simplified code across the app and consolidated duplicated helpers

lib/view/pages/talk/widgets/bubble.dart

@@ -2,35 +2,14 @@ import 'package:flutter/material.dart';
 
 enum BubbleNip { leftTop, rightBottom, none }
 
-class BubbleEdges {
-  const BubbleEdges.only({
-    this.top = 0,
-    this.bottom = 0,
-    this.left = 0,
-    this.right = 0,
-  });
-  const BubbleEdges.all(double value)
-    : top = value,
-      bottom = value,
-      left = value,
-      right = value;
-
-  final double top;
-  final double bottom;
-  final double left;
-  final double right;
-
-  EdgeInsets toEdgeInsets() => EdgeInsets.fromLTRB(left, top, right, bottom);
-}
-
 class BubbleStyle {
   const BubbleStyle({
     this.color,
     this.borderWidth = 0,
     this.borderColor,
     this.elevation = 0,
-    this.margin = const BubbleEdges.only(),
-    this.padding = const BubbleEdges.all(8),
+    this.margin = EdgeInsets.zero,
+    this.padding = const EdgeInsets.all(8),
     this.alignment = Alignment.centerLeft,
     this.nip = BubbleNip.none,
     this.borderRadius = 12,
@@ -40,23 +19,24 @@ class BubbleStyle {
   final double borderWidth;
   final Color? borderColor;
   final double elevation;
-  final BubbleEdges margin;
-  final BubbleEdges padding;
+  final EdgeInsets margin;
+  final EdgeInsets padding;
   final Alignment alignment;
   final BubbleNip nip;
   final double borderRadius;
 
-  BubbleStyle copyWith({double? borderWidth, Color? borderColor}) => BubbleStyle(
-    color: color,
-    borderWidth: borderWidth ?? this.borderWidth,
-    borderColor: borderColor ?? this.borderColor,
-    elevation: elevation,
-    margin: margin,
-    padding: padding,
-    alignment: alignment,
-    nip: nip,
-    borderRadius: borderRadius,
-  );
+  BubbleStyle copyWith({double? borderWidth, Color? borderColor}) =>
+      BubbleStyle(
+        color: color,
+        borderWidth: borderWidth ?? this.borderWidth,
+        borderColor: borderColor ?? this.borderColor,
+        elevation: elevation,
+        margin: margin,
+        padding: padding,
+        alignment: alignment,
+        nip: nip,
+        borderRadius: borderRadius,
+      );
 }
 
 /// The "nip" is faked by flattening one corner so the bubble anchors to
@@ -96,7 +76,7 @@ class Bubble extends StatelessWidget {
     return Align(
       alignment: style.alignment,
       child: Container(
-        margin: style.margin.toEdgeInsets(),
+        margin: style.margin,
         decoration: BoxDecoration(
           color: style.color,
           borderRadius: radius,
@@ -116,7 +96,7 @@ class Bubble extends StatelessWidget {
                 ]
               : null,
         ),
-        padding: style.padding.toEdgeInsets(),
+        padding: style.padding,
         child: child,
       ),
     );