feat: add Excel export, keyboard shortcuts, and print view for CFDIs

- Add export to Excel button with xlsx library for filtered data
- Add keyboard shortcuts (Esc to close popovers/forms)
- Add print button to invoice viewer modal with optimized print styles

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/package.json

@@ -27,6 +27,7 @@
     "class-variance-authority": "^0.7.0",
     "clsx": "^2.1.0",
     "date-fns": "^3.6.0",
+    "file-saver": "^2.0.5",
     "html2pdf.js": "^0.14.0",
     "lucide-react": "^0.460.0",
     "next": "^14.2.0",
@@ -35,10 +36,12 @@
     "react-hook-form": "^7.53.0",
     "recharts": "^2.12.0",
     "tailwind-merge": "^2.5.0",
+    "xlsx": "^0.18.5",
     "zod": "^3.23.0",
     "zustand": "^5.0.0"
   },
   "devDependencies": {
+    "@types/file-saver": "^2.0.7",
     "@types/node": "^22.0.0",
     "@types/react": "^18.3.0",
     "@types/react-dom": "^18.3.0",