refactor: Same animations everywhere in app

lib/widgets/connection_status_header.dart

@@ -5,6 +5,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/l10n.dart';
 import 'package:matrix/matrix.dart';
 
+import '../config/themes.dart';
 import '../utils/localized_exception_extension.dart';
 import 'matrix.dart';
 
@@ -42,8 +43,8 @@ class ConnectionStatusHeaderState extends State<ConnectionStatusHeader> {
         client.prevBatch != null;
 
     return AnimatedContainer(
-      duration: const Duration(milliseconds: 200),
-      curve: Curves.bounceInOut,
+      duration: FluffyThemes.animationDuration,
+      curve: FluffyThemes.animationCurve,
       height: hide ? 0 : 36,
       clipBehavior: Clip.hardEdge,
       decoration: BoxDecoration(color: Theme.of(context).colorScheme.surface),

lib/widgets/layouts/side_view_layout.dart

@@ -31,7 +31,8 @@ class SideViewLayout extends StatelessWidget {
                     color: Theme.of(context).dividerColor,
                   ),
                   AnimatedContainer(
-                    duration: const Duration(milliseconds: 300),
+                    duration: FluffyThemes.animationDuration,
+                    curve: FluffyThemes.animationCurve,
                     clipBehavior: Clip.antiAlias,
                     decoration: const BoxDecoration(),
                     width: hideSideView ? 0 : 360.0,

lib/widgets/mxc_image.dart

@@ -5,6 +5,7 @@ import 'package:flutter/material.dart';
 import 'package:http/http.dart' as http;
 import 'package:matrix/matrix.dart';
 
+import 'package:fluffychat/config/themes.dart';
 import 'package:fluffychat/utils/matrix_sdk_extensions/matrix_file_extension.dart';
 import 'package:fluffychat/widgets/matrix.dart';
 
@@ -32,9 +33,9 @@ class MxcImage extends StatefulWidget {
     this.placeholder,
     this.isThumbnail = true,
     this.animated = false,
-    this.animationDuration = const Duration(milliseconds: 200),
+    this.animationDuration = FluffyThemes.animationDuration,
     this.retryDuration = const Duration(seconds: 2),
-    this.animationCurve = Curves.linear,
+    this.animationCurve = FluffyThemes.animationCurve,
     this.thumbnailMethod = ThumbnailMethod.scale,
     this.cacheKey,
     Key? key,