DialogContent } from "@/components/ui/dialog";
 import { useToast } from "@/hooks/use-toast";
-import { apiRequest, queryClient } from "@/lib/queryClient";
+import { apiRequest, queryClient, handleUnauthorized } from "@/lib/queryClient";
 import { MediaThumbnail } from "@/components/media-thumbnail";
 import type { SocialPage, Media, ScheduledPost } from "@shared/schema";
 import { PreviewModal } from "@/components/preview-modal";
@@ -148,8 +148,12 @@ export default function NewPost() {
       const response = await fetch("/api/media/upload", {
         method: "POST",
         body: formData,
+        credentials: "include",
       });
-      if (!response.ok) throw new Error("Upload failed");
+      if (!response.ok) {
+        if (response.status === 401) handleUnauthorized("/api/media/upload");
+        throw new Error("Upload failed");
+      }
       return response.json();
     },
     onSuccess: (data) => {

client/src/pages/new-reel.tsx

@@ -25,7 +25,7 @@ import {
     SelectValue,
 } from "@/components/ui/select";
 import { useToast } from "@/hooks/use-toast";
-import { apiRequest, queryClient } from "@/lib/queryClient";
+import { apiRequest, queryClient, handleUnauthorized } from "@/lib/queryClient";
 import type { SocialPage, Media } from "@shared/schema";
 import { MediaThumbnail } from "@/components/media-thumbnail";
 import { DateTimePicker } from "@/components/datetime-picker";
@@ -166,8 +166,12 @@ export default function NewReel() {
             const response = await fetch("/api/media/upload", {
                 method: "POST",
                 body: formData,
+                credentials: "include",
             });
-            if (!response.ok) throw new Error("Upload failed");
+            if (!response.ok) {
+                if (response.status === 401) handleUnauthorized("/api/media/upload");
+                throw new Error("Upload failed");
+            }
             return response.json();
         },
         onSuccess: (data) => {

client/src/pages/remotion-video.tsx

@@ -8,7 +8,7 @@ import { Textarea } from "@/components/ui/textarea";
 import { UploadCloud, Video, Loader2, Check, Sparkles, Mic, Volume2, Music, Play, Pause, Send } from "lucide-react";
 import { Slider } from "@/components/ui/slider";
 import { useQuery, useMutation } from "@tanstack/react-query";
-import { apiRequest, queryClient } from "@/lib/queryClient";
+import { apiRequest, queryClient, handleUnauthorized } from "@/lib/queryClient";
 import { Label } from "@/components/ui/label";
 import { Switch } from "@/components/ui/switch";
 import { Checkbox } from "@/components/ui/checkbox";
@@ -119,8 +119,8 @@ export default function RemotionVideoPage() {
       if (selectedPageIds[0]) formData.append("selectedPageId", selectedPageIds[0]);
       if (musicFile) { formData.append("music", musicFile); formData.append("musicVolume", String(musicVolume)); }
       else if (selectedTrack) { formData.append("musicTrackUrl", selectedTrack.url); formData.append("musicVolume", String(musicVolume)); }
-      const response = await fetch("/api/remotion/render", { method: "POST", body: formData });
+      const response = await fetch("/api/remotion/render", { method: "POST", body: formData, credentials: "include" });
-      if (!response.ok) { const e = await response.json().catch(() => ({})); throw new Error(e.error || "Erreur"); }
+      if (!response.ok) { if (response.status === 401) handleUnauthorized("/api/remotion/render"); const e = await response.json().catch(() => ({})); throw new Error(e.error || "Erreur"); }
       const data = await response.json();
       
       if (data.jobId) {
@@ -128,8 +128,11 @@ export default function RemotionVideoPage() {
         
         const checkStatus = async () => {
           try {
-            const res = await fetch(`/api/remotion/render/status/${data.jobId}`);
+            const res = await fetch(`/api/remotion/render/status/${data.jobId}`, { credentials: "include" });
-            if (!res.ok) throw new Error("Erreur de suivi du rendu");
+            if (!res.ok) {
+              if (res.status === 401) handleUnauthorized(`/api/remotion/render/status/${data.jobId}`);
+              throw new Error("Erreur de suivi du rendu");
+            }
             const job = await res.json();
             
             if (job.status === 'done') {