fix: install updater alongside startup script

Download the update helper during install and expose it from the cloud server so new hosts can run manual updates immediately.

CloudServer/server.js

@@ -50,7 +50,9 @@ const audioStationDir = path.join(audioRootDir, 'station');
 const listFilePath = path.join(appRootDir, 'list.txt');
 const tempBroadcastDir = path.join(appRootDir, 'temp-broadcast');
 const stationScriptPath = path.join(appRootDir, 'station_broadcast.lua');
+const stationUpdateScriptPath = path.join(appRootDir, 'update_station_broadcast.lua');
 const STATION_SCRIPT_DOWNLOAD_PATH = '/downloads/station_broadcast.lua';
+const STATION_UPDATE_SCRIPT_DOWNLOAD_PATH = '/downloads/update_station_broadcast.lua';
 const STREAMABLE_AUDIO_EXTENSIONS = ['.wav', '.mp3', '.ogg', '.flac', '.m4a', '.aac', '.opus'];
 const MUSIC_AUDIO_EXTENSIONS = [...STREAMABLE_AUDIO_EXTENSIONS, '.dfpwm'];
 
@@ -2190,6 +2192,13 @@ app.get(STATION_SCRIPT_DOWNLOAD_PATH, (req, res) => {
     return res.sendFile(stationScriptPath);
 });
 
+app.get(STATION_UPDATE_SCRIPT_DOWNLOAD_PATH, (req, res) => {
+    if (!fs.existsSync(stationUpdateScriptPath)) {
+        return res.status(404).send('update_station_broadcast.lua not found');
+    }
+    return res.sendFile(stationUpdateScriptPath);
+});
+
 app.get('/api/streams', (req, res) => {
     const streams = [];
     const seen = new Set();