Rebrand public site to RM Circle Team Build (remove Crypto Team Build Network)

Public promo is now RM-Circle-only; the Crypto Team Build Network is learned
after joining, not surfaced to prospects.
- nav brand "Crypto Team Build" -> "RM Circle" (subtitle "Premium Team Build")
- all <title>, og:site_name, twitter meta, footers, disclaimers, 404, chatbot
  system prompt + canned answers, config siteName/supportLabel swept
- removed "a project of the Crypto Team Build Network" framing from prose
- banners regenerated: eyebrow now "The RM Circle · Polygon" (was Crypto Team Build)
- og-card.jpg regenerated (was "CRYPTO TEAM BUILD NETWORK PRESENTS")
- roadmap.webp already RM-Circle branded (no change needed)
- social posts/swipes: #CryptoTeamBuild -> #RMCircle, "crypto team build" -> "RM Circle team build"

Videos still reference old branding (VO + embedded site screenshot) — rebuilt next.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

public/chat.js

@@ -11,7 +11,7 @@
 
   const KB=[
     {k:['what is','rm circle','about','this site','this project','crypto team build','who are you','network'],
-     a:()=>`The RM Circle is a team build project of the <strong>Crypto Team Build Network</strong>. We enter the RM Circle dApp at the Premium tier (${pol()} POL on Polygon) and build as one team: each member gets exactly 2 directs, then helps those 2 get their 2 — building depth instead of width. Start with the <a href="/training">training videos</a>.`},
+     a:()=>`We enter the RM Circle dApp at the Premium tier (${pol()} POL on Polygon) and build as one team: each member gets exactly 2 directs, then helps those 2 get their 2 — building depth instead of width. Start with the <a href="/training">training videos</a>.`},
     {k:['how does it work','strategy','how it works','plan','roadmap','system','duplicate','duplication'],
      a:()=>`The core strategy: <strong>get your 2, retire your link, help your 2 get their 2, upgrade with profits, repeat.</strong> Once a position has 2 directs it's qualified — we stop using its link and move the team's effort down to the next positions. The full picture is in <a href="/training">Video 1 of the training</a>, and the roadmap poster is on the <a href="/">home page</a>.`},
     {k:['cost','price','entry','how much','362','fee','pol needed','expensive'],