- Fix timingSafeCompare to pad buffers to equal length before comparing,
closing the content timing side-channel on length mismatch
- Replace innerHTML with textContent for error messages to prevent XSS
- Extract inline script from dashboard/index.html into dashboard/app.js
- Remove 'unsafe-inline' from script-src CSP directive
- Update security test to match new CSP policy
https://claude.ai/code/session_01GfwUNbgeMgXreFDbsNQMsS