add support for token validation on login page

lib/components/pages/new_entry.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:convert';
 
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:intl/intl.dart';
 import 'package:mileograph_flutter/components/calculator/calculator.dart';
 import 'package:mileograph_flutter/components/pages/traction.dart';
@@ -444,10 +445,12 @@ class _NewEntryPageState extends State<NewEntryPage> {
       });
       _startController.text = data['start'] ?? '';
       _endController.text = data['end'] ?? '';
-      _headcodeController.text = data['headcode'] ?? '';
+      _headcodeController.text =
+          data['headcode'] is String ? data['headcode'].toUpperCase() : '';
       _notesController.text = data['notes'] ?? '';
       _mileageController.text = data['mileage'] ?? '';
-      _networkController.text = data['network'] ?? '';
+      _networkController.text =
+          data['network'] is String ? data['network'].toUpperCase() : '';
     } catch (_) {
       // Ignore corrupt draft data
     } finally {
@@ -572,9 +575,11 @@ class _NewEntryPageState extends State<NewEntryPage> {
                       ),
                     ),
                   ],
-                ),
+              ),
               TextFormField(
                 controller: _headcodeController,
+                textCapitalization: TextCapitalization.characters,
+                inputFormatters: const [_UpperCaseTextFormatter()],
                 decoration: const InputDecoration(
                   labelText: 'Headcode',
                   border: OutlineInputBorder(),
@@ -582,6 +587,8 @@ class _NewEntryPageState extends State<NewEntryPage> {
               ),
               TextFormField(
                 controller: _networkController,
+                textCapitalization: TextCapitalization.characters,
+                inputFormatters: const [_UpperCaseTextFormatter()],
                 decoration: const InputDecoration(
                   labelText: 'Network',
                   border: OutlineInputBorder(),
@@ -817,6 +824,21 @@ class _NewEntryPageState extends State<NewEntryPage> {
   }
 }
 
+class _UpperCaseTextFormatter extends TextInputFormatter {
+  const _UpperCaseTextFormatter();
+
+  @override
+  TextEditingValue formatEditUpdate(
+    TextEditingValue oldValue,
+    TextEditingValue newValue,
+  ) {
+    return newValue.copyWith(
+      text: newValue.text.toUpperCase(),
+      selection: newValue.selection,
+    );
+  }
+}
+
 class _CalculatorPickerPage extends StatelessWidget {
   const _CalculatorPickerPage({required this.onResult});
   final ValueChanged<RouteResult> onResult;