fix : Différentes erreurs

lib/ui/common/ReadMoreText.dart

@@ -5,13 +5,12 @@ import 'package:flutter/material.dart';
 class ReadMoreText extends StatefulWidget {
   const ReadMoreText(
       this.text, {
-        Key? key,
+        super.key,
         this.trimLines = 2,
         this.collapsedText = '... read more',
         this.expandedText = ' read less',
         this.textStyle,
-      })  : assert(text != null),
-        super(key: key);
+      })  : assert(text != null);
 
   final String text;
   final int trimLines;
@@ -69,7 +68,7 @@ class ReadMoreTextState extends State<ReadMoreText> {
             textSize.height,
         ));
         endIndex = textPainter.getOffsetBefore(pos.offset);
-        var textSpan;
+        TextSpan textSpan;
         if (textPainter.didExceedMaxLines) {
           textSpan = TextSpan(
             text: _readMore