Format with prettier. Use screen mode for invitation import - dialog mode is broken.

package.json

@@ -9,7 +9,9 @@
     "start": "SYNC_SERVER_URL=https://sync.xo.harvmaster.com node dist/index.js",
     "test": "echo \"Error: no test specified\" && exit 1",
     "nuke": "tsx scripts/rm-dbs.ts",
-    "nuke:dry": "tsx scripts/rm-dbs.ts --dry"
+    "nuke:dry": "tsx scripts/rm-dbs.ts --dry",
+    "format": "prettier --write \"**/*.{js,ts,md,json}\" --ignore-path .gitignore",
+    "format:check": "prettier --check ."
   },
   "keywords": [
     "crypto",
@@ -30,6 +32,7 @@
     "better-sqlite3": "^12.6.2",
     "clipboardy": "^5.1.0",
     "ink": "^6.6.0",
+    "prettier": "^3.8.1",
     "qrcode": "^1.5.4",
     "react": "^19.2.4",
     "zod": "^4.3.6"