fix: apply child theme config recursively after providers register

src/Bootstrap/LoadConfiguration.php

@@ -26,7 +26,12 @@ public function bootstrap(ApplicationContract $app)
 		$childApp = clone $app;
 		$childApp->useConfigPath(get_stylesheet_directory() . '/config');
 
-		$this->loadChildConfigurationFiles($childApp, $app->get('config'));
+		// Deferred until every provider has registered, so child config also overrides package defaults.
+		// Example: a package's register() adds five defaults under `shop.labels`; applying a child theme's
+		// single-key override earlier would let that shallow merge drop the other four.
+		$app->booting(function () use ($app, $childApp): void {
+			$this->loadChildConfigurationFiles($childApp, $app->get('config'));
+		});
 	}
 
 	public function loadChildConfigurationFiles(Application $childApp, Repository $repository): void
@@ -38,11 +43,31 @@ public function loadChildConfigurationFiles(Application $childApp, Repository $r
 			if (0 === count($config)) {
 				$repository->unset($key);
 			} else {
-				$repository->set($key, array_merge(
+				$repository->set($key, $this->mergeRecursively(
 					$repository->get($key, []),
 					$config
 				));
 			}
 		}
 	}
+
+	/**
+	 * Merges nested arrays key by key, so a child theme overriding one nested value
+	 * keeps the parent's siblings instead of replacing the whole array.
+	 *
+	 * @param array<string, mixed> $base
+	 * @param array<string, mixed> $overrides
+	 *
+	 * @return array<string, mixed>
+	 */
+	private function mergeRecursively(array $base, array $overrides): array
+	{
+		foreach ($overrides as $key => $value) {
+			$base[$key] = is_array($value) && is_array($base[$key] ?? null) && ! array_is_list($value)
+				? $this->mergeRecursively($base[$key], $value)
+				: $value;
+		}
+
+		return $base;
+	}
 }