fix(builder): deterministic ids for NumberCounter + form-relay marker

Two components of the det-id bug class were missed in the earlier migration:
NumberCounter's wrapper/counter ids and count-up script, and the shared
form-relay-wiring fid (used by ContactForm/FormContainer). Both used
Math.random() for exported HTML ids, breaking caching/diffing across exports.

Migrate both to scopeId(nodeId, fallbackSeed, prefix), threading nodeId
through NumberCounter.toHtml and relayFormWiring (via ContactForm.toHtml and
FormContainer.toHtml, both now passing nodeId as their 3rd arg).

craft/src/components/sections/NumberCounter.tsx

@@ -1,7 +1,7 @@
 import React, { CSSProperties } from 'react';
 import { useNode, UserComponent } from '@craftjs/core';
 import { cssPropsToString } from '../../utils/style-helpers';
-import { escapeHtml, escapeAttr } from '../../utils/escape';
+import { escapeHtml, escapeAttr, scopeId } from '../../utils/escape';
 
 interface Counter {
   number: number;
@@ -109,7 +109,7 @@ NumberCounter.craft = {
 
 /* ---------- HTML export ---------- */
 
-(NumberCounter as any).toHtml = (props: NumberCounterProps, _childrenHtml: string) => {
+(NumberCounter as any).toHtml = (props: NumberCounterProps, _childrenHtml: string, nodeId?: string) => {
   const {
     counters = defaultCounters,
     columns = 4,
@@ -120,7 +120,13 @@ NumberCounter.craft = {
   } = props;
 
   const items = counters.length > 0 ? counters : defaultCounters;
-  const uid = 'nc_' + Math.random().toString(36).slice(2, 8);
+
+  // Deterministic AND unique id for this counter instance's wrapper/span
+  // ids and getElementById() calls inside its inline script -- scoped on
+  // the Craft node id so two NumberCounter instances (e.g. both left at
+  // default props) don't collide and end up animating each other's digits.
+  const seed = items.map((c) => `${c.number}${c.suffix}::${c.label}`).join('|');
+  const uid = scopeId(nodeId, seed, 'nc');
 
   const sectionStyle = cssPropsToString({
     padding: '60px 20px',