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

playwright.config.ts

@@ -34,6 +34,11 @@ export default defineConfig({
     
     // Viewport size
     viewport: { width: 1280, height: 720 },
+
+    // ponytail: use locally installed headless shell (registry download is flaky on this box)
+    launchOptions: process.env.PW_EXECUTABLE
+      ? { executablePath: process.env.PW_EXECUTABLE }
+      : {},
   },
 
   // Configure projects for different browsers