Add matrix background and prepare filters

frontend/templates/search_results.html

@@ -1,5 +1,10 @@
 {% extends 'base.html' %}
 
+{% block matrix %}
+<canvas id="matrix"></canvas>
+<script src="{{ url_for('static', filename='js/matrix.js') }}"></script>
+{% endblock %}
+
 {% block content %}
 <h2>Résultats pour "{{ query }}"</h2>
 <table id="results-table">