chore: SQLite verwijderd — alleen PostgreSQL via Neon

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -17,13 +17,9 @@
     "@dnd-kit/core": "^6.3.1",
     "@dnd-kit/sortable": "^8.0.0",
     "@dnd-kit/utilities": "^3.2.2",
-    "@libsql/client": "^0.17.2",
-    "@prisma/adapter-better-sqlite3": "^7.8.0",
-    "@prisma/adapter-libsql": "^7.8.0",
     "@prisma/adapter-pg": "^7.8.0",
     "@prisma/client": "^7.8.0",
     "bcryptjs": "^2.4.3",
-    "better-sqlite3": "^12.9.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "dotenv": "^17.4.2",
@@ -51,7 +47,6 @@
   "devDependencies": {
     "@tailwindcss/postcss": "^4",
     "@types/bcryptjs": "^2.4.6",
-    "@types/better-sqlite3": "^7.6.13",
     "@types/node": "^20",
     "@types/pg": "^8.20.0",
     "@types/react": "^19",