Add events.gateway-gamers.net: upcoming events across BCP circuits

New 5th site in the monorepo, following the same shared header/footer/
images pattern as the others. Shows upcoming events for a configurable
list of BCP circuits (CONFIG.circuits in sites/events/src/main.js) —
adding a circuit is a one-line edit.

Data comes from the BCP API (`GET /v1/events?leagueId=<circuitId>`,
same auth-free headers the other sites already use) — "circuit" in
BCP's frontend URLs maps to `leagueId` in the API, confirmed via
/v1/leagues/<id> returning circuitLeague: true. Paginates newest-date-
first and stops once a full page has entirely concluded, so it doesn't
walk a circuit's whole history just to find the handful of upcoming
events. Verified against the live API for all 4 configured circuits
before writing this commit.

Nav cross-links with scouting only (per request), not the other 3
sites. nginx conf follows the same shared-asset-alias pattern as the
rest; TLS/DNS for the new subdomain still need to be provisioned
before it can go live (see follow-up).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SBzcNkW7JcYipnAX6HfgmK

sites/events/public/header.html

@@ -0,0 +1,59 @@
+<header class="bg-base-300 shadow-lg">
+
+  <!-- Hero: carousel background + centered logo -->
+  <div class="relative overflow-hidden min-h-64 py-10 flex items-center justify-center">
+
+    <!-- Carousel images -->
+    <div id="hero-carousel" class="absolute inset-0">
+      <img src="/images/photo1.jpg" class="carousel-slide absolute inset-0 w-full h-full object-cover opacity-0 transition-opacity duration-1000" />
+      <img src="/images/photo2.jpg" class="carousel-slide absolute inset-0 w-full h-full object-cover opacity-0 transition-opacity duration-1000" />
+      <img src="/images/photo3.jpg" class="carousel-slide absolute inset-0 w-full h-full object-cover opacity-0 transition-opacity duration-1000" />
+      <img src="/images/photo4.jpg" class="carousel-slide absolute inset-0 w-full h-full object-cover opacity-0 transition-opacity duration-1000" />
+      <img src="/images/photo5.jpg" class="carousel-slide absolute inset-0 w-full h-full object-cover opacity-0 transition-opacity duration-1000" />
+    </div>
+
+    <!-- Overlay so logo stays readable over busy images -->
+    <div class="absolute inset-0 bg-black/40"></div>
+
+    <!-- Logo -->
+    <div class="relative z-10">
+      <a href="/index.html">
+        <img src="/images/logo.png" alt="Gateway Gamers" class="h-48 w-auto drop-shadow-2xl" />
+      </a>
+    </div>
+
+  </div>
+
+  <!-- Nav row -->
+  <div class="navbar bg-base-200 px-4 min-h-0 py-2">
+    <div class="navbar-center hidden lg:flex flex-1 justify-center">
+      <ul class="menu menu-horizontal px-1 gap-1">
+        <li><a href="/index.html">Events</a></li>
+        <li><a href="https://scouting.gateway-gamers.net">Scouting</a></li>
+      </ul>
+    </div>
+    <div class="navbar-end gap-2 ml-auto">
+      <label class="swap swap-rotate btn btn-ghost btn-circle" title="Toggle light/dark">
+        <input type="checkbox" class="theme-controller" value="light" />
+        <svg class="swap-off h-5 w-5 fill-current" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
+          <path d="M21.64 13a1 1 0 0 0-1.27-.66 8.5 8.5 0 0 1-10.71-10.71 1 1 0 0 0-1.32-1.27A10 10 0 1 0 22 14.29a1 1 0 0 0-.36-1.29z"/>
+        </svg>
+        <svg class="swap-on h-5 w-5 fill-current" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
+          <path d="M5.64 17l-.71.71a1 1 0 0 0 1.41 1.41l.71-.71A1 1 0 0 0 5.64 17zM5 12a1 1 0 0 0-1-1H3a1 1 0 0 0 0 2h1a1 1 0 0 0 1-1zm7-7a1 1 0 0 0 1-1V3a1 1 0 0 0-2 0v1a1 1 0 0 0 1 1zM5.64 7.05a1 1 0 0 0 .7.29 1 1 0 0 0 .71-.29 1 1 0 0 0 0-1.41l-.71-.71a1 1 0 0 0-1.41 1.41zm12 .29a1 1 0 0 0 .7-.29l.71-.71a1 1 0 0 0-1.41-1.41l-.71.71a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29zM21 11h-1a1 1 0 0 0 0 2h1a1 1 0 0 0 0-2zm-9 8a1 1 0 0 0-1 1v1a1 1 0 0 0 2 0v-1a1 1 0 0 0-1-1zm6.36-2a1 1 0 0 0-1.41 1.41l.71.71a1 1 0 0 0 1.41-1.41zM12 6.5a5.5 5.5 0 1 0 5.5 5.5A5.51 5.51 0 0 0 12 6.5z"/>
+        </svg>
+      </label>
+      <div class="dropdown dropdown-end lg:hidden">
+        <label tabindex="0" class="btn btn-ghost btn-circle">
+          <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6h16M4 12h16M4 18h16" />
+          </svg>
+        </label>
+        <ul tabindex="0" class="menu menu-sm dropdown-content mt-3 z-[1] p-2 shadow bg-base-200 rounded-box w-52">
+          <li><a href="/index.html">Events</a></li>
+          <li><a href="https://scouting.gateway-gamers.net">Scouting</a></li>
+        </ul>
+      </div>
+    </div>
+  </div>
+
+</header>