amitwh 94506ccb00 security: harden CSP, add path traversal protection, improve accessibility ...

Security fixes:
- Remove external CDN sources from CSP (cdn.jsdelivr.net, cdnjs.cloudflare.com)
- Add path validation functions to prevent path traversal attacks
- Block access to sensitive system directories
- Add isPathAccessible() check for file operations

UI/Accessibility fixes:
- Increase tab close button from 16px to 24px for better touch targets
- Add focus-visible styles for keyboard navigation
- Add ARIA labels to all toolbar buttons
- Add aria-hidden="true" to decorative SVG icons
- Add role="tablist" and role="tab" to tab bar
- Fix duplicate font-size declaration in .preview-content

Reports generated:
- Security vulnerability scan (10 findings)
- STRIDE threat model with MITRE ATT&CK mapping
- Comprehensive UI design review (40 issues)

Amit Haridas

2026-03-15 00:38:58 +05:30

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security: harden CSP, add path traversal protection, improve accessibility

2026-03-15 00:38:58 +05:30