feat: dev updates, Next.js 15 migration and fixes

Next.js 15 Migration:
- Upgraded from Next.js 14 to Next.js 15
- Upgraded to React 19
- Fixed async params in all dynamic route pages
- Fixed async params in all dynamic API routes
- Fixed JSX.Element -> React.ReactNode in Footer.tsx
- Updated next-env.d.ts for Next.js 15 types

Home page sections:
- Built TeamSection component (founders preview, limit 3)
- Extracted AboutTeaser as standalone component
- Updated home page section order (6 sections)
- Added dev empty states to all sections
- Removed Meet the Team link from AboutTeaser

Admin fixes:
- Fixed admin sidebar showing on login page
- Moved login to (auth) route group
- Moved protected pages to (protected) route group

Other:
- Favicon updated to use logo.png (icon, apple, shortcut)
- scripts/seed-admin.ts added to gitignore
- Neon GitHub Actions workflow added
- Next.js 15 and async params documented in AGENTS.md

Author: onerandomdevv

.gitignore

@@ -20,3 +20,6 @@ CLAUDE.md
 GEMINI.md
 .cursorrules
 PROMPTS.md
+
+# Seed scripts — local utility only, not for production
+scripts/seed-admin.ts

AGENTS.md

@@ -1,5 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
+/// <reference path="./.next/types/routes.d.ts" />
 
 // NOTE: This file should not be edited
-// see https://nextjs.org/docs/app/building-your-application/configuring/typescript for more information.
+// see https://nextjs.org/docs/app/api-reference/config/typescript for more information.

next-env.d.ts

@@ -21,10 +21,10 @@
     "cloudinary": "^2.10.0",
     "clsx": "^2.1.1",
     "drizzle-orm": "^0.45.2",
-    "next": "14.2.35",
+    "next": "^15.5.15",
     "next-auth": "5.0.0-beta.31",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.5",
+    "react-dom": "19.2.5",
     "react-email": "^6.0.5",
     "react-image-crop": "^11.0.10",
     "resend": "^6.12.2",
@@ -37,11 +37,11 @@
     "@tailwindcss/postcss": "^4",
     "@types/bcryptjs": "^3.0.0",
     "@types/node": "^20",
-    "@types/react": "^18",
-    "@types/react-dom": "^18",
+    "@types/react": "^19.2.14",
+    "@types/react-dom": "^19.2.3",
     "drizzle-kit": "^0.31.10",
     "eslint": "^9",
-    "eslint-config-next": "14.2.35",
+    "eslint-config-next": "15.5.15",
     "tailwindcss": "^4",
     "typescript": "^5"
   }