fix(routes): resolve superOAuthId → DB userId — critical auth bug

req.user.id = SuperOAuth UUID, pas l'UUID TypeORM en DB.
Sans ce fix : getUserPlanLevel retourne toujours 0, ownerId ne matche jamais.

- video.routes: resolveDbUserId avant getUserPlanLevel
- playlist.routes: resolveDbUserId sur toutes les opérations owner/member

backend/src/routes/playlist.routes.ts

@@ -2,25 +2,34 @@ import { Router, Request, Response } from "express";
 import { AppDataSource } from "../config/data-source";
 import { Playlist } from "../entities/Playlist";
 import { PlaylistShare } from "../entities/PlaylistShare";
+import { User } from "../entities/User";
 import { requireAuth, AuthenticatedRequest } from "../middleware/auth.middleware";
 
 const router = Router();
 
+/** Résout le superOAuthId vers l'UUID DB, crée le user si inexistant */
+async function resolveDbUserId(superOAuthId: string): Promise<string | null> {
+  const user = await AppDataSource.getRepository(User).findOne({ where: { superOAuthId } });
+  return user?.id ?? null;
+}
+
 /**
  * GET /api/playlists
  * Playlists publiques + playlists partagées avec l'utilisateur connecté.
  */
 router.get("/", requireAuth, async (req: Request, res: Response): Promise<void> => {
   const { user } = req as AuthenticatedRequest;
+  const dbUserId = await resolveDbUserId(user.id);
+  if (!dbUserId) { res.status(401).json({ success: false, error: "USER_NOT_FOUND" }); return; }
 
   try {
     const owned = await AppDataSource.getRepository(Playlist).find({
-      where: { ownerId: user.id },
+      where: { ownerId: dbUserId },
       order: { createdAt: "DESC" },
     });
 
     const shared = await AppDataSource.getRepository(PlaylistShare).find({
-      where: { userId: user.id, status: "active" },
+      where: { userId: dbUserId, status: "active" },
       relations: ["playlist"],
     });
 
@@ -53,10 +62,13 @@ router.post("/", requireAuth, async (req: Request, res: Response): Promise<void>
     return;
   }
 
+  const dbUserId = await resolveDbUserId(user.id);
+  if (!dbUserId) { res.status(401).json({ success: false, error: "USER_NOT_FOUND" }); return; }
+
   try {
     const playlist = AppDataSource.getRepository(Playlist).create({
       id: require("crypto").randomUUID(),
-      ownerId: user.id,
+      ownerId: dbUserId,
       title: title.trim(),
       description: description ?? null,
       visibility: visibility ?? "private",
@@ -76,6 +88,8 @@ router.post("/", requireAuth, async (req: Request, res: Response): Promise<void>
  */
 router.get("/:id", requireAuth, async (req: Request, res: Response): Promise<void> => {
   const { user } = req as AuthenticatedRequest;
+  const dbUserId = await resolveDbUserId(user.id);
+  if (!dbUserId) { res.status(401).json({ success: false, error: "USER_NOT_FOUND" }); return; }
 
   try {
     const playlist = await AppDataSource.getRepository(Playlist).findOne({
@@ -88,8 +102,8 @@ router.get("/:id", requireAuth, async (req: Request, res: Response): Promise<voi
       return;
     }
 
-    const isOwner = playlist.ownerId === user.id;
-    const share = playlist.shares.find((s) => s.userId === user.id && s.status === "active");
+    const isOwner = playlist.ownerId === dbUserId;
+    const share = playlist.shares.find((s) => s.userId === dbUserId && s.status === "active");
     const isPublic = playlist.visibility === "public";
 
     if (!isOwner && !share && !isPublic) {
@@ -121,6 +135,8 @@ router.get("/:id", requireAuth, async (req: Request, res: Response): Promise<voi
 router.post("/:id/share", requireAuth, async (req: Request, res: Response): Promise<void> => {
   const { user } = req as AuthenticatedRequest;
   const { userId, permission } = req.body as { userId?: string; permission?: "view" | "edit" };
+  const dbUserId = await resolveDbUserId(user.id);
+  if (!dbUserId) { res.status(401).json({ success: false, error: "USER_NOT_FOUND" }); return; }
 
   try {
     const playlist = await AppDataSource.getRepository(Playlist).findOneBy({ id: req.params.id });
@@ -130,7 +146,7 @@ router.post("/:id/share", requireAuth, async (req: Request, res: Response): Prom
       return;
     }
 
-    if (playlist.ownerId !== user.id) {
+    if (playlist.ownerId !== dbUserId) {
       res.status(403).json({ success: false, error: "FORBIDDEN" });
       return;
     }
@@ -165,11 +181,13 @@ router.patch("/:id/share/:shareId", requireAuth, async (req: Request, res: Respo
     permission?: "view" | "edit";
     status?: "active" | "revoked";
   };
+  const dbUserId = await resolveDbUserId(user.id);
+  if (!dbUserId) { res.status(401).json({ success: false, error: "USER_NOT_FOUND" }); return; }
 
   try {
     const playlist = await AppDataSource.getRepository(Playlist).findOneBy({ id: req.params.id });
 
-    if (!playlist || playlist.ownerId !== user.id) {
+    if (!playlist || playlist.ownerId !== dbUserId) {
       res.status(403).json({ success: false, error: "FORBIDDEN" });
       return;
     }

backend/src/routes/video.routes.ts

@@ -1,15 +1,24 @@
 import { Router, Request, Response } from "express";
 import { AppDataSource } from "../config/data-source";
 import { Video } from "../entities/Video";
+import { User } from "../entities/User";
 import { requireAuth, AuthenticatedRequest, AuthenticatedUser } from "../middleware/auth.middleware";
 import { UserSubscription } from "../entities/UserSubscription";
 
 const router = Router();
 
+/** Résout le superOAuthId vers l'UUID DB, retourne null si user inconnu */
+async function resolveDbUserId(superOAuthId: string): Promise<string | null> {
+  const user = await AppDataSource.getRepository(User).findOne({ where: { superOAuthId } });
+  return user?.id ?? null;
+}
+
 /** Récupère le niveau de plan actif d'un user (0 = free si aucun abonnement actif) */
-async function getUserPlanLevel(userId: string): Promise<number> {
+async function getUserPlanLevel(superOAuthId: string): Promise<number> {
+  const dbUserId = await resolveDbUserId(superOAuthId);
+  if (!dbUserId) return 0;
   const sub = await AppDataSource.getRepository(UserSubscription).findOne({
-    where: { userId, status: "active" },
+    where: { userId: dbUserId, status: "active" },
     relations: ["plan"],
     order: { startsAt: "DESC" },
   });