feat: Material 3 Expressive анимации загрузки и нажатий

lib/frontend/debug/cache_section.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:material_symbols_icons/symbols.dart';
 
 import '../../core/utils/format.dart';
+import '../widgets/small_spinner.dart';
 
 class DebugCacheSection extends StatelessWidget {
   final int cacheSize;
@@ -129,14 +130,7 @@ class DebugCacheSection extends StatelessWidget {
                       ),
                     ),
                     if (clearingCache)
-                      SizedBox(
-                        width: 20,
-                        height: 20,
-                        child: CircularProgressIndicator(
-                          strokeWidth: 2,
-                          color: cs.onSurfaceVariant,
-                        ),
-                      ),
+                      SmallSpinner(size: 20, color: cs.onSurfaceVariant),
                   ],
                 ),
               ),

lib/frontend/debug/id_search_section.dart

@@ -5,6 +5,7 @@ import 'package:material_symbols_icons/symbols.dart';
 
 import '../widgets/custom_notification.dart';
 import '../widgets/glossy_pill.dart';
+import '../widgets/small_spinner.dart';
 
 class DebugIdSearchSection extends StatelessWidget {
   final TextEditingController idController;
@@ -72,11 +73,7 @@ class DebugIdSearchSection extends StatelessWidget {
               FilledButton(
                 onPressed: isSearching ? null : onSearch,
                 child: isSearching
-                    ? const SizedBox(
-                        width: 20,
-                        height: 20,
-                        child: CircularProgressIndicator(strokeWidth: 2),
-                      )
+                    ? const SmallSpinner(size: 20)
                     : const Icon(Symbols.search, size: 20),
               ),
             ],

lib/frontend/debug/sync_probe_section.dart

@@ -6,6 +6,7 @@ import '../../core/protocol/opcode_map.dart';
 import '../../core/protocol/packet.dart';
 import '../../main.dart';
 import '../widgets/glossy_pill.dart';
+import '../widgets/small_spinner.dart';
 
 class DebugSyncProbeSection extends StatefulWidget {
   const DebugSyncProbeSection({super.key});
@@ -147,11 +148,7 @@ class _DebugSyncProbeSectionState extends State<DebugSyncProbeSection> {
               ),
             ),
             child: _loading
-                ? const SizedBox(
-                    width: 20,
-                    height: 20,
-                    child: CircularProgressIndicator(strokeWidth: 2),
-                  )
+                ? const SmallSpinner(size: 20)
                 : const Text('Отправить'),
           ),
           if (_result != null) ...[