phase3: WEB BUILD SUCCEEDS. cross_file override (0.3.4+2, Dart3-safe), parabolic/popup _margin EdgeInsets, remaining nullable fixes. lib 12->6(util_io deferred), web build OK with --no-tree-shake-icons

lib/widgets/desktop/desktop_view_ticket.dart

@@ -406,7 +406,7 @@ class DesktopViewTicketState extends State<DesktopViewTicket> {
                     width: mainSpace / 2,
                     margin: EdgeInsets.only(top: 16.0, bottom: 16.0),
                     padding: EdgeInsets.all(10.0),
-                    child: (ticket.isClosed) ?
+                    child: (ticket.isClosed == true) ?
                     Column(
                       children: [
                         Container(

lib/widgets/general/add_remove_button.dart

@@ -320,7 +320,7 @@ class AddRemoveButtonState extends State<AddRemoveButton> {
             textColor: Colors.white
         );
       } else {
-        cartInfo.productList![widget.cartLineItemIndex].quantity += 1.0;
+        cartInfo.productList![widget.cartLineItemIndex].quantity = (cartInfo.productList![widget.cartLineItemIndex].quantity ?? 0) + 1.0;
         Utils.addSubproductQty(cartInfo, cartInfo.productList![widget.cartLineItemIndex]);
         store.dispatch(UpdateCartInfo(
             Utils.addCartInfoToCartInfoList(store.state.cartInfos, cartInfo)));
@@ -384,7 +384,7 @@ class AddRemoveButtonState extends State<AddRemoveButton> {
       cartInfo.productList!.removeAt(widget.cartLineItemIndex);
       Utils.removeSubproduct(cartInfo, uuid);
     } else {
-      cartInfo.productList![widget.cartLineItemIndex].quantity -= 1;
+      cartInfo.productList![widget.cartLineItemIndex].quantity = (cartInfo.productList![widget.cartLineItemIndex].quantity ?? 0) - 1;
       Utils.addSubproductQty(cartInfo, cartInfo.productList![widget.cartLineItemIndex], remove: true);
     }
     if (cartInfo.productList!.length <= 0) {

lib/widgets/general/parabolic_animation_widget.dart

@@ -69,13 +69,13 @@ class ParabolicAnimationWidget extends AnimatedWidget {
       RenderBox stackBox = stackKey.currentContext!.findRenderObject()! as RenderBox;
       Offset stackBoxOffset = stackBox.globalToLocal(Offset.zero);
 
-      EdgeInsets startMargin = _margin(startKey)!;
+      EdgeInsets startMargin = _margin(startKey);
       RenderBox startBox = startKey.currentContext!.findRenderObject()! as RenderBox;
       _startOffset = startBox.localToGlobal(Offset(
           startMargin.left + startAdjustOffset.dx,
           stackBoxOffset.dy + startMargin.top + startAdjustOffset.dy));
 
-      EdgeInsets endMargin = _margin(endKey)!;
+      EdgeInsets endMargin = _margin(endKey);
       RenderBox endBox = endKey.currentContext!.findRenderObject()! as RenderBox;
       _endOffset = endBox.localToGlobal(Offset(
           endMargin.left + endAdjustOffset.dx,
@@ -83,9 +83,9 @@ class ParabolicAnimationWidget extends AnimatedWidget {
     }
   }
 
-  EdgeInsetsGeometry _margin(GlobalKey key) {
+  EdgeInsets _margin(GlobalKey key) {
     final Widget widget = key.currentContext!.widget;
-    EdgeInsetsGeometry margin = (widget is Container) ? (widget.margin ?? EdgeInsets.zero) : EdgeInsets.zero;
-    return margin ?? EdgeInsets.zero;
+    final mg = (widget is Container) ? widget.margin : null;
+    return mg is EdgeInsets ? mg : EdgeInsets.zero;
   }
 }

lib/widgets/general/popup_animation_widget.dart

@@ -52,7 +52,7 @@ class PopupAnimationWidget extends AnimatedWidget {
       final RenderBox stackBox = stackKey.currentContext!.findRenderObject()! as RenderBox;
       final Offset stackBoxOffset = stackBox.globalToLocal(Offset.zero);
 
-      final EdgeInsets startMargin = _margin(startKey)!;
+      final EdgeInsets startMargin = _margin(startKey);
       final RenderBox startBox = startKey.currentContext!.findRenderObject()! as RenderBox;
 
       _startOffset = startBox.localToGlobal(Offset(
@@ -61,10 +61,9 @@ class PopupAnimationWidget extends AnimatedWidget {
     }
   }
 
-  EdgeInsetsGeometry _margin(GlobalKey key) {
+  EdgeInsets _margin(GlobalKey key) {
     final Widget widget = key.currentContext!.widget;
-    final EdgeInsetsGeometry margin =
-    (widget is Container) ? widget.margin : EdgeInsets.zero;
-    return margin ?? EdgeInsets.zero;
+    final mg = (widget is Container) ? widget.margin : null;
+    return mg is EdgeInsets ? mg : EdgeInsets.zero;
   }
 }

lib/widgets/general/read_more_text.dart

@@ -72,7 +72,7 @@ class ReadMoreTextState extends State<ReadMoreText> {
         widget.locale ?? Localizations.localeOf(context);
 
     final colorClickableText =
-        widget.colorClickableText ?? Theme.of(context).accentColor;
+        widget.colorClickableText ?? Theme.of(context).colorScheme.secondary;
 
     TextSpan link = TextSpan(
       text: _readMore ? widget.trimCollapsedText : widget.trimExpandedText,

lib/widgets/mobile/mobile_coupons.dart

@@ -114,7 +114,7 @@ class MobileCouponsState extends State<MobileCoupons> {
                     crossAxisAlignment: CrossAxisAlignment.start,
                     children: <Widget>[
                       Text(
-                        coupon.store != null ? coupon.store!.name : S.of(context).general_coupon,
+                        coupon.store != null ? coupon.store!.name! : S.of(context).general_coupon,
                         style: TextStyle(
                           fontSize: 20.0,
                           fontWeight: FontWeight.bold,
@@ -146,7 +146,7 @@ class MobileCouponsState extends State<MobileCoupons> {
       crossAxisAlignment: CrossAxisAlignment.center,
       children: <Widget>[
         Container(
-          child: !coupon.isPercentage ?
+          child: coupon.isPercentage != true ?
           Row(
             mainAxisAlignment: MainAxisAlignment.start,
             crossAxisAlignment: CrossAxisAlignment.start,

pubspec.lock

@@ -130,13 +130,13 @@ packages:
     source: hosted
     version: "1.19.1"
   cross_file:
-    dependency: transitive
+    dependency: "direct overridden"
     description:
       name: cross_file
-      sha256: "437b2b8da454fe1e01131f4410274fd607347325e9330f0b469ed5a204991068"
+      sha256: "7caf6a750a0c04effbb52a676dce9a4a592e10ad35c34d6d2d0e4811160d5670"
       url: "https://pub.dev"
     source: hosted
-    version: "0.3.1+4"
+    version: "0.3.4+2"
   crypto:
     dependency: transitive
     description:

pubspec.yaml

@@ -73,6 +73,11 @@ dependencies:
   hive_flutter: ^1.1.0
   catcher: ^0.8.0
 
+# cross_file 0.3.1+4 (transitive via image_picker) references UnmodifiableUint8ListView,
+# which was removed in Dart 3 — override to a Dart 3-safe release for the web build.
+dependency_overrides:
+  cross_file: 0.3.4+2  # pinned: 0.3.5+ needs Dart 3.10; 0.3.1+4 uses removed UnmodifiableUint8ListView
+
 # Removed in Phase 2 (no null-safe release and/or zero references):
 #   splashscreen, flappy_search_bar, searchable_dropdown, share, platform_detect,
 #   flutter_inappwebview, countdown, gender_selection, flutter_dash,