Initial commit — Serveur Lucas SmartEye

API réception alertes chute (SmartEye/YOLO), analyse IA (Gemini 2.5 Flash),
gestion alertes avec escalade (watchdog), notifications Firebase,
dashboard web, documentation MkDocs.

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

heartbeat.php

@@ -0,0 +1,59 @@
+<?php
+/**
+ * heartbeat.php — Heartbeat des Jetsons SmartEye
+ *
+ * Appelé toutes les 5 minutes par chaque Jetson déployé.
+ * Met à jour le statut du site et le timestamp du dernier contact.
+ *
+ * POST /heartbeat.php
+ * Content-Type: application/json
+ * {"client_id": "Demo_01", "token": "secret123", "uptime": 86400, "cameras_active": 3}
+ */
+header("Content-Type: application/json");
+header("Access-Control-Allow-Origin: *");
+
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+    http_response_code(405);
+    die(json_encode(["success" => false, "message" => "POST uniquement"]));
+}
+
+$input = json_decode(file_get_contents("php://input"), true);
+$client_id = $input['client_id'] ?? '';
+$token = $input['token'] ?? '';
+
+if (empty($client_id) || empty($token)) {
+    http_response_code(400);
+    die(json_encode(["success" => false, "message" => "client_id et token requis"]));
+}
+
+$DB_FILE = "database.json";
+$db = json_decode(file_get_contents($DB_FILE), true);
+
+// Authentification
+$found_key = null;
+foreach ($db['clients'] as $key => $c) {
+    if (strcasecmp($c['name'] ?? '', $client_id) === 0 && $c['token'] === $token) {
+        $found_key = $key;
+        break;
+    }
+}
+
+if ($found_key === null) {
+    http_response_code(403);
+    die(json_encode(["success" => false, "message" => "Authentification échouée"]));
+}
+
+// Mise à jour heartbeat
+$db['clients'][$found_key]['last_heartbeat'] = date("Y-m-d H:i:s");
+$db['clients'][$found_key]['site_status'] = "active";
+$db['clients'][$found_key]['uptime'] = $input['uptime'] ?? 0;
+$db['clients'][$found_key]['cameras_active'] = $input['cameras_active'] ?? 0;
+
+file_put_contents($DB_FILE, json_encode($db, JSON_PRETTY_PRINT));
+
+echo json_encode([
+    "success" => true,
+    "message" => "Heartbeat reçu",
+    "server_time" => date("Y-m-d H:i:s")
+]);
+?>