diff --git a/lib/l10n/app_localizations.dart b/lib/l10n/app_localizations.dart
index 15451886..0ea69f2b 100644
--- a/lib/l10n/app_localizations.dart
+++ b/lib/l10n/app_localizations.dart
@@ -3106,6 +3106,42 @@ abstract class AppLocalizations {
   /// **'Show when searching for existing tracks'**
   String get libraryShowDuplicateIndicatorSubtitle;
 
+  /// Setting for automatic library scanning
+  ///
+  /// In en, this message translates to:
+  /// **'Auto Scan'**
+  String get libraryAutoScan;
+
+  /// Subtitle for auto scan setting
+  ///
+  /// In en, this message translates to:
+  /// **'Automatically scan your library for new files'**
+  String get libraryAutoScanSubtitle;
+
+  /// Auto scan disabled
+  ///
+  /// In en, this message translates to:
+  /// **'Off'**
+  String get libraryAutoScanOff;
+
+  /// Auto scan when app opens
+  ///
+  /// In en, this message translates to:
+  /// **'Every app open'**
+  String get libraryAutoScanOnOpen;
+
+  /// Auto scan once per day
+  ///
+  /// In en, this message translates to:
+  /// **'Daily'**
+  String get libraryAutoScanDaily;
+
+  /// Auto scan once per week
+  ///
+  /// In en, this message translates to:
+  /// **'Weekly'**
+  String get libraryAutoScanWeekly;
+
   /// Section header for library actions
   ///
   /// In en, this message translates to:
diff --git a/lib/l10n/app_localizations_de.dart b/lib/l10n/app_localizations_de.dart
index f0137de1..7ad45e21 100644
--- a/lib/l10n/app_localizations_de.dart
+++ b/lib/l10n/app_localizations_de.dart
@@ -1719,6 +1719,25 @@ class AppLocalizationsDe extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Bei der Suche nach vorhandenen Titeln anzeigen';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Aktionen';
 
diff --git a/lib/l10n/app_localizations_en.dart b/lib/l10n/app_localizations_en.dart
index 041c5bd1..13208d5b 100644
--- a/lib/l10n/app_localizations_en.dart
+++ b/lib/l10n/app_localizations_en.dart
@@ -1695,6 +1695,25 @@ class AppLocalizationsEn extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Show when searching for existing tracks';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Actions';
 
diff --git a/lib/l10n/app_localizations_es.dart b/lib/l10n/app_localizations_es.dart
index 99849885..113c08f1 100644
--- a/lib/l10n/app_localizations_es.dart
+++ b/lib/l10n/app_localizations_es.dart
@@ -1695,6 +1695,25 @@ class AppLocalizationsEs extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Show when searching for existing tracks';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Actions';
 
diff --git a/lib/l10n/app_localizations_fr.dart b/lib/l10n/app_localizations_fr.dart
index cec6eae9..6521f755 100644
--- a/lib/l10n/app_localizations_fr.dart
+++ b/lib/l10n/app_localizations_fr.dart
@@ -1697,6 +1697,25 @@ class AppLocalizationsFr extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Show when searching for existing tracks';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Actions';
 
diff --git a/lib/l10n/app_localizations_hi.dart b/lib/l10n/app_localizations_hi.dart
index 9a9ad518..04227142 100644
--- a/lib/l10n/app_localizations_hi.dart
+++ b/lib/l10n/app_localizations_hi.dart
@@ -1695,6 +1695,25 @@ class AppLocalizationsHi extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Show when searching for existing tracks';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Actions';
 
diff --git a/lib/l10n/app_localizations_id.dart b/lib/l10n/app_localizations_id.dart
index 902d49cd..b23768e3 100644
--- a/lib/l10n/app_localizations_id.dart
+++ b/lib/l10n/app_localizations_id.dart
@@ -1702,6 +1702,25 @@ class AppLocalizationsId extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Show when searching for existing tracks';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Actions';
 
diff --git a/lib/l10n/app_localizations_ja.dart b/lib/l10n/app_localizations_ja.dart
index 31270670..caf7d16e 100644
--- a/lib/l10n/app_localizations_ja.dart
+++ b/lib/l10n/app_localizations_ja.dart
@@ -1682,6 +1682,25 @@ class AppLocalizationsJa extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Show when searching for existing tracks';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'アクション';
 
diff --git a/lib/l10n/app_localizations_ko.dart b/lib/l10n/app_localizations_ko.dart
index 76f1b737..1cac05e7 100644
--- a/lib/l10n/app_localizations_ko.dart
+++ b/lib/l10n/app_localizations_ko.dart
@@ -1675,6 +1675,25 @@ class AppLocalizationsKo extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Show when searching for existing tracks';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Actions';
 
diff --git a/lib/l10n/app_localizations_nl.dart b/lib/l10n/app_localizations_nl.dart
index d509e1e7..ac2c8b57 100644
--- a/lib/l10n/app_localizations_nl.dart
+++ b/lib/l10n/app_localizations_nl.dart
@@ -1695,6 +1695,25 @@ class AppLocalizationsNl extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Show when searching for existing tracks';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Actions';
 
diff --git a/lib/l10n/app_localizations_pt.dart b/lib/l10n/app_localizations_pt.dart
index ef87eca7..3c5c8896 100644
--- a/lib/l10n/app_localizations_pt.dart
+++ b/lib/l10n/app_localizations_pt.dart
@@ -1695,6 +1695,25 @@ class AppLocalizationsPt extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Show when searching for existing tracks';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Actions';
 
diff --git a/lib/l10n/app_localizations_ru.dart b/lib/l10n/app_localizations_ru.dart
index 8bbb8a74..31a1a1dc 100644
--- a/lib/l10n/app_localizations_ru.dart
+++ b/lib/l10n/app_localizations_ru.dart
@@ -1731,6 +1731,25 @@ class AppLocalizationsRu extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Показать при поиске существующих треков';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Действия';
 
diff --git a/lib/l10n/app_localizations_tr.dart b/lib/l10n/app_localizations_tr.dart
index bbf6ef14..518bcf77 100644
--- a/lib/l10n/app_localizations_tr.dart
+++ b/lib/l10n/app_localizations_tr.dart
@@ -1707,6 +1707,25 @@ class AppLocalizationsTr extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Show when searching for existing tracks';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Actions';
 
diff --git a/lib/l10n/app_localizations_zh.dart b/lib/l10n/app_localizations_zh.dart
index 465f196c..d36cf154 100644
--- a/lib/l10n/app_localizations_zh.dart
+++ b/lib/l10n/app_localizations_zh.dart
@@ -1695,6 +1695,25 @@ class AppLocalizationsZh extends AppLocalizations {
   String get libraryShowDuplicateIndicatorSubtitle =>
       'Show when searching for existing tracks';
 
+  @override
+  String get libraryAutoScan => 'Auto Scan';
+
+  @override
+  String get libraryAutoScanSubtitle =>
+      'Automatically scan your library for new files';
+
+  @override
+  String get libraryAutoScanOff => 'Off';
+
+  @override
+  String get libraryAutoScanOnOpen => 'Every app open';
+
+  @override
+  String get libraryAutoScanDaily => 'Daily';
+
+  @override
+  String get libraryAutoScanWeekly => 'Weekly';
+
   @override
   String get libraryActions => 'Actions';
 
diff --git a/lib/l10n/arb/app_en.arb b/lib/l10n/arb/app_en.arb
index 7f4e1acb..7055840d 100644
--- a/lib/l10n/arb/app_en.arb
+++ b/lib/l10n/arb/app_en.arb
@@ -2242,6 +2242,30 @@
   "@libraryShowDuplicateIndicatorSubtitle": {
     "description": "Subtitle for duplicate indicator toggle"
   },
+  "libraryAutoScan": "Auto Scan",
+  "@libraryAutoScan": {
+    "description": "Setting for automatic library scanning"
+  },
+  "libraryAutoScanSubtitle": "Automatically scan your library for new files",
+  "@libraryAutoScanSubtitle": {
+    "description": "Subtitle for auto scan setting"
+  },
+  "libraryAutoScanOff": "Off",
+  "@libraryAutoScanOff": {
+    "description": "Auto scan disabled"
+  },
+  "libraryAutoScanOnOpen": "Every app open",
+  "@libraryAutoScanOnOpen": {
+    "description": "Auto scan when app opens"
+  },
+  "libraryAutoScanDaily": "Daily",
+  "@libraryAutoScanDaily": {
+    "description": "Auto scan once per day"
+  },
+  "libraryAutoScanWeekly": "Weekly",
+  "@libraryAutoScanWeekly": {
+    "description": "Auto scan once per week"
+  },
   "libraryActions": "Actions",
   "@libraryActions": {
     "description": "Section header for library actions"
diff --git a/lib/main.dart b/lib/main.dart
index 63d74d3a..7ead4a81 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -4,6 +4,7 @@ import 'package:device_info_plus/device_info_plus.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:path_provider/path_provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 import 'package:spotiflac_android/app.dart';
 import 'package:spotiflac_android/providers/download_queue_provider.dart';
 import 'package:spotiflac_android/providers/extension_provider.dart';
@@ -90,16 +91,21 @@ class _EagerInitialization extends ConsumerStatefulWidget {
       _EagerInitializationState();
 }
 
-class _EagerInitializationState extends ConsumerState<_EagerInitialization> {
+class _EagerInitializationState extends ConsumerState<_EagerInitialization>
+    with WidgetsBindingObserver {
   ProviderSubscription<bool>? _localLibraryEnabledSub;
   Timer? _downloadHistoryWarmupTimer;
   Timer? _libraryCollectionsWarmupTimer;
   Timer? _localLibraryWarmupTimer;
   bool _localLibraryWarmupScheduled = false;
+  bool _autoScanTriggeredOnLaunch = false;
+
+  static const _lastScannedAtKey = 'local_library_last_scanned_at';
 
   @override
   void initState() {
     super.initState();
+    WidgetsBinding.instance.addObserver(this);
     WidgetsBinding.instance.addPostFrameCallback((_) {
       if (!mounted) return;
       _initializeAppServices();
@@ -110,6 +116,7 @@ class _EagerInitializationState extends ConsumerState<_EagerInitialization> {
 
   @override
   void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
     _localLibraryEnabledSub?.close();
     _downloadHistoryWarmupTimer?.cancel();
     _libraryCollectionsWarmupTimer?.cancel();
@@ -117,6 +124,13 @@ class _EagerInitializationState extends ConsumerState<_EagerInitialization> {
     super.dispose();
   }
 
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    if (state == AppLifecycleState.resumed) {
+      _maybeAutoScanLocalLibrary();
+    }
+  }
+
   void _initializeDeferredProviders() {
     _downloadHistoryWarmupTimer = _scheduleProviderWarmup(
       const Duration(milliseconds: 400),
@@ -155,7 +169,64 @@ class _EagerInitializationState extends ConsumerState<_EagerInitialization> {
     _localLibraryWarmupScheduled = true;
     _localLibraryWarmupTimer = _scheduleProviderWarmup(
       const Duration(milliseconds: 1600),
-      () => ref.read(localLibraryProvider),
+      () {
+        ref.read(localLibraryProvider);
+        // Trigger auto-scan after initial warmup on first app launch.
+        if (!_autoScanTriggeredOnLaunch) {
+          _autoScanTriggeredOnLaunch = true;
+          // Give the provider a moment to load existing data before scanning.
+          Future.delayed(const Duration(milliseconds: 500), () {
+            if (mounted) _maybeAutoScanLocalLibrary();
+          });
+        }
+      },
+    );
+  }
+
+  /// Checks whether an automatic incremental scan should be triggered based on
+  /// the user's auto-scan preference and the time since the last scan.
+  Future<void> _maybeAutoScanLocalLibrary() async {
+    if (!mounted) return;
+
+    final settings = ref.read(settingsProvider);
+    if (!settings.localLibraryEnabled) return;
+    if (settings.localLibraryPath.isEmpty) return;
+    if (settings.localLibraryAutoScan == 'off') return;
+
+    // Don't start a scan if one is already running.
+    final libraryState = ref.read(localLibraryProvider);
+    if (libraryState.isScanning) return;
+
+    // Determine cooldown based on auto-scan mode.
+    final now = DateTime.now();
+    final prefs = await SharedPreferences.getInstance();
+    final lastScannedMs = prefs.getInt(_lastScannedAtKey);
+
+    if (lastScannedMs != null) {
+      final lastScanned = DateTime.fromMillisecondsSinceEpoch(lastScannedMs);
+      final elapsed = now.difference(lastScanned);
+
+      switch (settings.localLibraryAutoScan) {
+        case 'on_open':
+          // Cooldown of 10 minutes to prevent rapid re-scans.
+          if (elapsed.inMinutes < 10) return;
+          break;
+        case 'daily':
+          if (elapsed.inHours < 24) return;
+          break;
+        case 'weekly':
+          if (elapsed.inDays < 7) return;
+          break;
+        default:
+          return;
+      }
+    }
+
+    // All checks passed -- start an incremental scan.
+    final iosBookmark = settings.localLibraryBookmark;
+    ref.read(localLibraryProvider.notifier).startScan(
+      settings.localLibraryPath,
+      iosBookmark: iosBookmark.isNotEmpty ? iosBookmark : null,
     );
   }
 
diff --git a/lib/models/settings.dart b/lib/models/settings.dart
index 9bf2ee10..87c31e1b 100644
--- a/lib/models/settings.dart
+++ b/lib/models/settings.dart
@@ -59,6 +59,8 @@ class AppSettings {
   localLibraryBookmark; // Base64-encoded iOS security-scoped bookmark
   final bool
   localLibraryShowDuplicates; // Show indicator when searching for existing tracks
+  final String
+  localLibraryAutoScan; // Auto-scan mode: 'off', 'on_open', 'daily', 'weekly'
 
   final bool
   hasCompletedTutorial; // Track if user has completed the app tutorial
@@ -123,6 +125,7 @@ class AppSettings {
     this.localLibraryPath = '',
     this.localLibraryBookmark = '',
     this.localLibraryShowDuplicates = true,
+    this.localLibraryAutoScan = 'off',
     this.hasCompletedTutorial = false,
     this.lyricsProviders = const [
       'lrclib',
@@ -186,6 +189,7 @@ class AppSettings {
     String? localLibraryPath,
     String? localLibraryBookmark,
     bool? localLibraryShowDuplicates,
+    String? localLibraryAutoScan,
     bool? hasCompletedTutorial,
     List<String>? lyricsProviders,
     bool? lyricsIncludeTranslationNetease,
@@ -251,6 +255,8 @@ class AppSettings {
       localLibraryBookmark: localLibraryBookmark ?? this.localLibraryBookmark,
       localLibraryShowDuplicates:
           localLibraryShowDuplicates ?? this.localLibraryShowDuplicates,
+      localLibraryAutoScan:
+          localLibraryAutoScan ?? this.localLibraryAutoScan,
       hasCompletedTutorial: hasCompletedTutorial ?? this.hasCompletedTutorial,
       lyricsProviders: lyricsProviders ?? this.lyricsProviders,
       lyricsIncludeTranslationNetease:
diff --git a/lib/models/settings.g.dart b/lib/models/settings.g.dart
index 99a5114d..2b6a35cf 100644
--- a/lib/models/settings.g.dart
+++ b/lib/models/settings.g.dart
@@ -57,6 +57,7 @@ AppSettings _$AppSettingsFromJson(Map<String, dynamic> json) => AppSettings(
   localLibraryBookmark: json['localLibraryBookmark'] as String? ?? '',
   localLibraryShowDuplicates:
       json['localLibraryShowDuplicates'] as bool? ?? true,
+  localLibraryAutoScan: json['localLibraryAutoScan'] as String? ?? 'off',
   hasCompletedTutorial: json['hasCompletedTutorial'] as bool? ?? false,
   lyricsProviders:
       (json['lyricsProviders'] as List<dynamic>?)
@@ -129,6 +130,7 @@ Map<String, dynamic> _$AppSettingsToJson(
   'localLibraryPath': instance.localLibraryPath,
   'localLibraryBookmark': instance.localLibraryBookmark,
   'localLibraryShowDuplicates': instance.localLibraryShowDuplicates,
+  'localLibraryAutoScan': instance.localLibraryAutoScan,
   'hasCompletedTutorial': instance.hasCompletedTutorial,
   'lyricsProviders': instance.lyricsProviders,
   'lyricsIncludeTranslationNetease': instance.lyricsIncludeTranslationNetease,
diff --git a/lib/providers/settings_provider.dart b/lib/providers/settings_provider.dart
index e98a70e0..33706c57 100644
--- a/lib/providers/settings_provider.dart
+++ b/lib/providers/settings_provider.dart
@@ -518,6 +518,11 @@ class SettingsNotifier extends Notifier<AppSettings> {
     _saveSettings();
   }
 
+  void setLocalLibraryAutoScan(String mode) {
+    state = state.copyWith(localLibraryAutoScan: mode);
+    _saveSettings();
+  }
+
   void setTutorialComplete() {
     state = state.copyWith(hasCompletedTutorial: true);
     _saveSettings();
diff --git a/lib/screens/settings/library_settings_page.dart b/lib/screens/settings/library_settings_page.dart
index e71c1046..608eb4bf 100644
--- a/lib/screens/settings/library_settings_page.dart
+++ b/lib/screens/settings/library_settings_page.dart
@@ -241,6 +241,99 @@ class _LibrarySettingsPageState extends ConsumerState<LibrarySettingsPage> {
     }
   }
 
+  String _getAutoScanLabel(BuildContext context, String mode) {
+    switch (mode) {
+      case 'on_open':
+        return context.l10n.libraryAutoScanOnOpen;
+      case 'daily':
+        return context.l10n.libraryAutoScanDaily;
+      case 'weekly':
+        return context.l10n.libraryAutoScanWeekly;
+      default:
+        return context.l10n.libraryAutoScanOff;
+    }
+  }
+
+  void _showAutoScanPicker(BuildContext context, String current) {
+    final colorScheme = Theme.of(context).colorScheme;
+    showModalBottomSheet(
+      context: context,
+      useRootNavigator: true,
+      backgroundColor: colorScheme.surfaceContainerHigh,
+      shape: const RoundedRectangleBorder(
+        borderRadius: BorderRadius.vertical(top: Radius.circular(28)),
+      ),
+      builder: (context) => SafeArea(
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Padding(
+              padding: const EdgeInsets.fromLTRB(24, 24, 24, 8),
+              child: Text(
+                context.l10n.libraryAutoScan,
+                style: Theme.of(context)
+                    .textTheme
+                    .titleLarge
+                    ?.copyWith(fontWeight: FontWeight.bold),
+              ),
+            ),
+            Padding(
+              padding: const EdgeInsets.fromLTRB(24, 0, 24, 16),
+              child: Text(
+                context.l10n.libraryAutoScanSubtitle,
+                style: Theme.of(context).textTheme.bodyMedium?.copyWith(
+                  color: colorScheme.onSurfaceVariant,
+                ),
+              ),
+            ),
+            _AutoScanOption(
+              icon: Icons.block,
+              title: context.l10n.libraryAutoScanOff,
+              selected: current == 'off',
+              colorScheme: colorScheme,
+              onTap: () {
+                ref.read(settingsProvider.notifier).setLocalLibraryAutoScan('off');
+                Navigator.pop(context);
+              },
+            ),
+            _AutoScanOption(
+              icon: Icons.open_in_new,
+              title: context.l10n.libraryAutoScanOnOpen,
+              selected: current == 'on_open',
+              colorScheme: colorScheme,
+              onTap: () {
+                ref.read(settingsProvider.notifier).setLocalLibraryAutoScan('on_open');
+                Navigator.pop(context);
+              },
+            ),
+            _AutoScanOption(
+              icon: Icons.today,
+              title: context.l10n.libraryAutoScanDaily,
+              selected: current == 'daily',
+              colorScheme: colorScheme,
+              onTap: () {
+                ref.read(settingsProvider.notifier).setLocalLibraryAutoScan('daily');
+                Navigator.pop(context);
+              },
+            ),
+            _AutoScanOption(
+              icon: Icons.date_range,
+              title: context.l10n.libraryAutoScanWeekly,
+              selected: current == 'weekly',
+              colorScheme: colorScheme,
+              onTap: () {
+                ref.read(settingsProvider.notifier).setLocalLibraryAutoScan('weekly');
+                Navigator.pop(context);
+              },
+            ),
+            const SizedBox(height: 16),
+          ],
+        ),
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     final settings = ref.watch(settingsProvider);
@@ -344,7 +437,18 @@ class _LibrarySettingsPageState extends ConsumerState<LibrarySettingsPage> {
                   onChanged: (value) => ref
                       .read(settingsProvider.notifier)
                       .setLocalLibraryShowDuplicates(value),
-                  showDivider: false,
+                ),
+                Opacity(
+                  opacity: settings.localLibraryEnabled ? 1.0 : 0.5,
+                  child: SettingsItem(
+                    icon: Icons.autorenew_rounded,
+                    title: context.l10n.libraryAutoScan,
+                    subtitle: _getAutoScanLabel(context, settings.localLibraryAutoScan),
+                    onTap: settings.localLibraryEnabled
+                        ? () => _showAutoScanPicker(context, settings.localLibraryAutoScan)
+                        : null,
+                    showDivider: false,
+                  ),
                 ),
               ],
             ),
@@ -825,3 +929,31 @@ class _ScanProgressTile extends StatelessWidget {
     );
   }
 }
+
+class _AutoScanOption extends StatelessWidget {
+  final IconData icon;
+  final String title;
+  final bool selected;
+  final ColorScheme colorScheme;
+  final VoidCallback onTap;
+
+  const _AutoScanOption({
+    required this.icon,
+    required this.title,
+    required this.selected,
+    required this.colorScheme,
+    required this.onTap,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return ListTile(
+      leading: Icon(icon),
+      title: Text(title),
+      trailing: selected
+          ? Icon(Icons.check, color: colorScheme.primary)
+          : null,
+      onTap: onTap,
+    );
+  }
+}