chore: Enable "curly" rule to avoid single-statement if confusion/errors.

src/line/rich-menu.ts

@@ -42,7 +42,9 @@ function resolveToken(
   explicit: string | undefined,
   params: { accountId: string; channelAccessToken: string },
 ): string {
-  if (explicit?.trim()) return explicit.trim();
+  if (explicit?.trim()) {
+    return explicit.trim();
+  }
   if (!params.channelAccessToken) {
     throw new Error(
       `LINE channel access token missing for account "${params.accountId}" (set channels.line.channelAccessToken or LINE_CHANNEL_ACCESS_TOKEN).`,