feat(billing): cap each owner's stored file volume

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

apps/api/src/platform/platform.controller.ts

@@ -11,6 +11,7 @@ import {
 import { CurrentUser } from '../auth/current-user.decorator';
 import {
   ApplyBillingPlanDto,
+  SetStorageQuotaDto,
   CreatePlatformAdminDto,
   CreatePlatformOrganizationDto,
   ResetPlatformAdminPasswordDto,
@@ -122,6 +123,16 @@ export class PlatformController {
     return this.platform.applyBillingPlan(id, dto);
   }
 
+  @Get('users/:id/storage')
+  storageUsage(@Param('id') id: string, @Query('refresh') refresh?: string) {
+    return this.platform.storageUsage(id, refresh === '1' || refresh === 'true');
+  }
+
+  @Patch('users/:id/billing/storage')
+  setStorageQuota(@Param('id') id: string, @Body() dto: SetStorageQuotaDto) {
+    return this.platform.setStorageQuota(id, dto.quotaGb);
+  }
+
   @Patch('organizations/:id/modules')
   updateOrganizationModules(
     @Param('id') id: string,