fix(tts): sox combination order; refactor input logic flow

- Replace manual `process.stdin` listeners with `events.once()`
- Switch from `process.exit()` to `return` for cleaner async execution paths
- Update Node.js module imports to use default exports consistently

index.ts

@@ -1,5 +1,5 @@
 #!/usr/bin/env node
-import { parseArgs } from "node:util";
+import util from "node:util";
 import { createOpenAICompatible } from "@ai-sdk/openai-compatible";
 import { streamText } from "ai";
 
@@ -7,7 +7,7 @@ import { initConfig, loadConfig } from "./src/config";
 import { Conversation } from "./src/conversation";
 import Renderer from "./src/render";
 
-const { values: args, positionals } = parseArgs({
+const { values: args, positionals } = util.parseArgs({
   args: process.argv.slice(2),
   options: {
     model: { type: "string" },