fix: Complete memory leak fix for shortcode context handling

- Changed shortcode context from boolean to depth counter for nested shortcodes
- Added shortcode context protection to template-wrapper.php for single page views
- Fixes remaining recursion path in single FediStream post views

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.3] - 2026-02-02
+
+### Fixed
+
+- **Further memory leak fix** - v0.4.2 fix was still incomplete
+  - Changed `$in_shortcode_context` boolean to `$shortcode_context_depth` counter to properly handle nested shortcodes
+  - Added shortcode context protection to `template-wrapper.php` for single page views
+  - This fixes the remaining recursion path where `the_content` filter was still being applied when viewing single FediStream posts (artists, albums, tracks, playlists)
+
 ## [0.4.2] - 2026-02-02
 
 ### Fixed
@@ -217,7 +226,8 @@ Initial release of WP FediStream - a WordPress plugin for streaming music over A
 
 ---
 
-[Unreleased]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.2...HEAD
+[Unreleased]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.3...HEAD
+[0.4.3]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.2...v0.4.3
 [0.4.2]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.1...v0.4.2
 [0.4.1]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.0...v0.4.1
 [0.4.0]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.3.0...v0.4.0

includes/Frontend/TemplateLoader.php

@@ -36,12 +36,13 @@ class TemplateLoader {
     private const MAX_RECURSION_DEPTH = 3;
 
     /**
-     * Whether we're currently in a shortcode rendering context.
+     * Shortcode rendering context depth counter.
-     * When true, the_content filter is skipped to prevent recursive shortcode processing.
+     * When > 0, the_content filter is skipped to prevent recursive shortcode processing.
+     * Using a counter instead of boolean to handle nested shortcodes properly.
      *
-     * @var bool
+     * @var int
      */
-    private static bool $in_shortcode_context = false;
+    private static int $shortcode_context_depth = 0;
 
     /**
      * Enter shortcode rendering context.
@@ -50,7 +51,7 @@ class TemplateLoader {
      * @return void
      */
     public static function enter_shortcode_context(): void {
-        self::$in_shortcode_context = true;
+        ++self::$shortcode_context_depth;
     }
 
     /**
@@ -60,7 +61,9 @@ class TemplateLoader {
      * @return void
      */
     public static function exit_shortcode_context(): void {
-        self::$in_shortcode_context = false;
+        if ( self::$shortcode_context_depth > 0 ) {
+            --self::$shortcode_context_depth;
+        }
     }
 
     /**
@@ -69,7 +72,7 @@ class TemplateLoader {
      * @return bool
      */
     public static function is_in_shortcode_context(): bool {
-        return self::$in_shortcode_context;
+        return self::$shortcode_context_depth > 0;
     }
 
     /**
@@ -253,7 +256,7 @@ class TemplateLoader {
         // Skip the_content filter if:
         // 1. We're in a shortcode context (prevents recursive shortcode processing)
         // 2. We're at depth > 1 (nested data loading)
-        $skip_content_filter = self::$in_shortcode_context || self::$recursion_depth > 1;
+        $skip_content_filter = self::$shortcode_context_depth > 0 || self::$recursion_depth > 1;
 
         $data = array(
             'id'        => $post->ID,

includes/Frontend/template-wrapper.php

@@ -13,6 +13,9 @@ if ( ! defined( 'ABSPATH' ) ) {
 use WP_FediStream\Plugin;
 use WP_FediStream\Frontend\TemplateLoader;
 
+// Enter shortcode context to prevent recursive shortcode processing in post content.
+TemplateLoader::enter_shortcode_context();
+
 // Get template context.
 $context = TemplateLoader::get_context();
 
@@ -75,4 +78,7 @@ get_header();
 </main>
 
 <?php
+// Exit shortcode context.
+TemplateLoader::exit_shortcode_context();
+
 get_footer();

wp-fedistream.php

@@ -3,7 +3,7 @@
  * Plugin Name: WP FediStream
  * Plugin URI: https://src.bundespruefstelle.ch/magdev/wp-fedistream
  * Description: Stream music over ActivityPub - Build your own music streaming platform for Musicians and Labels.
- * Version: 0.4.2
+ * Version: 0.4.3
  * Requires at least: 6.4
  * Requires PHP: 8.3
  * Author: Marco Graetsch
@@ -26,7 +26,7 @@ if ( ! defined( 'ABSPATH' ) ) {
  *
  * @var string
  */
-define( 'WP_FEDISTREAM_VERSION', '0.4.2' );
+define( 'WP_FEDISTREAM_VERSION', '0.4.3' );
 
 /**
  * Plugin file path.