Feature: Creating Cart Service, Cart Events, Save For Later functionality, Adding Filament Views for viewing abandoned carts

src/Cart/Commands/DetectAbandonedCarts.php

@@ -0,0 +1,84 @@
+<?php
+
+namespace Modules\Core\Cart\Commands;
+
+use Illuminate\Console\Command;
+use Illuminate\Support\Facades\Event;
+use Lunar\Models\Cart;
+use Modules\Core\Cart\Filament\Resources\CartResource;
+use Modules\Core\Recovery\Events\CartAbandoned;
+use Modules\Core\Recovery\Events\CheckoutAbandoned;
+
+/**
+ * "Abandoned" is a derived state (Cart::updated_at older than
+ * config('core.cart.abandoned_after')) — nothing transitions a cart into it
+ * via a normal Eloquent write, so there's no model-event hook to dispatch
+ * CartAbandoned/CheckoutAbandoned from directly. This command is the only
+ * place that moment gets detected; run it on a schedule (see docs/cart.md).
+ *
+ * Splits Cart::scopeActive()'s two branches into their own events —
+ * see CartAbandoned/CheckoutAbandoned's docblocks for why they're distinct,
+ * not one combined "abandoned" state: a cart with no order at all is a much
+ * weaker purchase-intent signal than one with a draft order that was never
+ * placed.
+ *
+ * Deliberately does NOT write anything to Cart/Order — dispatch only. An
+ * earlier version recorded an "already notified" marker on Cart::meta/
+ * Order::meta, but that write bumped updated_at as an Eloquent side effect,
+ * which un-staled the very cart being marked abandoned (the same field
+ * abandonment staleness is computed from) — see docs/cart.md's former
+ * "Known bug" note. Cart/Checkout must have no way of writing abandonment
+ * state at all; every cart still matching the query below refires its event
+ * on every run until Recovery (not yet built — see
+ * docs/recovery-strategies.md) owns its own dedup/tracking table.
+ */
+class DetectAbandonedCarts extends Command
+{
+    protected $signature = 'boboko:cart:detect-abandoned';
+
+    protected $description = 'Dispatch CartAbandoned/CheckoutAbandoned for carts that just crossed the abandonment threshold.';
+
+    public function handle(): void
+    {
+        $cutoff = CartResource::abandonedCutoff();
+
+        $cartsAbandoned = 0;
+        $checkoutsAbandoned = 0;
+
+        Cart::query()
+            ->whereDoesntHave('orders')
+            ->where('updated_at', '<=', $cutoff)
+            ->with('lines')
+            ->chunkById(200, function ($carts) use (&$cartsAbandoned) {
+                foreach ($carts as $cart) {
+                    if ($cart->lines->isEmpty()) {
+                        continue;
+                    }
+
+                    Event::dispatch(new CartAbandoned($cart));
+
+                    $cartsAbandoned++;
+                }
+            });
+
+        Cart::query()
+            ->whereHas('orders', fn ($query) => $query->whereNull('placed_at'))
+            ->where('updated_at', '<=', $cutoff)
+            ->with(['orders' => fn ($query) => $query->whereNull('placed_at')])
+            ->chunkById(200, function ($carts) use (&$checkoutsAbandoned) {
+                foreach ($carts as $cart) {
+                    $order = $cart->orders->first();
+
+                    if ($order === null) {
+                        continue;
+                    }
+
+                    Event::dispatch(new CheckoutAbandoned($cart, $order));
+
+                    $checkoutsAbandoned++;
+                }
+            });
+
+        $this->components->info("Dispatched CartAbandoned for {$cartsAbandoned} cart(s), CheckoutAbandoned for {$checkoutsAbandoned} checkout(s).");
+    }
+}

src/Cart/Events/CartCleared.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Modules\Core\Cart\Events;
+
+use Lunar\Models\Cart;
+
+class CartCleared
+{
+    /**
+     * @param  array<int, array{id: int, purchasable_type: string, purchasable_id: int, quantity: int, meta: array}>  $lines
+     *   Snapshot of every line that was in the cart before clearing — Cart::clear()
+     *   deletes all rows directly, so nothing here can be fresh CartLine instances.
+     */
+    public function __construct(
+        public readonly Cart $cart,
+        public readonly array $lines,
+    ) {}
+}

src/Cart/Events/CartCouponApplied.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Modules\Core\Cart\Events;
+
+use Lunar\Models\Cart;
+
+class CartCouponApplied
+{
+    public function __construct(
+        public readonly Cart $cart,
+        public readonly string $code,
+    ) {}
+}

src/Cart/Events/CartCouponRemoved.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Modules\Core\Cart\Events;
+
+use Lunar\Models\Cart;
+
+class CartCouponRemoved
+{
+    public function __construct(
+        public readonly Cart $cart,
+        public readonly string $code,
+    ) {}
+}

src/Cart/Events/CartLineAdded.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Modules\Core\Cart\Events;
+
+use Lunar\Models\Cart;
+use Lunar\Models\CartLine;
+
+class CartLineAdded
+{
+    public function __construct(
+        public readonly Cart $cart,
+        public readonly CartLine $line,
+    ) {}
+}

src/Cart/Events/CartLineMovedToCart.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Modules\Core\Cart\Events;
+
+use Lunar\Models\Cart;
+use Lunar\Models\CartLine;
+
+/**
+ * The reverse of CartLineSaved — a previously saved-for-later line moved back
+ * into the purchasable cart (now counted in totals again).
+ */
+class CartLineMovedToCart
+{
+    public function __construct(
+        public readonly Cart $cart,
+        public readonly CartLine $line,
+    ) {}
+}

src/Cart/Events/CartLineRemoved.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Modules\Core\Cart\Events;
+
+use Lunar\Models\Cart;
+
+class CartLineRemoved
+{
+    /**
+     * @param  array{id: int, purchasable_type: string, purchasable_id: int, quantity: int, meta: array}  $line
+     *   Snapshot of the removed line — the row is already deleted by the time this
+     *   event dispatches, so nothing here can be a fresh CartLine model instance.
+     */
+    public function __construct(
+        public readonly Cart $cart,
+        public readonly array $line,
+    ) {}
+}

src/Cart/Events/CartLineSaved.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Modules\Core\Cart\Events;
+
+use Lunar\Models\Cart;
+use Lunar\Models\CartLine;
+
+/**
+ * A line was moved OUT of the purchasable cart and into "saved for later" —
+ * not a removal (the row still exists), but distinct from CartLineUpdated
+ * since it's a state transition worth its own hook (e.g. abandoned-cart
+ * recovery treating a saved line very differently from a deleted one).
+ */
+class CartLineSaved
+{
+    public function __construct(
+        public readonly Cart $cart,
+        public readonly CartLine $line,
+    ) {}
+}

src/Cart/Events/CartLineUpdated.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Modules\Core\Cart\Events;
+
+use Lunar\Models\Cart;
+use Lunar\Models\CartLine;
+
+class CartLineUpdated
+{
+    /**
+     * @param  array{quantity: int, meta: array}  $old  Snapshot before the update.
+     */
+    public function __construct(
+        public readonly Cart $cart,
+        public readonly CartLine $line,
+        public readonly array $old,
+    ) {}
+}

src/Cart/Exceptions/InvalidCouponException.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Modules\Core\Cart\Exceptions;
+
+use RuntimeException;
+
+/**
+ * Thrown by CartService::applyCoupon() when the given code doesn't match any
+ * currently-active, non-exhausted Discount — Lunar's own
+ * Discounts::validateCoupon() only returns a bool, it has no matching
+ * exception type of its own to reuse here.
+ */
+class InvalidCouponException extends RuntimeException
+{
+    public function __construct(public readonly string $code)
+    {
+        parent::__construct("The coupon code \"{$code}\" is not valid.");
+    }
+}

src/Cart/Filament/Resources/CartResource.php

@@ -39,11 +39,13 @@ class CartResource extends Resource
     }
 
     /**
-     * Count only, not a fetch — no rows are loaded. Scoped to genuinely abandoned
-     * carts specifically (mirrors ListCarts::getTabs()'s "Abandoned" query, not
-     * "Ongoing"), since that's the number a staff member glancing at the sidebar
-     * actually wants: how many carts might need following up on, not the total
-     * including ones someone is actively shopping in right now.
+     * Count only, not a fetch — no rows are loaded. Combines BOTH abandoned
+     * states (`active()` already covers "no order at all" and "draft order,
+     * never placed" together — see ListCarts::getTabs()'s "Abandoned Cart" /
+     * "Abandoned Checkout" tabs for where they're split apart), not "Ongoing"
+     * — the badge is meant to answer "how many carts might need following up
+     * on," not the total including ones someone is actively shopping in right
+     * now.
      */
     public static function getNavigationBadge(): ?string
     {

src/Cart/Filament/Resources/CartResource/Pages/ListCarts.php

@@ -17,19 +17,34 @@ class ListCarts extends ListRecords
      * "Completed" instead means the cart has an order with `placed_at` set (a
      * placed, not just drafted, order).
      *
-     * "Ongoing" vs "Abandoned" both start from `Cart::scopeActive()` (not yet
-     * converted to an order) and split on `updated_at` against
-     * `CartResource::abandonedCutoff()` — Lunar has no time-based staleness signal
-     * of its own, so recent activity is the only thing distinguishing a cart
-     * someone is shopping in right now from one genuinely left behind.
+     * `Cart::scopeActive()` (not yet converted to an order) actually mixes two
+     * distinct states: no order started at all, vs. a draft order exists
+     * (`placed_at IS NULL`) but was never placed — checkout was started, not
+     * finished. That's a real difference in purchase intent (a cart with a
+     * draft order is a much stronger signal than one with no order at all) and
+     * in reachability (checkout usually captures an email even for a guest),
+     * so they get separate tabs rather than one combined "no order yet"
+     * bucket — same distinction Modules\Core\Recovery\Events\CartAbandoned /
+     * Modules\Core\Recovery\Events\CheckoutAbandoned draw.
+     *
+     * "Ongoing" vs the two abandoned tabs all split on `updated_at` against
+     * `CartResource::abandonedCutoff()` — Lunar has no time-based staleness
+     * signal of its own, so recent activity is the only thing distinguishing a
+     * cart someone is shopping in right now from one genuinely left behind.
      */
     public function getTabs(): array
     {
         return [
             'ongoing' => Tab::make('Ongoing')
                 ->modifyQueryUsing(fn (Builder $query) => $query->active()->where('updated_at', '>', CartResource::abandonedCutoff())),
-            'abandoned' => Tab::make('Abandoned')
-                ->modifyQueryUsing(fn (Builder $query) => $query->active()->where('updated_at', '<=', CartResource::abandonedCutoff())),
+            'abandoned_cart' => Tab::make('Abandoned Cart')
+                ->modifyQueryUsing(fn (Builder $query) => $query
+                    ->whereDoesntHave('orders')
+                    ->where('updated_at', '<=', CartResource::abandonedCutoff())),
+            'abandoned_checkout' => Tab::make('Abandoned Checkout')
+                ->modifyQueryUsing(fn (Builder $query) => $query
+                    ->whereHas('orders', fn (Builder $query) => $query->whereNull('placed_at'))
+                    ->where('updated_at', '<=', CartResource::abandonedCutoff())),
             'completed' => Tab::make('Completed')
                 ->modifyQueryUsing(fn (Builder $query) => $query->whereHas(
                     'orders',

src/Cart/Pipelines/ZeroSavedForLaterPrice.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Modules\Core\Cart\Pipelines;
+
+use Closure;
+use Lunar\DataTypes\Price;
+use Lunar\Models\Contracts\CartLine as CartLineContract;
+
+/**
+ * Runs in config('lunar.cart.pipelines.cart_lines'), after GetUnitPrice —
+ * zeroes out unitPrice/unitPriceInclTax for any line flagged
+ * meta.saved_for_later, BEFORE Lunar's own CalculateLines pipeline step reads
+ * unitPrice to compute subTotal/total. A saved-for-later item is deliberately
+ * parked, not pending purchase, so it shouldn't inflate Cart::total — and
+ * since CalculateLines sums every CartLine unconditionally with no meta-based
+ * exclusion of its own, zeroing the price here (rather than patching subTotal
+ * after the fact) is what makes every downstream total naturally correct
+ * without a second pass.
+ */
+class ZeroSavedForLaterPrice
+{
+    public function handle(CartLineContract $cartLine, Closure $next): mixed
+    {
+        if ($cartLine->meta['saved_for_later'] ?? false) {
+            $currency = $cartLine->cart->currency;
+
+            $cartLine->unitPrice = new Price(0, $currency, 1);
+            $cartLine->unitPriceInclTax = new Price(0, $currency, 1);
+        }
+
+        return $next($cartLine);
+    }
+}

src/Cart/Services/CartService.php

@@ -0,0 +1,250 @@
+<?php
+
+namespace Modules\Core\Cart\Services;
+
+use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\Event;
+use Lunar\Actions\Carts\GetExistingCartLine;
+use Lunar\Base\Purchasable;
+use Lunar\Facades\CartSession;
+use Lunar\Facades\Discounts;
+use Lunar\Models\Cart;
+use Lunar\Models\CartLine;
+use Modules\Core\Cart\Events\CartCleared;
+use Modules\Core\Cart\Events\CartCouponApplied;
+use Modules\Core\Cart\Events\CartCouponRemoved;
+use Modules\Core\Cart\Events\CartLineAdded;
+use Modules\Core\Cart\Events\CartLineMovedToCart;
+use Modules\Core\Cart\Events\CartLineRemoved;
+use Modules\Core\Cart\Events\CartLineSaved;
+use Modules\Core\Cart\Events\CartLineUpdated;
+use Modules\Core\Cart\Exceptions\InvalidCouponException;
+
+/**
+ * Storefront-facing cart operations, mirroring Modules\Core\Catalog\Services\
+ * ProductService/CollectionService's shape — one boboko-owned API a storefront
+ * calls, so Lunar's own CartSession/Cart stay an implementation detail rather
+ * than something a consuming app depends on directly.
+ *
+ * Every mutating method dispatches a matching domain event
+ * (Modules\Core\Cart\Events\*) after the underlying Lunar operation completes —
+ * Lunar itself dispatches zero cart events (see docs/lunar.md's Cart gotchas),
+ * so without this, nothing in a consuming app has anything to react to when a
+ * cart actually changes (reindexing, notifications, analytics, etc.).
+ *
+ * All mutating methods return the recalculated Cart — matching Lunar's own
+ * Cart::add()/updateLine()/etc., which already return $this after
+ * refresh()->recalculate() — so a caller gets fresh totals in the same call,
+ * no second fetch needed.
+ */
+class CartService
+{
+    /**
+     * The current session's cart, or null if none exists yet. Does NOT
+     * auto-create one — see currentOrCreate() for that.
+     */
+    public function current(): ?Cart
+    {
+        return CartSession::current();
+    }
+
+    /**
+     * The current session's cart, creating one if none exists yet — the right
+     * call for "add to cart" style flows where a cart must exist by the time
+     * the method returns.
+     */
+    public function currentOrCreate(): Cart
+    {
+        return CartSession::manager();
+    }
+
+    public function addLine(Purchasable $purchasable, int $quantity = 1, array $meta = []): Cart
+    {
+        $cart = $this->currentOrCreate()->add($purchasable, $quantity, $meta);
+
+        $line = app(config('lunar.cart.actions.get_existing_cart_line', GetExistingCartLine::class))
+            ->execute($cart, $purchasable, $meta);
+
+        if ($line !== null) {
+            Event::dispatch(new CartLineAdded($cart, $line));
+        }
+
+        return $cart;
+    }
+
+    public function updateLine(int $cartLineId, int $quantity, ?array $meta = null): Cart
+    {
+        $before = CartLine::findOrFail($cartLineId);
+        $old = ['quantity' => $before->quantity, 'meta' => $before->meta->toArray()];
+
+        $cart = $this->currentOrCreate()->updateLine($cartLineId, $quantity, $meta);
+
+        $line = $cart->lines->firstWhere('id', $cartLineId);
+
+        if ($line !== null) {
+            Event::dispatch(new CartLineUpdated($cart, $line, $old));
+        }
+
+        return $cart;
+    }
+
+    public function removeLine(int $cartLineId): Cart
+    {
+        $line = CartLine::findOrFail($cartLineId);
+        $snapshot = $this->snapshotLine($line);
+
+        $cart = $this->currentOrCreate()->remove($cartLineId);
+
+        Event::dispatch(new CartLineRemoved($cart, $snapshot));
+
+        return $cart;
+    }
+
+    public function clear(): Cart
+    {
+        $cart = $this->currentOrCreate();
+        $snapshots = $cart->lines->map($this->snapshotLine(...))->all();
+
+        $cart = $cart->clear();
+
+        Event::dispatch(new CartCleared($cart, $snapshots));
+
+        return $cart;
+    }
+
+    /**
+     * Sets the cart's coupon code, which the ApplyDiscounts pipeline step picks
+     * up on the next calculate() — there's no dedicated Lunar action for this
+     * (unlike add/update/remove, coupon_code is a plain cast attribute), so
+     * this is the closest thing to one for a consuming app to call.
+     *
+     * Validated via Discounts::validateCoupon() (does a matching, currently
+     * active, non-exhausted Discount exist?) before it's set — CouponString's
+     * cast only normalizes casing, it doesn't validate anything, so setting
+     * coupon_code directly would silently accept a bogus code and just not
+     * discount anything once calculated.
+     *
+     * @throws InvalidCouponException if the code doesn't match a valid, active,
+     *   non-exhausted Discount
+     */
+    public function applyCoupon(string $code): Cart
+    {
+        if (! Discounts::validateCoupon($code)) {
+            throw new InvalidCouponException($code);
+        }
+
+        $cart = $this->currentOrCreate();
+        $cart->coupon_code = $code;
+        $cart->save();
+        $cart = $cart->recalculate();
+
+        Event::dispatch(new CartCouponApplied($cart, $cart->coupon_code));
+
+        return $cart;
+    }
+
+    public function removeCoupon(): Cart
+    {
+        $cart = $this->currentOrCreate();
+        $code = $cart->coupon_code;
+
+        if ($code === null) {
+            return $cart;
+        }
+
+        $cart->coupon_code = null;
+        $cart->save();
+        $cart = $cart->recalculate();
+
+        Event::dispatch(new CartCouponRemoved($cart, $code));
+
+        return $cart;
+    }
+
+    /**
+     * Lines currently counted toward the cart's totals — everything except
+     * ones flagged meta.saved_for_later (see savedLines()). This is the set a
+     * cart page's main list / checkout would iterate, since a saved line
+     * isn't pending purchase.
+     *
+     * @return Collection<int, CartLine>
+     */
+    public function activeLines(?Cart $cart = null): Collection
+    {
+        $cart ??= $this->currentOrCreate();
+
+        return $cart->lines->reject(fn (CartLine $line) => $line->meta['saved_for_later'] ?? false)->values();
+    }
+
+    /**
+     * Lines a shopper has deliberately parked rather than deleted — excluded
+     * from Cart totals (see Modules\Core\Cart\Pipelines\ZeroSavedForLaterPrice)
+     * and from activeLines(). A cart page's "Saved for later" section iterates
+     * this set.
+     *
+     * @return Collection<int, CartLine>
+     */
+    public function savedLines(?Cart $cart = null): Collection
+    {
+        $cart ??= $this->currentOrCreate();
+
+        return $cart->lines->filter(fn (CartLine $line) => $line->meta['saved_for_later'] ?? false)->values();
+    }
+
+    /**
+     * Moves a line OUT of the purchasable cart without deleting it — it stays
+     * on the cart (still visible, still re-addable) but is excluded from
+     * totals via meta.saved_for_later, zeroed by ZeroSavedForLaterPrice before
+     * Lunar's own CalculateLines sums the cart (which has no meta-based
+     * exclusion of its own).
+     */
+    public function saveForLater(int $cartLineId): Cart
+    {
+        $line = CartLine::findOrFail($cartLineId);
+        $meta = [...$line->meta->toArray(), 'saved_for_later' => true];
+
+        $cart = $this->currentOrCreate()->updateLine($cartLineId, $line->quantity, $meta);
+
+        $line = $cart->lines->firstWhere('id', $cartLineId);
+
+        if ($line !== null) {
+            Event::dispatch(new CartLineSaved($cart, $line));
+        }
+
+        return $cart;
+    }
+
+    /**
+     * The reverse of saveForLater() — moves a line back into the purchasable
+     * cart, counted in totals again.
+     */
+    public function moveToCart(int $cartLineId): Cart
+    {
+        $line = CartLine::findOrFail($cartLineId);
+        $meta = [...$line->meta->toArray(), 'saved_for_later' => false];
+
+        $cart = $this->currentOrCreate()->updateLine($cartLineId, $line->quantity, $meta);
+
+        $line = $cart->lines->firstWhere('id', $cartLineId);
+
+        if ($line !== null) {
+            Event::dispatch(new CartLineMovedToCart($cart, $line));
+        }
+
+        return $cart;
+    }
+
+    /**
+     * @return array{id: int, purchasable_type: string, purchasable_id: int, quantity: int, meta: array}
+     */
+    private function snapshotLine(CartLine $line): array
+    {
+        return [
+            'id' => $line->id,
+            'purchasable_type' => $line->purchasable_type,
+            'purchasable_id' => $line->purchasable_id,
+            'quantity' => $line->quantity,
+            'meta' => $line->meta->toArray(),
+        ];
+    }
+}

src/Providers/CartServiceProvider.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Modules\Core\Providers;
+
+use Illuminate\Console\Scheduling\Schedule;
+use Illuminate\Support\ServiceProvider;
+use Modules\Core\Cart\Commands\DetectAbandonedCarts;
+
+class CartServiceProvider extends ServiceProvider
+{
+    public function boot(): void
+    {
+        if ($this->app->runningInConsole()) {
+            $this->commands([DetectAbandonedCarts::class]);
+        }
+
+        $this->app->booted(function () {
+            $this->app->make(Schedule::class)
+                ->command(DetectAbandonedCarts::class)
+                ->hourly();
+        });
+    }
+}

src/Recovery/Events/CartAbandoned.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Modules\Core\Recovery\Events;
+
+use Lunar\Models\Cart;
+
+/**
+ * A cart has gone stale (no activity for config('core.cart.abandoned_after'))
+ * with NO order ever started — the shopper added items and never began
+ * checkout. Weak purchase-intent signal: usually a browsing/price-check
+ * action, not a near-purchase. Distinct from CheckoutAbandoned, which fires
+ * for a cart that DID reach checkout (a draft Order exists) but never placed
+ * it — a much stronger intent signal, and reachable via the email/address
+ * checkout itself usually captures even for a guest.
+ *
+ * Lives under Recovery, not Cart — abandonment detection/tracking is
+ * deliberately kept out of the Cart module entirely, including its event
+ * definitions, so Cart has no abandonment-related code at all. See
+ * docs/cart.md and docs/recovery-strategies.md.
+ *
+ * "Abandoned" is a derived state (stale updated_at), not something that
+ * transitions via a normal Eloquent write, so there's no natural model-event
+ * hook to dispatch this from directly — detection is Recovery's own concern
+ * (not yet built; design notes in docs/recovery-strategies.md).
+ */
+class CartAbandoned
+{
+    public function __construct(
+        public readonly Cart $cart,
+    ) {}
+}

src/Recovery/Events/CheckoutAbandoned.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Modules\Core\Recovery\Events;
+
+use Lunar\Models\Cart;
+use Lunar\Models\Order;
+
+/**
+ * A cart's checkout has gone stale (no activity for
+ * config('core.cart.abandoned_after')) with a draft Order already created
+ * (Order::isDraft() — placed_at IS NULL) but never placed. Strong
+ * purchase-intent signal — the shopper committed to checking out, something
+ * blocked completion. Distinct from CartAbandoned, which fires for a cart
+ * with no order at all (weak intent, usually unreachable). Checkout
+ * typically captures an email/address even for a guest, so this state is
+ * normally reachable regardless of login status.
+ *
+ * Lives under Recovery, not Checkout/Cart — abandonment detection/tracking
+ * is deliberately kept out of both modules entirely, including its event
+ * definitions. See docs/cart.md and docs/recovery-strategies.md.
+ *
+ * "Abandoned" is a derived state (stale updated_at, no placed_at), not
+ * something that transitions via a normal Eloquent write — detection is
+ * Recovery's own concern (not yet built; design notes in
+ * docs/recovery-strategies.md).
+ */
+class CheckoutAbandoned
+{
+    public function __construct(
+        public readonly Cart $cart,
+        public readonly Order $order,
+    ) {}
+}