docs: dedicated ticket-voucher lookup page under fluent

Move the ticket-voucher API into its own standalone doc
(docs/fluentforms-ticket-vouchers.md) — endpoint, 0/1/2 rules, config, form
snippet, and curl test — so it's easy to find and hand off for the lookup. The
donor-discount doc now links to it instead of duplicating the section.

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

docs/fluentforms-donor-discount.md

@@ -147,94 +147,6 @@ member/donor distinction.
 
 ## Ticket-voucher entitlement
 
-Returns how many **free tickets** a donor has earned from their giving, based on
-donations **on/after a cutoff date** (default `2025-09-04` — "9/4 last year").
-
-```
-GET https://scan.beartariacampgrounds.com/api/public/ticket-vouchers?key=<SECRET>&email=<email>
--> {"vouchers": 0}   |   {"vouchers": 1}   |   {"vouchers": 2}
-```
-
-**Rules** (donations summed on/after the cutoff):
-
-| Total since cutoff | Vouchers |
-|---|---|
-| ≥ $1000 | 2 |
-| ≥ $400  | 1 |
-| otherwise | 0 |
-
-**Config** (backend `.env`):
-
-| Var | Default | Meaning |
-|---|---|---|
-| `VOUCHER_SINCE` | `2025-09-04` | Only donations on/after this date count. Bump each year. |
-| `VOUCHER_TIER1_MIN` | `400` | Dollar total for 1 voucher |
-| `VOUCHER_TIER2_MIN` | `1000` | Dollar total for 2 vouchers |
-
-> The count is computed from the **dated transaction tables** (online + offline)
-> — the master-list rollups have no dates. Only `Paid` transactions count.
-
-### Form snippet
-
-Displays the voucher count and (optionally) sets a hidden field / caps a
-quantity. Same pattern as the discount lookup — paste into a Custom HTML element
-and set `KEY`.
-
-```html
-<div id="voucher-status" style="margin:6px 0;font-size:14px;font-weight:600;"></div>
-<script>
-(function () {
-  var API = "https://scan.beartariacampgrounds.com/api/public/ticket-vouchers";
-  var KEY = "REPLACE_WITH_PUBLIC_LOOKUP_SECRET";
-  var EMAIL_SELECTOR = 'input[name="email"]';
-  var statusEl = document.getElementById("voucher-status");
-  var last = "";
-
-  function show(n) {
-    if (n > 0) {
-      statusEl.textContent = "🎟️ You've earned " + n + " free ticket" + (n > 1 ? "s" : "") + "!";
-      statusEl.style.color = "#1b7f3b";
-    } else {
-      statusEl.textContent = "";
-    }
-    // Optional: write n into a hidden field named "free_tickets" for conditional
-    // logic / to cap a quantity. (Uses the native setter so FF's Vue model sees it.)
-    var el = document.querySelector('input[name="free_tickets"]');
-    if (el) {
-      var proto = Object.getOwnPropertyDescriptor(Object.getPrototypeOf(el), "value");
-      (proto && proto.set ? proto.set : function (v) { el.value = v; }).call(el, String(n));
-      el.dispatchEvent(new Event("input", { bubbles: true }));
-      el.dispatchEvent(new Event("change", { bubbles: true }));
-    }
-  }
-
-  function check(email) {
-    if (!email || email === last) return;
-    last = email;
-    fetch(API + "?key=" + encodeURIComponent(KEY) + "&email=" + encodeURIComponent(email))
-      .then(function (r) { return r.json(); })
-      .then(function (d) { show(d && d.vouchers ? d.vouchers : 0); })
-      .catch(function () { show(0); });
-  }
-
-  function bind() {
-    var el = document.querySelector(EMAIL_SELECTOR);
-    if (!el) { return setTimeout(bind, 500); }
-    el.addEventListener("blur", function () { check(el.value.trim().toLowerCase()); });
-  }
-  bind();
-})();
-</script>
-```
-
-### Test
-
-```
-curl "https://scan.beartariacampgrounds.com/api/public/ticket-vouchers?key=<SECRET>&email=<a-real-donor-email>"
-# -> {"vouchers":2}   (>= $1000 since the cutoff)
-```
-
-> **Heads-up on the cutoff:** with `VOUCHER_SINCE=2025-09-04`, everyone currently
-> returns `0` because the donation data in NocoDB ends **2025-05-22** — there are
-> no transactions after the cutoff yet. Adjust `VOUCHER_SINCE` (or wait for new
-> donations to sync) so the window matches real giving.
+The donor **ticket-voucher lookup** (how many free tickets a donor earned) is a
+separate endpoint documented on its own page:
+[`fluentforms-ticket-vouchers.md`](./fluentforms-ticket-vouchers.md).