Add auto-generated account numbers and member numbers

6-digit random numbers generated on create, unique per company. Member
number column added to member table. Both displayed in UI tables.

packages/backend/src/services/account.service.ts

@@ -26,12 +26,35 @@ import {
   paginatedResponse,
 } from '../utils/pagination.js'
 
+async function generateUniqueNumber(
+  db: PostgresJsDatabase,
+  table: typeof accounts | typeof members,
+  column: typeof accounts.accountNumber | typeof members.memberNumber,
+  companyId: string,
+  companyIdColumn: typeof accounts.companyId,
+): Promise<string> {
+  for (let attempt = 0; attempt < 10; attempt++) {
+    const num = String(Math.floor(100000 + Math.random() * 900000))
+    const [existing] = await db
+      .select({ id: table.id })
+      .from(table)
+      .where(and(eq(companyIdColumn, companyId), eq(column, num)))
+      .limit(1)
+    if (!existing) return num
+  }
+  // Fallback to 8 digits if 6-digit space is crowded
+  return String(Math.floor(10000000 + Math.random() * 90000000))
+}
+
 export const AccountService = {
   async create(db: PostgresJsDatabase, companyId: string, input: AccountCreateInput) {
+    const accountNumber = await generateUniqueNumber(db, accounts, accounts.accountNumber, companyId, accounts.companyId)
+
     const [account] = await db
       .insert(accounts)
       .values({
         companyId,
+        accountNumber,
         name: input.name,
         email: input.email,
         phone: input.phone,
@@ -137,11 +160,13 @@ export const MemberService = {
   ) {
     // isMinor: explicit flag wins, else derive from DOB, else false
     const minor = input.isMinor ?? (input.dateOfBirth ? isMinor(input.dateOfBirth) : false)
+    const memberNumber = await generateUniqueNumber(db, members, members.memberNumber, companyId, members.companyId)
 
     const [member] = await db
       .insert(members)
       .values({
         companyId,
+        memberNumber,
         accountId: input.accountId,
         firstName: input.firstName,
         lastName: input.lastName,