Multi-Domain-Asset-Infrastruktur: geteilte Vite-Konfiguration und DomainAssetContext

- vite.shared.js als gemeinsame Quelle fuer Ports, Hot-Files, HMR-Hosts
  und CORS-Origins der beiden Vite-Builds (Portal/Web)
- App\Support\DomainAssetContext kapselt die Vite-Build-Directory-
  Konfiguration pro Domain (ThemeServiceProvider + Auth-Layout nutzen ihn)
- Tailwind-Portal-Content-Globs auf die tatsaechliche View-Struktur gezogen
- Dev-Beispiel-Routen + Tests (DomainAssetContextTest, DevExampleRoutesTest)
- Aufraeumen: versehentliche Leerdatei dev:web entfernt

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tailwind.portal.config.js

@@ -10,10 +10,18 @@ const defaultTheme = require("tailwindcss/defaultTheme");
 /** @type {import('tailwindcss').Config} */
 module.exports = {
     content: [
-        "./resources/views/portal/**/*.blade.php",
-        "./resources/views/layouts/portal/**/*.blade.php",
-        "./resources/views/components/**/*.blade.php",
-        "./app/Livewire/Portal/**/*.php",
+        "./resources/views/livewire/admin/**/*.blade.php",
+        "./resources/views/livewire/customer/**/*.blade.php",
+        "./resources/views/livewire/components/**/*.blade.php",
+        "./resources/views/livewire/settings/**/*.blade.php",
+        "./resources/views/livewire/auth/**/*.blade.php",
+        "./resources/views/layouts/**/*.blade.php",
+        "./resources/views/components/layouts/**/*.blade.php",
+        "./resources/views/components/portal/**/*.blade.php",
+        "./resources/views/components/settings/**/*.blade.php",
+        "./resources/views/partials/**/*.blade.php",
+        "./resources/views/admin/**/*.blade.php",
+        "./app/Livewire/**/*.php",
         "./vendor/laravel/framework/src/Illuminate/Pagination/resources/views/*.blade.php",
         "./vendor/livewire/flux-pro/stubs/**/*.blade.php",
         "./vendor/livewire/flux/stubs/**/*.blade.php",