[fix](trx-frontend-http): add missing context app_data in test_toggle_ft8_decode

The toggle_ft8_decode handler requires FrontendRuntimeContext for
multi-rig state resolution, but the test did not register it.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-client/trx-frontend/trx-frontend-http/src/api/mod.rs

@@ -1037,6 +1037,7 @@ mod tests {
             App::new()
                 .app_data(web::Data::new(state_rx))
                 .app_data(web::Data::new(rig_tx))
+                .app_data(web::Data::new(make_context()))
                 .service(decoder::toggle_ft8_decode),
         )
         .await;