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

app/Models/Subscriber.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace App\Models;
 
+use App\Services\PhoneNumberNormalizer;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
@@ -36,6 +37,52 @@ class Subscriber extends Model
         return $this->belongsTo(PreregistrationPage::class);
     }
 
+    /**
+     * @param  string|null  $value
+     */
+    public function setPhoneAttribute(mixed $value): void
+    {
+        if ($value === null) {
+            $this->attributes['phone'] = null;
+
+            return;
+        }
+
+        if (! is_string($value)) {
+            $this->attributes['phone'] = null;
+
+            return;
+        }
+
+        $trimmed = trim($value);
+        if ($trimmed === '') {
+            $this->attributes['phone'] = null;
+
+            return;
+        }
+
+        $normalized = app(PhoneNumberNormalizer::class)->normalizeToE164($trimmed);
+        $this->attributes['phone'] = $normalized;
+    }
+
+    /**
+     * Phones are stored as E.164 (e.g. +31612345678). Legacy rows may still be digits-only.
+     */
+    public function phoneDisplay(): ?string
+    {
+        $phone = $this->phone;
+        if ($phone === null || $phone === '') {
+            return null;
+        }
+
+        $p = (string) $phone;
+        if (str_starts_with($p, '+')) {
+            return $p;
+        }
+
+        return preg_match('/^\d{8,15}$/', $p) === 1 ? '+'.$p : $p;
+    }
+
     public function scopeSearch(Builder $query, ?string $term): Builder
     {
         if ($term === null || $term === '') {
@@ -47,7 +94,8 @@ class Subscriber extends Model
         return $query->where(function (Builder $q) use ($like): void {
             $q->where('first_name', 'like', $like)
                 ->orWhere('last_name', 'like', $like)
-                ->orWhere('email', 'like', $like);
+                ->orWhere('email', 'like', $like)
+                ->orWhere('phone', 'like', $like);
         });
     }
 }