Add: Clear search

lib/pages/main.dart

@@ -121,6 +121,9 @@ class _MainPageState extends State<MainPage> {
                   child: TextField(
                     onChanged: (value) => setState(() {
                       searchText = value;
+                      if (searchText == '') {
+                        _onSearch();
+                      }
                     }),
                     decoration: InputDecoration(
                       hintText: 'Поиск',
@@ -241,6 +244,11 @@ class _MainPageState extends State<MainPage> {
                   builder: (context) => const BasketPage(),
                 )),
                 highlightElevation: 0,
+                hoverColor: Colors.transparent,
+                focusColor: Colors.transparent,
+                hoverElevation: 0,
+                focusElevation: 0,
+                splashColor: Colors.transparent,
                 backgroundColor: Colors.transparent,
                 elevation: 0,
                 child: CircleAvatar(