Use Aircoookie/ESPAsyncWebServer v2.4.2 instead of softhack007 fork

- Upgrade to newer ESPAsyncWebServer that has deferResponse() and queue features
- Remove deferResponse() wrapper function from fcn_declare.h
- Remove AsyncWebServer constructor conditional from wled.h
- Revert json.cpp, set.cpp, wled_server.cpp to use native deferResponse()

This addresses @willmmiles feedback to use the proper library instead of workarounds.

Author: karan-vk

wled00/fcn_declare.h

@@ -553,17 +553,6 @@ void serveJsonError(AsyncWebServerRequest* request, uint16_t code, uint16_t erro
 void serveSettings(AsyncWebServerRequest* request, bool post = false);
 void serveSettingsJS(AsyncWebServerRequest* request);
 
-// ESP32-C6 compatibility: deferResponse not available in patched ESPAsyncWebServer fork
-// Use this inline function which falls back to sending a 503 error
-inline void deferResponse(AsyncWebServerRequest* request) {
-#if defined(CONFIG_IDF_TARGET_ESP32C6)
-  // deferResponse not available, send 503 Service Unavailable instead
-  request->send(503, F("text/plain"), F("Server busy, try again"));
-#else
-  request->deferResponse();
-#endif
-}
-
 //ws.cpp
 void handleWs();
 void wsEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len);

wled00/json.cpp

@@ -1135,7 +1135,7 @@ void serveJson(AsyncWebServerRequest* request)
   }
 
   if (!requestJSONBufferLock(17)) {
-    deferResponse(request);
+    request->deferResponse();    
     return;
   }
   // releaseJSONBufferLock() will be called when "response" is destroyed (from AsyncWebServer)

wled00/set.cpp

@@ -655,7 +655,7 @@ void handleSettingsSet(AsyncWebServerRequest *request, byte subPage)
   if (subPage == SUBPAGE_UM)
   {
     if (!requestJSONBufferLock(5)) {
-      deferResponse(request);
+      request->deferResponse();
       return;
     }
 

wled00/wled.h

@@ -921,12 +921,7 @@ WLED_GLOBAL bool ledStatusState _INIT(false); // the current LED state
 #endif
 
 // server library objects
-#if defined(CONFIG_IDF_TARGET_ESP32C6)
-// ESP32-C6 uses patched ESPAsyncWebServer fork with simpler constructor
-WLED_GLOBAL AsyncWebServer server _INIT_N(((80)));
-#else
 WLED_GLOBAL AsyncWebServer server _INIT_N(((80, {0, WLED_REQUEST_MAX_QUEUE, WLED_REQUEST_MIN_HEAP, WLED_REQUEST_HEAP_USAGE})));
-#endif
 #ifdef WLED_ENABLE_WEBSOCKETS
 WLED_GLOBAL AsyncWebSocket ws _INIT_N((("/ws")));
 #endif

wled00/wled_server.cpp

@@ -393,7 +393,7 @@ void initServer()
     bool isConfig = false;
 
     if (!requestJSONBufferLock(14)) {
-      deferResponse(request);
+      request->deferResponse();
       return;
     }