refactor(web): drop headless-ui, migrate overlay to dify-ui (#35963)

Co-authored-by: CodingOnStar <hanxujiang@dify.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: yyh <yuanyouhuilyz@gmail.com>
Co-authored-by: yyh <92089059+lyzno1@users.noreply.github.com>

web/__tests__/develop/api-key-management-flow.test.tsx

@@ -13,7 +13,7 @@ import userEvent from '@testing-library/user-event'
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import ApiServer from '@/app/components/develop/ApiServer'
 
-// ---------- fake timers (HeadlessUI Dialog transitions) ----------
+// ---------- fake timers (modal transitions) ----------
 beforeEach(() => {
   vi.useFakeTimers({ shouldAdvanceTime: true })
 })
@@ -100,7 +100,7 @@ describe('API Key management flow', () => {
     })
     await flushUI()
 
-    // SecretKeyModal should render with real HeadlessUI Dialog
+    // SecretKeyModal should render with real modal content
     await waitFor(() => {
       expect(screen.getByText('appApi.apiKeyModal.apiSecretKey')).toBeInTheDocument()
       expect(screen.getByText('appApi.apiKeyModal.apiSecretKeyTips')).toBeInTheDocument()