fix(terminal): tolerate undefined path in formatDocsLink (#67076, #67074) (#67086)

formatDocsLink called path.trim() unconditionally. The typed contract
says 'docsPath: string' (required on ChannelMeta), but a handful of
channel plugins and catalog rows leave it unset at runtime, so
onboarding flows that call formatChannelSelectionLine(entry.meta, ...)
hit a TypeError on the first meta without a docsPath:

  TypeError: Cannot read properties of undefined (reading 'trim')

Symptom: 'openclaw onboard --install-daemon' and the 'Select channel
(QuickStart)' -> 'Skip for now' path both crash on 2026.4.12 and
2026.4.14.

Fix: widen formatDocsLink's path parameter to 'string | undefined |
null' and fall back to the docs root when path is missing. The single
call site that guards with 'if (params.docsPath)' stays fine; the
unguarded channel-selection path now degrades gracefully.

Fixes #67076
Fixes #67074

src/terminal/links.test.ts

@@ -0,0 +1,31 @@
+import { describe, expect, it } from "vitest";
+import { formatDocsLink } from "./links.js";
+
+describe("formatDocsLink", () => {
+  it("prepends the docs root when given a relative path", () => {
+    const out = formatDocsLink("/channels/telegram", "telegram");
+    expect(out).toContain("https://docs.openclaw.ai/channels/telegram");
+  });
+
+  it("preserves an absolute http url", () => {
+    const out = formatDocsLink("https://example.com/page", "page");
+    expect(out).toContain("https://example.com/page");
+  });
+
+  it("treats whitespace-only path like an empty path and falls back to docs root", () => {
+    const out = formatDocsLink("   ", "root");
+    expect(out).toContain("https://docs.openclaw.ai");
+  });
+
+  it("does not crash when path is undefined (regression: #67076, #67074)", () => {
+    expect(() =>
+      formatDocsLink(undefined as unknown as string, "label"),
+    ).not.toThrow();
+    const out = formatDocsLink(undefined as unknown as string, "label");
+    expect(out).toContain("https://docs.openclaw.ai");
+  });
+
+  it("does not crash when path is null", () => {
+    expect(() => formatDocsLink(null as unknown as string)).not.toThrow();
+  });
+});

src/terminal/links.ts

@@ -5,15 +5,21 @@ function resolveDocsRoot(): string {
 }
 
 export function formatDocsLink(
-  path: string,
+  path: string | undefined | null,
   label?: string,
   opts?: { fallback?: string; force?: boolean },
 ): string {
-  const trimmed = path.trim();
   const docsRoot = resolveDocsRoot();
-  const url = trimmed.startsWith("http")
-    ? trimmed
-    : `${docsRoot}${trimmed.startsWith("/") ? trimmed : `/${trimmed}`}`;
+  const trimmed = typeof path === "string" ? path.trim() : "";
+  // When a caller has no docsPath, link to the docs root rather than crashing
+  // the onboarding/channel-selection flows that pass meta.docsPath through
+  // here unguarded. The typed contract says docsPath is required, but a
+  // handful of channel plugins and catalog rows leave it unset at runtime.
+  const url = trimmed
+    ? trimmed.startsWith("http")
+      ? trimmed
+      : `${docsRoot}${trimmed.startsWith("/") ? trimmed : `/${trimmed}`}`
+    : docsRoot;
   return formatTerminalLink(label ?? url, url, {
     fallback: opts?.fallback ?? url,
     force: opts?.force,