fix: insufficient quota message (#758)

This pull request includes a change to improve the error message
displayed when there is insufficient quota in the `AgentLoop` class. The
updated message provides more detailed information and a link for
managing or purchasing credits.

Error message improvement:

*
[`codex-cli/src/utils/agent/agent-loop.ts`](diffhunk://#diff-b15957eac2720c3f1f55aa32f172cdd0ac6969caf4e7be87983df747a9f97083L1140-R1140):
Updated the error message in the `AgentLoop` class to include the
specific error message (if available) and a link to manage or purchase
credits.


Fixes #751

codex-cli/src/utils/agent/agent-loop.ts

@@ -1137,7 +1137,7 @@ export class AgentLoop {
                 content: [
                   {
                     type: "input_text",
-                    text: "⚠️ Insufficient quota. Please check your billing details and retry.",
+                    text: `\u26a0 Insufficient quota: ${err instanceof Error && err.message ? err.message.trim() : "No remaining quota."} Manage or purchase credits at https://platform.openai.com/account/billing.`,
                   },
                 ],
               });