all: apply golangci-lint 2.9.0 fixes

Fix issues found by the upgraded golangci-lint:
- wsl_v5: add required whitespace in CLI files
- staticcheck SA4006: replace new(var.Field) with &localVar
  pattern since staticcheck does not recognize Go 1.26
  new(value) as a use of the variable
- staticcheck SA5011: use t.Fatal instead of t.Error for
  nil guard checks so execution stops
- unused: remove dead ptrTo helper function

hscontrol/db/users_test.go

@@ -73,12 +73,14 @@ func TestDestroyUserErrors(t *testing.T) {
 				pak, err := db.CreatePreAuthKey(user.TypedID(), false, false, nil, nil)
 				require.NoError(t, err)
 
+				pakID := pak.ID
+
 				node := types.Node{
 					ID:             0,
 					Hostname:       "testnode",
 					UserID:         &user.ID,
 					RegisterMethod: util.RegisterMethodAuthKey,
-					AuthKeyID:      new(pak.ID),
+					AuthKeyID:      &pakID,
 				}
 				trx := db.DB.Save(&node)
 				require.NoError(t, trx.Error)