Avoid use of theme constants

src/Assets/Assets.php

@@ -106,7 +106,7 @@ public function getAssetUri( $asset ) {
 			return '';
 		}
 
-		return $this->getThemeUri() . '/' . APP_DIST_DIR_NAME . '/' . $path;
+		return $this->getThemeUri() . '/dist/' . $path;
 	}
 
 	/**

src/Assets/Manifest.php

@@ -21,7 +21,7 @@ class Manifest {
 	 * {@inheritDoc}
 	 */
 	protected function getJsonPath() {
-		return APP_DIST_DIR . 'manifest.json';
+		return get_template_directory() . DIRECTORY_SEPARATOR . 'dist' . DIRECTORY_SEPARATOR . 'manifest.json';
 	}
 
 	/**
@@ -33,5 +33,7 @@ protected function load( $file ) {
 		} catch ( JsonFileNotFoundException $e ) {
 			// We used to throw an exception here but it just causes confusion for new users.
 		}
+
+		return [];
 	}
 }

src/Config/Config.php

@@ -20,6 +20,6 @@ class Config {
 	 * {@inheritDoc}
 	 */
 	protected function getJsonPath() {
-		return APP_DIR . 'config.json';
+		return get_template_directory() . DIRECTORY_SEPARATOR . 'config.json';
 	}
 }