feat(FN-4629): complete Step 3 — add worktrunk help examples

Fusion-Task-Id: FN-4629
Fusion-Task-Lineage: b8775bc8-4c04-4259-8cad-f5a3ba0c42e4

packages/cli/src/__tests__/bin.test.ts

@@ -289,6 +289,13 @@ describe("bin command routing and fallbacks", () => {
     expect(logSpy).toHaveBeenCalledWith(expect.stringContaining("fn — AI-orchestrated task board"));
   });
 
+  it("includes worktrunk settings keys in help output", async () => {
+    await expect(runBin(["--help"])).rejects.toThrow("process.exit:0");
+    const output = logSpy.mock.calls.map((args) => args.join(" ")).join("\n");
+    expect(output).toContain("worktrunk.enabled");
+    expect(output).toContain("worktrunk.onFailure");
+  });
+
   it("launches dashboard when no args are provided", async () => {
     commandMocks.runDashboard.mockResolvedValue({ dispose: vi.fn() });
     await runBin([]);

packages/cli/src/bin.ts

@@ -327,6 +327,8 @@ Usage:
   fn settings set <key> <value>        Update a configuration setting
   fn settings set defaultNodeId <node-id>
   fn settings set unavailableNodePolicy <block|fallback-local>
+  fn settings set worktrunk.enabled <true|false>
+  fn settings set worktrunk.onFailure <fail|fallback-native>
   fn settings export [opts]              Export settings to a JSON file
   fn settings import <file> [opts]       Import settings from a JSON file