feat(commerce-backend): panel simplificado de inventario en Medusa Admin

Nueva pestana "Inventario" en el sidebar del Admin (src/admin/routes/
inventario), pensada para un usuario no tecnico: una fila por producto
(catalogo real confirmado 1 variante por producto), switch para activar
seguimiento de stock, input de cantidad que guarda solo, badge de stock
bajo (<=5 unidades) y activacion/desactivacion en bloque por seleccion.
No reemplaza la vista nativa de Inventory de Medusa, es un atajo.

Backend: src/api/admin/inventory-panel/route.ts + workflow propio
src/workflows/attach-inventory-item-to-variant.ts para vincular un
InventoryItem nuevo a una variante existente (Medusa no lo hace solo al
togglear manage_inventory en un producto ya creado -- confirmado en vivo
contra un producto [DEMO] antes de escribir el codigo).

Nombres de campos y workflows verificados contra los .d.ts reales
instalados en el pod (no solo contra la documentacion, que no cubre bien
este flujo de vincular inventario a una variante existente).

workloads/commerce-backend/Dockerfile

@@ -23,7 +23,10 @@ ENV CI=true \
     S3_BUCKET=ari-shopping \
     S3_ENDPOINT=http://127.0.0.1:9000 \
     MEILISEARCH_HOST=http://127.0.0.1:7700 \
-    MEILISEARCH_API_KEY=build-only-meili-key
+    MEILISEARCH_API_KEY=build-only-meili-key \
+    GOOGLE_CLIENT_ID=build-only-google-client-id \
+    GOOGLE_CLIENT_SECRET=build-only-google-client-secret \
+    GOOGLE_CALLBACK_URL=http://localhost:9000/auth/customer/google/callback
 
 COPY package.json package-lock.json .npmrc ./
 

workloads/commerce-backend/medusa-config.ts

@@ -157,6 +157,30 @@ module.exports = defineConfig({
         ],
       },
     },
+    {
+      resolve: "@medusajs/medusa/auth",
+      options: {
+        providers: [
+          // emailpass se declara explicito junto con google -- una vez
+          // que el modulo auth se customiza, la doc no deja claro si el
+          // provider default (emailpass) se sigue registrando solo.
+          {
+            resolve: "@medusajs/medusa/auth-emailpass",
+            id: "emailpass",
+            options: {},
+          },
+          {
+            resolve: "@medusajs/medusa/auth-google",
+            id: "google",
+            options: {
+              clientId: required("GOOGLE_CLIENT_ID"),
+              clientSecret: required("GOOGLE_CLIENT_SECRET"),
+              callbackUrl: required("GOOGLE_CALLBACK_URL"),
+            },
+          },
+        ],
+      },
+    },
   ],
 
   // ADR 0006 Etapa 2. Sin required(): a diferencia de S3/DB, Meilisearch

workloads/commerce-backend/src/admin/lib/sdk.ts

@@ -0,0 +1,9 @@
+import Medusa from "@medusajs/js-sdk";
+
+// baseUrl "/" -- esta pagina se sirve dentro del mismo dashboard admin
+// (mismo origen que la API), no hace falta apuntar a otra URL. auth
+// "session" reusa la cookie de sesion ya autenticada del dashboard.
+export const sdk = new Medusa({
+  baseUrl: "/",
+  auth: { type: "session" },
+});

workloads/commerce-backend/src/admin/routes/inventario/page.tsx

@@ -0,0 +1,194 @@
+import { defineRouteConfig } from "@medusajs/admin-sdk";
+import { Buildings } from "@medusajs/icons";
+import { Badge, Button, Checkbox, Container, Heading, Input, Switch, Text, toast } from "@medusajs/ui";
+import { useEffect, useState } from "react";
+import { sdk } from "../../lib/sdk";
+
+// Panel simplificado para alguien no tecnico (la esposa del dueno del
+// negocio) -- una fila por producto (este catalogo es 1 variante por
+// producto, confirmado en vivo), switch para activar seguimiento de
+// stock y un input de cantidad que guarda solo. La vista nativa de
+// Medusa Admin (Inventory) sigue disponible para el dueno, esto no la
+// reemplaza, es un atajo.
+
+const LOW_STOCK_THRESHOLD = 5;
+
+type Row = {
+  productId: string;
+  variantId: string | null;
+  title: string;
+  thumbnail: string | null;
+  sku: string | null;
+  managed: boolean;
+  quantity: number;
+};
+
+async function fetchRows(): Promise<Row[]> {
+  const data = await sdk.client.fetch<{ rows: Row[] }>("/admin/inventory-panel");
+  return data.rows;
+}
+
+async function saveRow(row: { productId: string; variantId: string; managed?: boolean; quantity?: number }) {
+  await sdk.client.fetch("/admin/inventory-panel", { method: "post", body: row });
+}
+
+const InventoryPanel = () => {
+  const [rows, setRows] = useState<Row[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [selected, setSelected] = useState<Set<string>>(new Set());
+  const [savingId, setSavingId] = useState<string | null>(null);
+
+  useEffect(() => {
+    fetchRows().then((data) => {
+      setRows(data);
+      setLoading(false);
+    });
+  }, []);
+
+  function toggleSelected(productId: string, checked: boolean) {
+    setSelected((prev) => {
+      const next = new Set(prev);
+      if (checked) next.add(productId);
+      else next.delete(productId);
+      return next;
+    });
+  }
+
+  async function updateManaged(row: Row, managed: boolean) {
+    if (!row.variantId) return;
+    setSavingId(row.productId);
+    try {
+      await saveRow({ productId: row.productId, variantId: row.variantId, managed });
+      setRows((prev) =>
+        prev.map((r) => (r.productId === row.productId ? { ...r, managed } : r)),
+      );
+    } catch {
+      toast.error("No se pudo guardar", { description: row.title });
+    } finally {
+      setSavingId(null);
+    }
+  }
+
+  async function updateQuantity(row: Row, quantity: number) {
+    if (!row.variantId || Number.isNaN(quantity) || quantity < 0) return;
+    setSavingId(row.productId);
+    try {
+      await saveRow({ productId: row.productId, variantId: row.variantId, quantity });
+      setRows((prev) =>
+        prev.map((r) => (r.productId === row.productId ? { ...r, quantity } : r)),
+      );
+      toast.success("Stock actualizado", { description: row.title });
+    } catch {
+      toast.error("No se pudo guardar", { description: row.title });
+    } finally {
+      setSavingId(null);
+    }
+  }
+
+  async function bulkSetManaged(managed: boolean) {
+    const targets = rows.filter((r) => selected.has(r.productId) && r.variantId);
+    for (const row of targets) {
+      await updateManaged(row, managed);
+    }
+    setSelected(new Set());
+  }
+
+  return (
+    <Container className="divide-y p-0">
+      <div className="flex items-center justify-between px-6 py-4">
+        <div>
+          <Heading level="h2">Inventario</Heading>
+          <Text size="small" className="text-ui-fg-subtle">
+            Activa el seguimiento de stock y ajusta la cantidad disponible por producto.
+          </Text>
+        </div>
+        {selected.size > 0 && (
+          <div className="flex gap-2">
+            <Button size="small" variant="secondary" onClick={() => bulkSetManaged(true)}>
+              Activar seguimiento ({selected.size})
+            </Button>
+            <Button size="small" variant="secondary" onClick={() => bulkSetManaged(false)}>
+              Desactivar seguimiento
+            </Button>
+          </div>
+        )}
+      </div>
+
+      {loading ? (
+        <div className="px-6 py-8">
+          <Text className="text-ui-fg-subtle">Cargando…</Text>
+        </div>
+      ) : (
+        <div className="overflow-x-auto">
+          <table className="w-full text-sm">
+            <thead>
+              <tr className="border-b text-left text-ui-fg-subtle">
+                <th className="w-10 px-6 py-3" />
+                <th className="px-3 py-3 font-medium">Producto</th>
+                <th className="px-3 py-3 font-medium">SKU</th>
+                <th className="px-3 py-3 font-medium">Trackear stock</th>
+                <th className="px-3 py-3 font-medium">Cantidad disponible</th>
+                <th className="px-3 py-3 font-medium" />
+              </tr>
+            </thead>
+            <tbody>
+              {rows.map((row) => (
+                <tr key={row.productId} className="border-b last:border-0">
+                  <td className="px-6 py-3">
+                    <Checkbox
+                      checked={selected.has(row.productId)}
+                      onCheckedChange={(checked) => toggleSelected(row.productId, checked === true)}
+                    />
+                  </td>
+                  <td className="flex items-center gap-3 px-3 py-3">
+                    {row.thumbnail ? (
+                      <img src={row.thumbnail} alt="" className="size-8 rounded object-cover" />
+                    ) : (
+                      <div className="size-8 rounded bg-ui-bg-subtle" />
+                    )}
+                    <Text>{row.title}</Text>
+                  </td>
+                  <td className="px-3 py-3">
+                    <Text className="text-ui-fg-subtle">{row.sku ?? "—"}</Text>
+                  </td>
+                  <td className="px-3 py-3">
+                    <Switch
+                      checked={row.managed}
+                      disabled={savingId === row.productId}
+                      onCheckedChange={(checked) => updateManaged(row, checked)}
+                    />
+                  </td>
+                  <td className="px-3 py-3">
+                    <Input
+                      type="number"
+                      min={0}
+                      defaultValue={row.quantity}
+                      disabled={!row.managed || savingId === row.productId}
+                      className="w-24"
+                      onBlur={(event) => {
+                        const value = Number(event.target.value);
+                        if (value !== row.quantity) updateQuantity(row, value);
+                      }}
+                    />
+                  </td>
+                  <td className="px-3 py-3">
+                    {row.managed && row.quantity <= LOW_STOCK_THRESHOLD && (
+                      <Badge color="red">Stock bajo</Badge>
+                    )}
+                  </td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        </div>
+      )}
+    </Container>
+  );
+};
+
+export const config = defineRouteConfig({
+  label: "Inventario",
+  icon: Buildings,
+});
+
+export default InventoryPanel;

workloads/commerce-backend/src/api/admin/inventory-panel/route.ts

@@ -0,0 +1,152 @@
+import type { MedusaRequest, MedusaResponse } from "@medusajs/framework";
+import { ContainerRegistrationKeys } from "@medusajs/framework/utils";
+import {
+  createInventoryItemsWorkflow,
+  updateInventoryLevelsWorkflow,
+  updateProductVariantsWorkflow,
+} from "@medusajs/medusa/core-flows";
+import { attachInventoryItemToVariantWorkflow } from "../../../workflows/attach-inventory-item-to-variant";
+
+// Panel simplificado de inventario (pensado para un usuario no tecnico,
+// no reemplaza la vista nativa de Medusa Admin -- ver ADR/memoria del
+// bug de Firefox Android, tema aparte). Un producto = una variante en
+// este catalogo real (confirmado en vivo contra /store/products antes
+// de asumirlo), asi que la tabla trabaja a nivel de producto.
+
+const PRODUCT_FIELDS = [
+  "id",
+  "title",
+  "thumbnail",
+  "status",
+  "variants.id",
+  "variants.sku",
+  "variants.manage_inventory",
+  "variants.inventory_items.inventory_item_id",
+  "variants.inventory_items.inventory.location_levels.id",
+  "variants.inventory_items.inventory.location_levels.location_id",
+  "variants.inventory_items.inventory.location_levels.stocked_quantity",
+];
+
+async function defaultLocationId(req: MedusaRequest): Promise<string | null> {
+  const query = req.scope.resolve(ContainerRegistrationKeys.QUERY);
+  const { data: locations = [] } = await query.graph({
+    entity: "stock_location",
+    fields: ["id"],
+  });
+  return locations[0]?.id ?? null;
+}
+
+export async function GET(req: MedusaRequest, res: MedusaResponse) {
+  const query = req.scope.resolve(ContainerRegistrationKeys.QUERY);
+  const locationId = await defaultLocationId(req);
+
+  const { data: products = [] } = await query.graph({
+    entity: "product",
+    fields: PRODUCT_FIELDS,
+  });
+
+  const rows = products.map((product) => {
+    const variant = product.variants?.[0];
+    const inventoryItem = variant?.inventory_items?.[0];
+    const level = inventoryItem?.inventory?.location_levels?.find(
+      (level: { location_id: string }) => level.location_id === locationId,
+    );
+    return {
+      productId: product.id,
+      variantId: variant?.id ?? null,
+      title: product.title,
+      thumbnail: product.thumbnail,
+      status: product.status,
+      sku: variant?.sku ?? null,
+      managed: variant?.manage_inventory ?? false,
+      quantity: level?.stocked_quantity ?? 0,
+    };
+  });
+
+  res.json({ rows, locationId });
+}
+
+type PanelUpdateBody = {
+  productId: string;
+  variantId: string;
+  managed?: boolean;
+  quantity?: number;
+};
+
+export async function POST(req: MedusaRequest<PanelUpdateBody>, res: MedusaResponse) {
+  const { productId, variantId, managed, quantity } = req.body;
+  if (!productId || !variantId) {
+    res.status(400).json({ error: "productId y variantId son obligatorios" });
+    return;
+  }
+
+  const query = req.scope.resolve(ContainerRegistrationKeys.QUERY);
+  const locationId = await defaultLocationId(req);
+  if (!locationId) {
+    res.status(400).json({ error: "No hay una bodega (stock location) configurada" });
+    return;
+  }
+
+  const { data: products = [] } = await query.graph({
+    entity: "product",
+    fields: PRODUCT_FIELDS,
+    filters: { id: productId },
+  });
+  const variant = products[0]?.variants?.find((v: { id: string }) => v.id === variantId);
+  const inventoryItem = variant?.inventory_items?.[0];
+  let inventoryItemId: string | undefined = inventoryItem?.inventory_item_id;
+
+  if (managed === true && !inventoryItemId) {
+    // Primera vez que se activa el seguimiento para esta variante -- no
+    // trae InventoryItem todavia (confirmado en vivo: togglear
+    // manage_inventory=true en una variante existente NO crea uno solo,
+    // a diferencia de crear un producto nuevo con manage_inventory
+    // desde el inicio). Se crea con el nivel de stock inicial y se
+    // vincula aparte.
+    const { result: items } = await createInventoryItemsWorkflow(req.scope).run({
+      input: {
+        items: [
+          {
+            title: variant?.sku ? undefined : products[0]?.title,
+            sku: variant?.sku ?? undefined,
+            location_levels: [{ location_id: locationId, stocked_quantity: quantity ?? 0 }],
+          },
+        ],
+      },
+    });
+    inventoryItemId = items[0]?.id;
+    if (inventoryItemId) {
+      await attachInventoryItemToVariantWorkflow(req.scope).run({
+        input: { inventoryItemId, variantId },
+      });
+    }
+    await updateProductVariantsWorkflow(req.scope).run({
+      input: { product_variants: [{ id: variantId, manage_inventory: true }] },
+    });
+  } else {
+    if (typeof managed === "boolean") {
+      await updateProductVariantsWorkflow(req.scope).run({
+        input: { product_variants: [{ id: variantId, manage_inventory: managed }] },
+      });
+    }
+    if (typeof quantity === "number" && inventoryItemId) {
+      const level = inventoryItem?.inventory?.location_levels?.find(
+        (level: { location_id: string }) => level.location_id === locationId,
+      );
+      await updateInventoryLevelsWorkflow(req.scope).run({
+        input: {
+          updates: [
+            {
+              id: level?.id,
+              inventory_item_id: inventoryItemId,
+              location_id: locationId,
+              stocked_quantity: quantity,
+            },
+          ],
+        },
+      });
+    }
+  }
+
+  res.json({ ok: true });
+}

workloads/commerce-backend/src/workflows/attach-inventory-item-to-variant.ts

@@ -0,0 +1,21 @@
+import { createWorkflow, WorkflowResponse } from "@medusajs/framework/workflows-sdk";
+import { attachInventoryItemToVariants } from "@medusajs/medusa/core-flows";
+
+// attachInventoryItemToVariants es un step suelto (no un workflow
+// exportado) -- confirmado leyendo el .js real instalado
+// (@medusajs/core-flows/dist/inventory/steps/attach-inventory-items.js):
+// internamente resuelve ContainerRegistrationKeys.LINK y crea el link
+// Product<->Inventory. El campo "tag" del input es el variant_id (nombre
+// generico del step, no documentado con ese detalle).
+type Input = { inventoryItemId: string; variantId: string };
+
+export const attachInventoryItemToVariantWorkflow = createWorkflow(
+  "attach-inventory-item-to-variant",
+  (input: Input) => {
+    return new WorkflowResponse(
+      attachInventoryItemToVariants([
+        { inventoryItemId: input.inventoryItemId, tag: input.variantId },
+      ]),
+    );
+  },
+);

workloads/ecommerce/app/api/customer/google/callback/route.ts

@@ -0,0 +1,14 @@
+import { handleGoogleCallback } from "@/lib/headless/providers/medusa-customer";
+
+export async function POST(request: Request) {
+  const { code, state } = await request.json();
+  if (!code || !state) {
+    return Response.json({ error: "Faltan parámetros de Google" }, { status: 400 });
+  }
+  try {
+    const customer = await handleGoogleCallback(code, state);
+    return Response.json(customer);
+  } catch (error) {
+    return Response.json({ error: (error as Error).message }, { status: 400 });
+  }
+}

workloads/ecommerce/app/api/customer/google/start/route.ts

@@ -0,0 +1,14 @@
+import { getGoogleAuthUrl } from "@/lib/headless/providers/medusa-customer";
+
+// Navegacion de pagina completa (no fetch/XHR) -- el boton "Continuar
+// con Google" enlaza directo aca, el browser sigue el 302 hasta la
+// pantalla real de consentimiento de Google.
+export async function GET(request: Request) {
+  try {
+    const location = await getGoogleAuthUrl();
+    return Response.redirect(location);
+  } catch (error) {
+    const message = encodeURIComponent((error as Error).message);
+    return Response.redirect(new URL(`/?googleAuthError=${message}`, request.url));
+  }
+}

workloads/ecommerce/app/auth/google/callback/page.tsx

@@ -0,0 +1,10 @@
+import { Suspense } from "react";
+import { GoogleCallbackClient } from "@/components/account/google-callback-client";
+
+export default function GoogleCallbackPage() {
+  return (
+    <Suspense>
+      <GoogleCallbackClient />
+    </Suspense>
+  );
+}

workloads/ecommerce/commerce/medusa/patches/deployment.yaml

@@ -65,7 +65,7 @@ spec:
               memory: 64Mi
 
         - name: migrations
-          image: gitea.cruzcloud.net/devops/ecommerce-medusa:v1.0.168
+          image: gitea.cruzcloud.net/devops/ecommerce-medusa:v1.0.215
           imagePullPolicy: IfNotPresent
           command:
             - node
@@ -86,7 +86,7 @@ spec:
 
       containers:
         - name: app
-          image: gitea.cruzcloud.net/devops/ecommerce-medusa:v1.0.168
+          image: gitea.cruzcloud.net/devops/ecommerce-medusa:v1.0.215
           imagePullPolicy: IfNotPresent
           envFrom:
             - configMapRef:

workloads/ecommerce/components/account/account-dialog.tsx

@@ -10,6 +10,17 @@ import { useCustomerStore } from "@/store/customer-store";
 
 type Mode = "login" | "register";
 
+function GoogleIcon() {
+  return (
+    <svg viewBox="0 0 48 48" className="size-4" aria-hidden="true">
+      <path fill="#FFC107" d="M43.6 20.5H42V20H24v8h11.3c-1.6 4.7-6.1 8-11.3 8-6.6 0-12-5.4-12-12s5.4-12 12-12c3.1 0 5.8 1.1 8 3l6-6C34 5.1 29.3 3 24 3 12.4 3 3 12.4 3 24s9.4 21 21 21 21-9.4 21-21c0-1.4-.1-2.7-.4-3.5z" />
+      <path fill="#FF3D00" d="M6.3 14.7l6.6 4.8C14.6 15.9 18.9 13 24 13c3.1 0 5.8 1.1 8 3l6-6C34 5.1 29.3 3 24 3 16.1 3 9.3 7.6 6.3 14.7z" />
+      <path fill="#4CAF50" d="M24 45c5.2 0 9.9-2 13.4-5.2l-6.2-5.2c-2 1.5-4.6 2.4-7.2 2.4-5.2 0-9.6-3.3-11.3-8l-6.5 5C9.2 40.3 16 45 24 45z" />
+      <path fill="#1976D2" d="M43.6 20.5H42V20H24v8h11.3c-.8 2.3-2.2 4.3-4.1 5.6l6.2 5.2C41.4 35.9 45 30.5 45 24c0-1.4-.1-2.7-.4-3.5z" />
+    </svg>
+  );
+}
+
 export function AccountDialog({ open, onOpenChange }: { open: boolean; onOpenChange: (open: boolean) => void }) {
   const { customer, hasHydrated, loading, error, login, register, logout } = useCustomerStore();
   const [mode, setMode] = useState<Mode>("login");
@@ -57,6 +68,14 @@ export function AccountDialog({ open, onOpenChange }: { open: boolean; onOpenCha
                   {loading ? "Un momento…" : mode === "login" ? "Iniciar sesión" : "Crear cuenta"}
                 </Button>
               </form>
+              <div className="mt-3 flex items-center gap-3 text-xs font-bold uppercase tracking-wide text-slate-400">
+                <span className="h-px flex-1 bg-slate-100" />o<span className="h-px flex-1 bg-slate-100" />
+              </div>
+              <Button asChild variant="outline" size="lg" className="mt-3 w-full">
+                <a href="/api/customer/google/start">
+                  <GoogleIcon />Continuar con Google
+                </a>
+              </Button>
               <button
                 type="button"
                 className="mt-3 text-sm font-bold text-ari-marino hover:underline"

workloads/ecommerce/components/account/google-callback-client.tsx

@@ -0,0 +1,44 @@
+"use client";
+
+import { useRouter, useSearchParams } from "next/navigation";
+import { useEffect, useRef, useState } from "react";
+import { useCustomerStore } from "@/store/customer-store";
+
+export function GoogleCallbackClient() {
+  const router = useRouter();
+  const searchParams = useSearchParams();
+  const loginWithGoogle = useCustomerStore((state) => state.loginWithGoogle);
+  const [error, setError] = useState<string | null>(null);
+  const ran = useRef(false);
+
+  useEffect(() => {
+    // Guard contra el doble-mount de StrictMode -- el code de Google es
+    // de un solo uso, un segundo intento con el mismo code fallaria.
+    if (ran.current) return;
+    ran.current = true;
+
+    const code = searchParams.get("code");
+    const state = searchParams.get("state");
+    if (!code || !state) {
+      setError("Faltan parámetros de Google en la URL de retorno.");
+      return;
+    }
+
+    loginWithGoogle(code, state).then((ok) => {
+      router.replace(ok ? "/" : "/?googleAuthError=1");
+    });
+  }, [searchParams, loginWithGoogle, router]);
+
+  return (
+    <div className="flex min-h-[60vh] flex-col items-center justify-center gap-3 text-center">
+      {error ? (
+        <>
+          <p className="text-lg font-black text-rose-600">No se pudo iniciar sesión con Google</p>
+          <p className="text-sm text-slate-600">{error}</p>
+        </>
+      ) : (
+        <p className="text-sm font-bold text-slate-600">Conectando con Google…</p>
+      )}
+    </div>
+  );
+}

workloads/ecommerce/lib/headless/providers/medusa-customer.ts

@@ -87,6 +87,56 @@ export async function loginCustomer(email: string, password: string): Promise<Cu
   return getCurrentCustomer(data.token as string);
 }
 
+// Flujo Google verificado en vivo (2026-08-29) contra el pod real, no
+// solo contra la doc: GET /auth/customer/google funciona igual que el
+// POST documentado (sin body, no hace falta callback_url -- ya viene de
+// GOOGLE_CALLBACK_URL en el modulo); la respuesta no trae Set-Cookie, o
+// sea que el "state" que Google reenvia en el callback es autocontenido
+// (firmado), no depende de sesion de servidor -- confirmado con un
+// callback con code/state inventados: 401 "No state provided, or
+// session expired" (mismo mensaje que con state ausente, no un error de
+// sesion real). auth/token/refresh confirmado que exige Bearer valido
+// (401 "Unauthorized" con uno invalido, no 404).
+function decodeJwtPayload(token: string): Record<string, unknown> {
+  const payload = token.split(".")[1] ?? "";
+  const base64 = payload.replace(/-/g, "+").replace(/_/g, "/");
+  const json = Buffer.from(base64, "base64").toString("utf-8");
+  return JSON.parse(json || "{}");
+}
+
+export async function getGoogleAuthUrl(): Promise<string> {
+  const data = await medusaAuthFetch("/auth/customer/google");
+  return data.location as string;
+}
+
+export async function handleGoogleCallback(code: string, state: string): Promise<CustomerSummary> {
+  const query = new URLSearchParams({ code, state }).toString();
+  const data = await medusaAuthFetch(`/auth/customer/google/callback?${query}`, { method: "POST" });
+  const initialToken = data.token as string;
+  const payload = decodeJwtPayload(initialToken);
+  const actorId = payload.actor_id as string | undefined;
+
+  if (!actorId) {
+    // Primer login con Google -- todavia no existe el customer real.
+    const userMetadata = (payload.user_metadata as Record<string, unknown> | undefined) ?? {};
+    const email = userMetadata.email as string;
+    const firstName = (userMetadata.given_name as string) ?? (userMetadata.name as string) ?? email.split("@")[0];
+    const lastName = (userMetadata.family_name as string) ?? "";
+    await medusaAuthFetch("/store/customers", {
+      method: "POST",
+      token: initialToken,
+      body: { email, first_name: firstName, last_name: lastName },
+    });
+  }
+
+  // El token del callback (o el de recien crear el customer) todavia no
+  // sirve como sesion final -- hay que refrescarlo, tanto para usuarios
+  // nuevos como para los que ya existian (confirmado contra la doc: los
+  // dos casos convergen en el mismo paso de refresh).
+  const refreshed = await medusaAuthFetch("/auth/token/refresh", { method: "POST", token: initialToken });
+  return getCurrentCustomer(refreshed.token as string);
+}
+
 export async function registerCustomer(
   email: string,
   password: string,

workloads/ecommerce/store/customer-store.ts

@@ -23,6 +23,7 @@ interface CustomerState {
   setHasHydrated: (value: boolean) => void;
   register: (email: string, password: string, firstName: string, lastName: string) => Promise<boolean>;
   login: (email: string, password: string) => Promise<boolean>;
+  loginWithGoogle: (code: string, state: string) => Promise<boolean>;
   logout: () => void;
   syncCustomer: () => Promise<void>;
 }
@@ -77,6 +78,17 @@ export const useCustomerStore = create<CustomerState>()(
         return true;
       },
 
+      loginWithGoogle: async (code, state) => {
+        set({ loading: true, error: null });
+        const result = await postJson("/api/customer/google/callback", { code, state });
+        if (result.error) {
+          set({ loading: false, error: result.error });
+          return false;
+        }
+        set({ loading: false, token: result.token, customer: toCustomer(result) });
+        return true;
+      },
+
       logout: () => set({ token: null, customer: null, error: null }),
 
       // El token guardado en localStorage puede llevar dias o haber sido