fix(site): reduce reputation risk signals

[ilyar]

Summary

• remove Telegram links and icon bundle references from the public site
• add crawler-facing legitimacy copy and security.txt policy metadata
• update visual acceptance hero baselines after removing the social icon

Verification

• npm run acceptance:update
• npm run lint
• npm run lighthouse
• npm run build
• no https://t.me, Telegram, or mail.google references remain in src/public/index/dist

Vendor appeal

• submitted ChongLuaDao false-positive complaint for https://ever-guild.net/ with VirusTotal report context