feat(onboard): add custom/local API configuration flow (#11106)

* feat(onboard): add custom/local API configuration flow

* ci: retry macos check

* fix: expand custom API onboarding (#11106) (thanks @MackDing)

* fix: refine custom endpoint detection (#11106) (thanks @MackDing)

* fix: streamline custom endpoint onboarding (#11106) (thanks @MackDing)

* fix: skip model picker for custom endpoint (#11106) (thanks @MackDing)

* fix: avoid allowlist picker for custom endpoint (#11106) (thanks @MackDing)

* Onboard: reuse shared fetch timeout helper (#11106) (thanks @MackDing)

* Onboard: clarify default base URL name (#11106) (thanks @MackDing)

---------

Co-authored-by: OpenClaw Contributor <contributor@openclaw.ai>
Co-authored-by: Gustavo Madeira Santana <gumadeiras@gmail.com>

docs/start/onboarding-overview.md

@@ -0,0 +1,51 @@
+---
+summary: "Overview of OpenClaw onboarding options and flows"
+read_when:
+  - Choosing an onboarding path
+  - Setting up a new environment
+title: "Onboarding Overview"
+sidebarTitle: "Onboarding Overview"
+---
+
+# Onboarding Overview
+
+OpenClaw supports multiple onboarding paths depending on where the Gateway runs
+and how you prefer to configure providers.
+
+## Choose your onboarding path
+
+- **CLI wizard** for macOS, Linux, and Windows (via WSL2).
+- **macOS app** for a guided first run on Apple silicon or Intel Macs.
+
+## CLI onboarding wizard
+
+Run the wizard in a terminal:
+
+```bash
+openclaw onboard
+```
+
+Use the CLI wizard when you want full control of the Gateway, workspace,
+channels, and skills. Docs:
+
+- [Onboarding Wizard (CLI)](/start/wizard)
+- [`openclaw onboard` command](/cli/onboard)
+
+## macOS app onboarding
+
+Use the OpenClaw app when you want a fully guided setup on macOS. Docs:
+
+- [Onboarding (macOS App)](/start/onboarding)
+
+## Custom API Endpoint
+
+If you need an endpoint that is not listed, including hosted providers that
+expose standard OpenAI or Anthropic APIs, choose **Custom API Endpoint** in the
+CLI wizard. You will be asked to:
+
+- Pick OpenAI-compatible, Anthropic-compatible, or **Unknown** (auto-detect).
+- Enter a base URL and API key (if required by the provider).
+- Provide a model ID and optional alias.
+- Choose an Endpoint ID so multiple custom endpoints can coexist.
+
+For detailed steps, follow the CLI onboarding docs above.