Fix analyze issues, optimize code

lib/src/widgets/editor.dart

@@ -42,8 +42,6 @@ abstract class EditorState extends State<RawEditor>
 
   String get pastePlainText;
 
-  bool get liveTextInputEnabled => false;
-
   /// Controls the floating cursor animation when it is released.
   /// The floating cursor is animated to merge with the regular cursor.
   AnimationController get floatingCursorResetController;

lib/src/widgets/raw_editor.dart

@@ -1747,6 +1747,10 @@ class RawEditorState extends EditorState
       }
     }
   }
+
+  @override
+  // TODO: implement liveTextInputEnabled
+  bool get liveTextInputEnabled => false;
 }
 
 class _Editor extends MultiChildRenderObjectWidget {

lib/src/widgets/toolbar.dart

@@ -574,7 +574,7 @@ class QuillToolbar extends StatelessWidget implements PreferredSizeWidget {
           if (showDividers)
             QuillDivider(axis,
                 color: sectionDividerColor, space: sectionDividerSpace),
-        for (var customButton in customButtons)
+        for (final customButton in customButtons)
           if (customButton.child != null) ...[
             InkWell(
               onTap: customButton.onTap,

lib/src/widgets/toolbar/quill_font_family_button.dart

@@ -67,6 +67,7 @@ class QuillFontFamilyButton extends StatefulWidget {
 class _QuillFontFamilyButtonState extends State<QuillFontFamilyButton> {
   late String _defaultDisplayText;
   late String _currentValue;
+
   Style get _selectionStyle => widget.controller.getSelectionStyle();
 
   @override
@@ -164,7 +165,8 @@ class _QuillFontFamilyButtonState extends State<QuillFontFamilyButton> {
       context: context,
       elevation: 4,
       items: [
-        for (MapEntry<String, String> fontFamily in widget.rawItemsMap.entries)
+        for (final MapEntry<String, String> fontFamily
+            in widget.rawItemsMap.entries)
           PopupMenuItem<String>(
             key: ValueKey(fontFamily.key),
             value: fontFamily.value,

lib/src/widgets/toolbar/quill_font_size_button.dart

@@ -151,7 +151,8 @@ class _QuillFontSizeButtonState extends State<QuillFontSizeButton> {
       context: context,
       elevation: 4,
       items: [
-        for (MapEntry<String, String> fontSize in widget.rawItemsMap.entries)
+        for (final MapEntry<String, String> fontSize
+            in widget.rawItemsMap.entries)
           PopupMenuItem<String>(
             key: ValueKey(fontSize.key),
             value: fontSize.value,