feat(panel): add three-sided web console (User, Admin, SysAdmin)

Vite + TypeScript + Tailwind single-page console presenting the three operator tiers and consuming the external felis-api face. Build output and design notes are not tracked.

panel/public/config.json

@@ -0,0 +1,4 @@
+{
+  "apiBase": "/api/v1",
+  "rootDomain": "example.net"
+}