diff --git a/frontend/templates/admin/settings.html b/frontend/templates/admin/settings.html
index 615d519..6162915 100644
--- a/frontend/templates/admin/settings.html
+++ b/frontend/templates/admin/settings.html
@@ -801,4 +801,40 @@ async function loadBrightnessConfig() {
     document.getElementById('toggle-auto-brightness').checked = auto;
     document.getElementById('auto-brightness-status').textContent = auto
       ? '✅ Auto-flash actif — le flash s\'adapte à l\'ambiance'
-      : '⏸ Auto-flash désactivé — lumi
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+      : '⏸ Auto-flash désactivé — luminosité fixe';
+  } catch(e) {
+    console.warn('brightness config:', e);
+  }
+}
+
+function previewBrightness(val) {
+  document.getElementById('brightness-val').textContent = val;
+}
+
+async function saveBrightness() {
+  const val = parseInt(document.getElementById('brightness-slider').value);
+  try {
+    await api('PUT', `/api/leds/brightness?value=${val}`);
+    showToast(`✅ Luminosité réglée à ${val}`, 'success');
+  } catch(e) {
+    showToast('Erreur : ' + e.message, 'error');
+  }
+}
+
+async function setAutoBrightness(enabled) {
+  try {
+    await api('PUT', `/api/leds/auto-brightness?enabled=${enabled}`);
+    document.getElementById('auto-brightness-status').textContent = enabled
+      ? '✅ Auto-flash actif — le flash s\'adapte à l\'ambiance'
+      : '⏸ Auto-flash désactivé — luminosité fixe';
+    showToast(enabled ? '✅ Auto-flash activé' : '⏸ Auto-flash désactivé', 'success');
+  } catch(e) {
+    showToast('Erreur : ' + e.message, 'error');
+    document.getElementById('toggle-auto-brightness').checked = !enabled;
+  }
+}
+
+// ── Init ──────────────────────────────────────────────────────────────────────
+loadBrightnessConfig();
+</script>
+{% endblock %}
\ No newline at end of file