Add global site settings view composer with database fallback

Implemented view composer in AppServiceProvider to share site settings across all views:
- Loads site name, logo, colors (primary/secondary/accent), and description from Setting model
- Falls back to config/defaults if database unavailable (prevents errors during migrations)
- Made siteSettings available to all Blade templates

Updated layouts and components to use dynamic settings:
- app.blade.php and guest.blade.php now use siteSettings for

src/resources/views/layouts/guest.blade.php

@@ -5,12 +5,21 @@
         <meta name="viewport" content="width=device-width, initial-scale=1">
         <meta name="csrf-token" content="{{ csrf_token() }}">
 
-        <title>{{ config('app.name', 'Laravel') }}</title>
+        <title>{{ $siteSettings['name'] ?? config('app.name', 'Laravel') }}</title>
 
         <!-- Fonts -->
         <link rel="preconnect" href="https://fonts.bunny.net">
         <link href="https://fonts.bunny.net/css?family=figtree:400,500,600&display=swap" rel="stylesheet" />
 
+        <!-- Dynamic Colors from Settings -->
+        <style>
+            :root {
+                --primary-color: {{ $siteSettings['primary_color'] ?? '#3b82f6' }};
+                --secondary-color: {{ $siteSettings['secondary_color'] ?? '#8b5cf6' }};
+                --accent-color: {{ $siteSettings['accent_color'] ?? '#10b981' }};
+            }
+        </style>
+
         <!-- Scripts -->
         @vite(['resources/css/app.css', 'resources/js/app.js'])
     </head>