[szhaomsft]

Summary

• Add a footer link displaying the short source commit hash for each GitHub Pages deployment, with a full-hash tooltip and a link to the exact commit.
• Stamp the deployed SHA from GitHub Actions metadata; show an explicit local-preview label when not deployed and fail deployment if the expected footer marker is missing.
• Add an original green voice-wave SVG favicon matching the calculator theme, wire it into the HTML, and serve it locally with the correct SVG MIME type.
• Publish only the six required browser assets, including the favicon; keep server code and other repository files out of the Pages artifact.
• Correct the remaining stale methodology text to match the previously updated 10 input / 20 output audio tokens-per-second defaults.

Validation

• All 22 calculator tests pass; server syntax and whitespace checks pass.
• Executed the workflow's actual staging script and verified the short hash, full commit URL, SVG, favicon reference, and exact six-file artifact allowlist.
• Confirmed favicon GET and HEAD requests return HTTP 200 with image/svg+xml content type.

Deployment

The existing Pages workflow publishes after merge into main at https://microsoft.github.io/voice-agent/ .

Based on current main; unrelated local files are excluded.