fix(installer): fix ClickHouse health check and normalize hostname

- ClickHouse health check: use $CLICKHOUSE_PASSWORD directly instead
  of extracting from .env via grep (nested quoting broke in eval)
- Normalize auto-detected hostname to lowercase (Windows returns
  uppercase which causes OIDC issuer case mismatches)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

installer/install.sh

@@ -353,6 +353,8 @@ check_port_available() {
 auto_detect() {
   if [ -z "$PUBLIC_HOST" ]; then
     PUBLIC_HOST=$(hostname -f 2>/dev/null || hostname 2>/dev/null || echo "localhost")
+    # Normalize to lowercase (Windows hostnames are uppercase)
+    PUBLIC_HOST=$(echo "$PUBLIC_HOST" | tr '[:upper:]' '[:lower:]')
     local primary_ip
     primary_ip=$(ip route get 1.1.1.1 2>/dev/null | awk '{print $7; exit}' || true)
     if [ -n "$primary_ip" ]; then
@@ -929,7 +931,7 @@ verify_health() {
     120 || failed=1
 
   [ $failed -eq 0 ] && check_service_health "ClickHouse" \
-    "cd '$INSTALL_DIR' && docker compose -p '$COMPOSE_PROJECT' exec -T clickhouse clickhouse-client --password \"\$(grep CLICKHOUSE_PASSWORD '$INSTALL_DIR/.env' | cut -d= -f2)\" --query 'SELECT 1'" \
+    "cd '$INSTALL_DIR' && docker compose -p '$COMPOSE_PROJECT' exec -T clickhouse clickhouse-client --password '$CLICKHOUSE_PASSWORD' --query 'SELECT 1'" \
     120 || failed=1
 
   [ $failed -eq 0 ] && check_service_health "Logto" \