Add version footer and disable map scroll wheel zoom

- Add build-time version generation script that captures git commit info
- Create /api/version endpoint to serve version data
- Add version footer component showing commit SHA, date, and branch
- Link version SHA to commit on git.deco.sh for easy navigation
- Fix footer text duplication issue with i18n translations
- Disable mouse wheel zoom on map, require +/- buttons for better UX
- Update service worker cache to v4 with new version-footer.js

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

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

public/app-mapbox.js

@@ -1,5 +1,7 @@
 document.addEventListener('DOMContentLoaded', async () => {
-    const map = L.map('map').setView([42.9634, -85.6681], 10);
+    const map = L.map('map', {
+        scrollWheelZoom: false
+    }).setView([42.9634, -85.6681], 10);
 
     L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
         maxZoom: 18,