Hash the 40k hidden-players list and drop the old PayPal block

Hidden players are now matched by a hash of their full name or nickname
(src/hide.js) so the names aren't readable in the source or bundle.
Also removes the commented-out PayPal section from the Kingmaker
sign-up page.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

sites/40k-rankings/README.md

@@ -53,8 +53,11 @@ Everything you'd normally change is in the `CONFIG` block at the top of
 - `teamId`: the BCP team whose members are shown
 - `leagueId` / `regionId`: which ITC league and region to rank against
 - `lmcLeagueId`: the Lord Marshal Conference league used for the LMC columns
-- `blacklistNames`: players to hide from the board (full name or nickname,
-  case-insensitive)
+- `hiddenNameHashes`: players to hide from the board, stored as hashes of
+  their full name or nickname so the names aren't readable in the source. The
+  comment at the top of `src/hide.js` has a one-line command to hash a name.
+  This only obfuscates: the roster is public, so anyone could hash every
+  member's name to find who's hidden.
 - `memberIds`: fallback roster, used if the team endpoint ever stops returning
   members without auth
 - `useSample`: set to `true` to render placeholder rows with no network calls
@@ -62,6 +65,7 @@ Everything you'd normally change is in the `CONFIG` block at the top of
 ## Files
 
 - `index.html`, `src/main.js`, `src/style.css`: the page
+- `src/hide.js`: name hashing for `hiddenNameHashes`
 - `nav.html`: this site's header nav entries (see the root README)
 - `public/elo-data.json`: generated ELO data. Don't edit it by hand; the
   weekly sync overwrites it.

sites/40k-rankings/src/hide.js

@@ -0,0 +1,27 @@
+/* Hashing for CONFIG.hiddenNameHashes, so hidden players' names aren't
+   readable in the source or the deployed bundle. This is obfuscation, not
+   secrecy: the team roster is public, so anyone could hash every member's
+   name and find a match.
+
+   Get the hash for a name (full name or nickname) from sites/40k-rankings:
+     node --input-type=module -e "import { nameHash } from './src/hide.js'; console.log(nameHash('First Last'))"
+*/
+
+// cyrb53: small, fast, synchronous 53-bit string hash.
+function cyrb53(str, seed = 0) {
+  let h1 = 0xdeadbeef ^ seed, h2 = 0x41c6ce57 ^ seed;
+  for (let i = 0; i < str.length; i++) {
+    const ch = str.charCodeAt(i);
+    h1 = Math.imul(h1 ^ ch, 2654435761);
+    h2 = Math.imul(h2 ^ ch, 1597334677);
+  }
+  h1 = Math.imul(h1 ^ (h1 >>> 16), 2246822507) ^ Math.imul(h2 ^ (h2 >>> 13), 3266489909);
+  h2 = Math.imul(h2 ^ (h2 >>> 16), 2246822507) ^ Math.imul(h1 ^ (h1 >>> 13), 3266489909);
+  return 4294967296 * (2097151 & h2) + (h1 >>> 0);
+}
+
+// Case- and whitespace-insensitive, so "jane  DOE " matches "Jane Doe".
+export function nameHash(name) {
+  const norm = String(name || "").trim().replace(/\s+/g, " ").toLowerCase();
+  return norm ? cyrb53(norm).toString(16) : "";
+}

sites/40k-rankings/src/main.js

@@ -1,3 +1,5 @@
+import { nameHash } from './hide.js';
+
 /* ---- Shared: header / footer ---- */
 function loadHTML(file, elementId, callback) {
   fetch(file)
@@ -48,19 +50,20 @@ const CONFIG = {
   // Fallback roster if the team endpoint requires auth.
   memberIds: [],
 
-  // Names to hide from the leaderboard entirely (case-insensitive).
-  // Match on full name ("First Last") or nickname, whichever the player goes by.
-  blacklistNames: ["Hidden Player"],
+  // Players to hide from the leaderboard entirely, as nameHash() values of
+  // their full name ("First Last") or nickname — see src/hide.js for how to
+  // generate one. Hashed so the names aren't readable in the source.
+  hiddenNameHashes: ["5b64057a31512"],
 
   // Flip to true to preview the layout with placeholder rows (no network).
   useSample: false,
 };
 
-const BLACKLIST = new Set(CONFIG.blacklistNames.map(n => n.trim().toLowerCase()));
-function isBlacklisted(u = {}) {
-  const full = fullName(u).toLowerCase();
-  const nick = String(u.nickname || "").trim().toLowerCase();
-  return (full && BLACKLIST.has(full)) || (nick && BLACKLIST.has(nick));
+const HIDDEN = new Set(CONFIG.hiddenNameHashes);
+function isHidden(u = {}) {
+  const full = nameHash(fullName(u));
+  const nick = nameHash(u.nickname);
+  return (full && HIDDEN.has(full)) || (nick && HIDDEN.has(nick));
 }
 
 const API = "https://newprod-api.bestcoastpairings.com/v1";
@@ -290,7 +293,7 @@ function build(rows, ids) {
   const kept = [];
   for (const rec of rows) {
     const uid = rec.userId || (rec.user && rec.user.id);
-    if (uid && ids.has(uid) && !isBlacklisted(rec.user || {})) kept.push(rec);
+    if (uid && ids.has(uid) && !isHidden(rec.user || {})) kept.push(rec);
   }
   kept.sort((a, b) => Number(b.ITCPoints || 0) - Number(a.ITCPoints || 0));
   return kept;