Wiki badge and /wiki links in global search results (#14)

Theme half of the cross-repo wiki global search work (plugin half: sow-nodebb-plugin-wiki#12).

Search results tagged by the wiki plugin (`isWikiArticle` + `wikiPath`) now render with a gold "Wiki" badge and link to `/wiki/...` instead of `/post/...`:

- `templates/partials/quick-search-results.tpl` — navbar quick-search dropdown
- `templates/partials/search-results.tpl` — `/search` page, topics view
- `templates/partials/posts_list_item.tpl` — `/search` page, posts view (default). Shared with account/group post lists, where the wiki flags are never set and the conditional no-ops.
- `scss/westgate/_search.scss` — badge styling from existing `--wg-gold` / ledger-border tokens; imported from `theme.scss`
- `languages/en-GB/westgate.json` — `[[westgate:wiki-badge]]` label
- Spec updated with the resolved approach (template override, not client-side decoration)

Untagged forum results render byte-identical to Harmony stock.

Verification: all three overrides compiled and rendered against benchpressjs with mixed wiki/forum fixture rows (wiki row gets `/wiki/...` href + exactly one badge; forum rows keep stock `/post/...` links, `RE:` prefix and main-post icon preserved). New contract test in `tests/wiki-search-badge-contract.test.js`; suite passes except the pre-existing `global-footer-contract.test.js` failure (stale `join-the-team` link assertion from #10, also failing on main — not touched here).

End-to-end visual check (badge in the live dropdown + /search) still needs the dev stack with plugin PR #12 merged.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Reviewed-on: #14
Co-authored-by: vickydotbat <vickydotbat@tutamail.com>
Co-committed-by: vickydotbat <vickydotbat@tutamail.com>

templates/partials/search-results.tpl

@@ -0,0 +1,55 @@
+{{{ if matchCount }}}
+<div class="card card-header text-xs px-2 py-1 fw-semibold border-0 align-self-start">[[search:results-matching, {matchCount}, {search_query}, {time}]] </div>
+{{{ else }}}
+{{{ if search_query }}}
+<div class="badge text-bg-warning align-self-start">[[search:no-matches]]</div>
+{{{ end }}}
+{{{ end }}}
+
+<div id="results" class="search-results" data-search-query="{search_query}">
+	{{{ if showAsPosts }}}
+	{{{ if posts.length }}}
+	<!-- IMPORT partials/posts_list.tpl -->
+	{{{ end }}}
+	{{{ end }}}
+
+	{{{ if showAsTopics }}}
+	{{{ each posts }}}
+	<hr/>
+	<div class="topic-row  mb-3">
+		<a class="topic-title fw-semibold fs-5 text-reset text-break" href="{{{ if ./isWikiArticle }}}{config.relative_path}{./wikiPath}{{{ else }}}{config.relative_path}/post/{encodeURIComponent(./pid)}{{{ end }}}">
+			{{{ if ./isWikiArticle }}}<span class="badge westgate-wiki-badge"><i class="fa fa-book-open"></i> [[westgate:wiki-badge]]</span> {{{ end }}}{{{ if !./isMainPost }}}RE: {{{ end }}}{./topic.title}
+		</a>
+		<div class="post-body d-flex flex-column gap-1">
+			<div class="d-flex gap-3 post-info">
+				<div class="post-author d-flex gap-1">
+					<a class="lh-1 text-decoration-none" href="{config.relative_path}/user/{./user.userslug}">{buildAvatar(./user, "16px", true, "not-responsive")}</a>
+					<a class="fw-semibold text-sm" href="{config.relative_path}/user/{./user.userslug}">{../user.displayname}</a>
+				</div>
+				<span class="timeago text-sm text-muted" title="{./timestampISO}"></span>
+			</div>
+		</div>
+	</div>
+	{{{ end }}}
+	{{{ end }}}
+
+	{{{ if users.length }}}
+	<!-- IMPORT partials/users_list.tpl -->
+	{{{ end }}}
+
+	{{{ if tags.length }}}
+	<div class="tag-list row row-cols-2 row-cols-lg-3 row-cols-xl-4 gx-3 gy-2">
+	<!-- IMPORT partials/tags_list.tpl -->
+	</div>
+	{{{ end }}}
+
+	{{{ if categories.length }}}
+	<ul class="categories list-unstyled">
+		{{{each categories}}}
+		<!-- IMPORT partials/categories/item.tpl -->
+		{{{end}}}
+	</ul>
+	{{{ end }}}
+
+	<!-- IMPORT partials/paginator.tpl -->
+</div>