fix(auth): align Codex OAuth persistence paths (#37517)

* fix(desktop): codex OAuth onboarding now resolves on fresh install

The desktop codex device-code worker persisted tokens with a hand-rolled
pool.add_entry(), writing only credential_pool.openai-codex. It never set
active_provider, so on a fresh install the onboarding setup.runtime_check
resolved provider "auto", couldn't detect the Codex OAuth session, and raised
"No inference provider configured" — while setup.status (which sniffs the pool)
reported configured. The disagreement surfaced as the onboarding banner
"Connected, but Hermes still cannot resolve a usable provider."

Use the canonical _save_codex_tokens() instead, matching the CLI's
`hermes auth add openai-codex` path and the Nous/MiniMax dashboard workers.
It writes the providers.openai-codex singleton (setting active_provider) and
syncs the pool.

* fix(auth): align Codex OAuth persistence paths

Ensure desktop and CLI Codex OAuth logins both write the canonical provider state so fresh installs resolve a usable runtime provider.

---------

Co-authored-by: teknium1 <127238744+teknium1@users.noreply.github.com>

hermes_cli/auth.py

@@ -3370,7 +3370,7 @@ def _sync_codex_pool_entries(
         entry["last_error_reset_at"] = None
 
 
-def _save_codex_tokens(tokens: Dict[str, str], last_refresh: str = None) -> None:
+def _save_codex_tokens(tokens: Dict[str, str], last_refresh: str = None, label: str = None) -> None:
     """Save Codex OAuth tokens to Hermes auth store (~/.hermes/auth.json)."""
     if last_refresh is None:
         last_refresh = datetime.now(timezone.utc).isoformat().replace("+00:00", "Z")
@@ -3380,6 +3380,8 @@ def _save_codex_tokens(tokens: Dict[str, str], last_refresh: str = None) -> None
         state["tokens"] = tokens
         state["last_refresh"] = last_refresh
         state["auth_mode"] = "chatgpt"
+        if label and str(label).strip():
+            state["label"] = str(label).strip()
         _save_provider_state(auth_store, "openai-codex", state)
         _sync_codex_pool_entries(auth_store, tokens, last_refresh)
         _save_auth_store(auth_store)