fix(credit-bureau): keep customer enquiry list stable and add back navigation in alert detail

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/app/credit-bureau/cic-alert-detail/cic-alert-detail.component.html

@@ -12,6 +12,12 @@
       <div class="cic-empty">Loading…</div>
     }
     @if (alert) {
+      @if (history.length) {
+        <div class="cic-alert info" style="margin-bottom: 12px">
+          You are viewing another enquiry of this customer.
+          <button class="cic-btn sm" style="margin-left: 8px" (click)="back()">← Back to previous enquiry</button>
+        </div>
+      }
       <div style="display: flex; justify-content: space-between; gap: 12px; align-items: flex-start">
         <div>
           <h3 style="margin-bottom: 4px">
@@ -160,8 +166,8 @@
       @if (alert.otherAlertsOfCustomer?.length) {
         <div class="cic-card" style="margin-top: 14px; margin-bottom: 0">
           <h2>
-            Other enquiries on this customer
-            <span class="cic-card-sub">{{ alert.otherAlertsOfCustomer?.length }} more</span>
+            All enquiries on this customer
+            <span class="cic-card-sub">{{ customerEnquiries.length }} in total</span>
           </h2>
           <div class="cic-table-wrap">
             <table class="cic-table">
@@ -174,10 +180,19 @@
                 </tr>
               </thead>
               <tbody>
-                @for (o of alert.otherAlertsOfCustomer; track o.id) {
-                  <tr class="clickable" (click)="alertId = o.id; load()">
+                @for (o of customerEnquiries; track o.id) {
+                  <tr
+                    class="clickable"
+                    [style.background]="o.id === alert.id ? '#eef4ff' : null"
+                    (click)="o.id !== alert.id && openOther(o.id)"
+                  >
                     <td>{{ o.enquiryDate | date: 'dd MMM yyyy' }}</td>
-                    <td>{{ o.loanType }}</td>
+                    <td>
+                      {{ o.loanType }}
+                      @if (o.id === alert.id) {
+                        <b>(shown above)</b>
+                      }
+                    </td>
                     <td class="num">{{ o.amount | number: '1.0-0' }}</td>
                     <td>
                       <span class="cic-badge" [class]="'cic-badge ' + statusTone(o.status)">{{ o.status }}</span>