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/sw.js

@@ -1,5 +1,5 @@
 // Service Worker for Great Lakes Ice Report PWA
-const CACHE_NAME = 'ice-report-v2';
+const CACHE_NAME = 'ice-report-v4';
 const OFFLINE_URL = '/offline.html';
 
 // Files to cache for offline functionality
@@ -12,6 +12,7 @@ const CACHE_FILES = [
   '/app.js',
   '/admin.js',
   '/utils.js',
+  '/version-footer.js',
   '/manifest.json',
   OFFLINE_URL
 ];