feat: Show Statbus version in footer with link to GitHub commit

Short hash displayed, full SHA used for the GitHub commit link.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jhf

app/next.config.js

@@ -41,6 +41,16 @@ if (!process.env.DEBUG_STATUS_REPORTED) {
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   reactStrictMode: true,
+  env: {
+    NEXT_PUBLIC_STATBUS_VERSION: process.env.VERSION || 'dev',
+    NEXT_PUBLIC_STATBUS_VERSION_SHA: (() => {
+      try {
+        return require('child_process').execSync('git rev-parse HEAD').toString().trim();
+      } catch {
+        return '';
+      }
+    })(),
+  },
   // output: 'standalone' is primarily for production builds.
   // Set it conditionally to avoid potential interference with dev server features like proxying.
   ...(isDevelopment && {

app/src/components/footer.tsx

@@ -49,6 +49,15 @@ export default function Footer() {
             <Link href="https://www.statbus.org" aria-label="Statbus homepage">
               <Globe size={22} className="stroke-ssb-neon" />
             </Link>
+            <span className="text-xs text-gray-300">
+              Statbus version{" "}
+              <Link
+                href={`https://github.com/statisticsnorway/statbus/commit/${process.env.NEXT_PUBLIC_STATBUS_VERSION_SHA}`}
+                className="hover:text-ssb-neon underline"
+              >
+                {process.env.NEXT_PUBLIC_STATBUS_VERSION}
+              </Link>
+            </span>
           </div>
           {/* Only render CommandPaletteTriggerButton if mounted, not loading, and authenticated */}
           {showAuthenticatedLayout && (