feat: update to v1.7.3 with smart asset detection and auto-install

update-server/api/latest.php

@@ -0,0 +1,14 @@
+<?php
+header('Content-Type: application/json');
+header('Access-Control-Allow-Origin: *');
+
+$version = [
+    "version" => "1.7.3",
+    "build_number" => "173",
+    "is_prerelease" => false,
+    "download_url" => "http://localhost:8000/downloads/umbrix-1.7.3-linux.deb",
+    "release_notes" => "🚀 Новые функции:\n- Улучшена стабильность\n- Исправлены ошибки\n- Single instance работает идеально",
+    "published_at" => "2026-01-18T07:00:00Z"
+];
+
+echo json_encode($version, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);