Add NestJS fabric trade API with Prisma and Docker

Provide backend for admin and user apps with Postgres, migrations, seed data, and docker-compose for LiteSpeed reverse-proxy deployment.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/settings/dto/settings.dto.ts

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+import { IsBoolean, IsInt, IsOptional, IsString, Min } from 'class-validator';
+import { Type } from 'class-transformer';
+
+export class UpdateSettingsDto {
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt()
+  @Min(1)
+  maxMeteragePerInvoice?: number;
+
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt()
+  @Min(1)
+  cashInvoiceValidityHours?: number;
+
+  @IsOptional()
+  @IsBoolean()
+  defaultSettlementCheck?: boolean;
+
+  @IsOptional()
+  @IsBoolean()
+  defaultSettlementCash?: boolean;
+
+  @IsOptional()
+  @IsBoolean()
+  smsOrderRegistered?: boolean;
+
+  @IsOptional()
+  @IsBoolean()
+  smsPaymentReminder?: boolean;
+
+  @IsOptional()
+  @IsBoolean()
+  smsCheckReview?: boolean;
+
+  @IsOptional()
+  @IsBoolean()
+  smsShippingUpdate?: boolean;
+
+  @IsOptional()
+  @IsString()
+  supportPhone?: string | null;
+
+  @IsOptional()
+  @IsString()
+  supportEmail?: string | null;
+}

src/settings/settings.controller.ts

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+import { Body, Controller, Get, Patch } from '@nestjs/common';
+import { SettingsService } from './settings.service';
+import { AuthType } from '../common/decorators/auth.decorators';
+import { UpdateSettingsDto } from './dto/settings.dto';
+
+@Controller('admin/settings')
+@AuthType('admin')
+export class SettingsController {
+  constructor(private readonly settingsService: SettingsService) {}
+
+  @Get()
+  get() {
+    return this.settingsService.get();
+  }
+
+  @Patch()
+  update(@Body() dto: UpdateSettingsDto) {
+    return this.settingsService.update(dto);
+  }
+}

src/settings/settings.module.ts

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+import { Module } from '@nestjs/common';
+import { SettingsController } from './settings.controller';
+import { SettingsService } from './settings.service';
+
+@Module({
+  controllers: [SettingsController],
+  providers: [SettingsService],
+  exports: [SettingsService],
+})
+export class SettingsModule {}

src/settings/settings.service.ts

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+import { Injectable } from '@nestjs/common';
+import { PrismaService } from '../prisma/prisma.service';
+import { UpdateSettingsDto } from './dto/settings.dto';
+
+@Injectable()
+export class SettingsService {
+  constructor(private readonly prisma: PrismaService) {}
+
+  async get() {
+    const settings = await this.ensureDefaults();
+    return this.map(settings);
+  }
+
+  async update(dto: UpdateSettingsDto) {
+    await this.ensureDefaults();
+    const settings = await this.prisma.systemSettings.update({
+      where: { id: 'default' },
+      data: {
+        maxMeteragePerInvoice: dto.maxMeteragePerInvoice,
+        cashInvoiceValidityHours: dto.cashInvoiceValidityHours,
+        defaultSettlementCheck: dto.defaultSettlementCheck,
+        defaultSettlementCash: dto.defaultSettlementCash,
+        smsOrderRegistered: dto.smsOrderRegistered,
+        smsPaymentReminder: dto.smsPaymentReminder,
+        smsCheckReview: dto.smsCheckReview,
+        smsShippingUpdate: dto.smsShippingUpdate,
+        supportPhone:
+          dto.supportPhone === undefined
+            ? undefined
+            : dto.supportPhone?.trim() || null,
+        supportEmail:
+          dto.supportEmail === undefined
+            ? undefined
+            : dto.supportEmail?.trim() || null,
+      },
+    });
+    return this.map(settings);
+  }
+
+  private async ensureDefaults() {
+    return this.prisma.systemSettings.upsert({
+      where: { id: 'default' },
+      create: { id: 'default' },
+      update: {},
+    });
+  }
+
+  private map(settings: {
+    id: string;
+    maxMeteragePerInvoice: number;
+    cashInvoiceValidityHours: number;
+    defaultSettlementCheck: boolean;
+    defaultSettlementCash: boolean;
+    smsOrderRegistered: boolean;
+    smsPaymentReminder: boolean;
+    smsCheckReview: boolean;
+    smsShippingUpdate: boolean;
+    supportPhone: string | null;
+    supportEmail: string | null;
+    updatedAt: Date;
+  }) {
+    return {
+      id: settings.id,
+      maxMeteragePerInvoice: settings.maxMeteragePerInvoice,
+      cashInvoiceValidityHours: settings.cashInvoiceValidityHours,
+      defaultSettlementCheck: settings.defaultSettlementCheck,
+      defaultSettlementCash: settings.defaultSettlementCash,
+      smsOrderRegistered: settings.smsOrderRegistered,
+      smsPaymentReminder: settings.smsPaymentReminder,
+      smsCheckReview: settings.smsCheckReview,
+      smsShippingUpdate: settings.smsShippingUpdate,
+      supportPhone: settings.supportPhone,
+      supportEmail: settings.supportEmail,
+      updatedAt: settings.updatedAt.toISOString(),
+    };
+  }
+}