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_commands.py

@@ -307,28 +307,20 @@ def auth_add_command(args) -> None:
         return
 
     if provider == "openai-codex":
-        # Clear any existing suppression marker so a re-link after `hermes auth
-        # remove openai-codex` works without the new tokens being skipped.
-        auth_mod.unsuppress_credential_source(provider, "device_code")
         creds = auth_mod._codex_device_code_login()
         label = (getattr(args, "label", None) or "").strip() or label_from_token(
             creds["tokens"]["access_token"],
             _oauth_default_label(provider, len(pool.entries()) + 1),
         )
-        entry = PooledCredential(
-            provider=provider,
-            id=uuid.uuid4().hex[:6],
-            label=label,
-            auth_type=AUTH_TYPE_OAUTH,
-            priority=0,
-            source=f"{SOURCE_MANUAL}:device_code",
-            access_token=creds["tokens"]["access_token"],
-            refresh_token=creds["tokens"].get("refresh_token"),
-            base_url=creds.get("base_url"),
+        auth_mod._save_codex_tokens(
+            creds["tokens"],
             last_refresh=creds.get("last_refresh"),
+            label=label,
         )
-        pool.add_entry(entry)
-        print(f'Added {provider} OAuth credential #{len(pool.entries())}: "{entry.label}"')
+        pool = load_pool(provider)
+        entry = next((item for item in pool.entries() if item.source == "device_code"), None)
+        shown_label = entry.label if entry is not None else label
+        print(f'Saved {provider} OAuth device-code credentials: "{shown_label}"')
         return
 
     if provider == "xai-oauth":