diff --git a/libs/ui/README.md b/libs/ui/README.md
index e384b20..eff057f 100644
--- a/libs/ui/README.md
+++ b/libs/ui/README.md
@@ -184,11 +184,21 @@ Detalles a tener en cuenta:
 - **`Dataset.cubicInterpolationMode` pasa a opcional.** Solo tiene sentido en
   `line`; forzarlo en `bar`/`pie`/`doughnut` no aportaba nada y esos tipos ni
   siquiera usan `Dataset` (los dos últimos usan `ChartSlice`).
+- **Cada gráfico registra lo suyo en `buildChart()`, no al importar.** El
+  paquete es un único `fesm`, así que un `Chart.register(...)` a nivel de
+  módulo se ejecutaba en cualquier app que importase `@pi/ui` y metía Chart.js
+  entero en su bundle inicial, pintase gráficos o no (en TaskStream, unos
+  230 kB). Registrar dos veces lo mismo no hace nada. Si se añade un tipo de
+  gráfico, su registro va ahí también.
 - **El `type="bar"` del `pi-chart` original nunca funcionó**: el input
   existía pero `getLineChartConfigs()` construía siempre un chart `line`
   ignorando su valor. Se descubrió al dividir los componentes; `pi-bar-chart`
   es la primera versión que realmente renderiza barras.
 
+**`lodash` se importa por función** (`lodash/isEqual`, `lodash/some`,
+`lodash/capitalize`), nunca `import _ from 'lodash'`: lodash es CommonJS y el
+import completo mete la librería entera en el bundle de quien use un select.
+
 **El loader de servidor de traducciones ya no está en el barrel.**
 `util/translate/loaders/translate-server.loader` usa `fs`, `path` y `process`;
 exportarlo desde `@pi/ui` rompía el bundle de navegador de cualquier app que
diff --git a/libs/ui/src/lib/ui/chart/bar-chart/bar-chart.component.ts b/libs/ui/src/lib/ui/chart/bar-chart/bar-chart.component.ts
index cf45024..3b69dab 100644
--- a/libs/ui/src/lib/ui/chart/bar-chart/bar-chart.component.ts
+++ b/libs/ui/src/lib/ui/chart/bar-chart/bar-chart.component.ts
@@ -12,8 +12,6 @@ import { barDatasetConfig } from '../chart.configs';
 import { PiBaseCartesianChartComponent } from '../base-cartesian-chart.component';
 import { PiChartLegendComponent } from '../chart-legend/chart-legend.component';
 
-Chart.register(CategoryScale, LinearScale, BarController, BarElement, Tooltip, Legend);
-
 @Component({
   selector: 'pi-bar-chart',
   templateUrl: './bar-chart.component.html',
@@ -30,6 +28,9 @@ export class PiBarChartComponent extends PiBaseCartesianChartComponent {
   }
 
   protected buildChart(): Chart {
+    // Aquí y no al importar: así una app que nunca pinta este gráfico no
+    // arrastra Chart.js. Registrar dos veces no hace nada.
+    Chart.register(CategoryScale, LinearScale, BarController, BarElement, Tooltip, Legend);
     return new Chart(this.chartRef().nativeElement, {
       type: 'bar',
       data: {
diff --git a/libs/ui/src/lib/ui/chart/base-chart.component.ts b/libs/ui/src/lib/ui/chart/base-chart.component.ts
index 8215739..e4945b3 100644
--- a/libs/ui/src/lib/ui/chart/base-chart.component.ts
+++ b/libs/ui/src/lib/ui/chart/base-chart.component.ts
@@ -15,9 +15,10 @@ import { Device } from '../../util/device-configs';
  * `pi-pie-chart`, `pi-doughnut-chart`): el `<canvas>`, el ciclo de vida que
  * construye el `Chart` una vez la vista está lista, y el `TranslateService`
  * que todos usan para las etiquetas. Cada tipo registra solo los
- * controladores/elementos de Chart.js que necesita — no hay un registro
- * global compartido, así que un consumidor que solo importe `pi-pie-chart`
- * no arrastra el código de líneas/barras.
+ * controladores/elementos de Chart.js que necesita, y lo hace en
+ * `buildChart`, no al importar el módulo: el paquete es un único `fesm`, así
+ * que un `Chart.register` a nivel de módulo metería Chart.js entero en el
+ * bundle inicial de cualquier app que use `@pi/ui`, pinte gráficos o no.
  */
 @Component({ template: '' })
 export abstract class PiBaseChartComponent implements AfterViewInit {
diff --git a/libs/ui/src/lib/ui/chart/doughnut-chart/doughnut-chart.component.ts b/libs/ui/src/lib/ui/chart/doughnut-chart/doughnut-chart.component.ts
index ef2a587..0821463 100644
--- a/libs/ui/src/lib/ui/chart/doughnut-chart/doughnut-chart.component.ts
+++ b/libs/ui/src/lib/ui/chart/doughnut-chart/doughnut-chart.component.ts
@@ -8,8 +8,6 @@ import {
 } from 'chart.js';
 import { PiBaseArcChartComponent } from '../base-arc-chart.component';
 
-Chart.register(ArcElement, DoughnutController, Tooltip, Legend);
-
 @Component({
   selector: 'pi-doughnut-chart',
   templateUrl: './doughnut-chart.component.html',
@@ -18,6 +16,9 @@ Chart.register(ArcElement, DoughnutController, Tooltip, Legend);
 })
 export class PiDoughnutChartComponent extends PiBaseArcChartComponent {
   protected buildChart(): Chart {
+    // Aquí y no al importar: así una app que nunca pinta este gráfico no
+    // arrastra Chart.js. Registrar dos veces no hace nada.
+    Chart.register(ArcElement, DoughnutController, Tooltip, Legend);
     return new Chart(this.chartRef().nativeElement, {
       type: 'doughnut',
       data: this.getArcData<'doughnut'>(),
diff --git a/libs/ui/src/lib/ui/chart/gauge-chart/gauge-chart.component.ts b/libs/ui/src/lib/ui/chart/gauge-chart/gauge-chart.component.ts
index 6ef6660..ca25de4 100644
--- a/libs/ui/src/lib/ui/chart/gauge-chart/gauge-chart.component.ts
+++ b/libs/ui/src/lib/ui/chart/gauge-chart/gauge-chart.component.ts
@@ -8,8 +8,6 @@ import { ArcElement, Chart, DoughnutController } from 'chart.js';
 import { DatasetColor } from '../../../util/models';
 import { PiBaseChartComponent } from '../base-chart.component';
 
-Chart.register(ArcElement, DoughnutController);
-
 /**
  * Un único valor sobre `max`, no una serie ni porciones — por eso extiende
  * directamente `PiBaseChartComponent` (la base raíz) en vez de
@@ -36,6 +34,9 @@ export class PiGaugeChartComponent extends PiBaseChartComponent {
   );
 
   protected buildChart(): Chart {
+    // Aquí y no al importar: así una app que nunca pinta este gráfico no
+    // arrastra Chart.js. Registrar dos veces no hace nada.
+    Chart.register(ArcElement, DoughnutController);
     const clamped = this.clampedValue();
     return new Chart(this.chartRef().nativeElement, {
       type: 'doughnut',
diff --git a/libs/ui/src/lib/ui/chart/line-chart/line-chart.component.ts b/libs/ui/src/lib/ui/chart/line-chart/line-chart.component.ts
index 392aaa4..5fd5a3c 100644
--- a/libs/ui/src/lib/ui/chart/line-chart/line-chart.component.ts
+++ b/libs/ui/src/lib/ui/chart/line-chart/line-chart.component.ts
@@ -14,17 +14,6 @@ import { hexToRgba, lineDatasetConfig } from '../chart.configs';
 import { PiBaseCartesianChartComponent } from '../base-cartesian-chart.component';
 import { PiChartLegendComponent } from '../chart-legend/chart-legend.component';
 
-Chart.register(
-  CategoryScale,
-  LinearScale,
-  LineController,
-  LineElement,
-  PointElement,
-  Filler,
-  Tooltip,
-  Legend,
-);
-
 @Component({
   selector: 'pi-line-chart',
   templateUrl: './line-chart.component.html',
@@ -61,6 +50,9 @@ export class PiLineChartComponent extends PiBaseCartesianChartComponent {
   }
 
   protected buildChart(): Chart {
+    // Aquí y no al importar: así una app que nunca pinta este gráfico no
+    // arrastra Chart.js. Registrar dos veces no hace nada.
+    Chart.register(CategoryScale, LinearScale, LineController, LineElement, PointElement, Filler, Tooltip, Legend);
     return new Chart(this.chartRef().nativeElement, {
       type: 'line',
       data: {
diff --git a/libs/ui/src/lib/ui/chart/pie-chart/pie-chart.component.ts b/libs/ui/src/lib/ui/chart/pie-chart/pie-chart.component.ts
index 74f8fa2..8b7c378 100644
--- a/libs/ui/src/lib/ui/chart/pie-chart/pie-chart.component.ts
+++ b/libs/ui/src/lib/ui/chart/pie-chart/pie-chart.component.ts
@@ -2,8 +2,6 @@ import { ChangeDetectionStrategy, Component } from '@angular/core';
 import { ArcElement, Chart, Legend, PieController, Tooltip } from 'chart.js';
 import { PiBaseArcChartComponent } from '../base-arc-chart.component';
 
-Chart.register(ArcElement, PieController, Tooltip, Legend);
-
 @Component({
   selector: 'pi-pie-chart',
   templateUrl: './pie-chart.component.html',
@@ -12,6 +10,9 @@ Chart.register(ArcElement, PieController, Tooltip, Legend);
 })
 export class PiPieChartComponent extends PiBaseArcChartComponent {
   protected buildChart(): Chart {
+    // Aquí y no al importar: así una app que nunca pinta este gráfico no
+    // arrastra Chart.js. Registrar dos veces no hace nada.
+    Chart.register(ArcElement, PieController, Tooltip, Legend);
     return new Chart(this.chartRef().nativeElement, {
       type: 'pie',
       data: this.getArcData<'pie'>(),
diff --git a/libs/ui/src/lib/ui/chart/radar-chart/radar-chart.component.ts b/libs/ui/src/lib/ui/chart/radar-chart/radar-chart.component.ts
index 05a22e8..724b2ec 100644
--- a/libs/ui/src/lib/ui/chart/radar-chart/radar-chart.component.ts
+++ b/libs/ui/src/lib/ui/chart/radar-chart/radar-chart.component.ts
@@ -17,16 +17,6 @@ import { hexToRgba, lineDatasetConfig, tooltipConfig } from '../chart.configs';
 import { PiBaseCartesianChartComponent } from '../base-cartesian-chart.component';
 import { PiChartLegendComponent } from '../chart-legend/chart-legend.component';
 
-Chart.register(
-  RadarController,
-  RadialLinearScale,
-  LineElement,
-  PointElement,
-  Filler,
-  Tooltip,
-  Legend,
-);
-
 /**
  * A diferencia de `pi-line-chart`/`pi-bar-chart`, la escala radial (`r`) no
  * encaja en `scalesConfig` (pensado para `x`/`y`), así que no reutiliza
@@ -94,6 +84,9 @@ export class PiRadarChartComponent extends PiBaseCartesianChartComponent {
   }
 
   protected buildChart(): Chart {
+    // Aquí y no al importar: así una app que nunca pinta este gráfico no
+    // arrastra Chart.js. Registrar dos veces no hace nada.
+    Chart.register(RadarController, RadialLinearScale, LineElement, PointElement, Filler, Tooltip, Legend);
     return new Chart(this.chartRef().nativeElement, {
       type: 'radar',
       data: {
diff --git a/libs/ui/src/lib/ui/chip/chip-date/chip-date.component.ts b/libs/ui/src/lib/ui/chip/chip-date/chip-date.component.ts
index b66ee8c..d9e2496 100644
--- a/libs/ui/src/lib/ui/chip/chip-date/chip-date.component.ts
+++ b/libs/ui/src/lib/ui/chip/chip-date/chip-date.component.ts
@@ -10,7 +10,7 @@ import { ComponentFamilyClass, theming } from '../../../styles';
 import { Date } from '../../../util/models';
 import { PiBaseChipComponent } from '../base-chip.component';
 import { DateTime } from 'luxon';
-import _ from 'lodash';
+import capitalize from 'lodash/capitalize';
 
 @Component({
   selector: 'pi-chip-date',
@@ -73,8 +73,8 @@ export class PiChipDateComponent extends PiBaseChipComponent {
       day: dateObj.day.toString() || '',
       month: dateObj.monthShort || '',
       weekDay: isDateToday
-        ? _.capitalize(dateObj.toRelativeCalendar() ?? '')
-        : _.capitalize(dateObj.weekdayShort || ''),
+        ? capitalize(dateObj.toRelativeCalendar() ?? '')
+        : capitalize(dateObj.weekdayShort || ''),
     };
   }
 }
diff --git a/libs/ui/src/lib/ui/select/select-carousel/select-carousel.component.ts b/libs/ui/src/lib/ui/select/select-carousel/select-carousel.component.ts
index 15a719b..2cf5920 100644
--- a/libs/ui/src/lib/ui/select/select-carousel/select-carousel.component.ts
+++ b/libs/ui/src/lib/ui/select/select-carousel/select-carousel.component.ts
@@ -9,7 +9,7 @@ import {
   inject,
 } from '@angular/core';
 import { TranslateService, TranslatePipe } from '@ngx-translate/core';
-import _ from 'lodash';
+import isEqual from 'lodash/isEqual';
 import { PiBaseSelectComponent } from '../base-select.component';
 import { PiSelectOptionComponent } from '../select-option/select-option.component';
 import { Device } from '../../../util/device-configs';
@@ -97,7 +97,7 @@ export class PiSelectCarouselComponent
    * @returns The selected option.
    */
   get selectedOption(): any {
-    return this.options().find((option) => _.isEqual(this.value(), option));
+    return this.options().find((option) => isEqual(this.value(), option));
   }
 
   /**
diff --git a/libs/ui/src/lib/ui/select/select-multiple/select-multiple.component.ts b/libs/ui/src/lib/ui/select/select-multiple/select-multiple.component.ts
index 45b3b73..9a51568 100644
--- a/libs/ui/src/lib/ui/select/select-multiple/select-multiple.component.ts
+++ b/libs/ui/src/lib/ui/select/select-multiple/select-multiple.component.ts
@@ -11,7 +11,7 @@ import {
 import { TranslateService, TranslatePipe } from '@ngx-translate/core';
 import { PiBaseSelectComponent } from '../base-select.component';
 import { PiSelectOptionComponent } from '../select-option/select-option.component';
-import _ from 'lodash';
+import some from 'lodash/some';
 import { MatCheckboxChange, MatCheckbox } from '@angular/material/checkbox';
 import { NgTemplateOutlet } from '@angular/common';
 import { PiIconComponent } from '../../icon/icon/icon.component';
@@ -114,7 +114,7 @@ export class PiSelectMultipleComponent
   get selectedOptions(): Array<any> {
     const value = this.value();
     if (!value) return [];
-    return this.options().filter((option) => _.some(value, option));
+    return this.options().filter((option) => some(value, option));
   }
 
   /**
diff --git a/libs/ui/src/lib/ui/select/select-period/select-period.component.ts b/libs/ui/src/lib/ui/select/select-period/select-period.component.ts
index 413218a..439d2ab 100644
--- a/libs/ui/src/lib/ui/select/select-period/select-period.component.ts
+++ b/libs/ui/src/lib/ui/select/select-period/select-period.component.ts
@@ -11,7 +11,7 @@ import {
 import { TranslateService, TranslatePipe } from '@ngx-translate/core';
 import { PiBaseSelectComponent } from '../base-select.component';
 import { PiSelectOptionComponent } from '../select-option/select-option.component';
-import _ from 'lodash';
+import isEqual from 'lodash/isEqual';
 import { NgTemplateOutlet } from '@angular/common';
 import { PiIconComponent } from '../../icon/icon/icon.component';
 import { PiDisabledDirective } from '../../../util/status/directives/status.directive';
@@ -103,7 +103,7 @@ export class PiSelectPeriodComponent
    * @returns The selected option.
    */
   get selectedOption(): any {
-    return this.options().find((option) => _.isEqual(this.value(), option));
+    return this.options().find((option) => isEqual(this.value(), option));
   }
 
   /**
diff --git a/libs/ui/src/lib/ui/select/select/select.component.ts b/libs/ui/src/lib/ui/select/select/select.component.ts
index 58f6125..616c598 100644
--- a/libs/ui/src/lib/ui/select/select/select.component.ts
+++ b/libs/ui/src/lib/ui/select/select/select.component.ts
@@ -13,7 +13,7 @@ import {
 import { TranslateService, TranslatePipe } from '@ngx-translate/core';
 import { PiBaseSelectComponent } from '../base-select.component';
 import { PiSelectOptionComponent } from '../select-option/select-option.component';
-import _ from 'lodash';
+import isEqual from 'lodash/isEqual';
 import { NgTemplateOutlet } from '@angular/common';
 import { PiIconComponent } from '../../icon/icon/icon.component';
 import { PiDisabledDirective } from '../../../util/status/directives/status.directive';
@@ -116,7 +116,7 @@ export class PiSelectComponent
    * @returns The selected option.
    */
   get selectedOption(): any {
-    return this.options().find((option) => _.isEqual(this.value(), option));
+    return this.options().find((option) => isEqual(this.value(), option));
   }
 
   /**