Add Westgate global footer (#8)

## Summary
- add the global Westgate footer partial under `templates/partials/footer/`
- import scoped footer styles from `theme.scss`
- include the footer design spec and powered-by HTML/CSS references
- add a contract test for the footer integration and required links

## Verification
- `node tests/global-footer-contract.test.js`
- `node tests/global-topbar-contract.test.js`
- `for test in tests/*.test.js; do node "$test"; done`
- `npm test --if-present`
- `git diff --check`

Reviewed-on: #8
Co-authored-by: vickydotbat <vickydotbat@tutamail.com>
Co-committed-by: vickydotbat <vickydotbat@tutamail.com>

templates/partials/footer/westgate-global.tpl

@@ -0,0 +1,63 @@
+<footer class="wg-footer" aria-label="Shadows Over Westgate footer">
+	<div class="wg-footer__inner">
+		<section class="wg-footer__brand" aria-labelledby="wg-footer-title">
+			<div class="wg-footer__brand-row">
+				<span class="wg-footer__mark" aria-hidden="true"><span></span></span>
+				<h2 class="wg-footer__title" id="wg-footer-title">{config.siteTitle}</h2>
+			</div>
+			<p class="wg-footer__description">
+				A Neverwinter Nights: Enhanced Edition persistent world of gothic intrigue, set in the Forgotten Realms port city of Westgate.
+			</p>
+			<p class="wg-footer__motto">Mind the shadows.</p>
+		</section>
+
+		<nav class="wg-footer__nav" aria-label="Explore">
+			<h2 class="wg-footer__heading">Explore</h2>
+			<ul class="wg-footer__links">
+				<li><a href="{relative_path}/">Home</a></li>
+				<li><a href="{relative_path}/category/1/news">News</a></li>
+				<li><a href="{relative_path}/gallery">Gallery</a></li>
+				<li><a href="{relative_path}/category/84/developer-blog">Dev Blog</a></li>
+				<li><a href="{relative_path}/join-the-team">Join the Team</a></li>
+			</ul>
+		</nav>
+
+		<nav class="wg-footer__nav" aria-label="Community">
+			<h2 class="wg-footer__heading">Community</h2>
+			<ul class="wg-footer__links">
+				<li><a href="{relative_path}/categories">Forums</a></li>
+				<li><a href="{relative_path}/wiki">Wiki</a></li>
+				<li><a href="{relative_path}/register">Register</a></li>
+				<li><a href="{relative_path}/wiki">How to Join</a></li>
+			</ul>
+		</nav>
+	</div>
+
+	<div class="wg-footer__meta">
+		<p>&copy; 2026 Shadows Over Westgate &middot; A NWN:EE Persistent World</p>
+		<p>Forgotten Realms &middot; Westgate &middot; Sea of Fallen Stars</p>
+	</div>
+
+	<div class="wg-footer__powered-by" aria-label="Platform credits">
+		<a
+			class="wg-footer__powered-pill"
+			href="https://nodebb.org"
+			target="_blank"
+			rel="noopener noreferrer"
+			aria-label="Powered by NodeBB"
+		>
+			<span class="wg-footer__powered-label">Powered by</span>
+			<span class="wg-footer__powered-name">NodeBB</span>
+		</a>
+		<a
+			class="wg-footer__powered-pill"
+			href="https://tiptap.dev"
+			target="_blank"
+			rel="noopener noreferrer"
+			aria-label="Powered by Tiptap"
+		>
+			<span class="wg-footer__powered-label">Powered by</span>
+			<span class="wg-footer__powered-name">Tiptap</span>
+		</a>
+	</div>
+</footer>