feat: add user authentication UI to header component

Add login and register dialogs, user dropdown menu with profile link and logout option, and integrate with session management hook. Prevent hydration mismatches by conditionally rendering auth elements after mount. Update package-lock.json with new @esbuild dependencies for build tooling.

lib/db/migrations/003_fix_servers_location.sql

@@ -0,0 +1,10 @@
+-- Migration 003: Corrigir constraint de location para incluir BR
+-- Criado em: 2025-01-27
+
+-- Remover constraint antigo
+ALTER TABLE servers DROP CONSTRAINT IF EXISTS servers_location_check;
+
+-- Adicionar novo constraint que inclui BR
+ALTER TABLE servers ADD CONSTRAINT servers_location_check 
+  CHECK (location IN ('NA', 'SA', 'EU', 'OC', 'BR'));
+