fix: парсить уровень лога sing-box из stderr вместо hardcode error

src/server/index.js

@@ -30,7 +30,18 @@ function pushLog(level, line) {
   }
 }
 
-function captureStream(stream, level) {
+// Sing-box пишет все логи в stderr, поэтому парсим уровень из содержимого строки
+const SINGBOX_LEVEL_RE = /\[\d+m(TRACE|DEBUG|INFO|WARN|ERROR|FATAL)\[0m/i;
+function parseSingboxLevel(line, fallback) {
+  const m = line.match(SINGBOX_LEVEL_RE);
+  if (!m) return fallback;
+  const l = m[1].toLowerCase();
+  if (l === "warn") return "warning";
+  if (l === "fatal") return "error";
+  return l; // trace, debug, info, error
+}
+
+function captureStream(stream, fallbackLevel) {
   let remainder = "";
   stream.setEncoding("utf8");
   stream.on("data", (chunk) => {
@@ -39,12 +50,14 @@ function captureStream(stream, level) {
     remainder = lines.pop() || "";
     for (const line of lines) {
       if (!line) continue;
+      const level = parseSingboxLevel(line, fallbackLevel);
       process.stdout.write(`[sing-box:${level}] ${line}\n`);
       pushLog(level, line);
     }
   });
   stream.on("end", () => {
     if (remainder) {
+      const level = parseSingboxLevel(remainder, fallbackLevel);
       process.stdout.write(`[sing-box:${level}] ${remainder}\n`);
       pushLog(level, remainder);
     }