feat(tenant): 租户品牌定制（brand_name/logo_url/theme_color/copyright + GET /auth/brand）

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

prisma/migrations/20261011142924_tenant_brand/migration.sql

@@ -0,0 +1,5 @@
+-- AlterTable
+ALTER TABLE `sys_tenant` ADD COLUMN `brand_name` VARCHAR(64) NULL,
+    ADD COLUMN `copyright` VARCHAR(255) NULL,
+    ADD COLUMN `logo_url` VARCHAR(255) NULL,
+    ADD COLUMN `theme_color` VARCHAR(16) NULL;

prisma/schema.prisma

@@ -12,14 +12,18 @@ datasource db {
 
 /// 租户
 model Tenant {
-  id        String   @id @default(uuid(7)) @db.VarChar(36)
+  id         String   @id @default(uuid(7)) @db.VarChar(36)
-  code      String   @unique @db.VarChar(64)
+  code       String   @unique @db.VarChar(64)
-  name      String   @db.VarChar(128)
+  name       String   @db.VarChar(128)
-  status    String   @default("enabled") @db.VarChar(16)
+  status     String   @default("enabled") @db.VarChar(16)
-  remark    String?  @db.VarChar(255)
+  remark     String?  @db.VarChar(255)
-  createdAt DateTime @default(now()) @map("created_at")
+  brandName  String?  @map("brand_name") @db.VarChar(64)
-  createdBy String?  @map("created_by") @db.VarChar(36)
+  logoUrl    String?  @map("logo_url") @db.VarChar(255)
-  updatedAt DateTime @updatedAt @map("updated_at")
+  themeColor String?  @map("theme_color") @db.VarChar(16)
+  copyright  String?  @db.VarChar(255)
+  createdAt  DateTime @default(now()) @map("created_at")
+  createdBy  String?  @map("created_by") @db.VarChar(36)
+  updatedAt  DateTime @updatedAt @map("updated_at")
 
   @@map("sys_tenant")
 }

src/auth/auth.controller.ts

@@ -49,6 +49,14 @@ export class AuthController {
     return this.auth.getPermissionSet(ctx.tenantCode, ctx.userId);
   }
 
+  /** 当前租户品牌（仅需登录）。 */
+  @Get('brand')
+  brand() {
+    const ctx = getRequestContext();
+    if (!ctx) throw new UnauthorizedException('未登录');
+    return this.auth.getBrand(ctx.tenantCode);
+  }
+
   /** 修改本人密码（仅需登录）。 */
   @Patch('me/password')
   changePassword(@Body() dto: ChangePasswordDto) {

src/auth/auth.service.ts

@@ -439,6 +439,25 @@ export class AuthService {
     return (await this.redis.getJson(sessionRevokedKey(sid))) != null;
   }
 
+  /** 当前租户品牌（登录后前端拉取应用）。 */
+  async getBrand(tenantCode: string): Promise<{
+    name: string;
+    brandName: string | null;
+    logoUrl: string | null;
+    themeColor: string | null;
+    copyright: string | null;
+  }> {
+    const tenant = await this.prisma.client.tenant.findUnique({ where: { code: tenantCode } });
+    if (!tenant) throw new UnauthorizedException('租户不存在');
+    return {
+      name: tenant.name,
+      brandName: tenant.brandName,
+      logoUrl: tenant.logoUrl,
+      themeColor: tenant.themeColor,
+      copyright: tenant.copyright,
+    };
+  }
+
   /** 聚合权限码与超管标志。 */
   private async resolveAuth(tenantCode: string, userId: string): Promise<PermissionSet> {
     const roleRows = await this.prisma.client.userRole.findMany({

src/tenants/dto.ts

@@ -33,6 +33,26 @@ export class CreateTenantDto {
   @IsOptional()
   @IsString()
   remark?: string;
+
+  @ApiPropertyOptional({ description: '品牌名' })
+  @IsOptional()
+  @IsString()
+  brandName?: string;
+
+  @ApiPropertyOptional({ description: 'Logo 地址' })
+  @IsOptional()
+  @IsString()
+  logoUrl?: string;
+
+  @ApiPropertyOptional({ description: '主色（如 #2E7FA3）' })
+  @IsOptional()
+  @IsString()
+  themeColor?: string;
+
+  @ApiPropertyOptional({ description: '版权文案' })
+  @IsOptional()
+  @IsString()
+  copyright?: string;
 }
 
 export class UpdateTenantDto {
@@ -50,6 +70,26 @@ export class UpdateTenantDto {
   @IsOptional()
   @IsString()
   remark?: string;
+
+  @ApiPropertyOptional({ description: '品牌名' })
+  @IsOptional()
+  @IsString()
+  brandName?: string;
+
+  @ApiPropertyOptional({ description: 'Logo 地址' })
+  @IsOptional()
+  @IsString()
+  logoUrl?: string;
+
+  @ApiPropertyOptional({ description: '主色（如 #2E7FA3）' })
+  @IsOptional()
+  @IsString()
+  themeColor?: string;
+
+  @ApiPropertyOptional({ description: '版权文案' })
+  @IsOptional()
+  @IsString()
+  copyright?: string;
 }
 
 export class ListTenantQuery extends PageQuery {

src/tenants/tenants.service.ts

@@ -30,6 +30,10 @@ export class TenantsService extends BaseCrudService {
           name: dto.name,
           status: dto.status ?? 'enabled',
           remark: dto.remark,
+          brandName: dto.brandName,
+          logoUrl: dto.logoUrl,
+          themeColor: dto.themeColor,
+          copyright: dto.copyright,
           createdBy: ctx?.userId ?? null,
         },
       });