fix(browser): set HttpResponse.connected in the emscripten HTTP login path

The __EMSCRIPTEN__ doRequest lambda filled status/body but never set
connected, so HttpResponse::operator bool() was always false and every
wasm HTTP login - even a successful 200 - fell into the error branch
and surfaced as 'Login Error: Unknown error'. Desktop paths already
return { true, ... }, which is why native login works.

src/framework/net/httplogin.cpp

@@ -324,6 +324,7 @@ void LoginHttp::httpLogin(const std::string& host, const std::string& path,
 
             HttpResponse response;
             if (fetch) {
+                response.connected = true;
                 response.status = static_cast<int>(fetch->status);
                 response.body.assign(fetch->data, fetch->numBytes);
                 emscripten_fetch_close(fetch);