feat: implement document upload functionality with dedicated UI, state management, and routing.

apps/mobile/packages/core/lib/src/routing/staff/navigator.dart

@@ -225,6 +225,21 @@ extension StaffNavigator on IModularNavigator {
     pushNamed(StaffPaths.documents);
   }
 
+  /// Pushes the document upload page.
+  ///
+  /// Parameters:
+  ///  * [document] - The document metadata to upload
+  ///  * [initialUrl] - Optional initial document URL
+  void toDocumentUpload({required StaffDocument document, String? initialUrl}) {
+    navigate(
+      StaffPaths.documentUpload,
+      arguments: <String, dynamic>{
+        'document': document,
+        'initialUrl': initialUrl,
+      },
+    );
+  }
+
   /// Pushes the certificates management page.
   ///
   /// Manage professional certificates (e.g., food handling, CPR).

apps/mobile/packages/core/lib/src/routing/staff/route_paths.dart

@@ -164,6 +164,9 @@ class StaffPaths {
   /// Store ID, work permits, and other required documentation.
   static const String documents = '/worker-main/documents/';
 
+  /// Document upload page.
+  static const String documentUpload = '/worker-main/documents/upload/';
+
   /// Certificates management - professional certifications.
   ///
   /// Manage professional certificates (e.g., food handling, CPR, etc.).