Add Phase 1 Pocket Pascal UI: home, pantry, week plan, and plate.

Replace the hello-world shell with the elevated design system, bilingual screens, recipe/extras data, and the interactive Mein Teller view.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/vite.config.ts

@@ -15,9 +15,9 @@ export default defineConfig({
       manifest: {
         name: 'Pocket Pascal',
         short_name: 'Pocket Pascal',
-        description: 'A simple Hello World PWA with a React frontend and SQLite backend.',
-        theme_color: '#0a0a0a',
-        background_color: '#0a0a0a',
+        description: 'Nutrition decision aid based on Pascal’s building-block plate system.',
+        theme_color: '#fafaf7',
+        background_color: '#fafaf7',
         display: 'standalone',
         start_url: '/',
         icons: [