feat: Implement accessible SFTP file browser and native editor

lib/ui/views/terminal_view.dart

@@ -6,6 +6,7 @@ import 'package:wakelock_plus/wakelock_plus.dart';
 import 'package:accessible_terminal/state/terminal_provider.dart';
 import 'package:accessible_terminal/models/terminal_line.dart';
 import 'package:accessible_terminal/ui/widgets/ansi_text_parser.dart';
+import 'package:accessible_terminal/ui/views/file_browser_view.dart';
 
 class TerminalView extends ConsumerStatefulWidget {
   const TerminalView({super.key});
@@ -114,7 +115,11 @@ class _TerminalViewState extends ConsumerState<TerminalView> {
         final newLine = next.first;
         final cleanText = AnsiTextParser.strip(newLine.text);
         if (cleanText.trim().isNotEmpty) {
-          SemanticsService.announce(cleanText, TextDirection.ltr);
+          SemanticsService.sendAnnouncement(
+            View.of(context),
+            cleanText,
+            TextDirection.ltr,
+          );
         }
       }
     });
@@ -135,6 +140,19 @@ class _TerminalViewState extends ConsumerState<TerminalView> {
               ),
             ],
           ),
+          Semantics(
+            label: 'Open File Browser',
+            button: true,
+            child: IconButton(
+              icon: const Icon(Icons.folder_open),
+              onPressed: () {
+                Navigator.push(
+                  context,
+                  MaterialPageRoute(builder: (context) => const FileBrowserView()),
+                );
+              },
+            ),
+          ),
           Semantics(
             label: 'Disconnect',
             button: true,