feat(create-client): auto-link family member after client creation

- After creating a client from 'Create as Client' button, automatically
  call PUT /clients/{parentId}/familymembers/{memberId} with the new
  linkedClientId to link the family member record
- Show snackbar feedback on success or failure of the auto-link
- nomination-apply now also passes familyMemberId and parentClientId
  in prefill state so auto-link works from the nomination page too

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/clients/create-client/create-client.component.ts

@@ -35,6 +35,7 @@ import { FaIconComponent } from '@fortawesome/angular-fontawesome';
 import { MatProgressSpinner } from '@angular/material/progress-spinner';
 import { MatProgressBarModule } from '@angular/material/progress-bar';
 import { MatDialog, MAT_DIALOG_DATA, MatDialogClose } from '@angular/material/dialog';
+import { MatSnackBar } from '@angular/material/snack-bar';
 import { MatTooltip } from '@angular/material/tooltip';
 import { Inject } from '@angular/core';
 import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
@@ -71,6 +72,7 @@ export class CreateClientComponent {
   private clientsService = inject(ClientsService);
   private settingsService = inject(SettingsService);
   private dialog = inject(MatDialog);
+  private snackBar = inject(MatSnackBar);
 
   @ViewChild(ClientGeneralStepComponent) clientGeneralStep: ClientGeneralStepComponent;
   @ViewChild('clientAddress') clientAddressStep: ClientAddressStepComponent;
@@ -520,7 +522,7 @@ export class CreateClientComponent {
    * Finalize: upload photo/signature, save KYC, save addresses, then navigate.
    */
   private finalizeClient(clientId: string) {
-    const navigateToClient = () =>
+    const doNavigate = () =>
       this.router.navigate(
         [
           '../',
@@ -529,6 +531,32 @@ export class CreateClientComponent {
         { relativeTo: this.route }
       );
 
+    const navigateToClient = () => {
+      const fm = this.prefillData;
+      if (fm?.familyMemberId && fm?.parentClientId) {
+        this.clientsService
+          .editFamilyMember(fm.parentClientId.toString(), fm.familyMemberId.toString(), {
+            linkedClientId: Number(clientId)
+          })
+          .subscribe({
+            next: () => {
+              this.snackBar.open('Family member linked to this client successfully.', 'Close', { duration: 4000 });
+              doNavigate();
+            },
+            error: () => {
+              this.snackBar.open(
+                'Client created, but family member could not be auto-linked. Please link manually.',
+                'Close',
+                { duration: 6000 }
+              );
+              doNavigate();
+            }
+          });
+      } else {
+        doNavigate();
+      }
+    };
+
     // Upload photo if selected
     if (this.clientKycStep?.photographFile) {
       this.clientsService

src/app/election/components/nomination-apply/nomination-apply.component.ts

@@ -135,7 +135,9 @@ export class NominationApplyComponent implements OnInit {
       mobileNo: member.mobileNumber || '',
       dateOfBirth: member.dateOfBirth || null,
       panNumber: member.panNumber || '',
-      aadhaarNumber: member.aadhaarNumber || ''
+      aadhaarNumber: member.aadhaarNumber || '',
+      familyMemberId: member.id,
+      parentClientId: this.selectedMemberId
     };
     this.router.navigate(
       [