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>

package.json

@@ -13,10 +13,11 @@
     "watch-css": "sass src/scss/main.scss public/style.css --watch --style=expanded --source-map",
     "dev-with-css": "concurrently \"npm run watch-css\" \"npm run dev\"",
     "dev-with-css:ts": "concurrently \"npm run watch-css\" \"npm run dev:ts\"",
-    "build": "npm run build:ts && npm run build-css && npm run build:frontend && npm run copy-i18n",
+    "build": "npm run generate-version && npm run build:ts && npm run build-css && npm run build:frontend && npm run copy-i18n",
     "build:ts": "tsc",
     "copy-i18n": "mkdir -p dist/i18n/locales && cp -r src/i18n/locales/* dist/i18n/locales/",
-    "test": "jest --runInBand --forceExit",
+    "generate-version": "node scripts/generate-version.js",
+    "test": "jest --runInBand --forceExit --detectOpenHandles",
     "test:coverage": "jest --coverage",
     "lint": "eslint src/ tests/",
     "lint:fix": "eslint src/ tests/ --fix",