feat: add application entry point with config, database, and logger initialization

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/index.ts

@@ -0,0 +1,36 @@
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { loadConfig, saveConfig } from "./data/config.js";
+import { createDatabase } from "./data/database.js";
+import { createLogger } from "./logger.js";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const ROOT_DIR = path.resolve(__dirname, "..");
+const DATA_DIR = path.join(ROOT_DIR, "data");
+const CONFIG_PATH = path.join(ROOT_DIR, "config.json");
+const DB_PATH = path.join(DATA_DIR, "tsmusicbot.db");
+const LOG_DIR = path.join(DATA_DIR, "logs");
+
+async function main() {
+  const config = loadConfig(CONFIG_PATH);
+  saveConfig(CONFIG_PATH, config);
+
+  const logger = createLogger(LOG_DIR);
+  const db = createDatabase(DB_PATH);
+
+  logger.info({ webPort: config.webPort }, "TSMusicBot started");
+
+  const shutdown = () => {
+    logger.info("Shutting down...");
+    db.close();
+    process.exit(0);
+  };
+
+  process.on("SIGINT", shutdown);
+  process.on("SIGTERM", shutdown);
+}
+
+main().catch((err) => {
+  console.error("Fatal error:", err);
+  process.exit(1);
+});