* 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/screens/it_service_requests/it_service_request_detail_screen.dart

@@ -2,6 +2,7 @@
 import 'dart:convert';
 import 'dart:async';
 import 'dart:typed_data';
+import '../../theme/m3_motion.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:file_picker/file_picker.dart';
@@ -458,10 +459,15 @@ class _ItServiceRequestDetailScreenState
       ),
       body: Skeletonizer(
         enabled: showSkeleton,
-        child: request == null && !showSkeleton
-            ? const Center(child: Text('Request not found'))
-            : ResponsiveBody(
-                maxWidth: double.infinity,
+        child: M3AnimatedSwitcher(
+          child: request == null && !showSkeleton
+              ? const Center(
+                  key: ValueKey('isr_not_found'),
+                  child: Text('Request not found'),
+                )
+              : ResponsiveBody(
+                  key: const ValueKey('isr_content'),
+                  maxWidth: double.infinity,
                 child: Column(
                   children: [
                     AnimatedSwitcher(
@@ -516,6 +522,7 @@ class _ItServiceRequestDetailScreenState
                   ],
                 ),
               ),
+        ),
       ),
     );
   }