5.4 (Teil 2): page-header in categories/* + companies/create,edit umgestellt

Vier weitere Standard-Header auf <x-portal.page-header> umgestellt:
categories/index, categories/edit (ID/PM/Unterkategorien-Badges via :meta),
companies/create, companies/edit (ID-Badge via :meta).

Bewusst NICHT umgestellt (Sonderfaelle, bleiben unveraendert):
- companies/index: abweichende Titelgroesse (text-[34px] statt 30px)
- companies/show: Sonder-Header mit Logo-Bild + Website-Link

Categories-/Companies-Tests (82) gruen.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

resources/views/livewire/admin/companies/create.blade.php

@@ -119,26 +119,18 @@ new #[Layout('components.layouts.app'), Title('Neue Firma')] class extends Compo
 
 <div class="space-y-8">
     {{-- ============== PAGE HEADER ============== --}}
-    <header class="page-header">
-        <div class="min-w-0">
-            <div class="flex items-center gap-3 mb-3 flex-nowrap whitespace-nowrap">
-                <span class="badge hub dot">{{ __('Admin Backend') }}</span>
-                <span class="eyebrow muted">{{ __('Stammdaten · Neue Firma') }}</span>
-            </div>
-            <h1 class="text-[30px] font-bold tracking-[-0.6px] leading-[1.15] m-0 text-[color:var(--color-ink)]">
-                {{ __('Neue Firma') }}
-            </h1>
-            <p class="text-[13px] leading-[1.55] mt-2 m-0 max-w-[640px] text-[color:var(--color-ink-2)]">
-                {{ __('Stammdaten, Adresse, Logo und Rechtsangaben einer neuen Firma erfassen.') }}
-            </p>
-        </div>
-
-        <div class="flex items-center gap-2 flex-shrink-0">
+    <x-portal.page-header
+        :badge="__('Admin Backend')"
+        :eyebrow="__('Stammdaten · Neue Firma')"
+        :title="__('Neue Firma')"
+        :description="__('Stammdaten, Adresse, Logo und Rechtsangaben einer neuen Firma erfassen.')"
+    >
+        <x-slot:actions>
             <flux:button variant="filled" icon="arrow-left" href="{{ route('admin.companies.index') }}" wire:navigate>
                 {{ __('Zurück') }}
             </flux:button>
-        </div>
-    </header>
+        </x-slot:actions>
+    </x-portal.page-header>
 
     <form wire:submit="save" class="space-y-6">
         <article class="panel">