- Replace ESP8266WebServer/WebServer with ESPAsyncWebServer
- Update all route handlers to async pattern with AsyncWebServerRequest*
- Replace synchronous HTTPSend() with request->send()
- Add configurable delay constants (REBOOT_DELAY_MS, EXIT_DELAY_MS, ERASE_REBOOT_DELAY_MS)
- Implement scheduled reboot/abort flags instead of blocking delays
- Update WiFiManagerRequestArgs to use AsyncWebServerRequest
- Remove server->handleClient() and server->stop() calls (not needed for AsyncWebServer)
- Update parameter access to use request->getParam() instead of server->arg()
- Add ESPAsyncWebServer to platformio.ini dependencies
- Created WiFiManagerRequestArgs nested class to encapsulate HTTP request arguments
- Updated setSaveParamsCallback to accept WiFiManagerRequestArgs by value
- Updated handleWifiSave() and handleParamSave() to build RequestArgs early
- Updated doParamSave() to accept and use RequestArgs for custom HTML params
- Updated test callbacks to match new signature
- All tests passing (43/43)
- Move library code from src/ to lib/WiFiManager/src/
- Move headers from include/ to lib/WiFiManager/include/
- Move library.json to lib/WiFiManager/
- Update platformio.ini with Unity test framework configuration
- Add test structure following PlatformIO unit testing best practices
- Remove empty src/ directory (not needed for library-only projects)
alex