refactor: restructure

monorepo with apps/ and services/
  directories

services/mana-core-auth/src/common/guards/jwt-auth.guard.ts

@@ -0,0 +1,48 @@
+import { Injectable, CanActivate, ExecutionContext, UnauthorizedException } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import * as jwt from 'jsonwebtoken';
+
+@Injectable()
+export class JwtAuthGuard implements CanActivate {
+  constructor(private configService: ConfigService) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const request = context.switchToHttp().getRequest();
+    const token = this.extractTokenFromHeader(request);
+
+    if (!token) {
+      throw new UnauthorizedException('No token provided');
+    }
+
+    try {
+      const publicKey = this.configService.get<string>('jwt.publicKey');
+      if (!publicKey) {
+        throw new UnauthorizedException('JWT configuration error');
+      }
+      const audience = this.configService.get<string>('jwt.audience');
+      const issuer = this.configService.get<string>('jwt.issuer');
+
+      const payload = jwt.verify(token, publicKey, {
+        algorithms: ['RS256'],
+        audience,
+        issuer,
+      }) as jwt.JwtPayload;
+
+      // Attach user to request
+      request.user = {
+        userId: payload.sub,
+        email: payload.email,
+        role: payload.role,
+      };
+
+      return true;
+    } catch (error) {
+      throw new UnauthorizedException('Invalid token');
+    }
+  }
+
+  private extractTokenFromHeader(request: any): string | undefined {
+    const [type, token] = request.headers.authorization?.split(' ') ?? [];
+    return type === 'Bearer' ? token : undefined;
+  }
+}