Object cache (Redis drop-in): enable/disable, UI, and purge behavior

- ObjectCache: detect drop-in, enable/disable, restore on activation, flush
- Only show Object Cache block when Redis constants available (no toggle when unavailable)
- Preference option (1/true/null) respected; restore drop-in when preference on but file missing
- enable() returns error when Redis not configured; no download attempted
- Disable: flush + clear options cache (active_plugins, alloptions), shutdown flush so Redis stays empty
- purge_all (nfd_purge_all=1) and CacheController purge_all now flush object cache
- Lifecycle: maybe_restore_on_activation, maybe_remove_dropin_if_unavailable, clear_options_object_cache
- REST get_settings and runtime call maybe_restore_dropin so UI state matches preference
- Add credis to composer for drop-in compatibility
- UI: Object Cache section with toggle; sync with store on cache level change

Author: arunshenoy99

build/performance/performance-rtl.css

@@ -1 +1 @@
-<?php return array('dependencies' => array('lodash', 'react', 'react-dom', 'react-jsx-runtime', 'wp-api-fetch', 'wp-data', 'wp-dom-ready', 'wp-element', 'wp-i18n'), 'version' => '2244fe1f30f2c155ac60');
+<?php return array('dependencies' => array('lodash', 'react', 'react-dom', 'react-jsx-runtime', 'wp-api-fetch', 'wp-data', 'wp-dom-ready', 'wp-element', 'wp-i18n'), 'version' => '14cf446de2a270de47ee');

build/performance/performance.css

@@ -32,6 +32,7 @@
         }
     },
     "require": {
+        "colinmollenhour/credis": "^1.14",
         "newfold-labs/wp-module-context": "^1.0",
         "wp-forge/collection": "^1.0",
         "wp-forge/wp-htaccess-manager": "^1.0",

build/performance/performance.min.asset.php

@@ -4,6 +4,8 @@
 
 use NewfoldLabs\WP\ModuleLoader\Container;
 
+use NewfoldLabs\WP\Module\Performance\Cache\Types\ObjectCache;
+
 use function NewfoldLabs\WP\Module\Performance\get_cache_exclusion;
 use function NewfoldLabs\WP\Module\Performance\get_cache_level;
 
@@ -73,10 +75,12 @@ public function on_cache_level_change() {
 	 * @return array SDK data.
 	 */
 	public function add_to_runtime( $sdk ) {
-
+		// If preference is "on" but the drop-in is missing, restore so runtime has correct enabled state.
+		ObjectCache::maybe_restore_dropin();
 		$values = array(
-			'level'     => get_cache_level(),
-			'exclusion' => get_cache_exclusion(),
+			'level'       => get_cache_level(),
+			'exclusion'   => get_cache_exclusion(),
+			'objectCache' => ObjectCache::get_state(),
 		);
 
 		return array_merge( $sdk, array( 'cache' => $values ) );

build/performance/performance.min.css

@@ -4,6 +4,7 @@
 
 use NewfoldLabs\WP\Module\Performance\Performance;
 use NewfoldLabs\WP\Module\Performance\Cache\Types\CacheBase;
+use NewfoldLabs\WP\Module\Performance\Cache\Types\ObjectCache;
 use wpscholar\Url;
 
 use function NewfoldLabs\WP\Module\Performance\to_studly_case;
@@ -102,6 +103,7 @@ public function purge_all() {
 				$instance->purge_all();
 			}
 		}
+		ObjectCache::flush_object_cache();
 	}
 
 	/**