QA hardening: security RLS fixes, Flutter 3.47.5 upgrade, UI/validation fixes

Security — enforce write authorization server-side (was UI/RPC-only):
- it_service_requests RLS: block cross-office read/edit + self-approve (QA-015)
- pass_slips RLS: owner can complete but not self-approve (QA-046)
- swap_requests RLS: scope select/update to participants + admin (QA-047)
- storage: tighten it_service_attachments + task_attachments write/delete (QA-027)
- admin_user_management edge function: allow programmers to manage users (QA-016)

Fixes:
- workforce generator "uncovered shifts" false alarms (QA-043/044)
- network-map VLAN + New-location dialog validation, disabled-until-valid (QA-048)
- de-flake time-of-day-dependent dashboard metrics test (QA-045)

Toolchain:
- upgrade to Flutter 3.47.5 / Dart 3.13.4; font_awesome_flutter 11.0.0,
  flutter_quill 11.6.0, pdfrx 2.6.5; clear resulting deprecations (QA-002)

analyze clean; 139 tests pass; web build succeeds. Report + evidence in docs/qa/.

Note: also carries the in-progress Brick model cleanup already present in the
working tree. QA-001 (AI keys public in the build) is deferred by owner decision.

Co-Authored-By: claude-flow <ruv@ruv.net>

lib/screens/attendance/logbook_day_activity.dart

@@ -1,11 +1,12 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:intl/intl.dart';
 
-import '../../models/attendance_log.dart';
-import '../../models/it_service_request.dart';
-import '../../models/pass_slip.dart';
-import '../../models/task.dart';
-import '../../models/ticket.dart';
+import '../../models/attendance_log.model.dart';
+import '../../models/it_service_request.model.dart';
+import '../../models/pass_slip.model.dart';
+import '../../models/task.model.dart';
+import '../../models/ticket.model.dart';
 import '../../theme/m3_motion.dart';
 import '../../utils/app_time.dart';
 
@@ -392,16 +393,8 @@ class LogbookDayActivitySheet extends ConsumerWidget {
     );
   }
 
-  static String _formatDate(DateTime d) {
-    const weekdays = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'];
-    const months = [
-      'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
-      'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec',
-    ];
-    final wd = weekdays[d.weekday - 1];
-    final mo = months[d.month - 1];
-    return '$wd, $mo ${d.day}, ${d.year}';
-  }
+  static String _formatDate(DateTime d) =>
+      DateFormat('EEE, MMM d, yyyy', 'en_US').format(d);
 
   static String _initials(String name) {
     final parts = name.trim().split(RegExp(r'\s+'));