feat: переделал lottie -> rlottie, с первым прогревом кадров в фоне, как в тг, чтоб лагов не было

test/rlottie_disk_cache_test.dart

@@ -0,0 +1,60 @@
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:komet/core/media/rlottie/rlottie_disk_cache.dart';
+import 'package:path_provider_platform_interface/path_provider_platform_interface.dart';
+import 'package:plugin_platform_interface/plugin_platform_interface.dart';
+
+class _FakePathProvider extends PathProviderPlatform
+    with MockPlatformInterfaceMixin {
+  _FakePathProvider(this.dir);
+  final String dir;
+  @override
+  Future<String?> getApplicationSupportPath() async => dir;
+}
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  test('disk cache round-trips rendered frames', () async {
+    final tmp = Directory.systemTemp.createTempSync('rlottie_cache_test');
+    PathProviderPlatform.instance = _FakePathProvider(tmp.path);
+
+    const px = 32;
+    const frameCount = 5;
+    final frames = List.generate(frameCount, (f) {
+      final buf = Uint8List(px * px * 4);
+      for (var i = 0; i < buf.length; i++) {
+        buf[i] = (f * 37 + i) & 0xff;
+      }
+      return buf;
+    });
+
+    const url = 'https://example.com/anim.json';
+    await RlottieDiskCache.instance.store(
+      url: url,
+      px: px,
+      frameCount: frameCount,
+      frameRate: 30,
+      durationMs: 166,
+      frames: frames,
+    );
+
+    final loaded = await RlottieDiskCache.instance.load(url, px);
+    expect(loaded, isNotNull);
+    expect(loaded!.px, px);
+    expect(loaded.frameCount, frameCount);
+    expect(loaded.frameRate, 30);
+    expect(loaded.durationMs, 166);
+    for (var f = 0; f < frameCount; f++) {
+      expect(loaded.frames[f], orderedEquals(frames[f]),
+          reason: 'frame $f bytes preserved');
+    }
+
+    expect(await RlottieDiskCache.instance.load('https://other/x.json', px),
+        isNull);
+
+    tmp.deleteSync(recursive: true);
+  });
+}