refactor(LLM CLI): 明確化 CLI 參數與驗證輸出

app/llm.js

@@ -23,7 +23,7 @@ function buildPrompt(systemPrompt, userContent) {
   ].join('\n');
 }
 
-function cliArgs(provider, model, promptFile = null, prompt = null) {
+function cliArgs({ provider, model, promptFile = null, prompt = null }) {
   if (provider === 'codex') {
     return ['exec', '--model', model, '--sandbox', 'read-only', '--skip-git-repo-check', '-'];
   }
@@ -53,7 +53,7 @@ async function runAssistantCLI({ provider, command, model }, prompt) {
     promptFile = join(tempDir, 'prompt.md');
     await writeFile(promptFile, prompt);
   }
-  const args = cliArgs(provider, model, promptFile, prompt);
+  const args = cliArgs({ provider, model, promptFile, prompt });
   const maxBuffer = Number(process.env.AI_ASSISTANT_MAX_BUFFER || 20 * 1024 * 1024);
   const timeout = Number(process.env.AI_ASSISTANT_TIMEOUT_MS || 15 * 60 * 1000);
   try {