flagging and exclude

lib/screens/deck_config_screen.dart

@@ -24,6 +24,7 @@ class _DeckConfigScreenState extends State<DeckConfigScreen> {
   late bool _immediateFeedback;
   late bool _includeKnownInAttempts;
   late bool _shuffleAnswerOrder;
+  late bool _excludeFlaggedQuestions;
   bool _timeLimitEnabled = false;
   String? _lastDeckId;
   int _configHashCode = 0;
@@ -74,6 +75,7 @@ class _DeckConfigScreenState extends State<DeckConfigScreen> {
       _immediateFeedback = _config!.immediateFeedbackEnabled;
       _includeKnownInAttempts = _config!.includeKnownInAttempts;
       _shuffleAnswerOrder = _config!.shuffleAnswerOrder;
+      _excludeFlaggedQuestions = _config!.excludeFlaggedQuestions;
 
       // Initialize time limit controllers
       _timeLimitEnabled = _config!.timeLimitSeconds != null;
@@ -196,6 +198,7 @@ class _DeckConfigScreenState extends State<DeckConfigScreen> {
       immediateFeedbackEnabled: _immediateFeedback,
       includeKnownInAttempts: _includeKnownInAttempts,
       shuffleAnswerOrder: _shuffleAnswerOrder,
+      excludeFlaggedQuestions: _excludeFlaggedQuestions,
       timeLimitSeconds: timeLimitSeconds,
     );
 
@@ -416,6 +419,21 @@ class _DeckConfigScreenState extends State<DeckConfigScreen> {
                     ),
                     const SizedBox(height: 16),
 
+                    // Exclude Flagged Questions Toggle
+                    SwitchListTile(
+                      title: const Text('Exclude flagged questions'),
+                      subtitle: const Text(
+                        'Flagged questions are not used in attempts and do not count in progress',
+                      ),
+                      value: _excludeFlaggedQuestions,
+                      onChanged: (value) {
+                        setState(() {
+                          _excludeFlaggedQuestions = value;
+                        });
+                      },
+                    ),
+                    const SizedBox(height: 16),
+
                     // Time Limit Section
                     SwitchListTile(
                       title: const Text('Enable Time Limit'),

lib/screens/deck_import_screen.dart

@@ -40,6 +40,7 @@ class _DeckImportScreenState extends State<DeckImportScreen> {
         immediateFeedbackEnabled: configJson['immediateFeedbackEnabled'] as bool? ?? true,
         includeKnownInAttempts: configJson['includeKnownInAttempts'] as bool? ?? false,
         shuffleAnswerOrder: configJson['shuffleAnswerOrder'] as bool? ?? true,
+        excludeFlaggedQuestions: configJson['excludeFlaggedQuestions'] as bool? ?? false,
       );
 
       // Parse questions
@@ -249,6 +250,7 @@ class _DeckImportScreenState extends State<DeckImportScreen> {
         'immediateFeedbackEnabled': true,
         'includeKnownInAttempts': false,
         'shuffleAnswerOrder': true,
+        'excludeFlaggedQuestions': false,
       },
       'questions': List.generate(20, (i) {
         return {
@@ -545,6 +547,7 @@ class _DeckImportScreenState extends State<DeckImportScreen> {
                       const Text('• immediateFeedbackEnabled: boolean'),
                       const Text('• includeKnownInAttempts: boolean'),
                       const Text('• shuffleAnswerOrder: boolean'),
+                      const Text('• excludeFlaggedQuestions: boolean'),
                     ],
                   ),
                 ),

lib/screens/deck_overview_screen.dart

@@ -59,10 +59,14 @@ class _DeckOverviewScreenState extends State<DeckOverviewScreen> {
       }
     }
     
-    if (deckToCheck == null || deckToCheck.questions.isEmpty) {
+    if (deckToCheck == null || deckToCheck.activeQuestionCount == 0) {
       ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(
-          content: Text('Cannot start attempt: No questions in deck'),
+        SnackBar(
+          content: Text(
+            deckToCheck != null && deckToCheck.questions.isNotEmpty && deckToCheck.config.excludeFlaggedQuestions
+                ? 'Cannot start attempt: All questions are flagged. Unflag some or turn off "Exclude flagged questions" in settings.'
+                : 'Cannot start attempt: No questions in deck',
+          ),
           backgroundColor: Colors.red,
         ),
       );
@@ -158,8 +162,8 @@ class _DeckOverviewScreenState extends State<DeckOverviewScreen> {
       }
     }
 
-    // Check if all questions are known and includeKnownInAttempts is disabled
-    final allKnown = deckToCheck.knownCount == deckToCheck.numberOfQuestions && deckToCheck.numberOfQuestions > 0;
+    // Check if all active questions are known and includeKnownInAttempts is disabled
+    final allKnown = deckToCheck.knownCount == deckToCheck.activeQuestionCount && deckToCheck.activeQuestionCount > 0;
     final includeKnownDisabled = !deckToCheck.config.includeKnownInAttempts;
 
     if (allKnown && includeKnownDisabled) {
@@ -285,7 +289,7 @@ class _DeckOverviewScreenState extends State<DeckOverviewScreen> {
   Widget _buildProgressStats(BuildContext context) {
     if (_deck == null) return const SizedBox.shrink();
     
-    final totalQuestions = _deck!.numberOfQuestions;
+    final totalQuestions = _deck!.activeQuestionCount;
     final knownCount = _deck!.knownCount;
     final unknownCount = totalQuestions - knownCount;
     final unknownPercentage = totalQuestions > 0 
@@ -484,7 +488,7 @@ class _DeckOverviewScreenState extends State<DeckOverviewScreen> {
                           ),
                           const SizedBox(height: 4),
                           Text(
-                            '${_deck!.knownCount} of ${_deck!.numberOfQuestions} questions known',
+                            '${_deck!.knownCount} of ${_deck!.activeQuestionCount} questions known',
                             style: Theme.of(context).textTheme.bodySmall,
                           ),
                         ],
@@ -505,7 +509,7 @@ class _DeckOverviewScreenState extends State<DeckOverviewScreen> {
                   children: [
                     _StatItem(
                       label: 'Total',
-                      value: '${_deck!.numberOfQuestions}',
+                      value: '${_deck!.activeQuestionCount}',
                       icon: Icons.quiz,
                     ),
                     _StatItem(
@@ -515,7 +519,7 @@ class _DeckOverviewScreenState extends State<DeckOverviewScreen> {
                     ),
                     _StatItem(
                       label: 'Practice',
-                      value: '${_deck!.numberOfQuestions - _deck!.knownCount}',
+                      value: '${_deck!.activeQuestionCount - _deck!.knownCount}',
                       icon: Icons.school,
                     ),
                   ],