Function js_fetch_success_callback

src/platforms/wasm/js_fetch.cpp.hpp:97–113

// C++ callback function that JavaScript can call when fetch completes
extern "C" EMSCRIPTEN_KEEPALIVE void js_fetch_success_callback(u32 request_id, const char* content) {
    FL_WARN("Fetch success callback received for request " << request_id << ", content length: " << strlen(content));
    
    auto callback_opt = getCallbackManager().takeCallback(request_id);
    if (callback_opt) {
        // Create a successful response object using unified fl::response
        fl::net::http::Response response(200, "OK");
        response.set_body(fl::string(content));
        response.set_header("content-type", "text/html"); // Default content type

        (*callback_opt)(response);
    } else {
        FL_WARN("Warning: No pending callback found for fetch success request " << request_id);
    }
    // Wake any pthread parked inside fl::platforms::await().
    fl::platforms::ICoroutineRuntime::instance().wakeWaiters();
}

// C++ error callback function that JavaScript can call when fetch fails
extern "C" EMSCRIPTEN_KEEPALIVE void js_fetch_error_callback(u32 request_id, const char* error_message) {