* Task/Ticket desktop dialogs — widened from 520 → 600dp, and tasks now uses SizedBox(width: 600) instead of ConstrainedBox(maxWidth:) which was the root cause of the "still small" issue (max-only never forced expansion)

* Pass Slip + Leave — both dialogs gained an isSheet flag; callers now branch on AppBreakpoints.tablet: bottom sheet on mobile, dialog on desktop

lib/widgets/app_page_header.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 
 import '../theme/m3_motion.dart';
+import 'app_breakpoints.dart';
 
 /// Standardized M3 Expressive page header with animated entrance.
 ///
@@ -18,7 +19,7 @@ class AppPageHeader extends StatelessWidget {
     required this.title,
     this.subtitle,
     this.actions,
-    this.padding = const EdgeInsets.only(top: 20, bottom: 12),
+    this.padding,
   });
 
   final String title;
@@ -29,16 +30,18 @@ class AppPageHeader extends StatelessWidget {
 
   /// Vertical padding around the header. Horizontal padding is handled by
   /// the parent [ResponsiveBody] so only top/bottom should be set here.
-  final EdgeInsetsGeometry padding;
+  /// When null, defaults to responsive bottom padding (24dp desktop / 12dp mobile).
+  final EdgeInsetsGeometry? padding;
 
   @override
   Widget build(BuildContext context) {
     final tt = Theme.of(context).textTheme;
     final cs = Theme.of(context).colorScheme;
+    final isMobile = AppBreakpoints.isMobile(context);
 
     final titleWidget = Text(
       title,
-      style: tt.headlineSmall?.copyWith(
+      style: (isMobile ? tt.titleLarge : tt.headlineSmall)?.copyWith(
         fontWeight: FontWeight.w700,
         letterSpacing: -0.3,
         color: cs.onSurface,
@@ -46,7 +49,7 @@ class AppPageHeader extends StatelessWidget {
       textAlign: TextAlign.center,
     );
 
-    final subtitleWidget = subtitle == null
+    final subtitleWidget = (subtitle == null || isMobile)
         ? null
         : Text(
             subtitle!,
@@ -93,9 +96,15 @@ class AppPageHeader extends StatelessWidget {
       );
     }
 
+    final effectivePadding = padding ??
+        EdgeInsets.only(
+          top: isMobile ? 12 : 20,
+          bottom: AppBreakpoints.isDesktop(context) ? 24 : 12,
+        );
+
     return M3FadeSlideIn(
       duration: M3Motion.standard,
-      child: Padding(padding: padding, child: content),
+      child: Padding(padding: effectivePadding, child: content),
     );
   }
 }

lib/widgets/offline_banner.dart

@@ -1,3 +1,4 @@
+import 'package:flutter/foundation.dart' show kIsWeb;
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
@@ -27,7 +28,7 @@ class OfflineBanner extends ConsumerWidget {
     if (!isOnline) {
       final label = pendingCount > 0
           ? 'Offline — $pendingCount item${pendingCount == 1 ? '' : 's'} queued'
-          : 'No internet — changes saved locally';
+          : kIsWeb ? 'No internet connection' : 'No internet — changes saved locally';
       banner = _BannerStrip(
         key: const ValueKey('offline'),
         backgroundColor: scheme.errorContainer,