Integrate Alpine.js for reactive UI

- Add Alpine.js (self-hosted, embedded in static/)
- Refactor app.js to use Alpine.js stores and components
- Update templates to use x-data, x-bind, x-show, x-text directives
- Add reactive deploy button state, live logs, status badges
- Add auto-dismiss alerts with close button and transitions
- Add copy-to-clipboard component with feedback
- Add confirm dialog component for destructive actions
- Add relative time component with auto-update
- Add prettier to make fmt target for JS formatting

Makefile

@@ -16,6 +16,7 @@ lint:
 fmt:
 	gofmt -s -w .
 	goimports -w .
+	npx prettier --write --tab-width 4 static/js/*.js
 
 test:
 	go test -v -race -cover ./...