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

src/Cart/Events/CartCleared.php

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+<?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

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+<?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

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+<?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

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+<?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

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+<?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

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+<?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

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+<?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

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+<?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,
+    ) {}
+}