feat: improve assessment creation and edition

templates/error.html

@@ -0,0 +1,20 @@
+{% extends "base.html" %}
+
+{% block title %}Erreur - Gestion Scolaire{% endblock %}
+
+{% block content %}
+<div class="max-w-md mx-auto mt-16">
+    <div class="bg-red-50 border border-red-200 rounded-lg p-6 text-center">
+        <div class="mx-auto flex items-center justify-center h-12 w-12 rounded-full bg-red-100 mb-4">
+            <svg class="h-6 w-6 text-red-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-2.5L13.732 4c-.77-.833-1.732-.833-2.5 0L4.268 18.5c-.77.833.192 2.5 1.732 2.5z"></path>
+            </svg>
+        </div>
+        <h1 class="text-lg font-medium text-gray-900 mb-2">Une erreur s'est produite</h1>
+        <p class="text-sm text-gray-600 mb-4">{{ error or "Une erreur inattendue s'est produite." }}</p>
+        <a href="{{ url_for('index') }}" class="inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500">
+            Retour à l'accueil
+        </a>
+    </div>
+</div>
+{% endblock %}