Fix strlcpy usage and improve Ethernet include handling

Corrects strlcpy usage in the client and server to avoid null pointer issues and ensures compatibility with Mbed platforms. Updates the viewer to conditionally include PortentaEthernet for specific boards, improving platform compatibility.

Author: dorkmo

TankAlarm-112025-Client-BluesOpta/TankAlarm-112025-Client-BluesOpta.ino

@@ -1342,8 +1342,9 @@ static void applyConfigUpdate(const JsonDocument &doc) {
         gConfig.tanks[i].enableServerUpload = t["upload"].as<bool>();
       }
       if (t.containsKey("relayTargetClient")) {
+        const char *relayTargetStr = t["relayTargetClient"].as<const char *>();
         strlcpy(gConfig.tanks[i].relayTargetClient, 
-                t["relayTargetClient"].as<const char *>() ?: "", 
+                relayTargetStr ? relayTargetStr : "", 
                 sizeof(gConfig.tanks[i].relayTargetClient));
       }
       if (t.containsKey("relayMask")) {
@@ -2325,7 +2326,7 @@ static void publishNote(const char *fileName, const JsonDocument &doc, bool sync
 
   J *body = JParse(buffer);
   if (!body) {
-    notecard.deleteResponse(req);
+    JDelete(req);
     bufferNoteForRetry(targetFile, buffer, syncNow);
     return;
   }

TankAlarm-112025-Server-BluesOpta/TankAlarm-112025-Server-BluesOpta.ino

@@ -343,9 +343,9 @@ static bool gLastLinkState = false;
 static double gLastDailyEmailSentEpoch = 0.0;
 #define MIN_DAILY_EMAIL_INTERVAL_SECONDS 3600  // Minimum 1 hour between daily emails
 
-#ifndef ARDUINO_TANKALARM_HAS_STRLCPY
-#define ARDUINO_TANKALARM_HAS_STRLCPY
-size_t strlcpy(char *dst, const char *src, size_t size) {
+// strlcpy is provided by Notecard library on Mbed platforms
+#if !defined(ARDUINO_ARCH_MBED) && !defined(strlcpy)
+static size_t strlcpy(char *dst, const char *src, size_t size) {
   if (!dst || !src || size == 0) {
     return 0;
   }

TankAlarm-112025-Viewer-BluesOpta/TankAlarm-112025-Viewer-BluesOpta.ino

@@ -17,7 +17,12 @@
 #include <Wire.h>
 #include <ArduinoJson.h>
 #include <Notecard.h>
-#include <Ethernet.h>
+#if defined(ARDUINO_OPTA) || defined(ARDUINO_PORTENTA_H7_M7) || defined(ARDUINO_PORTENTA_H7_M4)
+  #include <PortentaEthernet.h>
+  #include <Ethernet.h>
+#else
+  #include <Ethernet.h>
+#endif
 #include <math.h>
 #include <string.h>