fix(cf-modal): portal to body + auto-close on parcel switch

Two related issues with the modal when the user kept clicking
around the map while in CF order mode:

1. LAYOUT BREAK (Marius screenshot — modal header clipped above
   viewport): The V2 panel wrapper uses `backdrop-blur-md`. Per CSS
   spec, an element with non-none backdrop-filter establishes a
   containing block for `fixed`-positioned descendants. So
   `fixed inset-0` on the modal was relative to the panel
   (top-right, ~50px tall at min) instead of the viewport — the
   modal anchored to the panel and overflowed up. Fix: render via
   React's createPortal to document.body. The modal now escapes the
   panel's stacking context entirely and centers in the viewport.

   Also bumped z-index from 50 to 100 so the modal stays above the
   MapLibre canvas + panel itself.

2. STATE CARRY-OVER: clicking a different parcel while the modal
   was open silently re-targeted the modal at the new parcel — same
   modal showing different cadref/sold mid-flow could mislead the
   user about which parcel they were buying CF for. Fix:
   FeatureInfoPanel now has a useEffect that closes the modal when
   feature.cadastralRef / siruta / layerId changes. Modal stays
   scoped to a single decision.

SSR guard: if (typeof document === "undefined") return null; before
the portal call so the modal doesn't blow up during server-side
render.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/modules/geoportal/v2/cf-order-modal.tsx

@@ -17,6 +17,7 @@
 //   error            → any failure with retry option
 
 import { useCallback, useEffect, useRef, useState } from "react";
+import { createPortal } from "react-dom";
 import {
   X, Loader2, Check, AlertCircle, FileText, Coins,
   Plug, ArrowRight, Download,
@@ -276,12 +277,18 @@ export function CfOrderModal({
   );
 
   if (!open) return null;
+  // Render via portal so the modal escapes the panel's containing
+  // block — the parent V2 panel uses backdrop-blur-md which (per CSS
+  // spec) creates a containing block for `fixed` descendants. Without
+  // the portal the modal anchors to the panel's top-right corner and
+  // gets clipped above the viewport.
+  if (typeof document === "undefined") return null;
 
-  return (
+  return createPortal(
     <div
       role="dialog"
       aria-modal="true"
-      className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 px-4 backdrop-blur-sm animate-in fade-in duration-200"
+      className="fixed inset-0 z-[100] flex items-center justify-center bg-black/60 px-4 backdrop-blur-sm animate-in fade-in duration-200"
       onClick={(e) => {
         // dismiss on backdrop click only when not mid-flight
         if (
@@ -602,7 +609,8 @@ export function CfOrderModal({
           )}
         </div>
       </div>
-    </div>
+    </div>,
+    document.body,
   );
 }
 

src/modules/geoportal/v2/feature-info-panel.tsx

@@ -406,6 +406,13 @@ export function FeatureInfoPanel({ feature, onClose, onSelectFeature, basic = fa
   const [condoLoading, setCondoLoading] = useState(false);
   const [cfModalOpen, setCfModalOpen] = useState(false);
 
+  // Close the CF modal whenever the user switches to a different
+  // parcel — keeps the modal scoped to a single decision instead of
+  // silently re-targeting mid-flight.
+  useEffect(() => {
+    setCfModalOpen(false);
+  }, [feature.cadastralRef, feature.siruta, feature.layerId]);
+
   const authRetriedRef = useRef<boolean>(
     typeof window !== "undefined" &&
       sessionStorage.getItem(AUTH_RETRY_KEY) === "1",