Partner promo codes: reusable codes that add free ad credits, tracked per redemption

promos.js (promo_codes + promo_redemptions, JSON fallback): create/update codes with
credits, partner, optional cap and expiry, on/off. Redeemed once per account either
from a join link ?promo=CODE (cookie, applied at signup) or the Overview box
'Have a promo code?' (/api/my/promo/redeem). Admin > Traffic gets a Partner promo
codes card (create, toggle, uses, recent redemptions). Chatbot line added.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

chatbot.js

@@ -81,6 +81,7 @@ FACTS:
 - HOLDING TANK (Members > My line > Holding tank card): free members who joined with no sponsor wait there; a member who has switched on payouts AND bought their own $20+ package can Adopt one (first come, max 2 open adoptions, 7-day window; if the person never links a wallet or buys, they fall back into the tank; a person can be adopted twice at most). Adopting sets the sponsor, opens a chat and emails the member; their first purchase then binds to the adopter on-chain. Members can also "Release to tank" one of their own free referrals (pay it forward). Admin sees the tank under Members.
 - HOLDING TANK ALERTS: when new members land in the tank, a note at the top of every member's Overview names them (usernames) and a post goes to the team's Telegram payments topic; adopt from My line > Holding tank (your own $20 package required).
 - LEGACY WELCOME (former Faucet Wave / Tier One Ads members): they join through instantadpay.com/from/faucetwave or instantadpay.com/from/tieroneads and, if their email is on the legacy list, welcome-back credits are added automatically at signup (former advertisers 500, former earners 150; once per person; credits, not POL). They land in the holding tank like any member who joins without a sponsor.
+- PROMO CODES: partner site owners get a reusable code; a member redeems it on a join link (?promo=CODE) or in the Overview box "Have a promo code?" and receives free ad credits (amount set per code by the admin, one use per account; codes can cap uses or expire). Credits, not POL.
 - DORMANT-LEAD RESCUE: a FREE referral (no wallet, no purchase) with no message from their sponsor for 10 days triggers a warning email + dashboard flag to the sponsor ("unreached, tank in N days"); at 14 days (warning at least 4 days old) the lead moves to the holding tank and the sponsor is told. Sponsor resets the clock with a chat, a Nudge, or the "Contacted them" button (for phone/text contact). Leads whose sponsor link resolves to nobody go to the tank after a day. Nothing on-chain moves; anyone bound by a purchase never moves.
 - PIF (pay it forward) button: on a free direct or an adopted member who has linked a wallet, the sponsor taps PIF, enters an amount (suggested: the $20 package plus fees), and their OWN wallet app opens with the member's address prefilled; the POL goes wallet to wallet. The site never touches the funds; it only logs the transaction and tells the recipient with a Polygonscan link. The gift is theirs; nothing forces a purchase.
 - FOUNDING WEEK / PRE-LAUNCH (Training > Founding week checklist, /launch, members only): eight items read live from the account: username, wallet linked, payouts on, level 2 qualified (2 buyers of $20+, or Qualified Start with 2 linked positions), the leader play = level 3 (5 qualifying buyers, up to 5 linked positions; then buy from the main wallet), line banner, links + play chosen (self-marked), first two placed. Reason: unqualified levels pass up, so leaders qualify BEFORE their teams' teams buy. Countdown shows when admin sets launchAt. Never call the site 'pre-launch' publicly: it is live and paying.