feat: complete Phase 1 foundation scaffold

- Monorepo: Turborepo + pnpm workspaces with 7 apps/packages
- Backend: NestJS scaffold with 9 modules (auth, tenant, curriculum, simulation, portfolio, ai-coach, analytics, classroom, gamification)
- Frontend: React 18 + Vite + TailwindCSS + shadcn/ui with 10 pages, 14 UI primitives, 3 Zustand stores
- Database: Prisma schema with 19 models, 13 enums, seed script, multi-tenant ready
- Docker: Dev, production, and Portainer Compose files with Traefik reverse proxy
- Configuration: .env.example (47 vars), Zod validation, frontend-safe env exposure
- i18n: English + Greek locale files (10 files), ICU MessageFormat, react-i18next
- Shared packages: @investplay/types, @investplay/ui, @investplay/i18n, @investplay/utils
- CI/CD: GitHub Actions (lint, typecheck, test, build, deploy, PR checks)
- Documentation: CONTEXT.md, ARCHITECTURE.md (10 Mermaid diagrams), API.md, LOCALIZATION.md, DEVELOPMENT-ROADMAP.md
- Infrastructure: Dockerfiles (dev + prod), nginx configs, backup/healthcheck scripts
- Security: JWT auth guards, role-based access, rate limiting, Helmet, CORS, PII sanitization

apps/api/src/modules/auth/dto/login.input.ts

@@ -0,0 +1,14 @@
+import { Field, InputType } from "@nestjs/graphql";
+import { IsEmail, IsString, MinLength } from "class-validator";
+
+@InputType()
+export class LoginInput {
+  @Field()
+  @IsEmail()
+  email: string;
+
+  @Field()
+  @IsString()
+  @MinLength(1)
+  password: string;
+}

apps/api/src/modules/auth/dto/register.input.ts

@@ -0,0 +1,34 @@
+import { Field, InputType, Boolean as GraphQLBoolean } from "@nestjs/graphql";
+import { IsEmail, IsString, MinLength, IsBoolean, IsOptional, IsIn } from "class-validator";
+
+@InputType()
+export class RegisterInput {
+  @Field()
+  @IsEmail()
+  email: string;
+
+  @Field()
+  @IsString()
+  @MinLength(8)
+  password: string;
+
+  @Field()
+  @IsString()
+  @MinLength(1)
+  firstName: string;
+
+  @Field()
+  @IsString()
+  @MinLength(1)
+  lastName: string;
+
+  @Field({ nullable: true, defaultValue: "en" })
+  @IsOptional()
+  @IsString()
+  @IsIn(["en", "el"])
+  locale?: string;
+
+  @Field(() => GraphQLBoolean)
+  @IsBoolean()
+  acceptTerms: boolean;
+}

apps/api/src/modules/auth/dto/token-response.dto.ts

@@ -0,0 +1,13 @@
+import { Field, ObjectType, Int } from "@nestjs/graphql";
+
+@ObjectType()
+export class TokenResponse {
+  @Field()
+  accessToken: string;
+
+  @Field()
+  refreshToken: string;
+
+  @Field(() => Int)
+  expiresIn: number;
+}