Feat: Updating Product Service with new Methods, DTOs for ListingResult And Slider Bounds

docs/product-search.md

@@ -24,36 +24,62 @@ merges `$builder->options` directly into the search request).
 ## Usage
 
 ```php
+use Modules\Core\Catalog\DTOs\ProductFilters;
+use Modules\Core\Catalog\Enums\ProductSort;
 use Modules\Core\Catalog\Services\ProductSearchService;
 
 $results = app(ProductSearchService::class)->search('running shoes');
-// or an explicit locale, bypassing App::getLocale():
-$results = app(ProductSearchService::class)->search('running shoes', 'el');
+
+// Filters/sort apply the exact same semantics ProductService::list() uses for
+// collection browsing (same ProductFilterBuilder, same ProductSort) — a shopper
+// narrowing a text search by price/brand/stock gets identical filter behavior
+// to narrowing a category listing.
+$results = app(ProductSearchService::class)->search(
+    'running shoes',
+    filters: new ProductFilters(brand: 'Acme', minPrice: 20.0, inStockOnly: true),
+    sort: ProductSort::PriceAsc,
+);
 ```
 
 Returns an `Illuminate\Database\Eloquent\Collection` of `Lunar\Models\Product` — Scout's
 `->get()` hydrates real models from the database after the Meilisearch query, so relations
 (`variants`, `brand`, `media`, etc.) are available on the results as normal.
 
-`$locale` defaults to `App::getLocale()` — already set correctly on every storefront request by
-`Modules\Core\Localization\Middleware\LocaleMiddleware` (see `localization.md`), so callers in controllers
-don't need to pass it explicitly.
+There is no `$locale` parameter — see "Field list is dynamic, not hardcoded" below for why
+every configured store language is always searched, regardless of the current request locale.
 
 ---
 
-## Missing-translation fallback
+## Missing-translation fallback, in both directions
 
 If a product was only ever given an English name, `name_el` doesn't exist on that document at
 all (Lunar's indexer only writes a `{handle}_{locale}` field for locales actually present in the
 attribute's stored data — see `ScoutIndexer::mapSearchableAttributes()`). Searching strictly
-against `name_el` would make that product invisible to Greek-locale search, even though it's a
-real catalog item.
+against the current request's locale field would make that product invisible whenever a shopper's
+locale doesn't match the language it happens to be translated into.
 
-To avoid silently hiding incompletely-translated products, `ProductSearchService` targets **both**
-the resolved locale's fields **and** the default language's fields
-(`Lunar\Models\Language::getDefault()->code`) — e.g. searching in `el` targets `name_el`,
-`name_en`, `description_el`, `description_en` together (assuming `en` is the default language).
-A product missing an `el` translation still matches via its `en` fields.
+`ProductSearchService` avoids this by targeting **every configured store language's fields**
+(`Lunar\Models\Language::all()`) on every search, not just the current request locale plus the
+store default — e.g. with `el`/`en` configured, every search targets `name_el`, `name_en`,
+`description_el`, `description_en` together, regardless of which locale the shopper is browsing
+in. This is deliberately not scoped to "current locale + default locale": if the current locale
+already equals the default (a single-language store, or a shopper browsing in the default
+language), that pairing collapses to one locale and stops catching anything else — always
+searching every configured language avoids that gap in both directions, at the cost of a larger
+`attributesToSearchOn` list as the store's language count grows.
+
+---
+
+## Variant option values are searched too
+
+Alongside the locale-suffixed attribute fields, every search also targets
+`variants.options.value` directly — e.g. a variant named "Κάπτεν Γαμέρικα" on a "Name" option
+matches a search for that text, even though it never appears in the product's own name or
+description. This isn't one of Lunar's own attributes (`AttributeManifest` has no entry for it),
+so it can't be discovered the way `name`/`description` are — it's a structural field of
+`Modules\Core\Catalog\Services\ProductIndexer`'s own document shape (see `ProductIndexer::mapVariant()`),
+added here directly. Not locale-suffixed — each option value is stored as one already-resolved
+string per variant.
 
 ---