types: Abstract inline interfaces to @plunk/types

apps/api/src/services/BillingLimitService.ts

@@ -1,4 +1,5 @@
 import {EmailSourceType} from '@plunk/db';
+import type {CategoryUsage, BillingLimitsResponse, LimitCheckResult} from '@plunk/types';
 import {BillingLimitExceededEmail, BillingLimitWarningEmail, sendPlatformEmail} from '@plunk/email';
 import React from 'react';
 import signale from 'signale';
@@ -11,39 +12,6 @@ import {Keys} from './keys.js';
 import {MembershipService} from './MembershipService.js';
 import {NtfyService} from './NtfyService.js';
 
-/**
- * Usage information for a specific email category
- */
-export interface CategoryUsage {
-  limit: number | null; // null = unlimited
-  usage: number;
-  percentage: number; // 0-100
-  isWarning: boolean; // true if >= 80%
-  isBlocked: boolean; // true if >= 100%
-}
-
-/**
- * Complete billing limits and usage for a project
- */
-export interface BillingLimitsResponse {
-  workflows: CategoryUsage;
-  campaigns: CategoryUsage;
-  transactional: CategoryUsage;
-  currency: string | null;
-}
-
-/**
- * Result of limit check
- */
-export interface LimitCheckResult {
-  allowed: boolean;
-  warning: boolean; // true if >= 80% but < 100%
-  usage: number;
-  limit: number | null;
-  percentage: number;
-  message?: string;
-}
-
 /**
  * Billing Limit Service
  * Handles usage tracking and enforcement of billing limits per email category