copy(price): the launch price ends on an event we control, not on Valve's queue

The promo read 'until April 1, 2027', which is a public promise tied to a review queue outside our
control: identity verification and the tax interview are in Valve's hands (they quote up to 30 business
days), and the store page and build reviews follow. If any of that slips, the date becomes untrue.

It now reads '30 days after the store page goes live — after that $99, locked for life', in the About
box and in commercial.md, so the claim cannot be wrong however long Valve takes.

Also recorded: the $100 Steam Direct fee is PAID (creator, 2026-11-05); a store page can be configured
once identity clears. The launch-price deadline no longer depends on Valve's calendar.

docs/ai/commercial.md

@@ -1,7 +1,9 @@
 ## Price (creator ruling 2026-11-05)
 
 - **Launch price $79** — one-time purchase, lifetime licence, no subscription, no account, no tracking.
-- **Promotion ends April 1, 2027**; after that the price is **$99, locked for life**.
+- **Promotion ends 30 days after the store page goes live** (revised 2026-11-05 — the earlier fixed date,
+  April 1 2027, depended on Valve's review queue, which is outside our control); after that the price is
+  **$99, locked for life**.
 - Free tier: livestream and record at **30 fps**. Paid unlocks **60 fps** for both.
 - The numbers live in `ViewModels/MainViewModel.Overlays.cs` (`LaunchPrice`, `StandardPrice`,
   `LaunchPriceEndsLabel`) so the About box, the site copy and this file cannot drift apart. Change them