fix: proxyctl logs no longer hangs

logs command was using journalctl -f (follow) which blocks forever.
Split into three commands:
- logs [N]: show last N lines and exit (default 30)
- logs-follow [N]: tail + follow (old behavior)
- logs-all: full dump

scripts/proxyctl

@@ -24,8 +24,9 @@ usage() {
     echo -e "  ${CYAN}restart${NC}      Rebuild + restart"
     echo -e "  ${CYAN}rebuild${NC}      Build release binary only"
     echo -e "  ${CYAN}status${NC}       Service status + quota + usage"
-    echo -e "  ${CYAN}logs${NC} [N]     Tail last N lines (default 30) + follow"
-    echo -e "  ${CYAN}logs-all${NC}     Full log dump (no follow)"
+    echo -e "  ${CYAN}logs${NC} [N]     Show last N lines (default 30)"
+    echo -e "  ${CYAN}logs-follow${NC} [N] Tail last N lines + follow"
+    echo -e "  ${CYAN}logs-all${NC}     Full log dump"
     echo -e "  ${CYAN}test${NC} [msg]   Quick test request (gemini-3-flash)"
     echo -e "  ${CYAN}health${NC}       Health check"
     echo ""
@@ -91,6 +92,11 @@ do_status() {
 }
 
 do_logs() {
+    local lines="${1:-30}"
+    journalctl --user -u "$SERVICE" --no-pager -n "$lines"
+}
+
+do_logs_follow() {
     local lines="${1:-30}"
     journalctl --user -u "$SERVICE" --no-pager -n "$lines" -f
 }
@@ -124,6 +130,7 @@ case "${1:-}" in
     rebuild)  do_build ;;
     status)   do_status ;;
     logs)        do_logs "${2:-30}" ;;
+    logs-follow) do_logs_follow "${2:-30}" ;;
     logs-all)    do_logs_all ;;
     test)     do_test "${2:-}" ;;
     health)   do_health ;;