feat: add minimal chart to display API data with hardcoded parameters

server/frontend/public/assets/js/chart.js

@@ -0,0 +1,32 @@
+function renderChart(points) {
+  const canvas = document.getElementById("consumption-chart");
+
+  const labels = points.map(p => formatPeriod(p.period));
+  const data = points.map(p => p.delta_m3);
+
+  new Chart(canvas, {
+    type: "bar",
+    data: {
+      labels,
+      datasets: [
+        {
+          label: "Consommation (m³)",
+          data
+        },
+      ],
+    },
+    options: {
+      responsive: true,
+      scales: {
+        y: {
+          beginAtZero: true,
+        },
+      },
+    },
+  });
+}
+
+function formatPeriod(isoString) {
+  const date = new Date(isoString);
+  return date.toLocaleDateString("fr-FR", { day: "2-digit", month: "short" });
+}