feat: tablet-first UX overhaul with wizard improvements

- Tablet-first responsive scoreboard: whole player card is tap target
- Per-step wizard backgrounds and live summary panel
- Larger touch targets, safe-area handling, reduced-motion support
- German UI error strings in App.tsx
- Updated SOUL.md and README.md for current architecture
- Cleanup: removed legacy components, .cursor/, UI_IMPROVEMENTS.md
- Renamed package to bscscore, fixed TOTAL_WIZARD_STEPS

public/manifest.webmanifest

@@ -1,7 +1,7 @@
 {
   "name": "BSC Score",
   "short_name": "BSC Score",
-  "description": "Professional pool and billiards scoring application",
+  "description": "Live-Scoring für 8-, 9- und 10-Ball am Billardtisch.",
   "start_url": "/",
   "scope": "/",
   "display": "fullscreen",

public/sw.js

@@ -1,4 +1,4 @@
-const CACHE_NAME = 'bscscore-v2.1.1';
+const CACHE_NAME = 'bscscore-v2.2.1';
 const APP_SHELL = [
   '/',
   '/index.html',