fix: dropdown Administration et raccourcis tableau de bord admin

- Ajout de `relative` sur le conteneur du menu Administration +
  `top-full left-0` sur le dropdown (position correcte sous le bouton)
- Grille de raccourcis dans le tableau de bord admin : Utilisateurs,
  Sections, Types de sources, Types de lieux

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

resources/views/admin/dashboard.blade.php

@@ -109,6 +109,24 @@
         </div>
         @endif
 
+        {{-- Raccourcis admin --}}
+        <div class="grid grid-cols-2 sm:grid-cols-4 gap-3">
+            @foreach([
+                ['label' => 'Utilisateurs',    'route' => 'admin.utilisateurs.index', 'icon' => 'M17 20h5v-2a3 3 0 00-5.356-1.857M17 20H7m10 0v-2c0-.656-.126-1.283-.356-1.857M7 20H2v-2a3 3 0 015.356-1.857M7 20v-2c0-.656.126-1.283.356-1.857m0 0a5.002 5.002 0 019.288 0M15 7a3 3 0 11-6 0 3 3 0 016 0z'],
+                ['label' => 'Sections',        'route' => 'admin.sections.index',     'icon' => 'M19 21V5a2 2 0 00-2-2H7a2 2 0 00-2 2v16m14 0h2m-2 0h-5m-9 0H3m2 0h5M9 7h1m-1 4h1m4-4h1m-1 4h1m-2 10v-5a1 1 0 00-1-1h-2a1 1 0 00-1 1v5m4 0H9'],
+                ['label' => 'Types de sources','route' => 'admin.source-types.index','icon' => 'M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2'],
+                ['label' => 'Types de lieux', 'route' => 'admin.lieu-types.index',   'icon' => 'M17.657 16.657L13.414 20.9a1.998 1.998 0 01-2.827 0l-4.244-4.243a8 8 0 1111.314 0z'],
+            ] as $link)
+                <a href="{{ route($link['route']) }}"
+                   class="flex items-center gap-3 px-4 py-3 bg-white border border-gray-200 rounded-xl hover:border-indigo-300 hover:shadow-sm transition-all text-sm text-gray-700 font-medium">
+                    <svg class="w-5 h-5 text-gray-400 shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="{{ $link['icon'] }}"/>
+                    </svg>
+                    {{ $link['label'] }}
+                </a>
+            @endforeach
+        </div>
+
         <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
 
             {{-- Sources à valider --}}