Add payments video to training + new Promo Tools page (/tools)

Training: new "Video 5 · Why you're not getting paid yet" card with the
payments teaching video (+ poster). Promo Tools page at /tools (noindex,
unlinked from public nav — a team resource): share-ready video clips
with copy-link buttons, a personal invite-link builder, and three
compliant email/message swipes; banners noted as generate-on-request.
Chatbot gains a promo-tools answer. Old scroll-only clip is superseded
by the combined cut (retire it).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

public/chat.js

@@ -52,6 +52,8 @@
      a:()=>`All four training videos are on the <a href="/training">Training page</a>: (1) How the team build works, (2) Create your MetaMask wallet, (3) Funding your wallet, (4) Buying the Premium position. Watch them in order.`},
     {k:['seed phrase','secret recovery','recovery phrase','private key','12 words','passphrase'],
      a:()=>`<strong>Never share your Secret Recovery Phrase or private keys with anyone</strong> — not this site, not a sponsor, not "support". Anyone asking for it is trying to steal your funds. MetaMask will never ask for it either, except when you restore a wallet yourself.`},
+    {k:['promote','promo','promo tools','tools','swipe','swipes','email swipe','banners','marketing','share this','invite people','video clips','how do i share'],
+     a:()=>`Grab share-ready promo tools at <a href="/tools">rmcircle.team/tools</a>: the promo <strong>videos</strong> (tap Copy link to share), <strong>email &amp; message swipes</strong> you can personalize, and a builder for your <strong>personal invite link</strong>. Banner graphics can be generated on request. Keep it honest — point people to the videos and the <a href="/contract">contract review</a>, never promise income.`},
     {k:['telegram','group','chat','human','support','contact','talk','someone','admin','help me'],
      a:()=>`For live help from the team, join the Telegram group: ${tgLink()}. Tell them where you're stuck and someone will walk you through it.`},
     {k:['after join','next','what happens','confirmed','joined','i bought','i am in'],