```

refactor Student type definitions to deprecate obsolete fields, standardize structure, and update billing address format
```

002_source/cms/src/db/Students/type.d.ts

@@ -1,17 +1,71 @@
+// src/db/Students/type.d.ts
 //
-// RULES
+// PURPOSE
 // type for student record
+//
+// RULES: sorting direction for user meta lists
+import type { BillingAddress } from '../billingAddress/type';
 
 // Student type definitions
-export interface Student {
-  id: string;
+
+export interface DBStudentOld {
+  //
   name: string;
-  avatar: string;
+  //
+  // NOTE: obslete "avatar" and use "avatar_file"
+  avatar?: string;
+  avatar_file?: string;
+  //
   email: string;
   phone: string;
   quota: number;
-  status: 'active' | 'blocked' | 'pending';
+  company: string;
+  //
+  // billingAddress: BillingAddress[] | [];
+  expand: { billingAddress?: BillingAddress[] };
+
+  // status is obsoleted, replace by state
+  status: 'pending' | 'active' | 'blocked';
+  state: 'pending' | 'active' | 'blocked';
+  //
+  timezone: string;
+  language: string;
+  currency: string;
+  //
+  id: string;
+  created: string;
+  updated?: string;
+  collectionId: string;
+}
+
+// RULES: core user meta data structure
+export interface Student {
+  id: string;
+  name: string;
+  //
+  // NOTE: obslete "avatar" and use "avatar_file"
+  avatar?: string;
+  avatar_file?: string;
+  //
+  email: string;
+  phone?: string;
+  quota: number;
+  company?: string;
+  //
+  billingAddress: BillingAddress | Record<string, never>;
+
+  // status is obsoleted, replace by state
+  status: 'pending' | 'active' | 'blocked';
+  state: 'pending' | 'active' | 'blocked';
+  //
+  timezone: string;
+  language: string;
+  currency: string;
+  //
+  id: string;
   createdAt: Date;
+  updatedAt?: Date;
+  collectionId: string;
 }
 
 export interface UpdateStudent {
@@ -36,6 +90,7 @@ export interface UpdateStudent {
   timezone?: string;
   language?: string;
   currency?: string;
+
   //
   taxId?: string;
 }