feat: theming

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

core/lib/Stores/TenantStore.php

@@ -72,4 +72,57 @@ class TenantStore
         $this->dataStore->selectCollection(self::COLLECTION_NAME)->deleteOne([ '_id' => $id]);
     }
 
+    // =========================================================================
+    // Settings Operations
+    // =========================================================================
+
+    /**
+     * Fetch settings for a tenant, optionally filtered to specific keys.
+     *
+     * @param string   $identifier Tenant identifier
+     * @param string[] $keys       Optional list of keys to return; empty = all
+     *
+     * @return array<string, mixed>
+     */
+    public function fetchSettings(string $identifier, array $keys = []): array
+    {
+        $entry = $this->dataStore->selectCollection(self::COLLECTION_NAME)->findOne(
+            ['identifier' => $identifier],
+            ['projection' => ['settings' => 1]]
+        );
+
+        $settings = (array)($entry['settings'] ?? []);
+
+        if (empty($keys)) {
+            return $settings;
+        }
+
+        $result = [];
+        foreach ($keys as $key) {
+            $result[$key] = $settings[$key] ?? null;
+        }
+        return $result;
+    }
+
+    /**
+     * Merge-update settings for a tenant using atomic $set on sub-fields.
+     *
+     * @param string               $identifier Tenant identifier
+     * @param array<string, mixed> $settings   Key-value pairs to persist
+     */
+    public function storeSettings(string $identifier, array $settings): bool
+    {
+        $updates = [];
+        foreach ($settings as $key => $value) {
+            $updates["settings.{$key}"] = $value;
+        }
+
+        $result = $this->dataStore->selectCollection(self::COLLECTION_NAME)->updateOne(
+            ['identifier' => $identifier],
+            ['$set' => $updates]
+        );
+
+        return $result->getMatchedCount() > 0;
+    }
+
 }