docs: restructure TASKS.md into a catalog — one file per task in TASKS/

TASKS.md is now the index (status table, open items, research pointer).
33 files: 32 task files + 1 research facts file. The full take-saga
narrative and all design decisions are preserved verbatim; the catalog
makes the queue readable without opening every task body. Schema and
AGENTS.md updated to reflect the new layout.

TASKS/task-10-monetization.md

@@ -0,0 +1,39 @@
+# TASK 10 — Monetization: watermark-only subscription + Polar billing
+
+> Catalog: [`TASKS.md`](../TASKS.md) — status and requirements live here.
+
+
+**Goal:** annual subscription via Polar.sh that removes the branding watermark. All features are
+free — the only difference between free and paid is the watermark.
+
+**Related work — monetization awareness (2026-09-01, ungated, free):** this task's billing is the
+*payer* side; the *product* also carries built-in, ungated monetization awareness for every creator —
+reward-event capture (all 7 `liveChatMessage` reward event types → canonical `RewardEvent` → SQLite
+persistence), per-session/broadcast reports (members, Super Chat $, stickers, gifts, milestones — the
+in-app replacement for the emailed "stream activity report"), and a journey tracker (position % +
+ETA vs. versioned, date-aware YPP thresholds; the Tier-2 bar doubles for new applicants 2027-02-01).
+Details and design notes: `ai.md` → Monetization. This is tracked as related work under this task's
+narrative, not a separate task number — it ships in its own code slices with one integration test each.
+**Scope: v1** (2026-09-01 complete-v1 ruling — there is no v1.x): slice order = reward-event capture →
+session report → journey tracker → Alerts (TASK 3 item 20).
+
+**Business details (pricing, Polar product/checkout/discounts) in `MONETIZATION.md` (gitignored).**
+
+**Polar product:** `d105dfa1-497e-423b-8cd4-e0ee2e3abbc0` (LlamaCasty, $99/yr, currently `private`)
+**Checkout:** `llamacasty.com` → Polar hosted page (~80% configured)
+**Discounts:** `LLAMAFOUNDER` (100% off, 50 uses, `once`), `LLAMA50` (50% off, 12 months, unlimited)
+**Org ID:** `c05fb364-b967-4f6c-adf2-8a144e46d085` (org-scoped OAT — `organization_id` can be omitted from API calls)
+**Key prefix:** `LCYT-`
+**Validate endpoint:** `POST https://api.polar.sh/v1/customer-portal/license-keys/validate` (no auth required for client-side validation)
+
+### Status: 🔶 In progress — steps 1–7 shipped, Velopack update URL pending
+
+1. ✅ **Billing provider** — Polar (polar.sh) chosen and configured. Product, price, license key benefit, discounts, checkout link all created.
+2. ✅ **License key entry + verification UI** — About overlay swap panel (same pattern as Licenses panel). Text input + "Activate" button + status message. "Enter License Key" button in the hub.
+3. ✅ **Offline entitlement** — `LayoutStore` Settings table: `LicenseKey`, `LicenseValidatedAt`, `IsPremium`. 14-day offline grace period. Startup re-validates online, falls back to cache.
+4. ✅ **BrandFlash → watermark toggle** — `IsPremium` property setter flips `BrandFlashEnabled = !value`. Flash stops immediately on premium activation. Flash asset VideoFrame rendering deferred to TASK 4 compositor.
+5. ✅ **Remove social slot locks** — all 6 social bar slots open to everyone (no `IsPremium` gating on slots 3-6) — shipped as TASK 10c
+6. ✅ **"Unlock Premium" button** — `PremiumUrl` set to Polar checkout; `IsPremiumAvailable` is true; button lights up in the About hub.
+7. ✅ **Renewal/lapse handling** — startup re-validates against Polar API. Lapse → `IsPremium = false` → flash returns. Grace period: 14 days offline.
+8. 🔶 **Velopack auto-updates** — NuGet packages + bootstrap in `App.xaml.cs`. Update URL self-hosted on DO droplet (pending configuration).
+