Integrate employee directory with backend

[Davidzongming]

No description provided.

[Davidzongming]

I run the command in readme but it still didn't pass the test, and I asked codex for this fix for this, but it says I need to change "lint": "next lint" to "lint": "eslint src prisma" in package.json. And I figured that it might be better to ask than change it.

[Thomasbenissan]

Great work on this, David! The directory PATCH endpoint and profile editing flow are solid.

A few fixes were pushed:

• Reverted .env.sample back to placeholder values instead of hardcoded local credentials
• Fixed tsconfig.json jsx back to "preserve" (required by Next.js 14)
• Reverted async searchParams and cookies() patterns back to Next.js 14 sync style (project is on v14, not v15), which fixes the ESLint failures
• Moved the duplicated DirectoryApiEmployee interface into types.ts so both EmployeeDirectory and ProfileTile import from one place
• Fixed duplicate bucket inserts in seed.sql that would cause a primary key error when seeding
• Restricted position field edits to admins only, since it's an auth-tier value

All CI checks (ESLint + Prettier) now pass. Nice work getting the profile persistence wired up end-to-end!