Update Next.js/React Flight packages for RCE advisory (#29)

# React Flight / Next.js RCE Advisory Fix

## Summary
Updated the repository to address the React Flight / Next.js RCE advisory by upgrading Next.js to a patched version.

## Analysis
Scanned all workspace package.json files to identify affected packages:
- **apps/website/package.json**: Contains `next@16.0.3` (VULNERABLE)
- **apps/app/package.json**: Does not use Next.js or React Flight packages
- **packages/agent-cli-sdk/package.json**: No Next.js or React Flight packages
- **packages/agentcmd-workflows/package.json**: No Next.js or React Flight packages

No React Flight packages (`react-server-dom-webpack`, `react-server-dom-parcel`, `react-server-dom-turbopack`) were found in the project.

## Changes Made

### Modified Files
- **apps/website/package.json**: Upgraded `next` from `16.0.3` to `16.0.7`
  - React and React DOM were not modified as they are already at safe versions (19.2.0)
  - Next.js version 16.0.7 includes the security fix for the RCE vulnerability

### Updated Lockfiles
- **pnpm-lock.yaml**: Updated to reflect the new Next.js 16.0.7 dependency and all transitive dependencies

## Verification
✅ Successfully ran `pnpm install` to update lockfiles
✅ Verified that `next@16.0.7` is correctly resolved in pnpm-lock.yaml
✅ Successfully built the website app with `pnpm build` to confirm no regressions

## Implementation Details
- Only the affected package (Next.js in the website app) was upgraded to the patched version
- No changes were made to React or React DOM as per the advisory instructions (Next.js handles these automatically)
- All peer dependency warnings are pre-existing and unrelated to this fix
- The build completed successfully with no errors

## Security Impact
The upgrade from Next.js 16.0.3 to 16.0.7 addresses the React Flight / Next.js RCE advisory by including security patches that prevent remote code execution attacks through the React Flight protocol.

Co-authored-by: Vercel <vercel[bot]@users.noreply.github.com>

Author: vercel[bot]

apps/website/package.json

@@ -31,7 +31,7 @@
     "lucide-react": "^0.544.0",
     "mermaid": "^11.12.1",
     "motion": "^12.23.24",
-    "next": "16.0.3",
+    "next": "16.0.7",
     "next-themes": "^0.4.6",
     "react": "19.2.0",
     "react-dom": "19.2.0",
@@ -48,7 +48,7 @@
     "@types/react": "^19",
     "@types/react-dom": "^19",
     "eslint": "^9",
-    "eslint-config-next": "16.0.3",
+    "eslint-config-next": "16.0.7",
     "tailwindcss": "^4",
     "typescript": "^5"
   }