fix: update build command and output directory for Vercel deployment

Author: tikazyq

docs/guides/VERCEL_DEPLOYMENT.md

@@ -23,9 +23,9 @@ Vercel should automatically detect the `vercel.json` configuration, but verify:
 
 - **Framework**: Next.js
 - **Root Directory**: `/` (repository root)
-- **Build Command**: `pnpm build:core && pnpm build:web`
+- **Build Command**: `pnpm run build:vercel`
 - **Install Command**: `pnpm install --frozen-lockfile`
-- **Output Directory**: `packages/web/.next`
+- **Output Directory**: `packages/web/.next-build`
 
 ### Step 3: Add PostgreSQL Database
 

vercel.json

@@ -1,9 +1,9 @@
 {
   "framework": "nextjs",
-  "buildCommand": "cd ../.. && pnpm run build:vercel",
-  "installCommand": "cd ../.. && pnpm install --frozen-lockfile",
-  "outputDirectory": ".next-build",
+  "buildCommand": "pnpm run build:vercel",
+  "installCommand": "pnpm install --frozen-lockfile",
+  "outputDirectory": "packages/web/.next-build",
   "env": {
     "NODE_ENV": "production"
   }
-}
+}