refactor: migrate API from Apollo Server to Mercurius and enhance GraphQL implementation

- Replaced Apollo Server with Mercurius for GraphQL API
- Updated resolvers to use Mercurius-compatible GraphQL implementation
- Migrated from Express to Fastify for server framework
- Improved error handling with GraphQL error extensions
- Added Zod for environment variable validation
- Updated Prisma schema and migrations
- Configured CORS and WebSocket subscriptions
- Simplified GraphQL schema and resolver structure
- Enhanced type safety and code organization

packages/ui/eslint.config.mjs

@@ -1,4 +1,4 @@
-import { config } from "@repo/eslint-config/react-internal";
+import { config } from '@repo/eslint-config/solid-js';
 
 /** @type {import("eslint").Linter.Config} */
 export default config;

packages/ui/package.json

@@ -14,14 +14,9 @@
     "@repo/eslint-config": "*",
     "@repo/typescript-config": "*",
     "@turbo/gen": "^2.4.4",
-    "@types/node": "^22.13.9",
-    "@types/react": "19.0.10",
-    "@types/react-dom": "19.0.4",
-    "eslint": "^9.21.0",
-    "typescript": "5.8.2"
+    "eslint": "^9.21.0"
   },
   "dependencies": {
-    "react": "^19.0.0",
-    "react-dom": "^19.0.0"
+    "solid-js": "^1.9.5"
   }
 }

packages/ui/tsconfig.json

@@ -1,5 +1,5 @@
 {
-  "extends": "@repo/typescript-config/react-library.json",
+  "extends": "@repo/typescript-config/solid.json",
   "compilerOptions": {
     "outDir": "dist"
   },