test(commands): assert CommandName is set on TestBuildApplyRenderOptions

CommandName is read by engine.Render to format the FailIfMultiNodes
error wording. The engine-side assertion (TestRenderFailIfMultiNodes_UsesCommandName)
verifies Render does the right thing with whatever value it receives, but
nothing was pinning that buildApplyRenderOptions sets it to "talm apply"
in the first place. A future refactor that drops the field would slip
through unnoticed.

Assisted-By: Claude <noreply@anthropic.com>
Signed-off-by: Aleksei Sviridkin <f@lex.la>

Author: lexfrei

pkg/commands/apply_test.go

@@ -54,6 +54,9 @@ func TestBuildApplyRenderOptions(t *testing.T) {
 	if len(opts.TemplateFiles) != 1 || opts.TemplateFiles[0] != "templates/controlplane.yaml" {
 		t.Errorf("expected TemplateFiles=[templates/controlplane.yaml], got %v", opts.TemplateFiles)
 	}
+	if opts.CommandName != "talm apply" {
+		t.Errorf("expected CommandName=%q, got %q (engine.Render uses this for FailIfMultiNodes error wording)", "talm apply", opts.CommandName)
+	}
 }
 
 func TestBuildApplyPatchOptions(t *testing.T) {