feat(panel): pestaña de alta y baja de niños

Añade la gestión de perfiles de hijo en el panel de padres (crear con
mascota/nombre/edad/color/hora de salida y borrar), que faltaba: una familia
recién registrada empieza sin niños y necesita poder añadirlos. El backend
(CRUD de Child) ya existía; faltaba la UI.

frontend/src/app/core/i18n.service.ts

@@ -40,6 +40,7 @@ export class I18nService {
     wrongPin: { ES: 'PIN incorrecto', CA: 'PIN incorrecte' },
     // Panel de padres
     logout: { ES: 'Salir', CA: 'Sortir' },
+    tabChildren: { ES: 'Niños', CA: 'Nens' },
     tabSchedule: { ES: 'Horario', CA: 'Horari' },
     tabMaterials: { ES: 'Materiales', CA: 'Materials' },
     tabEvents: { ES: 'Eventos', CA: 'Esdeveniments' },

frontend/src/app/features/parents/children-tab.component.ts

@@ -0,0 +1,101 @@
+import { Component, EventEmitter, Output, inject, signal } from '@angular/core';
+import { FormsModule } from '@angular/forms';
+import { ParentApiService } from '../../core/parent-api.service';
+import { I18nService } from '../../core/i18n.service';
+import { ChildSummary } from '../../core/models';
+
+/** Pestaña Niños: dar de alta y de baja perfiles de hijo en la familia. */
+@Component({
+  selector: 'app-children-tab',
+  imports: [FormsModule],
+  template: `
+    <!-- Alta -->
+    <div class="adm-card">
+      <p class="adm-label">Nuevo niño/a</p>
+      <div class="adm-row">
+        <input class="adm-input adm-input--sm" [(ngModel)]="mascot" placeholder="🦊" maxlength="4"
+               aria-label="Mascota (emoji)" />
+        <input class="adm-input" [(ngModel)]="name" placeholder="Nombre" />
+        <input class="adm-input adm-input--sm" type="number" min="1" max="18" [(ngModel)]="age"
+               placeholder="Edad" aria-label="Edad" />
+        <input class="adm-input adm-input--sm" type="time" [(ngModel)]="departureTime"
+               aria-label="Hora de salida" />
+        <input class="adm-input adm-input--sm" type="color" [(ngModel)]="accentColor"
+               aria-label="Color" />
+        <button class="adm-btn" [disabled]="!name || !mascot || !age" (click)="add()">
+          + {{ i18n.t('add') }}
+        </button>
+      </div>
+      <p class="adm-empty" style="text-align:left">
+        La mascota es un emoji y el color identifica al niño en sus tarjetas.
+      </p>
+    </div>
+
+    <!-- Lista -->
+    <div class="adm-card">
+      <p class="adm-label">Perfiles</p>
+      <div class="adm-list">
+        @for (c of children(); track c.id) {
+          <div class="adm-item" [style.borderLeft]="'5px solid ' + c.accentColor">
+            <span style="font-size:28px">{{ c.mascot }}</span>
+            <span class="adm-item__grow"><strong>{{ c.name }}</strong> · {{ c.age }} años · 🪙 {{ c.coins }}</span>
+            <button class="adm-del" (click)="remove(c)" aria-label="Borrar">✕</button>
+          </div>
+        } @empty {
+          <p class="adm-empty">Aún no hay niños. Añade el primero arriba ✨</p>
+        }
+      </div>
+    </div>
+  `,
+})
+export class ChildrenTabComponent {
+  /** Avisa al panel de que la lista de niños cambió (para refrescar el selector). */
+  @Output() changed = new EventEmitter<void>();
+
+  private readonly api = inject(ParentApiService);
+  protected readonly i18n = inject(I18nService);
+
+  protected readonly children = signal<ChildSummary[]>([]);
+
+  protected mascot = '';
+  protected name = '';
+  protected age: number | null = null;
+  protected departureTime = '';
+  protected accentColor = '#F2A65A';
+
+  constructor() {
+    this.reload();
+  }
+
+  private reload(): void {
+    this.api.listChildren().subscribe((list) => this.children.set(list));
+  }
+
+  add(): void {
+    if (!this.name || !this.mascot || !this.age) {
+      return;
+    }
+    this.api
+      .createChild({
+        name: this.name,
+        mascot: this.mascot,
+        accentColor: this.accentColor,
+        age: this.age,
+        departureTime: this.departureTime || undefined,
+      })
+      .subscribe(() => {
+        this.name = this.mascot = this.departureTime = '';
+        this.age = null;
+        this.reload();
+        this.changed.emit();
+      });
+  }
+
+  remove(c: ChildSummary): void {
+    // Borra el niño y todo lo suyo (horario, rutinas, tareas, monedero...).
+    this.api.deleteChild(c.id).subscribe(() => {
+      this.reload();
+      this.changed.emit();
+    });
+  }
+}

frontend/src/app/features/parents/parents.component.ts

@@ -5,19 +5,21 @@ import { ParentApiService } from '../../core/parent-api.service';
 import { AuthService } from '../../core/auth.service';
 import { I18nService } from '../../core/i18n.service';
 import { ChildSummary } from '../../core/models';
+import { ChildrenTabComponent } from './children-tab.component';
 import { ScheduleTabComponent } from './schedule-tab.component';
 import { MaterialsTabComponent } from './materials-tab.component';
 import { EventsTabComponent } from './events-tab.component';
 import { RoutinesTabComponent } from './routines-tab.component';
 import { RewardsTabComponent } from './rewards-tab.component';
 
-type Tab = 'schedule' | 'materials' | 'events' | 'routines' | 'rewards';
+type Tab = 'children' | 'schedule' | 'materials' | 'events' | 'routines' | 'rewards';
 
 /** Panel de padres: barra de pestañas, selector de niño y salida. */
 @Component({
   selector: 'app-parents',
   imports: [
     FormsModule,
+    ChildrenTabComponent,
     ScheduleTabComponent,
     MaterialsTabComponent,
     EventsTabComponent,
@@ -27,6 +29,7 @@ type Tab = 'schedule' | 'materials' | 'events' | 'routines' | 'rewards';
   template: `
     <header class="ptop">
       <div class="ptabs">
+        <button class="ptab" [class.ptab--on]="tab() === 'children'" (click)="tab.set('children')">👦 {{ i18n.t('tabChildren') }}</button>
         <button class="ptab" [class.ptab--on]="tab() === 'schedule'" (click)="tab.set('schedule')">📅 {{ i18n.t('tabSchedule') }}</button>
         <button class="ptab" [class.ptab--on]="tab() === 'materials'" (click)="tab.set('materials')">🎒 {{ i18n.t('tabMaterials') }}</button>
         <button class="ptab" [class.ptab--on]="tab() === 'events'" (click)="tab.set('events')">📋 {{ i18n.t('tabEvents') }}</button>
@@ -37,7 +40,7 @@ type Tab = 'schedule' | 'materials' | 'events' | 'routines' | 'rewards';
     </header>
 
     <main class="pbody">
-      @if (tab() !== 'materials') {
+      @if (tab() !== 'materials' && tab() !== 'children') {
         <div class="pchild">
           <label class="adm-label">{{ i18n.t('child') }}:</label>
           <select class="adm-input" [(ngModel)]="selectedId">
@@ -49,6 +52,7 @@ type Tab = 'schedule' | 'materials' | 'events' | 'routines' | 'rewards';
       }
 
       @switch (tab()) {
+        @case ('children') { <app-children-tab (changed)="reloadChildren()" /> }
         @case ('schedule') { <app-schedule-tab [childId]="selectedId" /> }
         @case ('materials') { <app-materials-tab /> }
         @case ('events') { <app-events-tab [childId]="selectedId" /> }
@@ -95,14 +99,20 @@ export class ParentsComponent {
   protected readonly i18n = inject(I18nService);
 
   protected readonly children = signal<ChildSummary[]>([]);
-  protected readonly tab = signal<Tab>('schedule');
+  protected readonly tab = signal<Tab>('children');
   protected selectedId = 0;
 
   constructor() {
+    this.reloadChildren();
+  }
+
+  /** Recarga la lista de niños y mantiene válido el niño seleccionado. */
+  reloadChildren(): void {
     this.parentApi.listChildren().subscribe((list) => {
       this.children.set(list);
-      if (list.length && !this.selectedId) {
-        this.selectedId = list[0].id;
+      const stillExists = list.some((c) => c.id === this.selectedId);
+      if (!stillExists) {
+        this.selectedId = list.length ? list[0].id : 0;
       }
     });
   }