feat: HA scene control via voice

- ha.php: GET scenes action returns live scene list from HA; POST scene_activate triggers by entity_id
- chat.php: ha_scene intent fetches all scenes live, fuzzy token-matches against message, calls scene.turn_on; falls back to listing available scenes if no match
- KB intents: 14 patterns covering good night/morning/goodbye/kitchen lights/ocean dawn/porch + generic activate/run/trigger/set scene

Scenes available: Good Night, Good Morning, Good Morning Work, Goodbye, Kitchen Lights On/Off, Front Porch Lights, Office Ocean Dawn, Master Bedroom

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

api/endpoints/ha.php

@@ -38,6 +38,34 @@ if (!$configured) {
     exit;
 }
 
+// Scene list
+if ($method === 'GET' && $action === 'scenes') {
+    $states = haRequest('/states') ?? [];
+    $scenes = [];
+    foreach ($states as $s) {
+        if (str_starts_with($s['entity_id'] ?? '', 'scene.')) {
+            $scenes[] = [
+                'entity_id' => $s['entity_id'],
+                'name'      => $s['attributes']['friendly_name'] ?? $s['entity_id'],
+            ];
+        }
+    }
+    echo json_encode(['scenes' => $scenes]);
+    exit;
+}
+
+// Scene activate
+if ($method === 'POST' && $action === 'scene_activate') {
+    $entity_id = $data['entity_id'] ?? '';
+    if ($entity_id && str_starts_with($entity_id, 'scene.')) {
+        $result = haRequest('/services/scene/turn_on', 'POST', ['entity_id' => $entity_id]);
+        echo json_encode(['success' => true, 'entity_id' => $entity_id]);
+    } else {
+        echo json_encode(['error' => 'Invalid scene entity_id']);
+    }
+    exit;
+}
+
 // Live service call (toggle device) — always direct to HA, never cached
 if ($method === 'POST' && $action === 'service') {
     $domain    = $data['domain']    ?? '';