feat: team org panel, admin CRUD, local deploy tools, bidirectional data sync

Add TeamMember model and APIs, team status UI, /admin page, local server bats,
and scripts to sync data between local PostgreSQL and Render.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/get-lan-ip.ps1

@@ -0,0 +1,4 @@
+$ip = Get-NetIPAddress -AddressFamily IPv4 -ErrorAction SilentlyContinue |
+  Where-Object { $_.IPAddress -match '^(172\.|192\.168\.|10\.)' } |
+  Select-Object -First 1 -ExpandProperty IPAddress
+if ($ip) { Write-Output $ip }