feat(clients): require Mother + Father/Caretaker as family members before activation

- Add hasMother/hasFather/hasCaretaker/familyRelationshipRulesMet to
  ClientFamilyMembersStepComponent, matched against the RELATIONSHIP code value label.
- Show two independent inline error banners (never merged into one message) when Mother, or
  both Father and Caretaker, are missing.
- Gate "Save & Next" and final Submit on this rule in both the create and edit client flows —
  the edit flow previously treated the Family tab as unconditionally optional.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

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

@@ -238,8 +238,8 @@ export class CreateClientComponent {
         return this.isAddressStepValid();
       }
       if (idx === 3) {
-        // Family tab — relations are optional, always allow.
-        return true;
+        // Family tab — Mother is required, and either Father or a Caretaker.
+        return !this.clientFamilyMembersStep || this.clientFamilyMembersStep.familyRelationshipRulesMet;
       }
     }
     return true;
@@ -273,6 +273,11 @@ export class CreateClientComponent {
         return `Please fill/correct: ${labels.join(', ')}.`;
       }
     }
+    if (idx === 3 && this.legalFormType === 1 && this.clientFamilyMembersStep) {
+      const step = this.clientFamilyMembersStep;
+      if (!step.hasMother) return 'Mother is required as a family member.';
+      if (!step.hasFather && !step.hasCaretaker) return 'Either Father or a Caretaker is required as a family member.';
+    }
     return 'Please fill all mandatory fields on this tab to continue.';
   }
 
@@ -569,6 +574,21 @@ export class CreateClientComponent {
       this.selectedTabIndex = 3;
       return;
     }
+    // Validate: Mother required, and either Father or a Caretaker (Individual clients)
+    if (
+      this.legalFormType === 1 &&
+      this.clientFamilyMembersStep &&
+      !this.clientFamilyMembersStep.familyRelationshipRulesMet
+    ) {
+      const step = this.clientFamilyMembersStep;
+      if (!step.hasMother) {
+        this.validationError = 'Mother is required as a family member.';
+      } else {
+        this.validationError = 'Either Father or a Caretaker is required as a family member.';
+      }
+      this.selectedTabIndex = 3;
+      return;
+    }
     this.validationError = '';
 
     if (this.createdClientId) {