refactor(onboard): unify auth-choice catalog for CLI help

src/commands/auth-choice-options.e2e.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, it } from "vitest";
 import type { AuthProfileStore } from "../agents/auth-profiles.js";
-import { buildAuthChoiceOptions } from "./auth-choice-options.js";
+import { buildAuthChoiceOptions, formatAuthChoiceChoicesForCli } from "./auth-choice-options.js";
 
 describe("buildAuthChoiceOptions", () => {
   it("includes GitHub Copilot", () => {
@@ -144,4 +144,32 @@ describe("buildAuthChoiceOptions", () => {
 
     expect(options.some((opt) => opt.value === "vllm")).toBe(true);
   });
+
+  it("builds cli help choices from the same catalog", () => {
+    const store: AuthProfileStore = { version: 1, profiles: {} };
+    const options = buildAuthChoiceOptions({
+      store,
+      includeSkip: true,
+    });
+    const cliChoices = formatAuthChoiceChoicesForCli({
+      includeLegacyAliases: false,
+      includeSkip: true,
+    }).split("|");
+
+    for (const option of options) {
+      expect(cliChoices).toContain(option.value);
+    }
+  });
+
+  it("can include legacy aliases in cli help choices", () => {
+    const cliChoices = formatAuthChoiceChoicesForCli({
+      includeLegacyAliases: true,
+      includeSkip: true,
+    }).split("|");
+
+    expect(cliChoices).toContain("setup-token");
+    expect(cliChoices).toContain("oauth");
+    expect(cliChoices).toContain("claude-cli");
+    expect(cliChoices).toContain("codex-cli");
+  });
 });