chore: harden logger TZ, ffmpeg lifecycle and fix package metadata

- Logger.Timestamp now formats via Intl with timeZone Asia/Seoul, so
  the timestamp is correct regardless of the container/host TZ. The
  previous setHours(+9) hack assumed the system clock was UTC.
- Transcode.mp3BufferToPcmStream now attaches error/stderr handlers
  to the ffmpeg child process and its streams, swallows EPIPE on
  early downstream close, and force-kills on spawn error so failed
  conversions can't leak processes. Log level bumped from 'quiet'
  to 'error' so real ffmpeg errors surface.
- package.json homepage/bugs/repository pointed at github.com/tkrmagid/bot.ts
  which doesn't reflect this repo. Repoint to the actual Gitea origin.

src/utils/Logger.ts

@@ -1,9 +1,23 @@
 import colors from "colors/safe";
 
+// 컨테이너/호스트의 TZ 설정과 무관하게 항상 KST(Asia/Seoul) 기준으로
+// 'YY-MM-DD HH:MM:SS' 형식의 타임스탬프를 만든다. 기존 구현은
+// setHours(+9)로 수동 보정해 서버 TZ가 UTC가 아닐 때 시간이 어긋났다.
+const KST_FORMATTER = new Intl.DateTimeFormat("en-CA", {
+  timeZone: "Asia/Seoul",
+  year: "2-digit",
+  month: "2-digit",
+  day: "2-digit",
+  hour: "2-digit",
+  minute: "2-digit",
+  second: "2-digit",
+  hour12: false,
+});
+
 export const Timestamp = () => {
-  const Now = new Date();
-  Now.setHours(Now.getHours() + 9);
-  return Now.toISOString().replace('T', ' ').substring(0, 19).slice(2);
+  const parts = KST_FORMATTER.formatToParts(new Date());
+  const get = (type: string) => parts.find(p => p.type === type)?.value ?? "00";
+  return `${get("year")}-${get("month")}-${get("day")} ${get("hour")}:${get("minute")}:${get("second")}`;
 }
 
 type logType = "log" | "info" | "warn" | "error" | "debug" | "ready" | "slash";

src/utils/Transcode.ts

@@ -2,12 +2,13 @@ import ffmpegPath from "ffmpeg-static";
 import { ChildProcessWithoutNullStreams, spawn } from "node:child_process";
 import { Readable } from "node:stream";
 import { AudioResource, createAudioResource, StreamType } from "@discordjs/voice";
+import { Logger } from "./Logger";
 
 /** MP3 Buffer -> PCM(s16le 48k 2ch) Readable stream */
 function mp3BufferToPcmStream(mp3Buf: Buffer): Readable {
   if (!ffmpegPath) throw new Error("ffmpeg-static 경로 확인 실패");
   const ff: ChildProcessWithoutNullStreams = spawn(ffmpegPath, [
-    "-loglevel","quiet","-hide_banner",
+    "-loglevel","error","-hide_banner",
     "-i","pipe:0",     // stdin으로 mp3
     "-f","s16le",      // raw PCM
     "-ar","48000",     // 48k
@@ -15,14 +16,20 @@ function mp3BufferToPcmStream(mp3Buf: Buffer): Readable {
     "pipe:1"           // stdout으로 PCM
   ], { stdio: ["pipe","pipe","pipe"] });
 
-  // 입력 밀어넣고 닫기
-  // ff.stdin.write(mp3Buf);
-  // ff.stdin.end();
+  // ffmpeg가 비정상 종료해도 부모가 죽지 않도록 모든 핸들에 에러 핸들러를 단다.
+  // stdin EPIPE, stdout 소비 실패 등을 조용히 흘려 보내고 자식 프로세스를
+  // 강제 종료해 leak을 막는다.
+  const killFf = () => { try { ff.kill("SIGKILL"); } catch {} };
+  ff.on("error", (e) => { Logger.error("ffmpeg spawn error: "+String(e)); killFf(); });
+  ff.stderr.on("data", (chunk: Buffer) => {
+    const msg = chunk.toString().trim();
+    if (msg) Logger.warn("[ffmpeg] "+msg);
+  });
+  ff.stdin.on("error", () => { /* EPIPE on early close */ });
+  ff.stdout.on("error", () => { /* downstream gone */ });
 
-  Readable.from(mp3Buf).pipe(ff.stdin);
+  Readable.from(mp3Buf).pipe(ff.stdin).on("error", () => {});
 
-  // ffmpeg stdout(PCM)을 그대로 리턴
-  // (에러 로그가 필요하면 ff.stderr 'data' 핸들링 추가)
   return ff.stdout;
 }