fix: global document and phone handling — remove Brazil-specific formatting

Frontend (jobs/new):
- Replace isValidCNPJ (checksum algorithm) with isValidDocument: accepts
  any tax document with 5–30 alphanumeric chars (CNPJ, EIN, VAT, etc.)
- Add cleanPhone(): strips formatting chars (dashes, spaces, parens) and
  keeps only digits + optional leading '+'; replaces cleanDigits+prepend
- Phone sent as '+5511999998888' if user typed '+55...', or '11999998888'
  if no country code was provided — no '+' blindly prepended anymore
- Company document sent stripped of all non-alphanumeric before API call
- Update label placeholder from '00.000.000/0000-00' to 'CNPJ, EIN, VAT...'
- Rename error key invalidCnpj → invalidDocument in all 3 locales (pt, en, es)

Backend (create_company use case):
- Add SanitizePhone() to utils/sanitizer.go: strips all non-digit chars
  except a leading '+'; '(11) 99999-8888' → '11999998888'
- Apply SanitizePhone to input.Phone before persisting to DB

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/internal/core/usecases/tenant/create_company.go

@@ -71,7 +71,10 @@ func (uc *CreateCompanyUseCase) Execute(ctx context.Context, input dto.CreateCom
 
 	// Map optional fields
 	if input.Phone != "" {
-		company.Phone = &input.Phone
+		clean := utils.SanitizePhone(input.Phone)
+		if clean != "" {
+			company.Phone = &clean
+		}
 	}
 	if input.Website != nil {
 		company.Website = input.Website

backend/internal/utils/sanitizer.go

@@ -87,3 +87,25 @@ func StripHTML(input string) string {
 	reg := regexp.MustCompile(`<[^>]*>`)
 	return reg.ReplaceAllString(input, "")
 }
+
+// SanitizePhone cleans a phone number, keeping only digits and an optional
+// leading '+' (international dialing prefix). Removes all formatting characters
+// such as spaces, dashes, parentheses, and dots.
+//
+// Examples:
+//
+//	"+55 (11) 99999-8888" → "+5511999998888"
+//	"(11) 99999-8888"     → "11999998888"
+//	"+1-800-555-0100"     → "+18005550100"
+func SanitizePhone(phone string) string {
+	phone = strings.TrimSpace(phone)
+	if phone == "" {
+		return ""
+	}
+	hasPlus := strings.HasPrefix(phone, "+")
+	digitsOnly := regexp.MustCompile(`\D`).ReplaceAllString(phone, "")
+	if hasPlus {
+		return "+" + digitsOnly
+	}
+	return digitsOnly
+}

frontend/src/app/jobs/new/page.tsx

@@ -39,25 +39,21 @@ type ApiCountry = {
 
 const cleanDigits = (value: string) => value.replace(/\D/g, "");
 
-const isValidCNPJ = (value: string) => {
+// Keeps only digits and a leading '+'. Strips all other formatting.
-  const cnpj = cleanDigits(value);
+// "+55 (11) 99999-8888" → "+5511999998888"
-  if (!cnpj) return true;
+// "(11) 99999-8888"     → "11999998888"
-  if (cnpj.length !== 14) return false;
+const cleanPhone = (value: string): string => {
-  if (/^(\d)\1+$/.test(cnpj)) return false;
+  const v = value.trim();
+  if (!v) return "";
+  const hasPlus = v.startsWith("+");
+  const digits = v.replace(/\D/g, "");
+  return hasPlus ? `+${digits}` : digits;
+};
 
-  const calcCheckDigit = (base: string, weights: number[]) => {
+// Accepts any tax document with 5–30 alphanumeric characters (global).
-    const sum = base
+const isValidDocument = (value: string): boolean => {
-      .split("")
+  const clean = value.replace(/[^a-zA-Z0-9]/g, "");
-      .reduce((acc, current, index) => acc + Number(current) * weights[index], 0);
+  return clean.length >= 5 && clean.length <= 30;
-    const mod = sum % 11;
-    return mod < 2 ? 0 : 11 - mod;
-  };
-
-  const base12 = cnpj.slice(0, 12);
-  const digit1 = calcCheckDigit(base12, [5, 4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2]);
-  const digit2 = calcCheckDigit(`${base12}${digit1}`, [6, 5, 4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2]);
-
-  return cnpj === `${base12}${digit1}${digit2}`;
 };
 
 const isHttpsUrl = (value: string) => /^https:\/\/.+/i.test(value);
@@ -125,8 +121,8 @@ const contentByLocale = {
       employeeCount: "Número de empregados",
       foundedYear: "Ano de fundação",
       foundedYearPlaceholder: "Ex: 2012",
-      cnpj: "CNPJ",
+      cnpj: "Documento fiscal",
-      cnpjPlaceholder: "00.000.000/0000-00",
+      cnpjPlaceholder: "CNPJ, EIN, VAT...",
       companyDescription: "Descrição da empresa",
       companyDescPlaceholder: "Convide os candidatos a conhecer a organização...",
       applicationChannel: "Como receber candidaturas",
@@ -232,7 +228,7 @@ const contentByLocale = {
       invalidPhone: "Informe um telefone com DDI válido. Exemplo: +55 11999998888",
       salaryFixedRequired: "Informe o salário fixo.",
       salaryRangeRequired: "Informe a faixa salarial (mínimo e máximo).",
-      invalidCnpj: "CNPJ da empresa inválido.",
+      invalidDocument: "Documento da empresa inválido (mínimo 5 caracteres).",
       billingRequired: "Preencha documento, país, endereço e e-mail de faturamento.",
       billingEmailInvalid: "Informe um e-mail de faturamento válido.",
       termsRequired: "Você precisa aceitar as condições legais para continuar.",
@@ -289,8 +285,8 @@ const contentByLocale = {
       employeeCount: "Number of employees",
       foundedYear: "Founded year",
       foundedYearPlaceholder: "e.g. 2012",
-      cnpj: "Tax ID",
+      cnpj: "Tax document",
-      cnpjPlaceholder: "00.000.000/0000-00",
+      cnpjPlaceholder: "CNPJ, EIN, VAT...",
       companyDescription: "Company description",
       companyDescPlaceholder: "Invite candidates to learn about the organization...",
       applicationChannel: "How to receive applications",
@@ -396,7 +392,7 @@ const contentByLocale = {
       invalidPhone: "Please enter a valid phone with country code. Example: +1 5551234567",
       salaryFixedRequired: "Please enter the fixed salary.",
       salaryRangeRequired: "Please enter the salary range (min and max).",
-      invalidCnpj: "Invalid company tax ID.",
+      invalidDocument: "Invalid company tax document (minimum 5 characters).",
       billingRequired: "Please fill in document, country, address and billing email.",
       billingEmailInvalid: "Please enter a valid billing email.",
       termsRequired: "You must accept the legal terms to continue.",
@@ -453,8 +449,8 @@ const contentByLocale = {
       employeeCount: "Número de empleados",
       foundedYear: "Año de fundación",
       foundedYearPlaceholder: "Ej: 2012",
-      cnpj: "ID Fiscal",
+      cnpj: "Documento fiscal",
-      cnpjPlaceholder: "00.000.000/0000-00",
+      cnpjPlaceholder: "CNPJ, EIN, VAT...",
       companyDescription: "Descripción de la empresa",
       companyDescPlaceholder: "Invite a los candidatos a conocer la organización...",
       applicationChannel: "Cómo recibir candidaturas",
@@ -560,7 +556,7 @@ const contentByLocale = {
       invalidPhone: "Ingrese un teléfono con código de país válido. Ejemplo: +34 612345678",
       salaryFixedRequired: "Ingrese el salario fijo.",
       salaryRangeRequired: "Ingrese el rango salarial (mínimo y máximo).",
-      invalidCnpj: "ID fiscal de la empresa inválido.",
+      invalidDocument: "Documento fiscal de la empresa inválido (mínimo 5 caracteres).",
       billingRequired: "Complete documento, país, dirección y email de facturación.",
       billingEmailInvalid: "Ingrese un email de facturación válido.",
       termsRequired: "Debe aceptar las condiciones legales para continuar.",
@@ -739,8 +735,8 @@ export default function PostJobPage() {
       toast.error(c.errors.salaryRangeRequired);
       return false;
     }
-    if (company.document && !isValidCNPJ(company.document)) {
+    if (company.document && !isValidDocument(company.document)) {
-      toast.error(c.errors.invalidCnpj);
+      toast.error(c.errors.invalidDocument);
       return false;
     }
     return true;
@@ -796,7 +792,7 @@ export default function PostJobPage() {
     setLoading(true);
     try {
       const apiBase = process.env.NEXT_PUBLIC_API_URL || "";
-      const billingPhone = cleanDigits(billing.contactMobile || billing.contactPhone || job.applicationPhone);
+      const billingPhone = cleanPhone(billing.contactMobile || billing.contactPhone || job.applicationPhone || "");
       const contactFullName = [billing.contactName, billing.contactLastName].filter(Boolean).join(" ");
 
       const registerRes = await fetch(`${apiBase}/api/v1/auth/register/company`, {
@@ -806,9 +802,9 @@ export default function PostJobPage() {
           companyName: company.name,
           email: billing.contactEmail,
           contact: contactFullName || null,
-          document: cleanDigits(company.document) || null,
+          document: company.document.replace(/[^a-zA-Z0-9]/g, "") || null,
           password: billing.password,
-          phone: billingPhone ? `+${billingPhone}` : null,
+          phone: billingPhone || null,
           website: company.website || null,
           employeeCount: company.employeeCount || null,
           foundedYear: company.foundedYear ? Number(company.foundedYear) : null,