fix: Add diagnostic check for nil chat entries

main.go

@@ -55,6 +55,17 @@ func main() {
 
 	if argv.Add != "" {
 		me.chats.AddFile(argv.Add)
+
+		// --- Start Diagnostic Check ---
+		// This loop will check for nil entries in the slice before marshaling.
+		for i, chat := range me.chats.GetChats() {
+			if chat == nil {
+				log.Fatalf("Found a nil *Chat pointer at index %d before calling ConfigSave(). This is the cause of the panic.", i)
+			}
+		}
+		log.Info("Sanity check passed: No nil entries found in the Chats slice.")
+		// --- End Diagnostic Check ---
+
 		me.chats.ConfigSave()
 		okExit("")
 	}