Feature: Localization Restructuring to follow a stricter pattern

src/Localization/Services/LanguageCache.php

@@ -8,7 +8,7 @@ use Lunar\Models\Language;
 
 /**
  * Cached read layer over Lunar's `languages` table — the single source both
- * Modules\Core\Localization\LocaleMiddleware (request-time locale resolution) and
+ * Modules\Core\Localization\Middleware\LocaleMiddleware (request-time locale resolution) and
  * any other locale-aware code (e.g. Modules\Core\Product\Services\ProductService) read
  * from, so the language list is fetched once per cache lifetime rather than once
  * per caller. Cached forever, invalidated via forget() by

src/Localization/Services/TranslationReader.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Modules\Core\Localization\Services;
+
+use Illuminate\Support\Facades\App;
+use Spatie\TranslationLoader\LanguageLine;
+
+class TranslationReader
+{
+    private const DEFAULT_GROUP = 'storefront';
+
+    /**
+     * All labels in a group for the given (or current) locale, keyed by their
+     * dot-notation key — e.g. ['nav.cart' => 'Cart', 'nav.home' => 'Home'].
+     * Backed by LanguageLine's own forever-cache, so this is a cache hit after
+     * the first call for a given group+locale.
+     */
+    public function group(string $group = self::DEFAULT_GROUP, ?string $locale = null): array
+    {
+        return LanguageLine::getTranslationsForGroup($locale ?? App::getLocale(), $group);
+    }
+}

src/Localization/Services/TranslationService.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace Modules\Core\Localization\Services;
+
+use Illuminate\Support\Facades\Event;
+use Modules\Core\Localization\Events\TranslationCreated;
+use Modules\Core\Localization\Events\TranslationDeleted;
+use Modules\Core\Localization\Events\TranslationUpdated;
+use Spatie\TranslationLoader\LanguageLine;
+
+class TranslationService
+{
+    public function create(string $group, string $key, array $text): LanguageLine
+    {
+        $languageLine = LanguageLine::create([
+            'group' => $group,
+            'key' => $key,
+            'text' => $text,
+        ]);
+
+        Event::dispatch(new TranslationCreated($languageLine));
+
+        return $languageLine;
+    }
+
+    public function update(LanguageLine $languageLine, string $group, string $key, array $text): LanguageLine
+    {
+        // Callers (e.g. Filament's EditRecord) may hand us a model instance
+        // already filled with the new form values in memory — refresh from the
+        // database first so $old reflects what's actually persisted, not what's
+        // about to be written.
+        $persisted = $languageLine->fresh();
+
+        $old = [
+            'group' => $persisted->group,
+            'key' => $persisted->key,
+            'text' => $persisted->text,
+        ];
+
+        $languageLine->update([
+            'group' => $group,
+            'key' => $key,
+            'text' => $text,
+        ]);
+
+        Event::dispatch(new TranslationUpdated($languageLine, $old));
+
+        return $languageLine;
+    }
+
+    public function delete(LanguageLine $languageLine): void
+    {
+        $languageLine->delete();
+
+        Event::dispatch(new TranslationDeleted($languageLine));
+    }
+}