fix

src/notifications/notifications.service.ts

@@ -1,6 +1,7 @@
 import { Injectable, Logger, OnModuleInit } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { OnEvent } from '@nestjs/event-emitter';
+import { Prisma } from '@prisma/client';
 import * as admin from 'firebase-admin';
 import { PrismaService } from '../prisma/prisma.service';
 
@@ -52,6 +53,11 @@ export class NotificationsService implements OnModuleInit {
     this.logger.log('Firebase Admin initialized for push notifications');
   }
 
+  private parseFcmTokens(raw: Prisma.JsonValue | null | undefined): FcmToken[] {
+    if (!raw || !Array.isArray(raw)) return [];
+    return raw as unknown as FcmToken[];
+  }
+
   async registerToken(
     userId: string,
     token: string,
@@ -62,7 +68,7 @@ export class NotificationsService implements OnModuleInit {
       select: { fcmTokens: true },
     });
 
-    const existingTokens: FcmToken[] = (user?.fcmTokens as FcmToken[]) || [];
+    const existingTokens = this.parseFcmTokens(user?.fcmTokens);
 
     // Remove existing entry for this token (if re-registering)
     const filtered = existingTokens.filter((t) => t.token !== token);
@@ -75,7 +81,7 @@ export class NotificationsService implements OnModuleInit {
 
     await this.prisma.user.update({
       where: { id: userId },
-      data: { fcmTokens: filtered },
+      data: { fcmTokens: filtered as unknown as Prisma.InputJsonValue },
     });
 
     this.logger.log(`FCM token registered for user ${userId} (${device})`);
@@ -87,12 +93,17 @@ export class NotificationsService implements OnModuleInit {
       select: { fcmTokens: true },
     });
 
-    const existingTokens: FcmToken[] = (user?.fcmTokens as FcmToken[]) || [];
+    const existingTokens = this.parseFcmTokens(user?.fcmTokens);
     const filtered = existingTokens.filter((t) => t.token !== token);
 
     await this.prisma.user.update({
       where: { id: userId },
-      data: { fcmTokens: filtered.length > 0 ? filtered : null },
+      data: {
+        fcmTokens:
+          filtered.length > 0
+            ? (filtered as unknown as Prisma.InputJsonValue)
+            : Prisma.JsonNull,
+      },
     });
 
     this.logger.log(`FCM token removed for user ${userId}`);
@@ -125,7 +136,7 @@ export class NotificationsService implements OnModuleInit {
       return;
     }
 
-    const tokens: FcmToken[] = (user.fcmTokens as FcmToken[]) || [];
+    const tokens = this.parseFcmTokens(user.fcmTokens);
     if (tokens.length === 0) {
       this.logger.debug(`No FCM tokens for user ${userId}`);
       return;
@@ -167,7 +178,10 @@ export class NotificationsService implements OnModuleInit {
           await this.prisma.user.update({
             where: { id: userId },
             data: {
-              fcmTokens: validTokens.length > 0 ? validTokens : null,
+              fcmTokens:
+                validTokens.length > 0
+                  ? (validTokens as unknown as Prisma.InputJsonValue)
+                  : Prisma.JsonNull,
             },
           });
           this.logger.log(