added 家族データ保存・死亡判定

src/app/models/family.ts

   motherId: string;
   spouseId: string;
   gender: string;
+  death: boolean;
 }

src/app/pages/family-edit/family-edit.ts

       motherId: this.familyForm.value.motherId ?? '',
       spouseId: currentSpouseId,
       gender: this.familyForm.value.gender ?? 'unknown',
+      death: false,
     };
 
     if (spouseId) {

src/app/pages/kakocho-edit/kakocho-edit.ts

       );
 
       if (this.sourceFamily) {
-        await this.familyService.deleteFamily(this.sourceFamily.id);
+        // await this.familyService.deleteFamily(this.sourceFamily.id);
+        this.sourceFamily.death = true;
+        await this.familyService.saveFamily(this.sourceFamily);
       }
     }