[NetVar1337]

What

This PR only changes copy. It replaces the PurpleAILAB / Purple AI LAB branding with BitterSecurity.

• public/index.html: <title>, og:title, logo alt text (nav and hero), the nav wordmark (Bitter<b>Security</b>), the hero section label, and the footer © (now © 2026 BitterSecurity). Every github.com/PurpleAILAB/Decepticon link now points to github.com/BitterSecurity/Decepticon. GitHub already 301-redirects the old URL.
• README.md: title and company blurb.
• package.json name changed to bittersecurity-website. The workspace name in bun.lock was updated to match, and bun install --frozen-lockfile still passes.
• src/index.ts: the server startup log line.

Intentionally not changed (follow-ups)

• src/db.ts:11 still uses data/purpleailab.db. Renaming it would orphan existing waitlist/contact data. If we rename later, it needs a migration step.
• LICENSE:188 and README.md:144 still say Copyright 2026 Purple AI LAB AS. This is the legal entity on the license, not just a brand string, so it needs confirmation before it changes.
• The footer drops the "AS" suffix. Please confirm the legal entity name. If it should be BitterSecurity AS, I can make that a one-line change.
• README.md:120 (purpleailab.com/ in the project tree) is the repo name, which has not changed.
• .github/workflows/ci.yml:30 uses the local Docker build tag purpleailab-website:<sha>. This is CI/infra and is never pushed.
• Domains, the redirect from purpleailab.com to the new host, and the deploy config are untouched. That will be a separate PR.
• Brand spelling: the docs site and DESIGN.md show the company as "Bitter Security" (with a space) and use BitterSecurity for the GitHub org. This PR uses BitterSecurity as requested. Tell me if the display copy should be "Bitter Security" instead.
• "Blue + Red = Purple", "purple-team", .t-purple and the Three.js PURPLE color are color and concept references, not the brand.

Local checks (box, 2026-10-26)

Check	Result	Log
bun install / --frozen-lockfile	OK	—
bunx tsc --noEmit	exit 0	/workspace/out/local-ci-208db06/tsc.log
Server on :3917, curl /	200, <title>BitterSecurity — Agentic Cybersecurity Harness</title>, 0 old-brand matches	/workspace/out/local-ci-208db06/{curl.log,server.log,index.html}