fix(models): tighten audio capability + correct openai oauth content

src/models/openai.ts

@@ -96,9 +96,10 @@ export class OpenAIClient implements ModelClient {
       .map((m) => {
         const text = getMessageTextWithTools(m);
         if (!text) {return null;}
+        const contentType = m.role === 'assistant' ? 'output_text' : 'input_text';
         return {
           role: m.role,
-          content: [{ type: 'input_text', text }],
+          content: [{ type: contentType, text }],
         };
       })
       .filter((x): x is NonNullable<typeof x> => Boolean(x));