chore(deps): consolidate Dependabot updates incl. astro 7 / vite 8 migration (#117)

Combines the two open Dependabot PRs into a single change:
- astro 6.4.8 -> 7.0.3 (#116)
- minor-and-patch group: framer-motion, preact, tailwindcss,
  @playwright/test, @tailwindcss/postcss->vite, @types/node,
  baseline-browser-mapping (#115)

Astro 7 upgrades to Vite 8, which broke the build:
- Bump the vite override from ^7 to ^8 (the ^7 pin from #114 forced a
  Vite/Astro mismatch -> 'rollupOptions.input should not be an html
  file' SSR error).
- Migrate Tailwind v4 from the PostCSS plugin to the official
  @tailwindcss/vite plugin. Vite 8's CSS pipeline could not resolve
  '@import "tailwindcss"' via postcss-import. Add @tailwindcss/vite,
  wire it into astro.config, drop @tailwindcss/postcss and
  postcss.config.mjs.

Ignore Playwright output dirs (test-results/, playwright-report/).

Verified with Node: astro build, astro check (0 errors), and the
Playwright suite all pass.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: jldeen

.gitignore

@@ -22,3 +22,5 @@ pnpm-debug.log*
 
 # jetbrains setting folder
 .idea/
+test-results/
+playwright-report/

astro.config.mjs

@@ -2,6 +2,7 @@
 import { defineConfig } from 'astro/config';
 import { loadEnv } from 'vite';
 import preact from '@astrojs/preact';
+import tailwindcss from '@tailwindcss/vite';
 
 // Load environment variables
 const { SITE, BASE_URL } = loadEnv(process.env.NODE_ENV || 'development', process.cwd(), "");
@@ -21,5 +22,10 @@ export default defineConfig({
     preact({ compat: true })
   ],
 
+  // Vite plugins
+  vite: {
+    plugins: [tailwindcss()]
+  },
+
 
 });