ui: Add a basic implementation of the video inline widget

lib/ui/service/data.dart

@@ -0,0 +1,19 @@
+import "package:flutter/material.dart";
+import "package:external_path/external_path.dart";
+import "package:path/path.dart" as pathlib;
+
+class UIDataService {
+  late String _thumbnailBase;
+
+  UIDataService();
+
+  Future<void> init() async {
+    WidgetsFlutterBinding.ensureInitialized();
+
+    final base = await ExternalPath.getExternalStoragePublicDirectory(ExternalPath.DIRECTORY_PICTURES);
+    _thumbnailBase = pathlib.join(base, "Moxxy", ".thumbnail");
+  }
+
+  // The base path for thumbnails
+  String get thumbnailBase => _thumbnailBase;
+}