fix: 解决自动更新无限重启循环 + 终点站列车不显示在预测列表

1. CloudServer: publishStationUpdate 发布时同步 Gitea 最新脚本到本地副本
   - 新增 fetchGiteaScript() 一次下载全文
   - 发布更新时将 Gitea 脚本内容写入 stationScriptPath
   - 保证 targetVersion 与 /downloads/station_broadcast.lua 内容版本一致

2. 客户端 AutoUpdate.apply: 下载后校验版本一致性
   - 从下载内容正则提取 APP_VERSION_TEXT
   - 若 downloadedVersion ~= targetVersion 则中止更新，防止 reboot loop
   - 写入错误日志便于排查

3. 预测显示: 在站列车（尤其终点站）强制插入 upcomingTrains 列表头部
   - CRN 可能从 TrainStops 提前移除终点站列车
   - 使用 normalizeUpcomingKey 去重避免重复条目
   - 固定 ETA=0，确保 CURREN T TRAIN 对应列车能在 UPCOMING 中可见

版本号 v1.0.68 -> v1.0.69

CloudServer/server.js

@@ -259,11 +259,20 @@ function maybeSendStationUpdate(ws, stationName, stationVersion) {
     }
 }
 
-async function fetchGiteaVersion() {
+async function fetchGiteaScript() {
     try {
         const response = await fetch('https://gitea.fse-media.group/Henry_Du/CC-StationBroadcast/raw/branch/main/station_broadcast.lua');
         if (!response.ok) return null;
-        const text = await response.text();
+        return await response.text();
+    } catch (e) {
+        return null;
+    }
+}
+
+async function fetchGiteaVersion() {
+    try {
+        const text = await fetchGiteaScript();
+        if (!text) return null;
         const match = text.match(/local\s+APP_VERSION_TEXT\s*=\s*["']([^"']+)["']/);
         return match ? String(match[1]).trim() : null;
     } catch (e) {
@@ -272,10 +281,22 @@ async function fetchGiteaVersion() {
 }
 
 async function publishStationUpdate(req) {
-    let version = await fetchGiteaVersion();
+    let version = null;
+    let giteaText = await fetchGiteaScript();
+    if (giteaText) {
+        const match = giteaText.match(/local\s+APP_VERSION_TEXT\s*=\s*["']([^"']+)["']/);
+        version = match ? String(match[1]).trim() : null;
+    }
     if (!version) {
         version = getLocalStationScriptVersion() || `build-${Date.now()}`;
         log('WARN', `Failed to fetch Gitea version, falling back to local version: ${version}`);
+    } else if (giteaText) {
+        try {
+            fs.writeFileSync(stationScriptPath, giteaText, 'utf8');
+            log('INFO', `Synced station_broadcast.lua from Gitea to local (version ${version})`);
+        } catch (e) {
+            log('ERROR', `Failed to sync station_broadcast.lua to local: ${e.message}`);
+        }
     }
     
     const releaseId = String(Date.now());

station_broadcast.lua

@@ -2231,6 +2231,18 @@ function AutoUpdate.apply(info, reason)
         return false, err
     end
 
+    local downloadedVersion = nil
+    do
+        local m = string.match(body, 'local%s+APP_VERSION_TEXT%s*=%s*["\']([^"\']+)["\']')
+        if m then downloadedVersion = Utils.trim(m) end
+    end
+
+    if downloadedVersion and downloadedVersion ~= targetVersion then
+        State.updateInProgress = false
+        Utils.log("ERROR", "Downloaded version mismatch: target=" .. tostring(targetVersion) .. " got=" .. tostring(downloadedVersion) .. " - aborting update to prevent reboot loop")
+        return false, "downloaded version mismatch (" .. tostring(downloadedVersion) .. " ~= " .. tostring(targetVersion) .. ")"
+    end
+
     local ok, writeErr = AutoUpdate.writeFile(startupPath, body)
     if not ok then
         State.updateInProgress = false