refactor: replace 'sonner' toast import with local toast component (#177)

packages/ui/src/components/session/DirectoryExplorerDialog.tsx

@@ -14,7 +14,7 @@ import { useDirectoryStore } from '@/stores/useDirectoryStore';
 import { useProjectsStore } from '@/stores/useProjectsStore';
 import { useFileSystemAccess } from '@/hooks/useFileSystemAccess';
 import { cn, formatPathForDisplay } from '@/lib/utils';
-import { toast } from 'sonner';
+import { toast } from '@/components/ui';
 import {
   RiCheckboxBlankLine,
   RiCheckboxLine,

packages/ui/src/components/session/SessionDialogs.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
 import { Button } from '@/components/ui/button';
-import { toast } from 'sonner';
+import { toast } from '@/components/ui';
 
 import {
     Dialog,

packages/ui/src/components/session/SessionSidebar.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
 import type { Session } from '@opencode-ai/sdk/v2';
-import { toast } from 'sonner';
+import { toast } from '@/components/ui';
 import {
   DndContext,
   DragOverlay,