feat(text-editor): add inputLetterSpacing and inputShadows to TextEditorStyle (#788)

Instead of hard-coding letterSpacing: 0 and shadows: [] in the text
input copyWith, move these values into TextEditorStyle as configurable
properties with the same defaults:

- inputLetterSpacing (default: 0) — fixes font alignment issues
- inputShadows (default: []) — prevents unwanted shadow rendering

This preserves the existing behavior by default while allowing users
to override these values (e.g. set to null) when they need the font's
native letter spacing or shadows.

Both hintStyle and style in TextEditorInput now read from these
style properties.

Author: faizahmaddae

lib/core/models/styles/text_editor_style.dart

@@ -75,6 +75,8 @@ class TextEditorStyle {
       Radius.circular(4),
     ),
     this.inputTextFieldPadding = EdgeInsets.zero,
+    this.inputLetterSpacing = 0,
+    this.inputShadows = const [],
   });
 
   /// Background color of the app bar in the text editor.
@@ -129,6 +131,18 @@ class TextEditorStyle {
   /// on various platforms. Set to null to use the default line height.
   final double? textHeight;
 
+  /// Letter spacing applied to the text input field style.
+  ///
+  /// Defaults to `0` to fix alignment issues with some fonts.
+  /// Set to `null` to use the font's default letter spacing.
+  final double? inputLetterSpacing;
+
+  /// Shadows applied to the text input field style.
+  ///
+  /// Defaults to an empty list to prevent unwanted shadow rendering
+  /// with some fonts. Set to `null` to use the font's default shadows.
+  final List<Shadow>? inputShadows;
+
   /// Controls how extra leading from the [TextStyle.height] multiplier is
   /// distributed above and below the text glyph.
   ///
@@ -166,6 +180,8 @@ class TextEditorStyle {
     EdgeInsets? textFieldMargin,
     EdgeInsets? textFieldPadding,
     TextStyle? fontSizeBottomSheetTitle,
+    double? inputLetterSpacing,
+    List<Shadow>? inputShadows,
   }) {
     return TextEditorStyle(
       textHeight: textHeight ?? this.textHeight,
@@ -192,6 +208,8 @@ class TextEditorStyle {
       textFieldPadding: textFieldPadding ?? this.textFieldPadding,
       fontSizeBottomSheetTitle:
           fontSizeBottomSheetTitle ?? this.fontSizeBottomSheetTitle,
+      inputLetterSpacing: inputLetterSpacing ?? this.inputLetterSpacing,
+      inputShadows: inputShadows ?? this.inputShadows,
     );
   }
 }

lib/features/text_editor/widgets/text_editor_input.dart

@@ -200,15 +200,16 @@ class _TextEditorInputState extends State<TextEditorInput> {
             hintStyle: widget.selectedTextStyle.copyWith(
               color: widget.configs.style.inputHintColor,
               fontSize: widget.textFontSize,
-              shadows: [],
+              letterSpacing: widget.configs.style.inputLetterSpacing,
+              shadows: widget.configs.style.inputShadows,
             ),
             backgroundColor: widget.backgroundColor,
             style: widget.selectedTextStyle.copyWith(
               color: widget.textColor,
               fontSize: widget.textFontSize,
-              letterSpacing: 0,
+              letterSpacing: widget.configs.style.inputLetterSpacing,
+              shadows: widget.configs.style.inputShadows,
               decoration: TextDecoration.none,
-              shadows: [],
             ),
 
             /// If we edit an layer we focus to the textfield after the