feat: Add support for OpenAI-Organization and OpenAI-Project headers (#626)

Added support for OpenAI-Organization and OpenAI-Project headers for
OpenAI API calls.

This is for #74

codex-cli/src/components/singlepass-cli-app.tsx

@@ -5,7 +5,13 @@ import type { FileOperation } from "../utils/singlepass/file_ops";
 
 import Spinner from "./vendor/ink-spinner"; // Third‑party / vendor components
 import TextInput from "./vendor/ink-text-input";
-import { OPENAI_TIMEOUT_MS, getBaseUrl, getApiKey } from "../utils/config";
+import {
+  OPENAI_TIMEOUT_MS,
+  OPENAI_ORGANIZATION,
+  OPENAI_PROJECT,
+  getBaseUrl,
+  getApiKey,
+} from "../utils/config";
 import {
   generateDiffSummary,
   generateEditSummary,
@@ -393,10 +399,19 @@ export function SinglePassApp({
         files,
       });
 
+      const headers: Record<string, string> = {};
+      if (OPENAI_ORGANIZATION) {
+        headers["OpenAI-Organization"] = OPENAI_ORGANIZATION;
+      }
+      if (OPENAI_PROJECT) {
+        headers["OpenAI-Project"] = OPENAI_PROJECT;
+      }
+
       const openai = new OpenAI({
         apiKey: getApiKey(config.provider),
         baseURL: getBaseUrl(config.provider),
         timeout: OPENAI_TIMEOUT_MS,
+        defaultHeaders: headers,
       });
       const chatResp = await openai.beta.chat.completions.parse({
         model: config.model,