refactor: migrate from better-sqlite3 to Prisma (#170)

* refactor: migrate from better-sqlite3 to Prisma

- Install Prisma dependencies and initialize with SQLite
- Create Prisma schema matching existing database structure
- Replace database.js with Prisma-based database service
- Update all API routes, tRPC routers, and WebSocket handler
- Convert TypeScript types to match Prisma schema
- Update build process to include Prisma migrations
- Remove better-sqlite3 dependency

All database operations now use Prisma while maintaining SQLite backend.

* fix: flatten server data in installed scripts API responses

- Transform Prisma nested server objects to flattened fields expected by frontend
- Update getAllInstalledScripts, getInstalledScriptsByServer, and getInstalledScriptById
- Server names should now display correctly in the installed scripts table
- Use nullish coalescing operators for better null handling

* fix: ensure DATABASE_URL is set in .env for Prisma during updates

- Add ensure_database_url() function to update.sh
- Function checks if .env exists and creates from .env.example if needed
- Automatically adds DATABASE_URL if not present
- Call function after restore_backup_files() in update flow
- Fixes Prisma client generation error during updates

package.json

@@ -22,6 +22,7 @@
     "typecheck": "tsc --noEmit"
   },
   "dependencies": {
+    "@prisma/client": "^6.17.1",
     "@radix-ui/react-dropdown-menu": "^2.1.16",
     "@radix-ui/react-slot": "^1.2.3",
     "@t3-oss/env-nextjs": "^0.13.8",
@@ -36,7 +37,6 @@
     "@xterm/addon-web-links": "^0.11.0",
     "@xterm/xterm": "^5.5.0",
     "bcryptjs": "^3.0.2",
-    "better-sqlite3": "^12.4.1",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "jsonwebtoken": "^9.0.2",
@@ -77,6 +77,7 @@
     "postcss": "^8.5.3",
     "prettier": "^3.5.3",
     "prettier-plugin-tailwindcss": "^0.7.0",
+    "prisma": "^6.17.1",
     "tailwindcss": "^4.1.14",
     "typescript": "^5.8.2",
     "typescript-eslint": "^8.46.1",