test(19.6.1-03): SPA trigger, record lock and footer wrap tests

- trigger.test.ts: triggerState and applyTriggers
- FormView: disable, absent-controller and hide-tab backstops, the live
  announcement
- PermissionEditorField and formState: record-locked rows, notes and the
  payload omission, record lock over request lock, read-only screens
- PreviewView: hide removes, disable shows no note
- browser record-actions-wrap at 1024px; vitest.browser.config.ts gains
  the Tailwind plugin so the footer is laid out with the admin's CSS

admin/vitest.browser.config.ts

@@ -1,12 +1,14 @@
 import { defineConfig } from 'vitest/config'
 import vue from '@vitejs/plugin-vue'
+import tailwindcss from '@tailwindcss/vite'
 
 // Vitest browser mode in Playwright Chromium (npm run test:browser), for tests
 // that need a real engine: happy-dom reproduces neither DOM clobbering nor
 // DOMPurify's walk. tests/setup.ts is a happy-dom shim and is not loaded here.
 // Decision note: .planning/notes/2026-10-12-admin-display-sanitizer-dompurify.md
+// Tailwind compiles src/styles/main.css for layout tests (record-actions-wrap).
 export default defineConfig({
-  plugins: [vue()],
+  plugins: [vue(), tailwindcss()],
   test: {
     include: ['tests/browser/**/*.test.ts'],
     restoreMocks: true,