fix-vercel-build

Retrieve Vercel build logs, analyze failures, and fix deployment issues. MUST use Vercel MCP tools.

1. Get build logs: Use current branch (unless explicitly told otherwise), use Vercel MCP tools to retrieve build logs
2. Analyze errors: Parse logs for TypeScript/ESLint errors, missing dependencies, env vars, imports, config issues
3. Fix issues: Read affected files, apply fixes per project rules, resolve types/imports/lint errors, add missing deps, fix env/config, commit changes