merege code this branch /feature/UI-DSC-MFA

src/app/clients/client-stepper/client-family-members-step/client-family-member-dialog/client-family-member-dialog.component.html

@@ -298,9 +298,15 @@
             <mat-label>Relationship</mat-label>
             <mat-select required formControlName="relationshipId">
               @for (rel of data.options.relationshipIdOptions; track rel) {
-                <mat-option [value]="rel.id">{{ rel.name }}</mat-option>
+                <mat-option [value]="rel.id" [disabled]="disabledRelationshipIds.has(rel.id)">
+                  {{ rel.name }}
+                  @if (disabledRelationshipIds.has(rel.id)) {
+                    <span class="fm-rel-taken">· already added</span>
+                  }
+                </mat-option>
               }
             </mat-select>
+            <mat-hint>Father, Mother and Spouse can only be added once.</mat-hint>
           </mat-form-field>
 
           @if (entryMode === 'manual') {

src/app/clients/client-stepper/client-family-members-step/client-family-member-dialog/client-family-member-dialog.component.scss

@@ -28,6 +28,14 @@
   margin-bottom: 16px;
 }
 
+/* Suffix shown next to disabled relationship options (Father/Mother/Spouse already added). */
+.fm-rel-taken {
+  margin-left: 4px;
+  font-size: 11px;
+  font-style: italic;
+  color: #94a3b8;
+}
+
 .fm-mode-btn {
   display: inline-flex;
   align-items: center;

src/app/clients/client-stepper/client-family-members-step/client-family-member-dialog/client-family-member-dialog.component.ts

@@ -86,6 +86,42 @@ export class ClientFamilyMemberDialogComponent implements OnInit {
     return rel?.name?.toUpperCase() === 'SPOUSE';
   }
 
+  /**
+   * Relationships that may appear at most once per client. Names compared
+   * case-insensitively against the option list returned by the backend.
+   */
+  private static readonly UNIQUE_RELATIONSHIPS = new Set([
+    'FATHER',
+    'MOTHER',
+    'SPOUSE'
+  ]);
+
+  /**
+   * Set of relationshipId values that are already taken by another family
+   * member and should therefore be disabled in the dropdown. The member
+   * currently being edited is excluded so its existing relationship stays
+   * selectable. Empty set in Add mode when no unique relations exist yet.
+   */
+  get disabledRelationshipIds(): Set<number> {
+    const disabled = new Set<number>();
+    const existing = this.data?.existingMembers || [];
+    const options = this.data?.options?.relationshipIdOptions || [];
+    if (!existing.length || !options.length) return disabled;
+    const editingId = this.data?.context === 'Edit' ? this.data?.member?.id : undefined;
+    for (const m of existing) {
+      // Skip the member being edited so it can keep its current selection.
+      if (editingId && m.id === editingId) continue;
+      const relId = typeof m.relationshipId === 'object' ? m.relationshipId?.id : m.relationshipId;
+      if (relId == null) continue;
+      const rel = options.find((r: any) => r.id === relId);
+      const name = (rel?.name || '').toUpperCase();
+      if (ClientFamilyMemberDialogComponent.UNIQUE_RELATIONSHIPS.has(name)) {
+        disabled.add(relId);
+      }
+    }
+    return disabled;
+  }
+
   /** Whether dialog is in View-only mode */
   get isViewMode(): boolean {
     return this.data.context === 'View';

src/app/clients/client-stepper/client-family-members-step/client-family-members-step.component.ts

@@ -132,7 +132,11 @@ export class ClientFamilyMembersStepComponent implements OnInit {
 
   addFamilyMember() {
     const ref = this.dialog.open(ClientFamilyMemberDialogComponent, {
-      data: { context: 'Add', options: this.clientTemplate.familyMemberOptions },
+      data: {
+        context: 'Add',
+        options: this.clientTemplate.familyMemberOptions,
+        existingMembers: this.clientFamilyMembers
+      },
       width: '640px',
       maxWidth: '95vw',
       panelClass: 'fm-dialog-panel'
@@ -146,7 +150,12 @@ export class ClientFamilyMembersStepComponent implements OnInit {
 
   viewFamilyMember(member: any) {
     this.dialog.open(ClientFamilyMemberDialogComponent, {
-      data: { context: 'View', member, options: this.clientTemplate.familyMemberOptions },
+      data: {
+        context: 'View',
+        member,
+        options: this.clientTemplate.familyMemberOptions,
+        existingMembers: this.clientFamilyMembers
+      },
       width: '640px',
       maxWidth: '95vw',
       panelClass: 'fm-dialog-panel'
@@ -155,7 +164,12 @@ export class ClientFamilyMembersStepComponent implements OnInit {
 
   editFamilyMember(member: any, index: number) {
     const ref = this.dialog.open(ClientFamilyMemberDialogComponent, {
-      data: { context: 'Edit', member, options: this.clientTemplate.familyMemberOptions },
+      data: {
+        context: 'Edit',
+        member,
+        options: this.clientTemplate.familyMemberOptions,
+        existingMembers: this.clientFamilyMembers
+      },
       width: '640px',
       maxWidth: '95vw',
       panelClass: 'fm-dialog-panel'