все к лучшему

src/app/App.tsx

@@ -1,8 +1,13 @@
-import { FC } from 'react'
+import { FC, useEffect } from 'react'
 
 import { Navigate, Route, Routes } from 'react-router-dom'
 
 import { TemplateProvider } from '@/entitiy/template/model/TemplateContext'
+import {
+  setGlobalToastContext,
+  ToastProvider,
+  useToast,
+} from '@/lib/hooks/useToast'
 import { ElementsCreation } from '@/page/ElementsCreation'
 import { ProtocolCreation } from '@/page/ProtocolCreation'
 import { TemplateEditPage } from '@/page/TemplateEditPage'
@@ -11,29 +16,44 @@ import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
 import { Layout } from './Layout'
 
 const queryClient = new QueryClient()
+
+// Компонент для инициализации глобального контекста toast
+const ToastInitializer: FC = () => {
+  const toast = useToast()
+
+  useEffect(() => {
+    setGlobalToastContext(toast)
+  }, [toast])
+
+  return null
+}
+
 const App: FC = () => {
   return (
     <QueryClientProvider client={queryClient}>
-      <TemplateProvider>
-        <Routes>
-          <Route path="/" element={<Layout />}>
-            <Route index element={<Navigate to="/templates" replace />} />
-            <Route path="templates/" element={<TemplatesOverviewPage />} />
-            <Route
-              path="templates/:templateId/edit"
-              element={<TemplateEditPage />}
-            />
-            <Route
-              path="templates/:templateId/elements"
-              element={<ElementsCreation />}
-            />
-            <Route
-              path="templates/:templateId/protocols"
-              element={<ProtocolCreation />}
-            />
-          </Route>
-        </Routes>
-      </TemplateProvider>
+      <ToastProvider>
+        <ToastInitializer />
+        <TemplateProvider>
+          <Routes>
+            <Route path="/" element={<Layout />}>
+              <Route index element={<Navigate to="/templates" replace />} />
+              <Route path="templates/" element={<TemplatesOverviewPage />} />
+              <Route
+                path="templates/:templateId/edit"
+                element={<TemplateEditPage />}
+              />
+              <Route
+                path="templates/:templateId/elements"
+                element={<ElementsCreation />}
+              />
+              <Route
+                path="templates/:templateId/protocols"
+                element={<ProtocolCreation />}
+              />
+            </Route>
+          </Routes>
+        </TemplateProvider>
+      </ToastProvider>
     </QueryClientProvider>
   )
 }