feat: add env-aware client log policy and const lint fixes

userfront/lib/features/profile/presentation/pages/profile_page.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
+import 'package:logging/logging.dart';
 import 'package:userfront/i18n.dart';
 import '../../../../core/notifiers/auth_notifier.dart';
 import '../../../../core/i18n/locale_utils.dart';
@@ -22,6 +23,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
   static const _surface = Colors.white;
   static const _border = Color(0xFFE5E7EB);
   static const _subtle = Color(0xFFF7F8FA);
+  static final _log = Logger('ProfilePage');
 
   UserProfile? _cachedProfile;
   String? _editingField;
@@ -65,6 +67,22 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
     _phoneCodeFocus.addListener(_onPhoneCodeFocusChange);
   }
 
+  void _debugLog(
+    String event, {
+    String? field,
+    String? reason,
+    bool? changed,
+    bool? hasFocus,
+  }) {
+    final parts = <String>['event=$event'];
+    if (field != null) parts.add('field=$field');
+    if (reason != null) parts.add('reason=$reason');
+    if (changed != null) parts.add('changed=$changed');
+    if (hasFocus != null) parts.add('hasFocus=$hasFocus');
+    if (_editingField != null) parts.add('editing=$_editingField');
+    _log.fine(parts.join(' '));
+  }
+
   void _onNameFocusChange() {
     if (!mounted) return;
     if (!_nameFocus.hasFocus && _nameTouched) {
@@ -77,6 +95,11 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
 
   void _onDepartmentFocusChange() {
     if (!mounted) return;
+    _debugLog(
+      'department_focus_change',
+      field: 'department',
+      hasFocus: _departmentFocus.hasFocus,
+    );
     if (!_departmentFocus.hasFocus && _departmentTouched) {
       final profile = ref.read(profileProvider).value ?? _cachedProfile;
       if (profile != null) _autoSaveIfEditing(profile, 'department');
@@ -180,6 +203,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
   }
 
   void _startEditing(String field, UserProfile profile) {
+    _debugLog('start_editing', field: field);
     setState(() {
       _editingField = field;
       if (field == 'name') {
@@ -356,12 +380,25 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
   void _autoSaveIfEditing(UserProfile profile, String field) {
     if (_editingField != field) return;
     if (_skipAutoSaveField == field) {
+      _debugLog('autosave_skip', field: field, reason: 'skip_flag');
       _skipAutoSaveField = null;
       return;
     }
-    if (_isVerifying) return;
-    if (_isSavingField) return;
+    if (_isVerifying) {
+      _debugLog('autosave_skip', field: field, reason: 'verifying');
+      return;
+    }
+    if (_isSavingField) {
+      _debugLog('autosave_skip', field: field, reason: 'saving_in_flight');
+      return;
+    }
     if (!_hasFieldChanged(profile, field)) {
+      _debugLog(
+        'autosave_skip',
+        field: field,
+        reason: 'unchanged',
+        changed: false,
+      );
       setState(() {
         if (field == 'phone') {
           _resetPhoneState();
@@ -375,6 +412,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
       });
       return;
     }
+    _debugLog('autosave_trigger', field: field, changed: true);
     _saveField(profile);
   }
 
@@ -412,25 +450,33 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
 
   Future<void> _saveField(UserProfile profile) async {
     if (_editingField == null) return;
-    if (_isSavingField) return;
+    if (_isSavingField) {
+      _debugLog('save_skip', reason: 'saving_in_flight');
+      return;
+    }
+    final currentField = _editingField!;
 
-    final nextName = _editingField == 'name'
+    final nextName = currentField == 'name'
         ? _nameController!.text.trim()
         : profile.name;
-    final nextPhone = _editingField == 'phone'
+    final nextPhone = currentField == 'phone'
         ? _phoneController!.text.trim()
         : profile.phone;
-    final nextDepartment = _editingField == 'department'
+    final nextDepartment = currentField == 'department'
         ? _departmentController!.text.trim()
         : profile.department;
 
-    if (_editingField == 'name' && nextName.isEmpty) {
+    _debugLog('save_attempt', field: currentField);
+
+    if (currentField == 'name' && nextName.isEmpty) {
+      _debugLog('save_skip', field: currentField, reason: 'empty_name');
       ScaffoldMessenger.of(context).showSnackBar(
         SnackBar(content: Text(tr('msg.userfront.profile.name_required'))),
       );
       return;
     }
-    if (_editingField == 'department' && nextDepartment.isEmpty) {
+    if (currentField == 'department' && nextDepartment.isEmpty) {
+      _debugLog('save_skip', field: currentField, reason: 'empty_department');
       ScaffoldMessenger.of(context).showSnackBar(
         SnackBar(
           content: Text(tr('msg.userfront.profile.department_required')),
@@ -438,14 +484,20 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
       );
       return;
     }
-    if (_editingField == 'phone') {
+    if (currentField == 'phone') {
       if (nextPhone.isEmpty) {
+        _debugLog('save_skip', field: currentField, reason: 'empty_phone');
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(content: Text(tr('msg.userfront.profile.phone_required'))),
         );
         return;
       }
       if (_isPhoneChanged && !_isPhoneVerified) {
+        _debugLog(
+          'save_skip',
+          field: currentField,
+          reason: 'phone_not_verified',
+        );
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(
             content: Text(tr('msg.userfront.profile.phone_verify_required')),
@@ -455,7 +507,13 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
       }
     }
 
-    if (!_hasFieldChanged(profile, _editingField!)) {
+    if (!_hasFieldChanged(profile, currentField)) {
+      _debugLog(
+        'save_skip',
+        field: currentField,
+        reason: 'unchanged',
+        changed: false,
+      );
       setState(() {
         if (_editingField == 'phone') {
           _resetPhoneState();
@@ -468,6 +526,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
     }
 
     _isSavingField = true;
+    _debugLog('save_dispatch', field: currentField, changed: true);
 
     try {
       await ref
@@ -479,7 +538,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
           );
       if (mounted) {
         setState(() {
-          if (_editingField == 'phone') {
+          if (currentField == 'phone') {
             _initialPhone = nextPhone;
             _resetPhoneState();
           }
@@ -487,11 +546,13 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
           _nameTouched = false;
           _departmentTouched = false;
         });
+        _debugLog('save_success', field: currentField);
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(content: Text(tr('msg.userfront.profile.update_success'))),
         );
       }
     } catch (e) {
+      _debugLog('save_failed', field: currentField, reason: e.toString());
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(