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>

tests/global-footer-contract.test.js

@@ -0,0 +1,65 @@
+'use strict';
+
+const assert = require('assert');
+const fs = require('fs');
+const path = require('path');
+
+function read(relativePath) {
+	const filePath = path.join(__dirname, '..', relativePath);
+	assert(fs.existsSync(filePath), `${relativePath} should exist`);
+	return fs.readFileSync(filePath, 'utf8');
+}
+
+function assertIncludes(haystack, needle, message) {
+	assert(
+		haystack.includes(needle),
+		message || `Expected file to include ${needle}`
+	);
+}
+
+function assertExcludes(haystack, needle, message) {
+	assert(
+		!haystack.includes(needle),
+		message || `Expected file not to include ${needle}`
+	);
+}
+
+const footer = read('templates/footer.tpl');
+const theme = read('theme.scss');
+const partial = read('templates/partials/footer/westgate-global.tpl');
+
+assertIncludes(
+	footer,
+	'<!-- IMPORT partials/footer/westgate-global.tpl -->',
+	'Footer layout should mount the Westgate global footer partial'
+);
+assertExcludes(
+	footer,
+	'<!-- IMPORT partials/sidebar-right.tpl -->',
+	"Footer should not reintroduce Harmony's right global sidebar"
+);
+assertIncludes(
+	theme,
+	'@import "./scss/westgate/footer";',
+	'theme.scss should import the focused footer partial'
+);
+assertIncludes(partial, '<footer class="wg-footer"', 'Footer partial should use semantic footer markup');
+assertIncludes(partial, 'href="https://nodebb.org"', 'Footer should credit NodeBB');
+assertIncludes(partial, 'href="https://tiptap.dev"', 'Footer should credit Tiptap');
+assertIncludes(partial, 'aria-label="Powered by NodeBB"', 'NodeBB credit should have an accessible name');
+assertIncludes(partial, 'aria-label="Powered by Tiptap"', 'Tiptap credit should have an accessible name');
+
+[
+	'{relative_path}/category/1/news',
+	'{relative_path}/gallery',
+	'{relative_path}/category/84/developer-blog',
+	'{relative_path}/join-the-team',
+	'{relative_path}/categories',
+	'{relative_path}/wiki',
+	'{relative_path}/register',
+].forEach((href) => {
+	assertIncludes(partial, `href="${href}"`, `Footer should include internal link ${href}`);
+});
+
+assertExcludes(partial, 'onClick="{{', 'Footer should use real anchors, not Claude Design preview handlers');
+assertExcludes(partial, 'https://westgate.pw', 'Footer should use relative internal links');