feat(macos): load provider catalog during AI onboarding (#101132)

* feat(macos): load onboarding providers from gateway

* test(crestodian): widen setup config mock

* fix(crestodian): satisfy onboarding lint gate

* chore(macos): refresh onboarding localization inventory

* test(plugins): cover guided Copilot secret metadata

extensions/opencode/openclaw.plugin.json

@@ -196,6 +196,7 @@
       "provider": "opencode",
       "method": "api-key",
       "choiceId": "opencode-zen",
+      "appGuidedSecret": true,
       "choiceLabel": "OpenCode Zen catalog",
       "groupId": "opencode",
       "groupLabel": "OpenCode",