feat: E.164 phone validation and storage with libphonenumber

- Add giggsey/libphonenumber-for-php, PhoneNumberNormalizer, ValidPhoneNumber rule

- Store subscribers as E.164; mutator normalizes on save; optional phone required from form block

- Migration to normalize legacy subscriber phones; Mailwizz/search/UI/tests updated

- Add run-deploy-from-local.sh and PREREGISTER_DEFAULT_PHONE_REGION in .env.example

Made-with: Cursor

resources/js/app.js

@@ -390,6 +390,7 @@ document.addEventListener('alpine:init', () => {
         phase: config.phase,
         startAtMs: config.startAtMs,
         phoneEnabled: config.phoneEnabled,
+        phoneRequired: config.phoneRequired === true,
         subscribeUrl: config.subscribeUrl,
         csrfToken: config.csrfToken,
         genericError: config.genericError,
@@ -499,10 +500,16 @@ document.addEventListener('alpine:init', () => {
                 ok = false;
             }
             if (this.phoneEnabled) {
-                const digits = String(this.phone).replace(/\D/g, '');
-                if (digits.length > 0 && (digits.length < 8 || digits.length > 15)) {
+                const trimmed = String(this.phone).trim();
+                if (this.phoneRequired && trimmed === '') {
                     this.fieldErrors.phone = [this.invalidPhoneMsg];
                     ok = false;
+                } else if (trimmed !== '') {
+                    const digits = trimmed.replace(/\D/g, '');
+                    if (digits.length < 8 || digits.length > 15) {
+                        this.fieldErrors.phone = [this.invalidPhoneMsg];
+                        ok = false;
+                    }
                 }
             }
             return ok;