feat: Implement notification preferences management for both users and agents.

src/users/users.service.ts

@@ -400,4 +400,45 @@ export class UsersService {
       message: `Verification ${data.status.toLowerCase()} successfully`,
     };
   }
+
+  // =============================================
+  // NOTIFICATION PREFERENCES
+  // =============================================
+
+  async getNotificationPreferences(userId: string) {
+    const user = await this.prisma.user.findUnique({
+      where: { id: userId },
+      select: { notificationPreferences: true },
+    });
+
+    if (!user) {
+      throw new NotFoundException('User not found');
+    }
+
+    // Return preferences or default empty object
+    return user.notificationPreferences || { email: {}, push: {} };
+  }
+
+  async updateNotificationPreferences(
+    userId: string,
+    preferences: { email?: Record<string, boolean>; push?: Record<string, boolean> },
+  ) {
+    const user = await this.prisma.user.findUnique({
+      where: { id: userId },
+    });
+
+    if (!user) {
+      throw new NotFoundException('User not found');
+    }
+
+    const updatedUser = await this.prisma.user.update({
+      where: { id: userId },
+      data: {
+        notificationPreferences: preferences,
+      },
+      select: { notificationPreferences: true },
+    });
+
+    return updatedUser.notificationPreferences;
+  }
 }