fix(dashboard): Preserve selector tab state on draft order customer/address selectors

Reset the customer selector tab to 'existing' when a customer is selected
or created (programmatic close does not trigger onOpenChange), and preserve
an explicitly chosen 'new' tab in the address selector while the address
query transitions from loading to loaded.

Relates to vendurehq#4810

Author: Ryrahul

packages/dashboard/src/app/routes/_authenticated/_orders/components/customer-address-selector.tsx

@@ -51,7 +51,10 @@ export function CustomerAddressSelector({
     // Existing addresses are only selectable when a customer with saved addresses is present.
     // Otherwise, the admin can only enter a new ad-hoc address (matching the Angular admin-ui).
     const canSelectExisting = !!customerId && addresses.length > 0;
-    const effectiveTab = canSelectExisting ? activeTab : 'new';
+    // Only force the "new" tab once we know the customer has no selectable addresses. While the
+    // query is still loading we honour the explicitly chosen tab so the selection doesn't jump
+    // when the addresses transition from loading to loaded.
+    const effectiveTab = canSelectExisting || (!!customerId && isLoading) ? activeTab : 'new';
 
     return (
         <Popover

packages/dashboard/src/lib/components/shared/customer-selector.tsx

@@ -261,6 +261,7 @@ export function CustomerSelector(props: CustomerSelectorProps) {
                                     onSelect={customer => {
                                         props.onSelect(customer);
                                         setOpen(false);
+                                        setActiveTab('existing');
                                     }}
                                 />
                             </div>
@@ -271,6 +272,7 @@ export function CustomerSelector(props: CustomerSelectorProps) {
                                     onSubmit={input => {
                                         props.onCreateNew?.(input);
                                         setOpen(false);
+                                        setActiveTab('existing');
                                     }}
                                 />
                             </div>