fix: defult domain

lib/controllers/home_controller.dart

@@ -2,6 +2,7 @@ import 'package:file_picker/file_picker.dart';
 import 'package:file_transfer/functions/share_file.dart';
 import 'package:file_transfer/models/shared_file.dart';
 import 'package:file_transfer/routes.dart';
+import 'package:file_transfer/utils/platform_helper.dart';
 import 'package:flutter/services.dart';
 import 'package:get/get.dart';
 import 'package:mime/mime.dart';
@@ -67,8 +68,10 @@ class HomePageController extends GetxController {
 
   void copyShareLink() {
     if (_sharedFile.value == null) return;
-    final link =
-        'https://example.com/f/${_sharedFile.value!.nevent}/${_sharedFile.value!.encodedPrivateKey}';
+    final link = PlatformHelper.buildShareLink(
+      _sharedFile.value!.nevent,
+      _sharedFile.value!.encodedPrivateKey,
+    );
     copyToClipboard(link, 'Share link');
   }
 
@@ -90,7 +93,7 @@ class HomePageController extends GetxController {
       return;
     }
 
-    // Parse link: https://example.com/f/:nevent/:nsec
+    // Parse link: <base-url>/f/:nevent/:nsec
     try {
       final uri = Uri.parse(link);
       final segments = uri.pathSegments;
@@ -109,7 +112,7 @@ class HomePageController extends GetxController {
 
     Get.snackbar(
       'Invalid Link',
-      'Please copy a valid share link (https://example.com/f/...)',
+      'Please copy a valid share link',
       snackPosition: SnackPosition.BOTTOM,
     );
   }

lib/pages/home/widgets/share_link_view.dart

@@ -1,5 +1,6 @@
 import 'package:file_transfer/controllers/home_controller.dart';
 import 'package:file_transfer/models/shared_file.dart';
+import 'package:file_transfer/utils/platform_helper.dart';
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
 
@@ -72,18 +73,18 @@ class ShareLinkView extends GetView<HomePageController> {
     SharedFile sharedFile,
     ColorScheme colorScheme,
   ) {
+    final shareLink = PlatformHelper.buildShareLink(
+      sharedFile.nevent,
+      sharedFile.encodedPrivateKey,
+    );
+
     return Card(
       child: Padding(
         padding: EdgeInsets.all(isSmallScreen ? 12 : 16),
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            _buildInfoRow(
-              'Share Link:',
-              'https://example.com/f/${sharedFile.nevent}/${sharedFile.encodedPrivateKey}',
-              isSmallScreen,
-              colorScheme,
-            ),
+            _buildInfoRow('Share Link:', shareLink, isSmallScreen, colorScheme),
             SizedBox(height: isSmallScreen ? 12 : 16),
             _buildInfoRow(
               'Event (nevent):',

lib/utils/platform_helper.dart

@@ -0,0 +1,16 @@
+import 'package:file_transfer/routes.dart';
+
+class PlatformHelper {
+  /// Base URL for share links.
+  ///
+  /// Change this to your deployment URL:
+  /// - GitHub Pages: 'https://username.github.io/repo/#'
+  /// - Firebase: 'https://app.web.app'
+  /// - Vercel: 'https://app.vercel.app'
+  /// - Netlify: 'https://app.netlify.app'
+  static const baseUrl = 'https://nogringo.github.io/file-transfer/#';
+
+  static String buildShareLink(String nevent, String encodedPrivateKey) {
+    return '$baseUrl${AppRoutes.fileShareRoute(nevent, encodedPrivateKey)}';
+  }
+}