Added highly visible red banner to verify HTML is loading:
Visibility Test:
- Red banner with white text at top of page
- Should appear immediately if HTML loads
- Helps diagnose if issue is HTML loading or JavaScript
Fixes:
- Black screen debugging: can now see if HTML loads at all
- WebView verification: confirms WebView is serving HTML
- Immediate feedback: no need to wait for JavaScript
Result: Can immediately see if HTML is loading or if WebView is the issue
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