feat: enhance user service with role assignment and frontend scroll-area ref support

- Updated `users.service.ts` to assign user roles dynamically based on RBAC.
- Enhanced JWT generation to include the user's role in `auth.service.ts`.
- Added `viewportRef` prop support to `ScrollArea` component in the frontend for improved flexibility.

backend/src/auth/auth.service.ts

@@ -207,6 +207,7 @@ export class AuthService {
 		const accessToken = await this.jwtService.generateJwt({
 			sub: user.uuid,
 			username: user.username,
+			role: user.role,
 		});
 
 		return {

backend/src/users/users.service.ts

@@ -45,7 +45,19 @@ export class UsersService {
 	}
 
 	async findByEmailHash(emailHash: string) {
-		return await this.usersRepository.findByEmailHash(emailHash);
+		const user = await this.usersRepository.findByEmailHash(emailHash);
+		if (!user) return null;
+
+		const roles = await this.rbacService.getUserRoles(user.uuid);
+		return {
+			...user,
+			role: roles.includes("admin")
+				? "admin"
+				: roles.includes("moderator")
+					? "moderator"
+					: "user",
+			roles,
+		};
 	}
 
 	async findOneWithPrivateData(uuid: string) {
@@ -95,7 +107,19 @@ export class UsersService {
 	}
 
 	async findOne(uuid: string) {
-		return await this.usersRepository.findOne(uuid);
+		const user = await this.usersRepository.findOne(uuid);
+		if (!user) return null;
+
+		const roles = await this.rbacService.getUserRoles(user.uuid);
+		return {
+			...user,
+			role: roles.includes("admin")
+				? "admin"
+				: roles.includes("moderator")
+					? "moderator"
+					: "user",
+			roles,
+		};
 	}
 
 	async update(uuid: string, data: UpdateUserDto) {

frontend/src/components/ui/scroll-area.tsx

@@ -8,8 +8,11 @@ import { cn } from "@/lib/utils";
 function ScrollArea({
 	className,
 	children,
+	viewportRef,
 	...props
-}: React.ComponentProps<typeof ScrollAreaPrimitive.Root>) {
+}: React.ComponentProps<typeof ScrollAreaPrimitive.Root> & {
+	viewportRef?: React.Ref<HTMLDivElement>;
+}) {
 	return (
 		<ScrollAreaPrimitive.Root
 			data-slot="scroll-area"
@@ -18,6 +21,7 @@ function ScrollArea({
 		>
 			<ScrollAreaPrimitive.Viewport
 				data-slot="scroll-area-viewport"
+				ref={viewportRef}
 				className="focus-visible:ring-ring/50 size-full rounded-[inherit] transition-[color,box-shadow] outline-none focus-visible:ring-[3px] focus-visible:outline-1"
 			>
 				{children}