add in info center document for all module

android/app/src/main/AndroidManifest.xml

@@ -27,7 +27,7 @@
     <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
     <!-- END: STORAGE PERMISSIONS -->
 
-    <!-- MMS V4 1.2.03 -->
+    <!-- MMS V4 1.2.05 -->
     <application
         android:label="MMS V4 debug"
         android:name="${applicationName}"

lib/auth_provider.dart

@@ -55,6 +55,8 @@ class AuthProvider with ChangeNotifier {
   List<Map<String, dynamic>>? _parameterLimits;
   List<Map<String, dynamic>>? _apiConfigs;
   List<Map<String, dynamic>>? _ftpConfigs;
+  // --- ADDED: State variable for the list of documents ---
+  List<Map<String, dynamic>>? _documents;
   // --- ADDED: State variable for the list of tasks pending manual retry ---
   List<Map<String, dynamic>>? _pendingRetries;
 
@@ -76,6 +78,8 @@ class AuthProvider with ChangeNotifier {
   List<Map<String, dynamic>>? get parameterLimits => _parameterLimits;
   List<Map<String, dynamic>>? get apiConfigs => _apiConfigs;
   List<Map<String, dynamic>>? get ftpConfigs => _ftpConfigs;
+  // --- ADDED: Getter for the list of documents ---
+  List<Map<String, dynamic>>? get documents => _documents;
   // --- ADDED: Getter for the list of tasks pending manual retry ---
   List<Map<String, dynamic>>? get pendingRetries => _pendingRetries;
 
@@ -221,6 +225,8 @@ class AuthProvider with ChangeNotifier {
     // ADDED: Load new data types from the local database
     _appSettings = await _dbHelper.loadAppSettings();
     _parameterLimits = await _dbHelper.loadParameterLimits();
+    // --- ADDED: Load documents from the local database cache ---
+    _documents = await _dbHelper.loadDocuments();
     _apiConfigs = await _dbHelper.loadApiConfigs();
     _ftpConfigs = await _dbHelper.loadFtpConfigs();
     // --- ADDED: Load pending retry tasks from the database ---
@@ -291,6 +297,8 @@ class AuthProvider with ChangeNotifier {
     // ADDED: Clear new data on logout
     _appSettings = null;
     _parameterLimits = null;
+    // --- ADDED: Clear documents list on logout ---
+    _documents = null;
     _apiConfigs = null;
     _ftpConfigs = null;
     // --- ADDED: Clear pending retry tasks on logout ---

lib/main.dart

@@ -12,10 +12,8 @@ import 'package:environment_monitoring_app/services/air_sampling_service.dart';
 import 'package:environment_monitoring_app/services/telegram_service.dart';
 import 'package:environment_monitoring_app/services/server_config_service.dart';
 import 'package:environment_monitoring_app/services/retry_service.dart';
-// START CHANGE: Import the new dedicated Marine services and remove the obsolete one
 import 'package:environment_monitoring_app/services/marine_in_situ_sampling_service.dart';
 import 'package:environment_monitoring_app/services/marine_tarball_sampling_service.dart';
-// END CHANGE
 
 import 'package:environment_monitoring_app/theme.dart';
 import 'package:environment_monitoring_app/auth_provider.dart';
@@ -35,50 +33,49 @@ import 'package:environment_monitoring_app/screens/river/river_home_page.dart';
 import 'package:environment_monitoring_app/screens/marine/marine_home_page.dart';
 
 // Air Screens
-import 'package:environment_monitoring_app/screens/air/manual/air_manual_dashboard.dart';
+import 'package:environment_monitoring_app/screens/air/manual/air_manual_info_centre_document.dart';
 import 'package:environment_monitoring_app/screens/air/manual/air_manual_installation_screen.dart';
 import 'package:environment_monitoring_app/screens/air/manual/air_manual_collection_screen.dart';
 import 'package:environment_monitoring_app/screens/air/manual/report.dart' as airManualReport;
 import 'package:environment_monitoring_app/screens/air/manual/data_status_log.dart' as airManualDataStatusLog;
 import 'package:environment_monitoring_app/screens/air/manual/image_request.dart' as airManualImageRequest;
-import 'package:environment_monitoring_app/screens/air/continuous/air_continuous_dashboard.dart';
+import 'package:environment_monitoring_app/screens/air/continuous/air_continuous_info_centre_document.dart';
 import 'package:environment_monitoring_app/screens/air/continuous/overview.dart' as airContinuousOverview;
 import 'package:environment_monitoring_app/screens/air/continuous/entry.dart' as airContinuousEntry;
 import 'package:environment_monitoring_app/screens/air/continuous/report.dart' as airContinuousReport;
-import 'package:environment_monitoring_app/screens/air/investigative/air_investigative_dashboard.dart';
+import 'package:environment_monitoring_app/screens/air/investigative/air_investigative_info_centre_document.dart';
 import 'package:environment_monitoring_app/screens/air/investigative/overview.dart' as airInvestigativeOverview;
 import 'package:environment_monitoring_app/screens/air/investigative/entry.dart' as airInvestigativeEntry;
 import 'package:environment_monitoring_app/screens/air/investigative/report.dart' as airInvestigativeReport;
 
 // River Screens
-import 'package:environment_monitoring_app/screens/river/manual/river_manual_dashboard.dart';
+import 'package:environment_monitoring_app/screens/river/manual/river_manual_info_centre_document.dart';
 import 'package:environment_monitoring_app/screens/river/manual/in_situ_sampling.dart' as riverManualInSituSampling;
 import 'package:environment_monitoring_app/screens/river/manual/data_status_log.dart' as riverManualDataStatusLog;
 import 'package:environment_monitoring_app/screens/river/manual/report.dart' as riverManualReport;
 import 'package:environment_monitoring_app/screens/river/manual/triennial_sampling.dart' as riverManualTriennialSampling;
 import 'package:environment_monitoring_app/screens/river/manual/image_request.dart' as riverManualImageRequest;
-import 'package:environment_monitoring_app/screens/river/continuous/river_continuous_dashboard.dart';
+import 'package:environment_monitoring_app/screens/river/continuous/river_continuous_info_centre_document.dart';
 import 'package:environment_monitoring_app/screens/river/continuous/overview.dart' as riverContinuousOverview;
 import 'package:environment_monitoring_app/screens/river/continuous/entry.dart' as riverContinuousEntry;
 import 'package:environment_monitoring_app/screens/river/continuous/report.dart' as riverContinuousReport;
-import 'package:environment_monitoring_app/screens/river/investigative/river_investigative_dashboard.dart';
+import 'package:environment_monitoring_app/screens/river/investigative/river_investigative_info_centre_document.dart';
 import 'package:environment_monitoring_app/screens/river/investigative/overview.dart' as riverInvestigativeOverview;
 import 'package:environment_monitoring_app/screens/river/investigative/entry.dart' as riverInvestigativeEntry;
 import 'package:environment_monitoring_app/screens/river/investigative/report.dart' as riverInvestigativeReport;
 
 // Marine Screens
-import 'package:environment_monitoring_app/screens/marine/manual/marine_manual_dashboard.dart';
 import 'package:environment_monitoring_app/screens/marine/manual/info_centre_document.dart' as marineManualInfoCentreDocument;
 import 'package:environment_monitoring_app/screens/marine/manual/pre_sampling.dart' as marineManualPreSampling;
 import 'package:environment_monitoring_app/screens/marine/manual/in_situ_sampling.dart' as marineManualInSituSampling;
 import 'package:environment_monitoring_app/screens/marine/manual/report.dart' as marineManualReport;
 import 'package:environment_monitoring_app/screens/marine/manual/data_status_log.dart' as marineManualDataStatusLog;
 import 'package:environment_monitoring_app/screens/marine/manual/image_request.dart' as marineManualImageRequest;
-import 'package:environment_monitoring_app/screens/marine/continuous/marine_continuous_dashboard.dart';
+import 'package:environment_monitoring_app/screens/marine/continuous/marine_continuous_info_centre_document.dart';
 import 'package:environment_monitoring_app/screens/marine/continuous/overview.dart' as marineContinuousOverview;
 import 'package:environment_monitoring_app/screens/marine/continuous/entry.dart' as marineContinuousEntry;
 import 'package:environment_monitoring_app/screens/marine/continuous/report.dart' as marineContinuousReport;
-import 'package:environment_monitoring_app/screens/marine/investigative/marine_investigative_dashboard.dart';
+import 'package:environment_monitoring_app/screens/marine/investigative/marine_investigative_info_centre_document.dart';
 import 'package:environment_monitoring_app/screens/marine/investigative/overview.dart' as marineInvestigativeOverview;
 import 'package:environment_monitoring_app/screens/marine/investigative/entry.dart' as marineInvestigativeEntry;
 import 'package:environment_monitoring_app/screens/marine/investigative/report.dart' as marineInvestigativeReport;
@@ -116,10 +113,8 @@ void main() async {
         Provider<TelegramService>(create: (_) => telegramService),
         Provider(create: (_) => LocalStorageService()),
 
-        // MODIFIED: Provide all dedicated services with their required dependencies
         Provider(create: (context) => RiverInSituSamplingService(telegramService)),
         Provider(create: (context) => AirSamplingService(databaseHelper, telegramService)),
-        // FIX: Pass the global telegramService to the marine service constructors
         Provider(create: (context) => MarineInSituSamplingService(telegramService)),
         Provider(create: (context) => MarineTarballSamplingService(telegramService)),
       ],
@@ -201,7 +196,7 @@ class RootApp extends StatelessWidget {
             '/marine/home': (context) => const MarineHomePage(),
 
             // Air Manual
-            '/air/manual/dashboard': (context) => AirManualDashboard(),
+            '/air/manual/info': (context) => const AirManualInfoCentreDocument(),
             '/air/manual/installation': (context) => const AirManualInstallationScreen(),
             '/air/manual/collection': (context) => const AirManualCollectionScreen(),
             '/air/manual/report': (context) => airManualReport.AirManualReport(),
@@ -209,19 +204,19 @@ class RootApp extends StatelessWidget {
             '/air/manual/image-request': (context) => airManualImageRequest.AirManualImageRequest(),
 
             // Air Continuous
-            '/air/continuous/dashboard': (context) => AirContinuousDashboard(),
+            '/air/continuous/info': (context) => const AirContinuousInfoCentreDocument(),
             '/air/continuous/overview': (context) => airContinuousOverview.OverviewScreen(),
             '/air/continuous/entry': (context) => airContinuousEntry.EntryScreen(),
             '/air/continuous/report': (context) => airContinuousReport.ReportScreen(),
 
             // Air Investigative
-            '/air/investigative/dashboard': (context) => AirInvestigativeDashboard(),
+            '/air/investigative/info': (context) => const AirInvestigativeInfoCentreDocument(),
             '/air/investigative/overview': (context) => airInvestigativeOverview.OverviewScreen(),
             '/air/investigative/entry': (context) => airInvestigativeEntry.EntryScreen(),
             '/air/investigative/report': (context) => airInvestigativeReport.ReportScreen(),
 
             // River Manual
-            '/river/manual/dashboard': (context) => RiverManualDashboard(),
+            '/river/manual/info': (context) => const RiverManualInfoCentreDocument(),
             '/river/manual/in-situ': (context) => riverManualInSituSampling.RiverInSituSamplingScreen(),
             '/river/manual/report': (context) => riverManualReport.RiverManualReport(),
             '/river/manual/triennial': (context) => riverManualTriennialSampling.RiverTriennialSampling(),
@@ -229,19 +224,18 @@ class RootApp extends StatelessWidget {
             '/river/manual/image-request': (context) => riverManualImageRequest.RiverManualImageRequest(),
 
             // River Continuous
-            '/river/continuous/dashboard': (context) => RiverContinuousDashboard(),
+            '/river/continuous/info': (context) => const RiverContinuousInfoCentreDocument(),
             '/river/continuous/overview': (context) => riverContinuousOverview.OverviewScreen(),
             '/river/continuous/entry': (context) => riverContinuousEntry.EntryScreen(),
             '/river/continuous/report': (context) => riverContinuousReport.ReportScreen(),
 
             // River Investigative
-            '/river/investigative/dashboard': (context) => RiverInvestigativeDashboard(),
+            '/river/investigative/info': (context) => const RiverInvestigativeInfoCentreDocument(),
             '/river/investigative/overview': (context) => riverInvestigativeOverview.OverviewScreen(),
             '/river/investigative/entry': (context) => riverInvestigativeEntry.EntryScreen(),
             '/river/investigative/report': (context) => riverInvestigativeReport.ReportScreen(),
 
             // Marine Manual
-            '/marine/manual/dashboard': (context) => MarineManualDashboard(),
             '/marine/manual/info': (context) => marineManualInfoCentreDocument.MarineInfoCentreDocument(),
             '/marine/manual/pre-sampling': (context) => marineManualPreSampling.MarinePreSampling(),
             '/marine/manual/in-situ': (context) => marineManualInSituSampling.MarineInSituSampling(),
@@ -251,13 +245,13 @@ class RootApp extends StatelessWidget {
             '/marine/manual/image-request': (context) => marineManualImageRequest.MarineManualImageRequest(),
 
             // Marine Continuous
-            '/marine/continuous/dashboard': (context) => MarineContinuousDashboard(),
+            '/marine/continuous/info': (context) => const MarineContinuousInfoCentreDocument(),
             '/marine/continuous/overview': (context) => marineContinuousOverview.OverviewScreen(),
             '/marine/continuous/entry': (context) => marineContinuousEntry.EntryScreen(),
             '/marine/continuous/report': (context) => marineContinuousReport.ReportScreen(),
 
             // Marine Investigative
-            '/marine/investigative/dashboard': (context) => MarineInvestigativeDashboard(),
+            '/marine/investigative/info': (context) => const MarineInvestigativeInfoCentreDocument(),
             '/marine/investigative/overview': (context) => marineInvestigativeOverview.OverviewScreen(),
             '/marine/investigative/entry': (context) => marineInvestigativeEntry.EntryScreen(),
             '/marine/investigative/report': (context) => marineInvestigativeReport.ReportScreen(),
@@ -273,14 +267,20 @@ class SplashScreen extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return const Scaffold(
+    return Scaffold(
       body: Center(
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            CircularProgressIndicator(),
+            Image.asset(
-            SizedBox(height: 20),
+              'assets/icon4.png',
-            Text('Loading app data...', style: TextStyle(fontSize: 16)),
+              height: 360,
+              width: 360,
+            ),
+            const SizedBox(height: 24),
+            const CircularProgressIndicator(),
+            const SizedBox(height: 20),
+            const Text('Loading app data...', style: TextStyle(fontSize: 16)),
           ],
         ),
       ),

lib/screens/air/air_home_page.dart

@@ -1,3 +1,5 @@
+//lib/screens/river/air_home_page.dart
+
 import 'package:flutter/material.dart';
 
 // Re-defining SidebarItem here for self-containment,
@@ -30,12 +32,12 @@ class AirHomePage extends StatelessWidget {
       label: "Manual",
       isParent: true,
       children: [
-        //SidebarItem(icon: Icons.dashboard, label: "Dashboard", route: '/air/manual/dashboard'),
+        // MODIFIED: Added Info Centre Document link for consistency
+        SidebarItem(icon: Icons.description, label: "Info Centre Document", route: '/air/manual/info'),
         SidebarItem(icon: Icons.construction, label: "Installation", route: '/air/manual/installation'),
         SidebarItem(icon: Icons.inventory_2, label: "Collection", route: '/air/manual/collection'),
-        //SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/air/manual/report'),
         SidebarItem(icon: Icons.article, label: "Data Log", route: '/air/manual/data-log'),
-        SidebarItem(icon: Icons.image, label: "Image Request", route: '/air/manual/image-request'),
+        //SidebarItem(icon: Icons.image, label: "Image Request", route: '/air/manual/image-request'),
       ],
     ),
     SidebarItem(
@@ -43,10 +45,11 @@ class AirHomePage extends StatelessWidget {
       label: "Continuous",
       isParent: true,
       children: [
-        SidebarItem(icon: Icons.dashboard, label: "Dashboard", route: '/air/continuous/dashboard'),
+        // MODIFIED: Updated to point to the new Info Centre screen
-        SidebarItem(icon: Icons.info, label: "Overview", route: '/air/continuous/overview'),
+        SidebarItem(icon: Icons.description, label: "Info Centre Document", route: '/air/continuous/info'),
-        SidebarItem(icon: Icons.input, label: "Entry", route: '/air/continuous/entry'),
+        //SidebarItem(icon: Icons.info, label: "Overview", route: '/air/continuous/overview'),
-        SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/air/continuous/report'),
+        //SidebarItem(icon: Icons.input, label: "Entry", route: '/air/continuous/entry'),
+        //SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/air/continuous/report'),
       ],
     ),
     SidebarItem(
@@ -54,10 +57,11 @@ class AirHomePage extends StatelessWidget {
       label: "Investigative",
       isParent: true,
       children: [
-        SidebarItem(icon: Icons.dashboard, label: "Dashboard", route: '/air/investigative/dashboard'),
+        // MODIFIED: Updated to point to the new Info Centre screen
-        SidebarItem(icon: Icons.info, label: "Overview", route: '/air/investigative/overview'),
+        SidebarItem(icon: Icons.description, label: "Info Centre Document", route: '/air/investigative/info'),
-        SidebarItem(icon: Icons.input, label: "Entry", route: '/air/investigative/entry'),
+        //SidebarItem(icon: Icons.info, label: "Overview", route: '/air/investigative/overview'),
-        SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/air/investigative/report'),
+        //SidebarItem(icon: Icons.input, label: "Entry", route: '/air/investigative/entry'),
+        //SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/air/investigative/report'),
       ],
     ),
   ];

lib/screens/air/continuous/air_continuous_dashboard.dart

@@ -1,42 +0,0 @@
-import 'package:flutter/material.dart';
-
-class AirContinuousDashboard extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text("Air Continuous Monitoring")),
-      body: Padding(
-        padding: const EdgeInsets.all(24),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text("Continuous Monitoring", style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
-            SizedBox(height: 24),
-            Wrap(
-              spacing: 16,
-              runSpacing: 16,
-              children: [
-                _buildNavButton(context, "Overview", Icons.info, '/air/continuous/overview'),
-                _buildNavButton(context, "Entry", Icons.edit, '/air/continuous/entry'),
-                _buildNavButton(context, "Report", Icons.insert_chart, '/air/continuous/report'),
-              ],
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Widget _buildNavButton(BuildContext context, String label, IconData icon, String route) {
-    return ElevatedButton.icon(
-      onPressed: () => Navigator.pushNamed(context, route),
-      icon: Icon(icon),
-      label: Text(label),
-      style: ElevatedButton.styleFrom(
-        padding: EdgeInsets.symmetric(horizontal: 24, vertical: 16),
-        backgroundColor: Colors.blue[800],
-        foregroundColor: Colors.white,
-      ),
-    );
-  }
-}

lib/screens/air/continuous/air_continuous_info_centre_document.dart

@@ -0,0 +1,272 @@
+//lib/screens/air/continuous/air_continuous_info_centre_document.dart
+
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
+import 'package:environment_monitoring_app/services/local_storage_service.dart';
+import '../../../auth_provider.dart';
+
+// This model is used generically across departments
+class MarineDocument {
+  final int id;
+  final String title;
+  final String module;
+  final String? group;
+  final String url;
+  final String? departmentName;
+
+  MarineDocument({
+    required this.id,
+    required this.title,
+    required this.module,
+    this.group,
+    required this.url,
+    this.departmentName,
+  });
+
+  factory MarineDocument.fromMap(Map<String, dynamic> map) {
+    return MarineDocument(
+      id: map['id'],
+      title: map['title'],
+      module: map['module'],
+      group: map['group'],
+      url: map['url'],
+      departmentName: map['department_name'],
+    );
+  }
+}
+
+class AirContinuousInfoCentreDocument extends StatefulWidget {
+  const AirContinuousInfoCentreDocument({super.key});
+
+  @override
+  State<AirContinuousInfoCentreDocument> createState() => _AirContinuousInfoCentreDocumentState();
+}
+
+class _AirContinuousInfoCentreDocumentState extends State<AirContinuousInfoCentreDocument> {
+  final LocalStorageService _localStorageService = LocalStorageService();
+  late List<MarineDocument> _documents;
+
+  List<String> _documentGroups = [];
+  String? _selectedGroup;
+
+  Set<String> _downloadedUrls = {};
+  Map<String, double> _downloadProgress = {};
+
+  @override
+  void initState() {
+    super.initState();
+    _documents = _getFilteredDocumentsFromProvider();
+    final groups = _documents.map((doc) => doc.group ?? 'Uncategorized').toSet().toList();
+    _documentGroups = ['All Documents', ...groups];
+    _selectedGroup = _documentGroups.first;
+    _checkInitialDownloadStatus();
+  }
+
+  List<MarineDocument> _getFilteredDocumentsFromProvider() {
+    final documentsData = Provider.of<AuthProvider>(context, listen: false).documents;
+    if (documentsData == null || documentsData.isEmpty) {
+      return [];
+    }
+
+    var allDocuments = documentsData.map((map) => MarineDocument.fromMap(map)).toList();
+
+    return allDocuments.where((doc) {
+      return doc.departmentName == 'Air' && doc.module == 'Continuous';
+    }).toList();
+  }
+
+  Future<void> _checkInitialDownloadStatus() async {
+    final downloaded = <String>{};
+    for (var doc in _documents) {
+      if (await _localStorageService.isDocumentDownloaded(doc.url)) {
+        downloaded.add(doc.url);
+      }
+    }
+    if (mounted) {
+      setState(() {
+        _downloadedUrls = downloaded;
+      });
+    }
+  }
+
+  Future<void> _handleDownload(MarineDocument doc) async {
+    setState(() {
+      _downloadProgress[doc.url] = 0.0;
+    });
+
+    try {
+      await _localStorageService.downloadDocument(
+        docUrl: doc.url,
+        onReceiveProgress: (progress) {
+          if (mounted) {
+            setState(() {
+              _downloadProgress[doc.url] = progress;
+            });
+          }
+        },
+      );
+      if (mounted) {
+        setState(() {
+          _downloadedUrls.add(doc.url);
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Download failed for ${doc.title}')),
+        );
+        setState(() {
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    }
+  }
+
+  Future<void> _viewDocument(MarineDocument doc) async {
+    final localPath = await _localStorageService.getLocalDocumentPath(doc.url);
+    if (localPath != null && mounted) {
+      Navigator.push(
+        context,
+        MaterialPageRoute(
+          builder: (context) => PdfViewerScreen(
+            filePath: localPath,
+            title: doc.title,
+          ),
+        ),
+      );
+    }
+  }
+
+  Widget _buildTrailingWidget(MarineDocument doc) {
+    if (_downloadProgress.containsKey(doc.url)) {
+      return SizedBox(
+        width: 24,
+        height: 24,
+        child: CircularProgressIndicator(
+          value: _downloadProgress[doc.url],
+          strokeWidth: 3,
+        ),
+      );
+    }
+
+    if (_downloadedUrls.contains(doc.url)) {
+      return IconButton(
+        icon: const Icon(Icons.visibility, color: Colors.green),
+        tooltip: 'View Document',
+        onPressed: () => _viewDocument(doc),
+      );
+    }
+
+    return IconButton(
+      icon: const Icon(Icons.download_for_offline, color: Colors.blueAccent),
+      tooltip: 'Download for Offline',
+      onPressed: () => _handleDownload(doc),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final filteredDocs = _selectedGroup == 'All Documents'
+        ? _documents
+        : _documents.where((doc) => (doc.group ?? 'Uncategorized') == _selectedGroup).toList();
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("Air Continuous Documents"),
+      ),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            DropdownButtonFormField<String>(
+              value: _selectedGroup,
+              decoration: InputDecoration(
+                labelText: 'Filter by Group',
+                border: OutlineInputBorder(
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+              ),
+              items: _documentGroups.map((String group) {
+                return DropdownMenuItem<String>(
+                  value: group,
+                  child: Text(group),
+                );
+              }).toList(),
+              onChanged: (newValue) {
+                setState(() {
+                  _selectedGroup = newValue;
+                });
+              },
+            ),
+            const SizedBox(height: 20),
+            Text(
+              _selectedGroup!,
+              style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
+            ),
+            const Divider(height: 20),
+            Expanded(
+              child: _documents.isEmpty
+                  ? const Center(child: Text("No Air Continuous documents found."))
+                  : ListView.builder(
+                itemCount: filteredDocs.length,
+                itemBuilder: (context, index) {
+                  final doc = filteredDocs[index];
+                  return Card(
+                    elevation: 2.0,
+                    margin: const EdgeInsets.symmetric(vertical: 6.0),
+                    shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(12),
+                    ),
+                    child: ListTile(
+                      leading: CircleAvatar(
+                        backgroundColor: Colors.red.shade100,
+                        child: const Icon(Icons.picture_as_pdf, color: Colors.redAccent),
+                      ),
+                      title: Text(doc.title),
+                      trailing: _buildTrailingWidget(doc),
+                      onTap: _downloadedUrls.contains(doc.url)
+                          ? () => _viewDocument(doc)
+                          : null,
+                    ),
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class PdfViewerScreen extends StatelessWidget {
+  final String filePath;
+  final String title;
+
+  const PdfViewerScreen({
+    super.key,
+    required this.filePath,
+    required this.title,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+      ),
+      body: PDFView(
+        filePath: filePath,
+        enableSwipe: true,
+        swipeHorizontal: false,
+        autoSpacing: false,
+        pageFling: false,
+      ),
+    );
+  }
+}

lib/screens/air/investigative/air_investigative_dashboard.dart

@@ -1,42 +0,0 @@
-import 'package:flutter/material.dart';
-
-class AirInvestigativeDashboard extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text("Air Investigative Study")),
-      body: Padding(
-        padding: const EdgeInsets.all(24),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text("Investigative Study", style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
-            SizedBox(height: 24),
-            Wrap(
-              spacing: 16,
-              runSpacing: 16,
-              children: [
-                _buildNavButton(context, "Overview", Icons.info, '/air/investigative/overview'),
-                _buildNavButton(context, "Entry", Icons.edit, '/air/investigative/entry'),
-                _buildNavButton(context, "Report", Icons.insert_chart, '/air/investigative/report'),
-              ],
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Widget _buildNavButton(BuildContext context, String label, IconData icon, String route) {
-    return ElevatedButton.icon(
-      onPressed: () => Navigator.pushNamed(context, route),
-      icon: Icon(icon),
-      label: Text(label),
-      style: ElevatedButton.styleFrom(
-        padding: EdgeInsets.symmetric(horizontal: 24, vertical: 16),
-        backgroundColor: Colors.blue[800],
-        foregroundColor: Colors.white,
-      ),
-    );
-  }
-}

lib/screens/air/investigative/air_investigative_info_centre_document.dart

@@ -0,0 +1,272 @@
+//lib/screens/air/investigative/air_investigative_info_centre_document.dart
+
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
+import 'package:environment_monitoring_app/services/local_storage_service.dart';
+import '../../../auth_provider.dart';
+
+// This model is used generically across departments
+class MarineDocument {
+  final int id;
+  final String title;
+  final String module;
+  final String? group;
+  final String url;
+  final String? departmentName;
+
+  MarineDocument({
+    required this.id,
+    required this.title,
+    required this.module,
+    this.group,
+    required this.url,
+    this.departmentName,
+  });
+
+  factory MarineDocument.fromMap(Map<String, dynamic> map) {
+    return MarineDocument(
+      id: map['id'],
+      title: map['title'],
+      module: map['module'],
+      group: map['group'],
+      url: map['url'],
+      departmentName: map['department_name'],
+    );
+  }
+}
+
+class AirInvestigativeInfoCentreDocument extends StatefulWidget {
+  const AirInvestigativeInfoCentreDocument({super.key});
+
+  @override
+  State<AirInvestigativeInfoCentreDocument> createState() => _AirInvestigativeInfoCentreDocumentState();
+}
+
+class _AirInvestigativeInfoCentreDocumentState extends State<AirInvestigativeInfoCentreDocument> {
+  final LocalStorageService _localStorageService = LocalStorageService();
+  late List<MarineDocument> _documents;
+
+  List<String> _documentGroups = [];
+  String? _selectedGroup;
+
+  Set<String> _downloadedUrls = {};
+  Map<String, double> _downloadProgress = {};
+
+  @override
+  void initState() {
+    super.initState();
+    _documents = _getFilteredDocumentsFromProvider();
+    final groups = _documents.map((doc) => doc.group ?? 'Uncategorized').toSet().toList();
+    _documentGroups = ['All Documents', ...groups];
+    _selectedGroup = _documentGroups.first;
+    _checkInitialDownloadStatus();
+  }
+
+  List<MarineDocument> _getFilteredDocumentsFromProvider() {
+    final documentsData = Provider.of<AuthProvider>(context, listen: false).documents;
+    if (documentsData == null || documentsData.isEmpty) {
+      return [];
+    }
+
+    var allDocuments = documentsData.map((map) => MarineDocument.fromMap(map)).toList();
+
+    return allDocuments.where((doc) {
+      return doc.departmentName == 'Air' && doc.module == 'Investigative';
+    }).toList();
+  }
+
+  Future<void> _checkInitialDownloadStatus() async {
+    final downloaded = <String>{};
+    for (var doc in _documents) {
+      if (await _localStorageService.isDocumentDownloaded(doc.url)) {
+        downloaded.add(doc.url);
+      }
+    }
+    if (mounted) {
+      setState(() {
+        _downloadedUrls = downloaded;
+      });
+    }
+  }
+
+  Future<void> _handleDownload(MarineDocument doc) async {
+    setState(() {
+      _downloadProgress[doc.url] = 0.0;
+    });
+
+    try {
+      await _localStorageService.downloadDocument(
+        docUrl: doc.url,
+        onReceiveProgress: (progress) {
+          if (mounted) {
+            setState(() {
+              _downloadProgress[doc.url] = progress;
+            });
+          }
+        },
+      );
+      if (mounted) {
+        setState(() {
+          _downloadedUrls.add(doc.url);
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Download failed for ${doc.title}')),
+        );
+        setState(() {
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    }
+  }
+
+  Future<void> _viewDocument(MarineDocument doc) async {
+    final localPath = await _localStorageService.getLocalDocumentPath(doc.url);
+    if (localPath != null && mounted) {
+      Navigator.push(
+        context,
+        MaterialPageRoute(
+          builder: (context) => PdfViewerScreen(
+            filePath: localPath,
+            title: doc.title,
+          ),
+        ),
+      );
+    }
+  }
+
+  Widget _buildTrailingWidget(MarineDocument doc) {
+    if (_downloadProgress.containsKey(doc.url)) {
+      return SizedBox(
+        width: 24,
+        height: 24,
+        child: CircularProgressIndicator(
+          value: _downloadProgress[doc.url],
+          strokeWidth: 3,
+        ),
+      );
+    }
+
+    if (_downloadedUrls.contains(doc.url)) {
+      return IconButton(
+        icon: const Icon(Icons.visibility, color: Colors.green),
+        tooltip: 'View Document',
+        onPressed: () => _viewDocument(doc),
+      );
+    }
+
+    return IconButton(
+      icon: const Icon(Icons.download_for_offline, color: Colors.blueAccent),
+      tooltip: 'Download for Offline',
+      onPressed: () => _handleDownload(doc),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final filteredDocs = _selectedGroup == 'All Documents'
+        ? _documents
+        : _documents.where((doc) => (doc.group ?? 'Uncategorized') == _selectedGroup).toList();
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("Air Investigative Documents"),
+      ),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            DropdownButtonFormField<String>(
+              value: _selectedGroup,
+              decoration: InputDecoration(
+                labelText: 'Filter by Group',
+                border: OutlineInputBorder(
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+              ),
+              items: _documentGroups.map((String group) {
+                return DropdownMenuItem<String>(
+                  value: group,
+                  child: Text(group),
+                );
+              }).toList(),
+              onChanged: (newValue) {
+                setState(() {
+                  _selectedGroup = newValue;
+                });
+              },
+            ),
+            const SizedBox(height: 20),
+            Text(
+              _selectedGroup!,
+              style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
+            ),
+            const Divider(height: 20),
+            Expanded(
+              child: _documents.isEmpty
+                  ? const Center(child: Text("No Air Investigative documents found."))
+                  : ListView.builder(
+                itemCount: filteredDocs.length,
+                itemBuilder: (context, index) {
+                  final doc = filteredDocs[index];
+                  return Card(
+                    elevation: 2.0,
+                    margin: const EdgeInsets.symmetric(vertical: 6.0),
+                    shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(12),
+                    ),
+                    child: ListTile(
+                      leading: CircleAvatar(
+                        backgroundColor: Colors.red.shade100,
+                        child: const Icon(Icons.picture_as_pdf, color: Colors.redAccent),
+                      ),
+                      title: Text(doc.title),
+                      trailing: _buildTrailingWidget(doc),
+                      onTap: _downloadedUrls.contains(doc.url)
+                          ? () => _viewDocument(doc)
+                          : null,
+                    ),
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class PdfViewerScreen extends StatelessWidget {
+  final String filePath;
+  final String title;
+
+  const PdfViewerScreen({
+    super.key,
+    required this.filePath,
+    required this.title,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+      ),
+      body: PDFView(
+        filePath: filePath,
+        enableSwipe: true,
+        swipeHorizontal: false,
+        autoSpacing: false,
+        pageFling: false,
+      ),
+    );
+  }
+}

lib/screens/air/manual/air_manual_dashboard.dart

@@ -1,42 +0,0 @@
-import 'package:flutter/material.dart';
-
-class AirManualDashboard extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text("Air Manual Sampling")),
-      body: Padding(
-        padding: const EdgeInsets.all(24),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text("Manual Sampling", style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
-            SizedBox(height: 24),
-            Wrap(
-              spacing: 16,
-              runSpacing: 16,
-              children: [
-                _buildNavButton(context, "Overview", Icons.info, '/air/manual/overview'),
-                _buildNavButton(context, "Entry", Icons.edit, '/air/manual/entry'),
-                _buildNavButton(context, "Report", Icons.insert_chart, '/air/manual/report'),
-              ],
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Widget _buildNavButton(BuildContext context, String label, IconData icon, String route) {
-    return ElevatedButton.icon(
-      onPressed: () => Navigator.pushNamed(context, route),
-      icon: Icon(icon),
-      label: Text(label),
-      style: ElevatedButton.styleFrom(
-        padding: EdgeInsets.symmetric(horizontal: 24, vertical: 16),
-        backgroundColor: Colors.blue[800],
-        foregroundColor: Colors.white,
-      ),
-    );
-  }
-}

lib/screens/air/manual/air_manual_info_centre_document.dart

@@ -0,0 +1,272 @@
+//lib/screens/air/manual/air_manual_info_centre_document.dart
+
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
+import 'package:environment_monitoring_app/services/local_storage_service.dart';
+import '../../../auth_provider.dart';
+
+// This model is used generically across departments
+class MarineDocument {
+  final int id;
+  final String title;
+  final String module;
+  final String? group;
+  final String url;
+  final String? departmentName;
+
+  MarineDocument({
+    required this.id,
+    required this.title,
+    required this.module,
+    this.group,
+    required this.url,
+    this.departmentName,
+  });
+
+  factory MarineDocument.fromMap(Map<String, dynamic> map) {
+    return MarineDocument(
+      id: map['id'],
+      title: map['title'],
+      module: map['module'],
+      group: map['group'],
+      url: map['url'],
+      departmentName: map['department_name'],
+    );
+  }
+}
+
+class AirManualInfoCentreDocument extends StatefulWidget {
+  const AirManualInfoCentreDocument({super.key});
+
+  @override
+  State<AirManualInfoCentreDocument> createState() => _AirManualInfoCentreDocumentState();
+}
+
+class _AirManualInfoCentreDocumentState extends State<AirManualInfoCentreDocument> {
+  final LocalStorageService _localStorageService = LocalStorageService();
+  late List<MarineDocument> _documents;
+
+  List<String> _documentGroups = [];
+  String? _selectedGroup;
+
+  Set<String> _downloadedUrls = {};
+  Map<String, double> _downloadProgress = {};
+
+  @override
+  void initState() {
+    super.initState();
+    _documents = _getFilteredDocumentsFromProvider();
+    final groups = _documents.map((doc) => doc.group ?? 'Uncategorized').toSet().toList();
+    _documentGroups = ['All Documents', ...groups];
+    _selectedGroup = _documentGroups.first;
+    _checkInitialDownloadStatus();
+  }
+
+  List<MarineDocument> _getFilteredDocumentsFromProvider() {
+    final documentsData = Provider.of<AuthProvider>(context, listen: false).documents;
+    if (documentsData == null || documentsData.isEmpty) {
+      return [];
+    }
+
+    var allDocuments = documentsData.map((map) => MarineDocument.fromMap(map)).toList();
+
+    return allDocuments.where((doc) {
+      return doc.departmentName == 'Air' && doc.module == 'Manual';
+    }).toList();
+  }
+
+  Future<void> _checkInitialDownloadStatus() async {
+    final downloaded = <String>{};
+    for (var doc in _documents) {
+      if (await _localStorageService.isDocumentDownloaded(doc.url)) {
+        downloaded.add(doc.url);
+      }
+    }
+    if (mounted) {
+      setState(() {
+        _downloadedUrls = downloaded;
+      });
+    }
+  }
+
+  Future<void> _handleDownload(MarineDocument doc) async {
+    setState(() {
+      _downloadProgress[doc.url] = 0.0;
+    });
+
+    try {
+      await _localStorageService.downloadDocument(
+        docUrl: doc.url,
+        onReceiveProgress: (progress) {
+          if (mounted) {
+            setState(() {
+              _downloadProgress[doc.url] = progress;
+            });
+          }
+        },
+      );
+      if (mounted) {
+        setState(() {
+          _downloadedUrls.add(doc.url);
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Download failed for ${doc.title}')),
+        );
+        setState(() {
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    }
+  }
+
+  Future<void> _viewDocument(MarineDocument doc) async {
+    final localPath = await _localStorageService.getLocalDocumentPath(doc.url);
+    if (localPath != null && mounted) {
+      Navigator.push(
+        context,
+        MaterialPageRoute(
+          builder: (context) => PdfViewerScreen(
+            filePath: localPath,
+            title: doc.title,
+          ),
+        ),
+      );
+    }
+  }
+
+  Widget _buildTrailingWidget(MarineDocument doc) {
+    if (_downloadProgress.containsKey(doc.url)) {
+      return SizedBox(
+        width: 24,
+        height: 24,
+        child: CircularProgressIndicator(
+          value: _downloadProgress[doc.url],
+          strokeWidth: 3,
+        ),
+      );
+    }
+
+    if (_downloadedUrls.contains(doc.url)) {
+      return IconButton(
+        icon: const Icon(Icons.visibility, color: Colors.green),
+        tooltip: 'View Document',
+        onPressed: () => _viewDocument(doc),
+      );
+    }
+
+    return IconButton(
+      icon: const Icon(Icons.download_for_offline, color: Colors.blueAccent),
+      tooltip: 'Download for Offline',
+      onPressed: () => _handleDownload(doc),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final filteredDocs = _selectedGroup == 'All Documents'
+        ? _documents
+        : _documents.where((doc) => (doc.group ?? 'Uncategorized') == _selectedGroup).toList();
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("Air Manual Documents"),
+      ),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            DropdownButtonFormField<String>(
+              value: _selectedGroup,
+              decoration: InputDecoration(
+                labelText: 'Filter by Group',
+                border: OutlineInputBorder(
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+              ),
+              items: _documentGroups.map((String group) {
+                return DropdownMenuItem<String>(
+                  value: group,
+                  child: Text(group),
+                );
+              }).toList(),
+              onChanged: (newValue) {
+                setState(() {
+                  _selectedGroup = newValue;
+                });
+              },
+            ),
+            const SizedBox(height: 20),
+            Text(
+              _selectedGroup!,
+              style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
+            ),
+            const Divider(height: 20),
+            Expanded(
+              child: _documents.isEmpty
+                  ? const Center(child: Text("No Air Manual documents found."))
+                  : ListView.builder(
+                itemCount: filteredDocs.length,
+                itemBuilder: (context, index) {
+                  final doc = filteredDocs[index];
+                  return Card(
+                    elevation: 2.0,
+                    margin: const EdgeInsets.symmetric(vertical: 6.0),
+                    shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(12),
+                    ),
+                    child: ListTile(
+                      leading: CircleAvatar(
+                        backgroundColor: Colors.red.shade100,
+                        child: const Icon(Icons.picture_as_pdf, color: Colors.redAccent),
+                      ),
+                      title: Text(doc.title),
+                      trailing: _buildTrailingWidget(doc),
+                      onTap: _downloadedUrls.contains(doc.url)
+                          ? () => _viewDocument(doc)
+                          : null,
+                    ),
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class PdfViewerScreen extends StatelessWidget {
+  final String filePath;
+  final String title;
+
+  const PdfViewerScreen({
+    super.key,
+    required this.filePath,
+    required this.title,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+      ),
+      body: PDFView(
+        filePath: filePath,
+        enableSwipe: true,
+        swipeHorizontal: false,
+        autoSpacing: false,
+        pageFling: false,
+      ),
+    );
+  }
+}

lib/screens/marine/continuous/marine_continuous_dashboard.dart

@@ -1,42 +0,0 @@
-import 'package:flutter/material.dart';
-
-class MarineContinuousDashboard extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text("Marine Continuous Monitoring")),
-      body: Padding(
-        padding: const EdgeInsets.all(24),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text("Continuous Monitoring", style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
-            SizedBox(height: 24),
-            Wrap(
-              spacing: 16,
-              runSpacing: 16,
-              children: [
-                _buildNavButton(context, "Overview", Icons.info, '/marine/continuous/overview'),
-                _buildNavButton(context, "Entry", Icons.edit, '/marine/continuous/entry'),
-                _buildNavButton(context, "Report", Icons.insert_chart, '/marine/continuous/report'),
-              ],
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Widget _buildNavButton(BuildContext context, String label, IconData icon, String route) {
-    return ElevatedButton.icon(
-      onPressed: () => Navigator.pushNamed(context, route),
-      icon: Icon(icon),
-      label: Text(label),
-      style: ElevatedButton.styleFrom(
-        padding: EdgeInsets.symmetric(horizontal: 24, vertical: 16),
-        backgroundColor: Colors.blue[800],
-        foregroundColor: Colors.white,
-      ),
-    );
-  }
-}

lib/screens/marine/continuous/marine_continuous_info_centre_document.dart

@@ -0,0 +1,272 @@
+//lib/screens/marine/continuous/marine_continuous_info_centre_document.dart
+
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
+import 'package:environment_monitoring_app/services/local_storage_service.dart';
+import '../../../auth_provider.dart';
+
+// This model is used generically across departments
+class MarineDocument {
+  final int id;
+  final String title;
+  final String module;
+  final String? group;
+  final String url;
+  final String? departmentName;
+
+  MarineDocument({
+    required this.id,
+    required this.title,
+    required this.module,
+    this.group,
+    required this.url,
+    this.departmentName,
+  });
+
+  factory MarineDocument.fromMap(Map<String, dynamic> map) {
+    return MarineDocument(
+      id: map['id'],
+      title: map['title'],
+      module: map['module'],
+      group: map['group'],
+      url: map['url'],
+      departmentName: map['department_name'],
+    );
+  }
+}
+
+class MarineContinuousInfoCentreDocument extends StatefulWidget {
+  const MarineContinuousInfoCentreDocument({super.key});
+
+  @override
+  State<MarineContinuousInfoCentreDocument> createState() => _MarineContinuousInfoCentreDocumentState();
+}
+
+class _MarineContinuousInfoCentreDocumentState extends State<MarineContinuousInfoCentreDocument> {
+  final LocalStorageService _localStorageService = LocalStorageService();
+  late List<MarineDocument> _documents;
+
+  List<String> _documentGroups = [];
+  String? _selectedGroup;
+
+  Set<String> _downloadedUrls = {};
+  Map<String, double> _downloadProgress = {};
+
+  @override
+  void initState() {
+    super.initState();
+    _documents = _getFilteredDocumentsFromProvider();
+    final groups = _documents.map((doc) => doc.group ?? 'Uncategorized').toSet().toList();
+    _documentGroups = ['All Documents', ...groups];
+    _selectedGroup = _documentGroups.first;
+    _checkInitialDownloadStatus();
+  }
+
+  List<MarineDocument> _getFilteredDocumentsFromProvider() {
+    final documentsData = Provider.of<AuthProvider>(context, listen: false).documents;
+    if (documentsData == null || documentsData.isEmpty) {
+      return [];
+    }
+
+    var allDocuments = documentsData.map((map) => MarineDocument.fromMap(map)).toList();
+
+    return allDocuments.where((doc) {
+      return doc.departmentName == 'Marine' && doc.module == 'Continuous';
+    }).toList();
+  }
+
+  Future<void> _checkInitialDownloadStatus() async {
+    final downloaded = <String>{};
+    for (var doc in _documents) {
+      if (await _localStorageService.isDocumentDownloaded(doc.url)) {
+        downloaded.add(doc.url);
+      }
+    }
+    if (mounted) {
+      setState(() {
+        _downloadedUrls = downloaded;
+      });
+    }
+  }
+
+  Future<void> _handleDownload(MarineDocument doc) async {
+    setState(() {
+      _downloadProgress[doc.url] = 0.0;
+    });
+
+    try {
+      await _localStorageService.downloadDocument(
+        docUrl: doc.url,
+        onReceiveProgress: (progress) {
+          if (mounted) {
+            setState(() {
+              _downloadProgress[doc.url] = progress;
+            });
+          }
+        },
+      );
+      if (mounted) {
+        setState(() {
+          _downloadedUrls.add(doc.url);
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Download failed for ${doc.title}')),
+        );
+        setState(() {
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    }
+  }
+
+  Future<void> _viewDocument(MarineDocument doc) async {
+    final localPath = await _localStorageService.getLocalDocumentPath(doc.url);
+    if (localPath != null && mounted) {
+      Navigator.push(
+        context,
+        MaterialPageRoute(
+          builder: (context) => PdfViewerScreen(
+            filePath: localPath,
+            title: doc.title,
+          ),
+        ),
+      );
+    }
+  }
+
+  Widget _buildTrailingWidget(MarineDocument doc) {
+    if (_downloadProgress.containsKey(doc.url)) {
+      return SizedBox(
+        width: 24,
+        height: 24,
+        child: CircularProgressIndicator(
+          value: _downloadProgress[doc.url],
+          strokeWidth: 3,
+        ),
+      );
+    }
+
+    if (_downloadedUrls.contains(doc.url)) {
+      return IconButton(
+        icon: const Icon(Icons.visibility, color: Colors.green),
+        tooltip: 'View Document',
+        onPressed: () => _viewDocument(doc),
+      );
+    }
+
+    return IconButton(
+      icon: const Icon(Icons.download_for_offline, color: Colors.blueAccent),
+      tooltip: 'Download for Offline',
+      onPressed: () => _handleDownload(doc),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final filteredDocs = _selectedGroup == 'All Documents'
+        ? _documents
+        : _documents.where((doc) => (doc.group ?? 'Uncategorized') == _selectedGroup).toList();
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("Marine Continuous Documents"),
+      ),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            DropdownButtonFormField<String>(
+              value: _selectedGroup,
+              decoration: InputDecoration(
+                labelText: 'Filter by Group',
+                border: OutlineInputBorder(
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+              ),
+              items: _documentGroups.map((String group) {
+                return DropdownMenuItem<String>(
+                  value: group,
+                  child: Text(group),
+                );
+              }).toList(),
+              onChanged: (newValue) {
+                setState(() {
+                  _selectedGroup = newValue;
+                });
+              },
+            ),
+            const SizedBox(height: 20),
+            Text(
+              _selectedGroup!,
+              style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
+            ),
+            const Divider(height: 20),
+            Expanded(
+              child: _documents.isEmpty
+                  ? const Center(child: Text("No Marine Continuous documents found."))
+                  : ListView.builder(
+                itemCount: filteredDocs.length,
+                itemBuilder: (context, index) {
+                  final doc = filteredDocs[index];
+                  return Card(
+                    elevation: 2.0,
+                    margin: const EdgeInsets.symmetric(vertical: 6.0),
+                    shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(12),
+                    ),
+                    child: ListTile(
+                      leading: CircleAvatar(
+                        backgroundColor: Colors.red.shade100,
+                        child: const Icon(Icons.picture_as_pdf, color: Colors.redAccent),
+                      ),
+                      title: Text(doc.title),
+                      trailing: _buildTrailingWidget(doc),
+                      onTap: _downloadedUrls.contains(doc.url)
+                          ? () => _viewDocument(doc)
+                          : null,
+                    ),
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class PdfViewerScreen extends StatelessWidget {
+  final String filePath;
+  final String title;
+
+  const PdfViewerScreen({
+    super.key,
+    required this.filePath,
+    required this.title,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+      ),
+      body: PDFView(
+        filePath: filePath,
+        enableSwipe: true,
+        swipeHorizontal: false,
+        autoSpacing: false,
+        pageFling: false,
+      ),
+    );
+  }
+}

lib/screens/marine/investigative/marine_investigative_dashboard.dart

@@ -1,42 +0,0 @@
-import 'package:flutter/material.dart';
-
-class MarineInvestigativeDashboard extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text("Marine Investigative Study")),
-      body: Padding(
-        padding: const EdgeInsets.all(24),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text("Investigative Study", style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
-            SizedBox(height: 24),
-            Wrap(
-              spacing: 16,
-              runSpacing: 16,
-              children: [
-                _buildNavButton(context, "Overview", Icons.info, '/marine/investigative/overview'),
-                _buildNavButton(context, "Entry", Icons.edit, '/marine/investigative/entry'),
-                _buildNavButton(context, "Report", Icons.insert_chart, '/marine/investigative/report'),
-              ],
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Widget _buildNavButton(BuildContext context, String label, IconData icon, String route) {
-    return ElevatedButton.icon(
-      onPressed: () => Navigator.pushNamed(context, route),
-      icon: Icon(icon),
-      label: Text(label),
-      style: ElevatedButton.styleFrom(
-        padding: EdgeInsets.symmetric(horizontal: 24, vertical: 16),
-        backgroundColor: Colors.blue[800],
-        foregroundColor: Colors.white,
-      ),
-    );
-  }
-}

lib/screens/marine/investigative/marine_investigative_info_centre_document.dart

@@ -0,0 +1,272 @@
+//lib/screens/marine/investigative/marine_investigative_info_centre_document.dart
+
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
+import 'package:environment_monitoring_app/services/local_storage_service.dart';
+import '../../../auth_provider.dart';
+
+// This model is used generically across departments
+class MarineDocument {
+  final int id;
+  final String title;
+  final String module;
+  final String? group;
+  final String url;
+  final String? departmentName;
+
+  MarineDocument({
+    required this.id,
+    required this.title,
+    required this.module,
+    this.group,
+    required this.url,
+    this.departmentName,
+  });
+
+  factory MarineDocument.fromMap(Map<String, dynamic> map) {
+    return MarineDocument(
+      id: map['id'],
+      title: map['title'],
+      module: map['module'],
+      group: map['group'],
+      url: map['url'],
+      departmentName: map['department_name'],
+    );
+  }
+}
+
+class MarineInvestigativeInfoCentreDocument extends StatefulWidget {
+  const MarineInvestigativeInfoCentreDocument({super.key});
+
+  @override
+  State<MarineInvestigativeInfoCentreDocument> createState() => _MarineInvestigativeInfoCentreDocumentState();
+}
+
+class _MarineInvestigativeInfoCentreDocumentState extends State<MarineInvestigativeInfoCentreDocument> {
+  final LocalStorageService _localStorageService = LocalStorageService();
+  late List<MarineDocument> _documents;
+
+  List<String> _documentGroups = [];
+  String? _selectedGroup;
+
+  Set<String> _downloadedUrls = {};
+  Map<String, double> _downloadProgress = {};
+
+  @override
+  void initState() {
+    super.initState();
+    _documents = _getFilteredDocumentsFromProvider();
+    final groups = _documents.map((doc) => doc.group ?? 'Uncategorized').toSet().toList();
+    _documentGroups = ['All Documents', ...groups];
+    _selectedGroup = _documentGroups.first;
+    _checkInitialDownloadStatus();
+  }
+
+  List<MarineDocument> _getFilteredDocumentsFromProvider() {
+    final documentsData = Provider.of<AuthProvider>(context, listen: false).documents;
+    if (documentsData == null || documentsData.isEmpty) {
+      return [];
+    }
+
+    var allDocuments = documentsData.map((map) => MarineDocument.fromMap(map)).toList();
+
+    return allDocuments.where((doc) {
+      return doc.departmentName == 'Marine' && doc.module == 'Investigative';
+    }).toList();
+  }
+
+  Future<void> _checkInitialDownloadStatus() async {
+    final downloaded = <String>{};
+    for (var doc in _documents) {
+      if (await _localStorageService.isDocumentDownloaded(doc.url)) {
+        downloaded.add(doc.url);
+      }
+    }
+    if (mounted) {
+      setState(() {
+        _downloadedUrls = downloaded;
+      });
+    }
+  }
+
+  Future<void> _handleDownload(MarineDocument doc) async {
+    setState(() {
+      _downloadProgress[doc.url] = 0.0;
+    });
+
+    try {
+      await _localStorageService.downloadDocument(
+        docUrl: doc.url,
+        onReceiveProgress: (progress) {
+          if (mounted) {
+            setState(() {
+              _downloadProgress[doc.url] = progress;
+            });
+          }
+        },
+      );
+      if (mounted) {
+        setState(() {
+          _downloadedUrls.add(doc.url);
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Download failed for ${doc.title}')),
+        );
+        setState(() {
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    }
+  }
+
+  Future<void> _viewDocument(MarineDocument doc) async {
+    final localPath = await _localStorageService.getLocalDocumentPath(doc.url);
+    if (localPath != null && mounted) {
+      Navigator.push(
+        context,
+        MaterialPageRoute(
+          builder: (context) => PdfViewerScreen(
+            filePath: localPath,
+            title: doc.title,
+          ),
+        ),
+      );
+    }
+  }
+
+  Widget _buildTrailingWidget(MarineDocument doc) {
+    if (_downloadProgress.containsKey(doc.url)) {
+      return SizedBox(
+        width: 24,
+        height: 24,
+        child: CircularProgressIndicator(
+          value: _downloadProgress[doc.url],
+          strokeWidth: 3,
+        ),
+      );
+    }
+
+    if (_downloadedUrls.contains(doc.url)) {
+      return IconButton(
+        icon: const Icon(Icons.visibility, color: Colors.green),
+        tooltip: 'View Document',
+        onPressed: () => _viewDocument(doc),
+      );
+    }
+
+    return IconButton(
+      icon: const Icon(Icons.download_for_offline, color: Colors.blueAccent),
+      tooltip: 'Download for Offline',
+      onPressed: () => _handleDownload(doc),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final filteredDocs = _selectedGroup == 'All Documents'
+        ? _documents
+        : _documents.where((doc) => (doc.group ?? 'Uncategorized') == _selectedGroup).toList();
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("Marine Investigative Documents"),
+      ),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            DropdownButtonFormField<String>(
+              value: _selectedGroup,
+              decoration: InputDecoration(
+                labelText: 'Filter by Group',
+                border: OutlineInputBorder(
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+              ),
+              items: _documentGroups.map((String group) {
+                return DropdownMenuItem<String>(
+                  value: group,
+                  child: Text(group),
+                );
+              }).toList(),
+              onChanged: (newValue) {
+                setState(() {
+                  _selectedGroup = newValue;
+                });
+              },
+            ),
+            const SizedBox(height: 20),
+            Text(
+              _selectedGroup!,
+              style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
+            ),
+            const Divider(height: 20),
+            Expanded(
+              child: _documents.isEmpty
+                  ? const Center(child: Text("No Marine Investigative documents found."))
+                  : ListView.builder(
+                itemCount: filteredDocs.length,
+                itemBuilder: (context, index) {
+                  final doc = filteredDocs[index];
+                  return Card(
+                    elevation: 2.0,
+                    margin: const EdgeInsets.symmetric(vertical: 6.0),
+                    shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(12),
+                    ),
+                    child: ListTile(
+                      leading: CircleAvatar(
+                        backgroundColor: Colors.red.shade100,
+                        child: const Icon(Icons.picture_as_pdf, color: Colors.redAccent),
+                      ),
+                      title: Text(doc.title),
+                      trailing: _buildTrailingWidget(doc),
+                      onTap: _downloadedUrls.contains(doc.url)
+                          ? () => _viewDocument(doc)
+                          : null,
+                    ),
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class PdfViewerScreen extends StatelessWidget {
+  final String filePath;
+  final String title;
+
+  const PdfViewerScreen({
+    super.key,
+    required this.filePath,
+    required this.title,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+      ),
+      body: PDFView(
+        filePath: filePath,
+        enableSwipe: true,
+        swipeHorizontal: false,
+        autoSpacing: false,
+        pageFling: false,
+      ),
+    );
+  }
+}

lib/screens/marine/manual/info_centre_document.dart

@@ -1,54 +1,259 @@
+// lib/screens/marine/manual/info_centre_document.dart
+
+import 'dart:io';
 import 'package:flutter/material.dart';
-import 'package:file_picker/file_picker.dart';
+import 'package:provider/provider.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
+import 'package:environment_monitoring_app/services/local_storage_service.dart';
+import '../../../auth_provider.dart';
+
+// (The MarineDocument model class remains the same)
+class MarineDocument {
+  final int id;
+  final String title;
+  final String module;
+  final String? group;
+  final String url;
+  final String? departmentName;
+
+  MarineDocument({
+    required this.id,
+    required this.title,
+    required this.module,
+    this.group,
+    required this.url,
+    this.departmentName,
+  });
+
+  factory MarineDocument.fromMap(Map<String, dynamic> map) {
+    return MarineDocument(
+      id: map['id'],
+      title: map['title'],
+      module: map['module'],
+      group: map['group'],
+      url: map['url'],
+      departmentName: map['department_name'],
+    );
+  }
+}
+
 
 class MarineInfoCentreDocument extends StatefulWidget {
+  const MarineInfoCentreDocument({super.key});
+
   @override
   State<MarineInfoCentreDocument> createState() => _MarineInfoCentreDocumentState();
 }
 
 class _MarineInfoCentreDocumentState extends State<MarineInfoCentreDocument> {
-  String? selectedFileName;
+  final LocalStorageService _localStorageService = LocalStorageService();
+  late List<MarineDocument> _documents;
 
-  Future<void> _pickDocument() async {
+  // --- STATE FOR NEW UI ---
-    final result = await FilePicker.platform.pickFiles();
+  // Holds all available groups for the dropdown
-    if (result != null && result.files.isNotEmpty) {
+  List<String> _documentGroups = [];
-      setState(() => selectedFileName = result.files.first.name);
+  // Holds the currently selected group from the dropdown
+  String? _selectedGroup;
+
+  Set<String> _downloadedUrls = {};
+  Map<String, double> _downloadProgress = {};
+
+  @override
+  void initState() {
+    super.initState();
+    _documents = _getFilteredDocumentsFromProvider();
+
+    // --- NEW: Populate the list of groups for the dropdown ---
+    // Get unique group names from the documents
+    final groups = _documents.map((doc) => doc.group ?? 'Uncategorized').toSet().toList();
+    // Add "All Documents" as the first option
+    _documentGroups = ['All Documents', ...groups];
+    // Set the initial value of the dropdown
+    _selectedGroup = _documentGroups.first;
+
+    _checkInitialDownloadStatus();
+  }
+
+  List<MarineDocument> _getFilteredDocumentsFromProvider() {
+    final documentsData = Provider.of<AuthProvider>(context, listen: false).documents;
+    if (documentsData == null || documentsData.isEmpty) {
+      return [];
+    }
+
+    var allDocuments = documentsData.map((map) => MarineDocument.fromMap(map)).toList();
+
+    return allDocuments.where((doc) {
+      return doc.departmentName == 'Marine' && doc.module == 'Manual';
+    }).toList();
+  }
+
+  Future<void> _checkInitialDownloadStatus() async {
+    final downloaded = <String>{};
+    for (var doc in _documents) {
+      if (await _localStorageService.isDocumentDownloaded(doc.url)) {
+        downloaded.add(doc.url);
+      }
+    }
+    if (mounted) {
+      setState(() {
+        _downloadedUrls = downloaded;
+      });
+    }
+  }
+
+  Future<void> _handleDownload(MarineDocument doc) async {
+    setState(() {
+      _downloadProgress[doc.url] = 0.0;
+    });
+
+    try {
+      await _localStorageService.downloadDocument(
+        docUrl: doc.url,
+        onReceiveProgress: (progress) {
+          if (mounted) {
+            setState(() {
+              _downloadProgress[doc.url] = progress;
+            });
+          }
+        },
+      );
+      if (mounted) {
+        setState(() {
+          _downloadedUrls.add(doc.url);
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    } catch (e) {
+      if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text("Document '${result.files.first.name}' selected")),
+          SnackBar(content: Text('Download failed for ${doc.title}')),
+        );
+        setState(() {
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    }
+  }
+
+  Future<void> _viewDocument(MarineDocument doc) async {
+    final localPath = await _localStorageService.getLocalDocumentPath(doc.url);
+    if (localPath != null && mounted) {
+      Navigator.push(
+        context,
+        MaterialPageRoute(
+          builder: (context) => PdfViewerScreen(
+            filePath: localPath,
+            title: doc.title,
+          ),
+        ),
       );
     }
   }
 
+  Widget _buildTrailingWidget(MarineDocument doc) {
+    if (_downloadProgress.containsKey(doc.url)) {
+      return SizedBox(
+        width: 24,
+        height: 24,
+        child: CircularProgressIndicator(
+          value: _downloadProgress[doc.url],
+          strokeWidth: 3,
+        ),
+      );
+    }
+
+    if (_downloadedUrls.contains(doc.url)) {
+      return IconButton(
+        icon: const Icon(Icons.visibility, color: Colors.green),
+        tooltip: 'View Document',
+        onPressed: () => _viewDocument(doc),
+      );
+    }
+
+    return IconButton(
+      icon: const Icon(Icons.download_for_offline, color: Colors.blueAccent),
+      tooltip: 'Download for Offline',
+      onPressed: () => _handleDownload(doc),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
+    // --- NEW: Filter the list based on the dropdown selection ---
+    final filteredDocs = _selectedGroup == 'All Documents'
+        ? _documents
+        : _documents.where((doc) => (doc.group ?? 'Uncategorized') == _selectedGroup).toList();
+
     return Scaffold(
-      appBar: AppBar(title: Text("Marine Info Centre Document")),
+      appBar: AppBar(
+        title: const Text("Marine Manuals"),
+      ),
       body: Padding(
-        padding: const EdgeInsets.all(24),
+        padding: const EdgeInsets.all(16.0),
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            Text("Upload or View Reference Documents", style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
+            // --- NEW: Styled Dropdown for filtering ---
-            SizedBox(height: 24),
+            DropdownButtonFormField<String>(
-            ElevatedButton.icon(
+              value: _selectedGroup,
-              icon: Icon(Icons.upload_file),
+              decoration: InputDecoration(
-              label: Text("Select Document"),
+                labelText: 'Filter by Group',
-              onPressed: _pickDocument,
+                border: OutlineInputBorder(
+                  borderRadius: BorderRadius.circular(12),
                 ),
-            SizedBox(height: 16),
+                contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
-            if (selectedFileName != null)
+              ),
-              Text("Selected: $selectedFileName", style: TextStyle(fontSize: 16)),
+              items: _documentGroups.map((String group) {
-            SizedBox(height: 24),
+                return DropdownMenuItem<String>(
-            ElevatedButton(
+                  value: group,
-              onPressed: selectedFileName != null
+                  child: Text(group),
-                  ? () {
-                // Submit logic here
-                ScaffoldMessenger.of(context).showSnackBar(
-                  SnackBar(content: Text("Document submitted")),
                 );
-              }
+              }).toList(),
+              onChanged: (newValue) {
+                setState(() {
+                  _selectedGroup = newValue;
+                });
+              },
+            ),
+            const SizedBox(height: 20),
+
+            // --- NEW: List title ---
+            Text(
+              _selectedGroup!,
+              style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
+            ),
+            const Divider(height: 20),
+
+            // --- NEW: Use Expanded to make the list scrollable within the Column ---
+            Expanded(
+              child: _documents.isEmpty
+                  ? const Center(child: Text("No Marine Manual documents found."))
+                  : ListView.builder(
+                itemCount: filteredDocs.length,
+                itemBuilder: (context, index) {
+                  final doc = filteredDocs[index];
+                  // --- NEW: Wrap each item in a Card for modern styling ---
+                  return Card(
+                    elevation: 2.0,
+                    margin: const EdgeInsets.symmetric(vertical: 6.0),
+                    shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(12),
+                    ),
+                    child: ListTile(
+                      // --- NEW: Styled icon ---
+                      leading: CircleAvatar(
+                        backgroundColor: Colors.red.shade100,
+                        child: const Icon(Icons.picture_as_pdf, color: Colors.redAccent),
+                      ),
+                      title: Text(doc.title),
+                      trailing: _buildTrailingWidget(doc),
+                      onTap: _downloadedUrls.contains(doc.url)
+                          ? () => _viewDocument(doc)
                           : null,
-              child: Text("Submit Document"),
+                    ),
+                  );
+                },
+              ),
             ),
           ],
         ),
@@ -56,3 +261,31 @@ class _MarineInfoCentreDocumentState extends State<MarineInfoCentreDocument> {
     );
   }
 }
+
+
+class PdfViewerScreen extends StatelessWidget {
+  final String filePath;
+  final String title;
+
+  const PdfViewerScreen({
+    super.key,
+    required this.filePath,
+    required this.title,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+      ),
+      body: PDFView(
+        filePath: filePath,
+        enableSwipe: true,
+        swipeHorizontal: false,
+        autoSpacing: false,
+        pageFling: false,
+      ),
+    );
+  }
+}

lib/screens/marine/manual/marine_manual_dashboard.dart

@@ -1,42 +0,0 @@
-import 'package:flutter/material.dart';
-
-class MarineManualDashboard extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text("Marine Manual Sampling")),
-      body: Padding(
-        padding: const EdgeInsets.all(24),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text("Manual Sampling", style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
-            SizedBox(height: 24),
-            Wrap(
-              spacing: 16,
-              runSpacing: 16,
-              children: [
-                _buildNavButton(context, "Overview", Icons.info, '/marine/manual/overview'),
-                _buildNavButton(context, "Entry", Icons.edit, '/marine/manual/entry'),
-                _buildNavButton(context, "Report", Icons.insert_chart, '/marine/manual/report'),
-              ],
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Widget _buildNavButton(BuildContext context, String label, IconData icon, String route) {
-    return ElevatedButton.icon(
-      onPressed: () => Navigator.pushNamed(context, route),
-      icon: Icon(icon),
-      label: Text(label),
-      style: ElevatedButton.styleFrom(
-        padding: EdgeInsets.symmetric(horizontal: 24, vertical: 16),
-        backgroundColor: Colors.blue[800],
-        foregroundColor: Colors.white,
-      ),
-    );
-  }
-}

lib/screens/marine/marine_home_page.dart

@@ -37,8 +37,8 @@ class MarineHomePage extends StatelessWidget {
         SidebarItem(icon: Icons.waves, label: "Tarball Sampling", route: '/marine/manual/tarball'),
 
         SidebarItem(icon: Icons.article, label: "Data Log", route: '/marine/manual/data-log'),
-        SidebarItem(icon: Icons.image, label: "Image Request", route: '/marine/manual/image-request'),
+        //SidebarItem(icon: Icons.image, label: "Image Request", route: '/marine/manual/image-request'),
-        SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/marine/manual/report'),
+        //SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/marine/manual/report'),
       ],
     ),
     SidebarItem(
@@ -46,10 +46,11 @@ class MarineHomePage extends StatelessWidget {
       label: "Continuous",
       isParent: true,
       children: [
-        SidebarItem(icon: Icons.dashboard, label: "Dashboard", route: '/marine/continuous/dashboard'),
+        // MODIFIED: Updated label, icon, and route for the new Info Centre screen
-        SidebarItem(icon: Icons.info, label: "Overview", route: '/marine/continuous/overview'),
+        SidebarItem(icon: Icons.description, label: "Info Centre Document", route: '/marine/continuous/info'),
-        SidebarItem(icon: Icons.input, label: "Entry", route: '/marine/continuous/entry'),
+        //SidebarItem(icon: Icons.info, label: "Overview", route: '/marine/continuous/overview'),
-        SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/marine/continuous/report'),
+        //SidebarItem(icon: Icons.input, label: "Entry", route: '/marine/continuous/entry'),
+        //SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/marine/continuous/report'),
       ],
     ),
     SidebarItem(
@@ -57,10 +58,11 @@ class MarineHomePage extends StatelessWidget {
       label: "Investigative",
       isParent: true,
       children: [
-        SidebarItem(icon: Icons.dashboard, label: "Dashboard", route: '/marine/investigative/dashboard'),
+        // MODIFIED: Updated label, icon, and route for the new Info Centre screen
-        SidebarItem(icon: Icons.info, label: "Overview", route: '/marine/investigative/overview'),
+        SidebarItem(icon: Icons.description, label: "Info Centre Document", route: '/marine/investigative/info'),
-        SidebarItem(icon: Icons.input, label: "Entry", route: '/marine/investigative/entry'),
+        //SidebarItem(icon: Icons.info, label: "Overview", route: '/marine/investigative/overview'),
-        SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/marine/investigative/report'),
+        //SidebarItem(icon: Icons.input, label: "Entry", route: '/marine/investigative/entry'),
+        //SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/marine/investigative/report'),
       ],
     ),
   ];

lib/screens/river/continuous/river_continuous_dashboard.dart

@@ -1,42 +0,0 @@
-import 'package:flutter/material.dart';
-
-class RiverContinuousDashboard extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text("River Continuous Monitoring")),
-      body: Padding(
-        padding: const EdgeInsets.all(24),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text("Continuous Monitoring", style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
-            SizedBox(height: 24),
-            Wrap(
-              spacing: 16,
-              runSpacing: 16,
-              children: [
-                _buildNavButton(context, "Overview", Icons.info, '/river/continuous/overview'),
-                _buildNavButton(context, "Entry", Icons.edit, '/river/continuous/entry'),
-                _buildNavButton(context, "Report", Icons.insert_chart, '/river/continuous/report'),
-              ],
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Widget _buildNavButton(BuildContext context, String label, IconData icon, String route) {
-    return ElevatedButton.icon(
-      onPressed: () => Navigator.pushNamed(context, route),
-      icon: Icon(icon),
-      label: Text(label),
-      style: ElevatedButton.styleFrom(
-        padding: EdgeInsets.symmetric(horizontal: 24, vertical: 16),
-        backgroundColor: Colors.blue[800],
-        foregroundColor: Colors.white,
-      ),
-    );
-  }
-}

lib/screens/river/continuous/river_continuous_info_centre_document.dart

@@ -0,0 +1,272 @@
+//lib/screens/river/continuous/river_continuous_info_centre_document.dart
+
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
+import 'package:environment_monitoring_app/services/local_storage_service.dart';
+import '../../../auth_provider.dart';
+
+// This model is used generically across departments
+class MarineDocument {
+  final int id;
+  final String title;
+  final String module;
+  final String? group;
+  final String url;
+  final String? departmentName;
+
+  MarineDocument({
+    required this.id,
+    required this.title,
+    required this.module,
+    this.group,
+    required this.url,
+    this.departmentName,
+  });
+
+  factory MarineDocument.fromMap(Map<String, dynamic> map) {
+    return MarineDocument(
+      id: map['id'],
+      title: map['title'],
+      module: map['module'],
+      group: map['group'],
+      url: map['url'],
+      departmentName: map['department_name'],
+    );
+  }
+}
+
+class RiverContinuousInfoCentreDocument extends StatefulWidget {
+  const RiverContinuousInfoCentreDocument({super.key});
+
+  @override
+  State<RiverContinuousInfoCentreDocument> createState() => _RiverContinuousInfoCentreDocumentState();
+}
+
+class _RiverContinuousInfoCentreDocumentState extends State<RiverContinuousInfoCentreDocument> {
+  final LocalStorageService _localStorageService = LocalStorageService();
+  late List<MarineDocument> _documents;
+
+  List<String> _documentGroups = [];
+  String? _selectedGroup;
+
+  Set<String> _downloadedUrls = {};
+  Map<String, double> _downloadProgress = {};
+
+  @override
+  void initState() {
+    super.initState();
+    _documents = _getFilteredDocumentsFromProvider();
+    final groups = _documents.map((doc) => doc.group ?? 'Uncategorized').toSet().toList();
+    _documentGroups = ['All Documents', ...groups];
+    _selectedGroup = _documentGroups.first;
+    _checkInitialDownloadStatus();
+  }
+
+  List<MarineDocument> _getFilteredDocumentsFromProvider() {
+    final documentsData = Provider.of<AuthProvider>(context, listen: false).documents;
+    if (documentsData == null || documentsData.isEmpty) {
+      return [];
+    }
+
+    var allDocuments = documentsData.map((map) => MarineDocument.fromMap(map)).toList();
+
+    return allDocuments.where((doc) {
+      return doc.departmentName == 'River' && doc.module == 'Continuous';
+    }).toList();
+  }
+
+  Future<void> _checkInitialDownloadStatus() async {
+    final downloaded = <String>{};
+    for (var doc in _documents) {
+      if (await _localStorageService.isDocumentDownloaded(doc.url)) {
+        downloaded.add(doc.url);
+      }
+    }
+    if (mounted) {
+      setState(() {
+        _downloadedUrls = downloaded;
+      });
+    }
+  }
+
+  Future<void> _handleDownload(MarineDocument doc) async {
+    setState(() {
+      _downloadProgress[doc.url] = 0.0;
+    });
+
+    try {
+      await _localStorageService.downloadDocument(
+        docUrl: doc.url,
+        onReceiveProgress: (progress) {
+          if (mounted) {
+            setState(() {
+              _downloadProgress[doc.url] = progress;
+            });
+          }
+        },
+      );
+      if (mounted) {
+        setState(() {
+          _downloadedUrls.add(doc.url);
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Download failed for ${doc.title}')),
+        );
+        setState(() {
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    }
+  }
+
+  Future<void> _viewDocument(MarineDocument doc) async {
+    final localPath = await _localStorageService.getLocalDocumentPath(doc.url);
+    if (localPath != null && mounted) {
+      Navigator.push(
+        context,
+        MaterialPageRoute(
+          builder: (context) => PdfViewerScreen(
+            filePath: localPath,
+            title: doc.title,
+          ),
+        ),
+      );
+    }
+  }
+
+  Widget _buildTrailingWidget(MarineDocument doc) {
+    if (_downloadProgress.containsKey(doc.url)) {
+      return SizedBox(
+        width: 24,
+        height: 24,
+        child: CircularProgressIndicator(
+          value: _downloadProgress[doc.url],
+          strokeWidth: 3,
+        ),
+      );
+    }
+
+    if (_downloadedUrls.contains(doc.url)) {
+      return IconButton(
+        icon: const Icon(Icons.visibility, color: Colors.green),
+        tooltip: 'View Document',
+        onPressed: () => _viewDocument(doc),
+      );
+    }
+
+    return IconButton(
+      icon: const Icon(Icons.download_for_offline, color: Colors.blueAccent),
+      tooltip: 'Download for Offline',
+      onPressed: () => _handleDownload(doc),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final filteredDocs = _selectedGroup == 'All Documents'
+        ? _documents
+        : _documents.where((doc) => (doc.group ?? 'Uncategorized') == _selectedGroup).toList();
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("River Continuous Documents"),
+      ),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            DropdownButtonFormField<String>(
+              value: _selectedGroup,
+              decoration: InputDecoration(
+                labelText: 'Filter by Group',
+                border: OutlineInputBorder(
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+              ),
+              items: _documentGroups.map((String group) {
+                return DropdownMenuItem<String>(
+                  value: group,
+                  child: Text(group),
+                );
+              }).toList(),
+              onChanged: (newValue) {
+                setState(() {
+                  _selectedGroup = newValue;
+                });
+              },
+            ),
+            const SizedBox(height: 20),
+            Text(
+              _selectedGroup!,
+              style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
+            ),
+            const Divider(height: 20),
+            Expanded(
+              child: _documents.isEmpty
+                  ? const Center(child: Text("No River Continuous documents found."))
+                  : ListView.builder(
+                itemCount: filteredDocs.length,
+                itemBuilder: (context, index) {
+                  final doc = filteredDocs[index];
+                  return Card(
+                    elevation: 2.0,
+                    margin: const EdgeInsets.symmetric(vertical: 6.0),
+                    shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(12),
+                    ),
+                    child: ListTile(
+                      leading: CircleAvatar(
+                        backgroundColor: Colors.red.shade100,
+                        child: const Icon(Icons.picture_as_pdf, color: Colors.redAccent),
+                      ),
+                      title: Text(doc.title),
+                      trailing: _buildTrailingWidget(doc),
+                      onTap: _downloadedUrls.contains(doc.url)
+                          ? () => _viewDocument(doc)
+                          : null,
+                    ),
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class PdfViewerScreen extends StatelessWidget {
+  final String filePath;
+  final String title;
+
+  const PdfViewerScreen({
+    super.key,
+    required this.filePath,
+    required this.title,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+      ),
+      body: PDFView(
+        filePath: filePath,
+        enableSwipe: true,
+        swipeHorizontal: false,
+        autoSpacing: false,
+        pageFling: false,
+      ),
+    );
+  }
+}

lib/screens/river/investigative/river_investigative_dashboard.dart

@@ -1,42 +0,0 @@
-import 'package:flutter/material.dart';
-
-class RiverInvestigativeDashboard extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text("River Investigative Study")),
-      body: Padding(
-        padding: const EdgeInsets.all(24),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text("Investigative Study", style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
-            SizedBox(height: 24),
-            Wrap(
-              spacing: 16,
-              runSpacing: 16,
-              children: [
-                _buildNavButton(context, "Overview", Icons.info, '/river/investigative/overview'),
-                _buildNavButton(context, "Entry", Icons.edit, '/river/investigative/entry'),
-                _buildNavButton(context, "Report", Icons.insert_chart, '/river/investigative/report'),
-              ],
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Widget _buildNavButton(BuildContext context, String label, IconData icon, String route) {
-    return ElevatedButton.icon(
-      onPressed: () => Navigator.pushNamed(context, route),
-      icon: Icon(icon),
-      label: Text(label),
-      style: ElevatedButton.styleFrom(
-        padding: EdgeInsets.symmetric(horizontal: 24, vertical: 16),
-        backgroundColor: Colors.blue[800],
-        foregroundColor: Colors.white,
-      ),
-    );
-  }
-}

lib/screens/river/investigative/river_investigative_info_centre_document.dart

@@ -0,0 +1,272 @@
+//lib/screens/river/investigative/river_investigative_info_centre_document.dart
+
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
+import 'package:environment_monitoring_app/services/local_storage_service.dart';
+import '../../../auth_provider.dart';
+
+// This model is used generically across departments
+class MarineDocument {
+  final int id;
+  final String title;
+  final String module;
+  final String? group;
+  final String url;
+  final String? departmentName;
+
+  MarineDocument({
+    required this.id,
+    required this.title,
+    required this.module,
+    this.group,
+    required this.url,
+    this.departmentName,
+  });
+
+  factory MarineDocument.fromMap(Map<String, dynamic> map) {
+    return MarineDocument(
+      id: map['id'],
+      title: map['title'],
+      module: map['module'],
+      group: map['group'],
+      url: map['url'],
+      departmentName: map['department_name'],
+    );
+  }
+}
+
+class RiverInvestigativeInfoCentreDocument extends StatefulWidget {
+  const RiverInvestigativeInfoCentreDocument({super.key});
+
+  @override
+  State<RiverInvestigativeInfoCentreDocument> createState() => _RiverInvestigativeInfoCentreDocumentState();
+}
+
+class _RiverInvestigativeInfoCentreDocumentState extends State<RiverInvestigativeInfoCentreDocument> {
+  final LocalStorageService _localStorageService = LocalStorageService();
+  late List<MarineDocument> _documents;
+
+  List<String> _documentGroups = [];
+  String? _selectedGroup;
+
+  Set<String> _downloadedUrls = {};
+  Map<String, double> _downloadProgress = {};
+
+  @override
+  void initState() {
+    super.initState();
+    _documents = _getFilteredDocumentsFromProvider();
+    final groups = _documents.map((doc) => doc.group ?? 'Uncategorized').toSet().toList();
+    _documentGroups = ['All Documents', ...groups];
+    _selectedGroup = _documentGroups.first;
+    _checkInitialDownloadStatus();
+  }
+
+  List<MarineDocument> _getFilteredDocumentsFromProvider() {
+    final documentsData = Provider.of<AuthProvider>(context, listen: false).documents;
+    if (documentsData == null || documentsData.isEmpty) {
+      return [];
+    }
+
+    var allDocuments = documentsData.map((map) => MarineDocument.fromMap(map)).toList();
+
+    return allDocuments.where((doc) {
+      return doc.departmentName == 'River' && doc.module == 'Investigative';
+    }).toList();
+  }
+
+  Future<void> _checkInitialDownloadStatus() async {
+    final downloaded = <String>{};
+    for (var doc in _documents) {
+      if (await _localStorageService.isDocumentDownloaded(doc.url)) {
+        downloaded.add(doc.url);
+      }
+    }
+    if (mounted) {
+      setState(() {
+        _downloadedUrls = downloaded;
+      });
+    }
+  }
+
+  Future<void> _handleDownload(MarineDocument doc) async {
+    setState(() {
+      _downloadProgress[doc.url] = 0.0;
+    });
+
+    try {
+      await _localStorageService.downloadDocument(
+        docUrl: doc.url,
+        onReceiveProgress: (progress) {
+          if (mounted) {
+            setState(() {
+              _downloadProgress[doc.url] = progress;
+            });
+          }
+        },
+      );
+      if (mounted) {
+        setState(() {
+          _downloadedUrls.add(doc.url);
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Download failed for ${doc.title}')),
+        );
+        setState(() {
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    }
+  }
+
+  Future<void> _viewDocument(MarineDocument doc) async {
+    final localPath = await _localStorageService.getLocalDocumentPath(doc.url);
+    if (localPath != null && mounted) {
+      Navigator.push(
+        context,
+        MaterialPageRoute(
+          builder: (context) => PdfViewerScreen(
+            filePath: localPath,
+            title: doc.title,
+          ),
+        ),
+      );
+    }
+  }
+
+  Widget _buildTrailingWidget(MarineDocument doc) {
+    if (_downloadProgress.containsKey(doc.url)) {
+      return SizedBox(
+        width: 24,
+        height: 24,
+        child: CircularProgressIndicator(
+          value: _downloadProgress[doc.url],
+          strokeWidth: 3,
+        ),
+      );
+    }
+
+    if (_downloadedUrls.contains(doc.url)) {
+      return IconButton(
+        icon: const Icon(Icons.visibility, color: Colors.green),
+        tooltip: 'View Document',
+        onPressed: () => _viewDocument(doc),
+      );
+    }
+
+    return IconButton(
+      icon: const Icon(Icons.download_for_offline, color: Colors.blueAccent),
+      tooltip: 'Download for Offline',
+      onPressed: () => _handleDownload(doc),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final filteredDocs = _selectedGroup == 'All Documents'
+        ? _documents
+        : _documents.where((doc) => (doc.group ?? 'Uncategorized') == _selectedGroup).toList();
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("River Investigative Documents"),
+      ),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            DropdownButtonFormField<String>(
+              value: _selectedGroup,
+              decoration: InputDecoration(
+                labelText: 'Filter by Group',
+                border: OutlineInputBorder(
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+              ),
+              items: _documentGroups.map((String group) {
+                return DropdownMenuItem<String>(
+                  value: group,
+                  child: Text(group),
+                );
+              }).toList(),
+              onChanged: (newValue) {
+                setState(() {
+                  _selectedGroup = newValue;
+                });
+              },
+            ),
+            const SizedBox(height: 20),
+            Text(
+              _selectedGroup!,
+              style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
+            ),
+            const Divider(height: 20),
+            Expanded(
+              child: _documents.isEmpty
+                  ? const Center(child: Text("No River Investigative documents found."))
+                  : ListView.builder(
+                itemCount: filteredDocs.length,
+                itemBuilder: (context, index) {
+                  final doc = filteredDocs[index];
+                  return Card(
+                    elevation: 2.0,
+                    margin: const EdgeInsets.symmetric(vertical: 6.0),
+                    shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(12),
+                    ),
+                    child: ListTile(
+                      leading: CircleAvatar(
+                        backgroundColor: Colors.red.shade100,
+                        child: const Icon(Icons.picture_as_pdf, color: Colors.redAccent),
+                      ),
+                      title: Text(doc.title),
+                      trailing: _buildTrailingWidget(doc),
+                      onTap: _downloadedUrls.contains(doc.url)
+                          ? () => _viewDocument(doc)
+                          : null,
+                    ),
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class PdfViewerScreen extends StatelessWidget {
+  final String filePath;
+  final String title;
+
+  const PdfViewerScreen({
+    super.key,
+    required this.filePath,
+    required this.title,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+      ),
+      body: PDFView(
+        filePath: filePath,
+        enableSwipe: true,
+        swipeHorizontal: false,
+        autoSpacing: false,
+        pageFling: false,
+      ),
+    );
+  }
+}

lib/screens/river/manual/river_manual_dashboard.dart

@@ -1,42 +0,0 @@
-import 'package:flutter/material.dart';
-
-class RiverManualDashboard extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text("River Manual Sampling")),
-      body: Padding(
-        padding: const EdgeInsets.all(24),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text("Manual Sampling", style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
-            SizedBox(height: 24),
-            Wrap(
-              spacing: 16,
-              runSpacing: 16,
-              children: [
-                _buildNavButton(context, "Overview", Icons.info, '/river/manual/overview'),
-                _buildNavButton(context, "Entry", Icons.edit, '/river/manual/entry'),
-                _buildNavButton(context, "Report", Icons.insert_chart, '/river/manual/report'),
-              ],
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  Widget _buildNavButton(BuildContext context, String label, IconData icon, String route) {
-    return ElevatedButton.icon(
-      onPressed: () => Navigator.pushNamed(context, route),
-      icon: Icon(icon),
-      label: Text(label),
-      style: ElevatedButton.styleFrom(
-        padding: EdgeInsets.symmetric(horizontal: 24, vertical: 16),
-        backgroundColor: Colors.blue[800],
-        foregroundColor: Colors.white,
-      ),
-    );
-  }
-}

lib/screens/river/manual/river_manual_info_centre_document.dart

@@ -0,0 +1,272 @@
+//lib/screens/river/manual/river_manual_info_centre_document.dart
+
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
+import 'package:environment_monitoring_app/services/local_storage_service.dart';
+import '../../../auth_provider.dart';
+
+// This model is used generically across departments
+class MarineDocument {
+  final int id;
+  final String title;
+  final String module;
+  final String? group;
+  final String url;
+  final String? departmentName;
+
+  MarineDocument({
+    required this.id,
+    required this.title,
+    required this.module,
+    this.group,
+    required this.url,
+    this.departmentName,
+  });
+
+  factory MarineDocument.fromMap(Map<String, dynamic> map) {
+    return MarineDocument(
+      id: map['id'],
+      title: map['title'],
+      module: map['module'],
+      group: map['group'],
+      url: map['url'],
+      departmentName: map['department_name'],
+    );
+  }
+}
+
+class RiverManualInfoCentreDocument extends StatefulWidget {
+  const RiverManualInfoCentreDocument({super.key});
+
+  @override
+  State<RiverManualInfoCentreDocument> createState() => _RiverManualInfoCentreDocumentState();
+}
+
+class _RiverManualInfoCentreDocumentState extends State<RiverManualInfoCentreDocument> {
+  final LocalStorageService _localStorageService = LocalStorageService();
+  late List<MarineDocument> _documents;
+
+  List<String> _documentGroups = [];
+  String? _selectedGroup;
+
+  Set<String> _downloadedUrls = {};
+  Map<String, double> _downloadProgress = {};
+
+  @override
+  void initState() {
+    super.initState();
+    _documents = _getFilteredDocumentsFromProvider();
+    final groups = _documents.map((doc) => doc.group ?? 'Uncategorized').toSet().toList();
+    _documentGroups = ['All Documents', ...groups];
+    _selectedGroup = _documentGroups.first;
+    _checkInitialDownloadStatus();
+  }
+
+  List<MarineDocument> _getFilteredDocumentsFromProvider() {
+    final documentsData = Provider.of<AuthProvider>(context, listen: false).documents;
+    if (documentsData == null || documentsData.isEmpty) {
+      return [];
+    }
+
+    var allDocuments = documentsData.map((map) => MarineDocument.fromMap(map)).toList();
+
+    return allDocuments.where((doc) {
+      return doc.departmentName == 'River' && doc.module == 'Manual';
+    }).toList();
+  }
+
+  Future<void> _checkInitialDownloadStatus() async {
+    final downloaded = <String>{};
+    for (var doc in _documents) {
+      if (await _localStorageService.isDocumentDownloaded(doc.url)) {
+        downloaded.add(doc.url);
+      }
+    }
+    if (mounted) {
+      setState(() {
+        _downloadedUrls = downloaded;
+      });
+    }
+  }
+
+  Future<void> _handleDownload(MarineDocument doc) async {
+    setState(() {
+      _downloadProgress[doc.url] = 0.0;
+    });
+
+    try {
+      await _localStorageService.downloadDocument(
+        docUrl: doc.url,
+        onReceiveProgress: (progress) {
+          if (mounted) {
+            setState(() {
+              _downloadProgress[doc.url] = progress;
+            });
+          }
+        },
+      );
+      if (mounted) {
+        setState(() {
+          _downloadedUrls.add(doc.url);
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Download failed for ${doc.title}')),
+        );
+        setState(() {
+          _downloadProgress.remove(doc.url);
+        });
+      }
+    }
+  }
+
+  Future<void> _viewDocument(MarineDocument doc) async {
+    final localPath = await _localStorageService.getLocalDocumentPath(doc.url);
+    if (localPath != null && mounted) {
+      Navigator.push(
+        context,
+        MaterialPageRoute(
+          builder: (context) => PdfViewerScreen(
+            filePath: localPath,
+            title: doc.title,
+          ),
+        ),
+      );
+    }
+  }
+
+  Widget _buildTrailingWidget(MarineDocument doc) {
+    if (_downloadProgress.containsKey(doc.url)) {
+      return SizedBox(
+        width: 24,
+        height: 24,
+        child: CircularProgressIndicator(
+          value: _downloadProgress[doc.url],
+          strokeWidth: 3,
+        ),
+      );
+    }
+
+    if (_downloadedUrls.contains(doc.url)) {
+      return IconButton(
+        icon: const Icon(Icons.visibility, color: Colors.green),
+        tooltip: 'View Document',
+        onPressed: () => _viewDocument(doc),
+      );
+    }
+
+    return IconButton(
+      icon: const Icon(Icons.download_for_offline, color: Colors.blueAccent),
+      tooltip: 'Download for Offline',
+      onPressed: () => _handleDownload(doc),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final filteredDocs = _selectedGroup == 'All Documents'
+        ? _documents
+        : _documents.where((doc) => (doc.group ?? 'Uncategorized') == _selectedGroup).toList();
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("River Manual Documents"),
+      ),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            DropdownButtonFormField<String>(
+              value: _selectedGroup,
+              decoration: InputDecoration(
+                labelText: 'Filter by Group',
+                border: OutlineInputBorder(
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+              ),
+              items: _documentGroups.map((String group) {
+                return DropdownMenuItem<String>(
+                  value: group,
+                  child: Text(group),
+                );
+              }).toList(),
+              onChanged: (newValue) {
+                setState(() {
+                  _selectedGroup = newValue;
+                });
+              },
+            ),
+            const SizedBox(height: 20),
+            Text(
+              _selectedGroup!,
+              style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
+            ),
+            const Divider(height: 20),
+            Expanded(
+              child: _documents.isEmpty
+                  ? const Center(child: Text("No River Manual documents found."))
+                  : ListView.builder(
+                itemCount: filteredDocs.length,
+                itemBuilder: (context, index) {
+                  final doc = filteredDocs[index];
+                  return Card(
+                    elevation: 2.0,
+                    margin: const EdgeInsets.symmetric(vertical: 6.0),
+                    shape: RoundedRectangleBorder(
+                      borderRadius: BorderRadius.circular(12),
+                    ),
+                    child: ListTile(
+                      leading: CircleAvatar(
+                        backgroundColor: Colors.red.shade100,
+                        child: const Icon(Icons.picture_as_pdf, color: Colors.redAccent),
+                      ),
+                      title: Text(doc.title),
+                      trailing: _buildTrailingWidget(doc),
+                      onTap: _downloadedUrls.contains(doc.url)
+                          ? () => _viewDocument(doc)
+                          : null,
+                    ),
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class PdfViewerScreen extends StatelessWidget {
+  final String filePath;
+  final String title;
+
+  const PdfViewerScreen({
+    super.key,
+    required this.filePath,
+    required this.title,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(title),
+      ),
+      body: PDFView(
+        filePath: filePath,
+        enableSwipe: true,
+        swipeHorizontal: false,
+        autoSpacing: false,
+        pageFling: false,
+      ),
+    );
+  }
+}

lib/screens/river/river_home_page.dart

@@ -1,3 +1,5 @@
+//lib/screens/river/river_home_page.dart
+
 import 'package:flutter/material.dart';
 
 // Re-defining SidebarItem here for self-containment,
@@ -30,12 +32,12 @@ class RiverHomePage extends StatelessWidget {
       label: "Manual",
       isParent: true,
       children: [
-        //SidebarItem(icon: Icons.dashboard, label: "Dashboard", route: '/river/manual/dashboard'),
+        // MODIFIED: Added Info Centre Document link for consistency
+        SidebarItem(icon: Icons.description, label: "Info Centre Document", route: '/river/manual/info'),
         SidebarItem(icon: Icons.pin_drop, label: "In-Situ Sampling", route: '/river/manual/in-situ'),
         SidebarItem(icon: Icons.date_range, label: "Triennial Sampling", route: '/river/manual/triennial'),
-        //SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/river/manual/report'),
         SidebarItem(icon: Icons.article, label: "Data Log", route: '/river/manual/data-log'),
-        SidebarItem(icon: Icons.image, label: "Image Request", route: '/river/manual/image-request'),
+        //SidebarItem(icon: Icons.image, label: "Image Request", route: '/river/manual/image-request'),
       ],
     ),
     SidebarItem(
@@ -43,10 +45,11 @@ class RiverHomePage extends StatelessWidget {
       label: "Continuous",
       isParent: true,
       children: [
-        SidebarItem(icon: Icons.dashboard, label: "Dashboard", route: '/river/continuous/dashboard'),
+        // MODIFIED: Updated to point to the new Info Centre screen
-        SidebarItem(icon: Icons.info, label: "Overview", route: '/river/continuous/overview'),
+        SidebarItem(icon: Icons.description, label: "Info Centre Document", route: '/river/continuous/info'),
-        SidebarItem(icon: Icons.input, label: "Entry", route: '/river/continuous/entry'),
+        //SidebarItem(icon: Icons.info, label: "Overview", route: '/river/continuous/overview'),
-        SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/river/continuous/report'),
+        //SidebarItem(icon: Icons.input, label: "Entry", route: '/river/continuous/entry'),
+        //SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/river/continuous/report'),
       ],
     ),
     SidebarItem(
@@ -54,10 +57,11 @@ class RiverHomePage extends StatelessWidget {
       label: "Investigative",
       isParent: true,
       children: [
-        SidebarItem(icon: Icons.dashboard, label: "Dashboard", route: '/river/investigative/dashboard'),
+        // MODIFIED: Updated to point to the new Info Centre screen
-        SidebarItem(icon: Icons.info, label: "Overview", route: '/river/investigative/overview'),
+        SidebarItem(icon: Icons.description, label: "Info Centre Document", route: '/river/investigative/info'),
-        SidebarItem(icon: Icons.input, label: "Entry", route: '/river/investigative/entry'),
+       // SidebarItem(icon: Icons.info, label: "Overview", route: '/river/investigative/overview'),
-        SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/river/investigative/report'),
+        //SidebarItem(icon: Icons.input, label: "Entry", route: '/river/investigative/entry'),
+        //SidebarItem(icon: Icons.receipt_long, label: "Report", route: '/river/investigative/report'),
       ],
     ),
   ];

lib/services/api_service.dart

@@ -185,6 +185,9 @@ class ApiService {
       final syncTasks = {
         'profile': {'endpoint': 'profile', 'handler': (d, id) async { if (d.isNotEmpty) await dbHelper.saveProfile(d.first); }},
         'allUsers': {'endpoint': 'users', 'handler': (d, id) async { await dbHelper.upsertUsers(d); await dbHelper.deleteUsers(id); }},
+        // --- ADDED: New sync task for documents ---
+        'documents': {'endpoint': 'documents', 'handler': (d, id) async { await dbHelper.upsertDocuments(d); await dbHelper.deleteDocuments(id); }},
+        // --- END ADDED ---
         'tarballStations': {'endpoint': 'marine/tarball/stations', 'handler': (d, id) async { await dbHelper.upsertTarballStations(d); await dbHelper.deleteTarballStations(id); }},
         'manualStations': {'endpoint': 'marine/manual/stations', 'handler': (d, id) async { await dbHelper.upsertManualStations(d); await dbHelper.deleteManualStations(id); }},
         'tarballClassifications': {'endpoint': 'marine/tarball/classifications', 'handler': (d, id) async { await dbHelper.upsertTarballClassifications(d); await dbHelper.deleteTarballClassifications(id); }},
@@ -619,7 +622,8 @@ class RiverApiService {
 class DatabaseHelper {
   static Database? _database;
   static const String _dbName = 'app_data.db';
-  static const int _dbVersion = 19;
+  // --- ADDED: Incremented DB version for the new table ---
+  static const int _dbVersion = 20;
 
   static const String _profileTable = 'user_profile';
   static const String _usersTable = 'all_users';
@@ -641,6 +645,8 @@ class DatabaseHelper {
   static const String _ftpConfigsTable = 'ftp_configurations';
   static const String _retryQueueTable = 'retry_queue';
   static const String _submissionLogTable = 'submission_log';
+  // --- ADDED: New table name for documents ---
+  static const String _documentsTable = 'documents';
 
   static const String _modulePreferencesTable = 'module_preferences';
   static const String _moduleApiLinksTable = 'module_api_links';
@@ -730,6 +736,9 @@ class DatabaseHelper {
       )
     ''');
     // END CHANGE
+
+    // --- ADDED: Create the documents table on initial creation ---
+    await db.execute('CREATE TABLE $_documentsTable(id INTEGER PRIMARY KEY, document_json TEXT)');
   }
 
   Future<void> _onUpgrade(Database db, int oldVersion, int newVersion) async {
@@ -814,6 +823,10 @@ class DatabaseHelper {
       ''');
       // END CHANGE
     }
+    // --- ADDED: Upgrade path for the new documents table ---
+    if (oldVersion < 20) {
+      await db.execute('CREATE TABLE IF NOT EXISTS $_documentsTable(id INTEGER PRIMARY KEY, document_json TEXT)');
+    }
   }
 
   /// Performs an "upsert": inserts new records or replaces existing ones.
@@ -871,6 +884,11 @@ class DatabaseHelper {
   Future<void> deleteUsers(List<dynamic> ids) => _deleteData(_usersTable, 'user_id', ids);
   Future<List<Map<String, dynamic>>?> loadUsers() => _loadData(_usersTable, 'user');
 
+  // --- ADDED: Handlers for the new documents table ---
+  Future<void> upsertDocuments(List<Map<String, dynamic>> data) => _upsertData(_documentsTable, 'id', data, 'document');
+  Future<void> deleteDocuments(List<dynamic> ids) => _deleteData(_documentsTable, 'id', ids);
+  Future<List<Map<String, dynamic>>?> loadDocuments() => _loadData(_documentsTable, 'document');
+
   Future<void> upsertTarballStations(List<Map<String, dynamic>> data) => _upsertData(_tarballStationsTable, 'station_id', data, 'station');
   Future<void> deleteTarballStations(List<dynamic> ids) => _deleteData(_tarballStationsTable, 'station_id', ids);
   Future<List<Map<String, dynamic>>?> loadTarballStations() => _loadData(_tarballStationsTable, 'station');

lib/services/local_storage_service.dart

@@ -6,6 +6,8 @@ import 'package:flutter/foundation.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:permission_handler/permission_handler.dart';
 import 'package:path/path.dart' as p;
+// --- ADDED: Import dio for downloading ---
+import 'package:dio/dio.dart';
 
 import '../models/air_installation_data.dart';
 import '../models/air_collection_data.dart';
@@ -539,4 +541,69 @@ class LocalStorageService {
       debugPrint("Error updating river in-situ log: $e");
     }
   }
+
+  // =======================================================================
+  // --- ADDED: Part 6: Info Centre Document Management ---
+  // =======================================================================
+
+  final Dio _dio = Dio();
+
+  /// Gets the directory for storing Info Centre documents, creating it if it doesn't exist.
+  Future<Directory?> _getInfoCentreDocumentsDirectory() async {
+    // We use serverName: '' to ensure documents are stored in a common root MMSV4 folder, not server-specific ones.
+    final mmsv4Dir = await _getPublicMMSV4Directory(serverName: '');
+    if (mmsv4Dir == null) return null;
+
+    final docDir = Directory(p.join(mmsv4Dir.path, 'info_centre_documents'));
+    if (!await docDir.exists()) {
+      await docDir.create(recursive: true);
+    }
+    return docDir;
+  }
+
+  /// Constructs the full local file path for a given document URL.
+  Future<String?> getLocalDocumentPath(String docUrl) async {
+    final docDir = await _getInfoCentreDocumentsDirectory();
+    if (docDir == null) return null;
+
+    final fileName = p.basename(docUrl);
+    return p.join(docDir.path, fileName);
+  }
+
+  /// Checks if a document has already been downloaded.
+  Future<bool> isDocumentDownloaded(String docUrl) async {
+    final filePath = await getLocalDocumentPath(docUrl);
+    if (filePath == null) return false;
+    return await File(filePath).exists();
+  }
+
+  /// Downloads a document from a URL and saves it to the local `MMSV4/info_centre_documents` folder.
+  Future<void> downloadDocument({
+    required String docUrl,
+    required Function(double) onReceiveProgress,
+  }) async {
+    final filePath = await getLocalDocumentPath(docUrl);
+    if (filePath == null) {
+      throw Exception("Could not get local storage path. Check permissions.");
+    }
+
+    try {
+      await _dio.download(
+        docUrl,
+        filePath,
+        onReceiveProgress: (received, total) {
+          if (total != -1) {
+            onReceiveProgress(received / total);
+          }
+        },
+      );
+    } catch (e) {
+      // If the download fails, delete the partially downloaded file to prevent corruption.
+      final file = File(filePath);
+      if (await file.exists()) {
+        await file.delete();
+      }
+      throw Exception("Download failed: $e");
+    }
+  }
 }

linux/flutter/generated_plugin_registrant.cc

@@ -7,9 +7,13 @@
 #include "generated_plugin_registrant.h"
 
 #include <file_selector_linux/file_selector_plugin.h>
+#include <url_launcher_linux/url_launcher_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) file_selector_linux_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "FileSelectorPlugin");
   file_selector_plugin_register_with_registrar(file_selector_linux_registrar);
+  g_autoptr(FlPluginRegistrar) url_launcher_linux_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "UrlLauncherPlugin");
+  url_launcher_plugin_register_with_registrar(url_launcher_linux_registrar);
 }

linux/flutter/generated_plugins.cmake

@@ -4,6 +4,7 @@
 
 list(APPEND FLUTTER_PLUGIN_LIST
   file_selector_linux
+  url_launcher_linux
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -12,6 +12,7 @@ import geolocator_apple
 import path_provider_foundation
 import shared_preferences_foundation
 import sqflite_darwin
+import url_launcher_macos
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   ConnectivityPlusPlugin.register(with: registry.registrar(forPlugin: "ConnectivityPlusPlugin"))
@@ -21,4 +22,5 @@ func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))
   SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
   SqflitePlugin.register(with: registry.registrar(forPlugin: "SqflitePlugin"))
+  UrlLauncherPlugin.register(with: registry.registrar(forPlugin: "UrlLauncherPlugin"))
 }

pubspec.lock

@@ -121,6 +121,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.11"
+  dio:
+    dependency: "direct main"
+    description:
+      name: dio
+      sha256: d90ee57923d1828ac14e492ca49440f65477f4bb1263575900be731a3dac66a9
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.9.0"
+  dio_web_adapter:
+    dependency: transitive
+    description:
+      name: dio_web_adapter
+      sha256: "7586e476d70caecaf1686d21eee7247ea43ef5c345eab9e0cc3583ff13378d78"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
   dropdown_search:
     dependency: "direct main"
     description:
@@ -231,6 +247,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.2"
+  flutter_pdfview:
+    dependency: "direct main"
+    description:
+      name: flutter_pdfview
+      sha256: c402ad1f51ba8ea73b9fb04c003ca0a9286118ba5ac9787ee2aa58956b3fcf8a
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.1+1"
   flutter_plugin_android_lifecycle:
     dependency: transitive
     description:
@@ -838,6 +862,70 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  url_launcher:
+    dependency: "direct main"
+    description:
+      name: url_launcher
+      sha256: f6a7e5c4835bb4e3026a04793a4199ca2d14c739ec378fdfe23fc8075d0439f8
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.2"
+  url_launcher_android:
+    dependency: transitive
+    description:
+      name: url_launcher_android
+      sha256: "69ee86740f2847b9a4ba6cffa74ed12ce500bbe2b07f3dc1e643439da60637b7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.18"
+  url_launcher_ios:
+    dependency: transitive
+    description:
+      name: url_launcher_ios
+      sha256: d80b3f567a617cb923546034cc94bfe44eb15f989fe670b37f26abdb9d939cb7
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.4"
+  url_launcher_linux:
+    dependency: transitive
+    description:
+      name: url_launcher_linux
+      sha256: "4e9ba368772369e3e08f231d2301b4ef72b9ff87c31192ef471b380ef29a4935"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.1"
+  url_launcher_macos:
+    dependency: transitive
+    description:
+      name: url_launcher_macos
+      sha256: c043a77d6600ac9c38300567f33ef12b0ef4f4783a2c1f00231d2b1941fea13f
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.3"
+  url_launcher_platform_interface:
+    dependency: transitive
+    description:
+      name: url_launcher_platform_interface
+      sha256: "552f8a1e663569be95a8190206a38187b531910283c3e982193e4f2733f01029"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.2"
+  url_launcher_web:
+    dependency: transitive
+    description:
+      name: url_launcher_web
+      sha256: "4bd2b7b4dc4d4d0b94e5babfffbca8eac1a126c7f3d6ecbc1a11013faa3abba2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  url_launcher_windows:
+    dependency: transitive
+    description:
+      name: url_launcher_windows
+      sha256: "3284b6d2ac454cf34f114e1d3319866fdd1e19cdc329999057e44ffe936cfa77"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.4"
   usb_serial:
     dependency: "direct main"
     description:
@@ -944,4 +1032,4 @@ packages:
     version: "3.1.3"
 sdks:
   dart: ">=3.8.0 <4.0.0"
-  flutter: ">=3.27.0"
+  flutter: ">=3.29.0"

pubspec.yaml

@@ -29,6 +29,10 @@ dependencies:
   flutter_svg: ^2.0.9
   google_fonts: ^6.1.0
   dropdown_search: ^5.0.6 # For searchable dropdowns in forms
+  # --- ADDED: For opening document URLs ---
+  url_launcher: ^6.2.6
+  flutter_pdfview: ^1.3.2
+  dio: ^5.4.3+1
 
   # --- Device & Hardware Access ---
   image_picker: ^1.0.7

windows/flutter/generated_plugin_registrant.cc

@@ -10,6 +10,7 @@
 #include <file_selector_windows/file_selector_windows.h>
 #include <geolocator_windows/geolocator_windows.h>
 #include <permission_handler_windows/permission_handler_windows_plugin.h>
+#include <url_launcher_windows/url_launcher_windows.h>
 #include <webview_windows/webview_windows_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
@@ -21,6 +22,8 @@ void RegisterPlugins(flutter::PluginRegistry* registry) {
       registry->GetRegistrarForPlugin("GeolocatorWindows"));
   PermissionHandlerWindowsPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("PermissionHandlerWindowsPlugin"));
+  UrlLauncherWindowsRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("UrlLauncherWindows"));
   WebviewWindowsPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("WebviewWindowsPlugin"));
 }

windows/flutter/generated_plugins.cmake

@@ -7,6 +7,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
   file_selector_windows
   geolocator_windows
   permission_handler_windows
+  url_launcher_windows
   webview_windows
 )