revert: Restore conditional the_content filter usage

- Reverted nuclear option from v0.4.8
- get_post_data() now uses the_content filter conditionally
- All other protections remain in place
- Memory leak investigation to be continued later

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

.gitea/workflows/release.yml

@@ -0,0 +1,195 @@
+name: Create Release Package
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build-release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.3'
+          extensions: mbstring, xml, zip, intl, gettext
+          tools: composer:v2
+
+      - name: Get version from tag
+        id: version
+        run: |
+          VERSION=${GITHUB_REF_NAME#v}
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          echo "Building version: $VERSION"
+
+      - name: Validate composer.json
+        run: composer validate --strict
+
+      - name: Install Composer dependencies (production)
+        run: |
+          composer config platform.php 8.3.0
+          composer install --no-dev --optimize-autoloader --no-interaction
+
+      - name: Install gettext
+        run: apt-get update && apt-get install -y gettext
+
+      - name: Compile translations
+        run: |
+          for po in languages/*.po; do
+            if [ -f "$po" ]; then
+              mo="${po%.po}.mo"
+              echo "Compiling $po to $mo"
+              msgfmt -o "$mo" "$po"
+            fi
+          done
+
+      - name: Verify plugin version matches tag
+        run: |
+          PLUGIN_VERSION=$(grep -oP "Version:\s*\K[0-9]+\.[0-9]+\.[0-9]+" wp-fedistream.php | head -1)
+          TAG_VERSION=${{ steps.version.outputs.version }}
+          if [ "$PLUGIN_VERSION" != "$TAG_VERSION" ]; then
+            echo "Error: Plugin version ($PLUGIN_VERSION) does not match tag version ($TAG_VERSION)"
+            exit 1
+          fi
+          echo "Version verified: $PLUGIN_VERSION"
+
+      - name: Create release directory
+        run: mkdir -p releases
+
+      - name: Build release package
+        run: |
+          VERSION=${{ steps.version.outputs.version }}
+          PLUGIN_NAME="wp-fedistream"
+          RELEASE_FILE="releases/${PLUGIN_NAME}-${VERSION}.zip"
+
+          # Move to parent directory for proper zip structure
+          cd ..
+
+          # Create zip with proper WordPress plugin structure
+          zip -r "${PLUGIN_NAME}/${RELEASE_FILE}" "${PLUGIN_NAME}" \
+            -x "${PLUGIN_NAME}/.git/*" \
+            -x "${PLUGIN_NAME}/.gitea/*" \
+            -x "${PLUGIN_NAME}/.github/*" \
+            -x "${PLUGIN_NAME}/.vscode/*" \
+            -x "${PLUGIN_NAME}/.claude/*" \
+            -x "${PLUGIN_NAME}/.gitea/*" \
+            -x "${PLUGIN_NAME}/CLAUDE.md" \
+            -x "${PLUGIN_NAME}/wp-core" \
+            -x "${PLUGIN_NAME}/wp-core/*" \
+            -x "${PLUGIN_NAME}/wp-plugins" \
+            -x "${PLUGIN_NAME}/wp-plugins/*" \
+            -x "${PLUGIN_NAME}/releases/*" \
+            -x "${PLUGIN_NAME}/composer.lock" \
+            -x "${PLUGIN_NAME}/*.log" \
+            -x "${PLUGIN_NAME}/.gitignore" \
+            -x "${PLUGIN_NAME}/.gitmodules" \
+            -x "${PLUGIN_NAME}/.editorconfig" \
+            -x "${PLUGIN_NAME}/phpcs.xml*" \
+            -x "${PLUGIN_NAME}/phpunit.xml*" \
+            -x "${PLUGIN_NAME}/tests/*" \
+            -x "${PLUGIN_NAME}/*.po~" \
+            -x "${PLUGIN_NAME}/*.bak" \
+            -x "*.DS_Store"
+
+          cd "${PLUGIN_NAME}"
+          echo "Created: ${RELEASE_FILE}"
+
+      - name: Generate checksums
+        run: |
+          VERSION=${{ steps.version.outputs.version }}
+          RELEASE_FILE="releases/wp-fedistream-${VERSION}.zip"
+
+          cd releases
+          sha256sum "wp-fedistream-${VERSION}.zip" > "wp-fedistream-${VERSION}.zip.sha256"
+
+          echo "SHA256:"
+          cat "wp-fedistream-${VERSION}.zip.sha256"
+
+      - name: Verify package structure
+        run: |
+          set +o pipefail
+          VERSION=${{ steps.version.outputs.version }}
+          echo "Package contents:"
+          unzip -l "releases/wp-fedistream-${VERSION}.zip" | head -50 || true
+
+          # Verify main file is at correct location
+          if unzip -l "releases/wp-fedistream-${VERSION}.zip" | grep -q "wp-fedistream/wp-fedistream.php"; then
+            echo "✓ Main plugin file at correct location"
+          else
+            echo "✗ Error: Main plugin file not found at wp-fedistream/wp-fedistream.php"
+            exit 1
+          fi
+
+          # Verify vendor directory is included
+          if unzip -l "releases/wp-fedistream-${VERSION}.zip" | grep -q "wp-fedistream/vendor/"; then
+            echo "✓ Vendor directory included"
+          else
+            echo "✗ Error: Vendor directory not found"
+            exit 1
+          fi
+
+      - name: Extract changelog for release notes
+        id: changelog
+        run: |
+          VERSION=${{ steps.version.outputs.version }}
+          # Extract changelog section for this version
+          NOTES=$(sed -n "/^## \[${VERSION}\]/,/^## \[/p" CHANGELOG.md | sed '$ d' | tail -n +2)
+          if [ -z "$NOTES" ]; then
+            NOTES="Release version ${VERSION}"
+          fi
+          # Save to file for multi-line output
+          echo "$NOTES" > release_notes.txt
+          echo "Release notes extracted"
+
+      - name: Create Gitea Release
+        env:
+          GITEA_TOKEN: ${{ secrets.SRC_GITEA_TOKEN }}
+        run: |
+          VERSION=${{ steps.version.outputs.version }}
+          TAG_NAME=${{ github.ref_name }}
+          PRERELEASE="false"
+          if [[ "$TAG_NAME" == *-* ]]; then
+            PRERELEASE="true"
+          fi
+
+          # Read release notes
+          BODY=$(cat release_notes.txt)
+
+          # Create release via Gitea API
+          RELEASE_RESPONSE=$(curl -s -X POST \
+            -H "Authorization: token ${GITEA_TOKEN}" \
+            -H "Content-Type: application/json" \
+            -d "{\"tag_name\": \"${TAG_NAME}\", \"name\": \"Release ${VERSION}\", \"body\": $(echo "$BODY" | jq -Rs .), \"draft\": false, \"prerelease\": ${PRERELEASE}}" \
+            "${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}/releases")
+
+          RELEASE_ID=$(echo "$RELEASE_RESPONSE" | jq -r '.id')
+
+          if [ "$RELEASE_ID" == "null" ] || [ -z "$RELEASE_ID" ]; then
+            echo "Failed to create release:"
+            echo "$RELEASE_RESPONSE"
+            exit 1
+          fi
+
+          echo "Created release ID: $RELEASE_ID"
+
+          # Upload attachments
+          for file in "releases/wp-fedistream-${VERSION}.zip" "releases/wp-fedistream-${VERSION}.zip.sha256"; do
+            if [ -f "$file" ]; then
+              FILENAME=$(basename "$file")
+              echo "Uploading $FILENAME..."
+              curl -s -X POST \
+                -H "Authorization: token ${GITEA_TOKEN}" \
+                -H "Content-Type: application/octet-stream" \
+                --data-binary "@$file" \
+                "${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}/releases/${RELEASE_ID}/assets?name=${FILENAME}"
+              echo "Uploaded $FILENAME"
+            fi
+          done
+
+          echo "Release created successfully: ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/releases/tag/${TAG_NAME}"

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "lib/wc-licensed-product-client"]
+	path = lib/wc-licensed-product-client
+	url = ../wc-licensed-product-client.git

CHANGELOG.md

@@ -7,6 +7,136 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.9] - 2026-02-02
+
+### Changed
+
+- **Reverted nuclear option** - Restored conditional the_content filter usage
+  - `get_post_data()` now uses the_content filter only when NOT in shortcode context, NOT at depth > 1, and NOT loading page template
+  - All other protections remain in place (render depth, page template loading flag, main template lock, shortcode context)
+  - Memory leak investigation to be continued later
+
+## [0.4.8] - 2026-02-02
+
+### Fixed
+
+- **Nuclear option: NEVER apply the_content filter** - Completely removed the_content filter usage (reverted in 0.4.9)
+  - `get_post_data()` now ALWAYS strips shortcodes and uses raw content
+  - NEVER calls `apply_filters('the_content', ...)` or `get_the_excerpt()`
+  - FediStream posts don't need shortcode processing in their content anyway
+  - This guarantees no recursion through WordPress hook system
+
+## [0.4.7] - 2026-02-02
+
+### Fixed
+
+- **Hard main template rendering lock** - Added additional protection at Plugin::render() level
+  - Added `$rendering_main_template` flag that completely blocks any other render calls while main template is rendering
+  - Reduced MAX_RENDER_DEPTH from 5 to 2 (allows one level of {% include %} but prevents deeper recursion)
+  - template-wrapper.php now passes `is_main_template = true` to enable the hard lock
+  - Any render attempt during main template rendering is immediately blocked
+
+## [0.4.6] - 2026-02-02
+
+### Fixed
+
+- **Page template loading lock** - Block ALL shortcode rendering during page template loading
+  - Added `$loading_page_template` flag in TemplateLoader
+  - template-wrapper.php now sets this flag before loading theme header/footer
+  - Shortcodes::render_template() checks this flag and returns early if set
+  - This prevents any recursion triggered by theme components, widgets, or other plugins during page template loading
+  - Main template rendering still works (uses Plugin::render() directly, not through Shortcodes)
+
+## [0.4.5] - 2026-02-02
+
+### Fixed
+
+- **Multi-layer recursion protection** - Added additional safeguards against infinite Twig rendering
+  - Added render depth tracking in `Plugin::render()` with max depth of 5
+  - Strip shortcodes from content when in shortcode context (prevents any later `do_shortcode()` calls from triggering recursion)
+  - This addresses the Twig StagingExtension.php recursion error
+
+## [0.4.4] - 2026-02-02
+
+### Fixed
+
+- **Fix excerpt-triggered recursion** - `get_the_excerpt()` internally calls `the_content` filter when generating auto-excerpts
+  - When in shortcode context, now uses raw `$post->post_excerpt` or generates simple excerpt with `wp_trim_words()` instead
+  - This was the remaining recursion path causing memory exhaustion in `class-wp-hook.php`
+
+## [0.4.3] - 2026-02-02
+
+### Fixed
+
+- **Further memory leak fix** - v0.4.2 fix was still incomplete
+  - Changed `$in_shortcode_context` boolean to `$shortcode_context_depth` counter to properly handle nested shortcodes
+  - Added shortcode context protection to `template-wrapper.php` for single page views
+  - This fixes the remaining recursion path where `the_content` filter was still being applied when viewing single FediStream posts (artists, albums, tracks, playlists)
+
+## [0.4.2] - 2026-02-02
+
+### Fixed
+
+- **Complete fix for memory leak** - v0.4.1 fix was incomplete
+  - Added `$in_shortcode_context` flag to TemplateLoader to track when we're rendering shortcodes
+  - All shortcode render methods now call `enter_shortcode_context()` before loading data
+  - When in shortcode context, `the_content` filter is always skipped to prevent recursive shortcode processing
+  - This prevents infinite recursion when post content contains FediStream shortcodes
+
+## [0.4.1] - 2026-02-02
+
+### Fixed
+
+- **Critical memory leak** causing "Allowed memory size exhausted" errors in Twig's StagingExtension
+  - Root cause: `apply_filters('the_content')` in `get_post_data()` triggered shortcode processing, causing infinite recursion when post content contained FediStream shortcodes
+  - Added recursion depth tracking with `MAX_RECURSION_DEPTH = 3` to prevent runaway nesting
+  - Nested items now skip `the_content` filter, using `wp_kses_post()` instead
+  - Nested data loading (albums within artists, tracks within albums) is now properly bounded
+
+### Changed
+
+- Made `get_artist_data()`, `get_album_data()`, `get_track_data()`, and `get_playlist_data()` public methods in TemplateLoader (previously private but called externally)
+- These methods now accept both `int` post IDs and `WP_Post` objects for flexibility
+- Added `$load_nested` parameter to control whether nested items are fully loaded or just counted
+
+## [0.4.0] - 2026-01-29
+
+### Added
+
+- Gitea Actions CI/CD pipeline for automated release package creation
+  - Triggered by `v*` tags
+  - PHP 8.3 environment with production dependencies
+  - Automatic translation compilation (.po to .mo)
+  - Version verification (plugin version must match tag)
+  - WordPress-compliant zip structure
+  - SHA256 checksum generation
+  - Package structure verification
+  - Changelog extraction for release notes
+  - Automatic Gitea release creation with attachments
+  - Pre-release detection for tags containing `-`
+
+## [0.3.0] - 2026-01-29
+
+### Added
+
+- License management integration using `magdev/wc-licensed-product-client` package
+- Tabbed settings page with License, Default Settings, and Integrations tabs
+- License validation and activation via AJAX with real-time status updates
+- License status banner showing current license state and expiration
+- License checks for frontend components (unlicensed sites show message instead of content)
+
+### Changed
+
+- Reorganized settings page into three tabs for better organization
+- Frontend features (player, shortcodes, ActivityPub) now require valid license
+- Admin/backend functionality works regardless of license status
+
+### Security
+
+- Server secret stored securely in WordPress options
+- HMAC signature verification for license server responses
+- Nonce verification for all license AJAX operations
+
 ## [0.2.0] - 2026-01-28
 
 ### Added
@@ -153,7 +283,18 @@ Initial release of WP FediStream - a WordPress plugin for streaming music over A
 
 ---
 
-[Unreleased]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.2.0...HEAD
+[Unreleased]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.9...HEAD
+[0.4.9]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.8...v0.4.9
+[0.4.8]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.7...v0.4.8
+[0.4.7]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.6...v0.4.7
+[0.4.6]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.5...v0.4.6
+[0.4.5]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.4...v0.4.5
+[0.4.4]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.3...v0.4.4
+[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
+[0.3.0]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.2.0...v0.3.0
 [0.2.0]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.1.1...v0.2.0
 [0.1.1]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.1.0...v0.1.1
 [0.1.0]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/releases/tag/v0.1.0

CLAUDE.md

@@ -24,9 +24,7 @@ This project is proudly **"vibe-coded"** using Claude.AI - the entire codebase w
 
 **Note for AI Assistants:** Clean this section after the specific features are done or new releases are made. Effective changes are tracked in `CHANGELOG.md`. Do not add completed versions here - document them in the Session History section at the end of this file.
 
-### Version 0.2.1 (Bugfix)
+(No pending features - all roadmap items completed)
-
-### Version 0.3.0 (Minor)
 
 ## Technical Stack
 
@@ -128,11 +126,48 @@ for po in languages/*.po; do msgfmt -o "${po%.po}.mo" "$po"; done
 #### What's Excluded
 
 - Git metadata (`.git/`)
-- Development files (`.vscode/`, `.claude/`, `CLAUDE.md`, `wp-core`, `wp-plugins`)
+- Development files (`.vscode/`, `.claude/`, `.gitea/`, `CLAUDE.md`, `wp-core`, `wp-plugins`)
 - Logs and cache files
 - Previous releases
 - `composer.lock` (but `vendor/` is included)
 
+#### CI/CD Pipeline (Gitea Actions)
+
+Automated release packages are created via Gitea Actions when a tag matching `v*` is pushed:
+
+**Workflow:** `.gitea/workflows/release.yml`
+
+**Trigger:** Push tag `vX.X.X` to repository
+
+**Steps:**
+
+1. Checkout code
+2. Setup PHP 8.3 with required extensions
+3. Install production Composer dependencies
+4. Compile translations (.po to .mo)
+5. Verify plugin version matches tag version
+6. Build release zip with proper WordPress structure
+7. Generate SHA256 checksums
+8. Verify package structure
+9. Extract changelog for release notes
+10. Create Gitea release with attachments
+
+**Required Secret:** `GITEA_TOKEN` - Personal access token with release permissions
+
+**Pre-release Detection:** Tags containing `-` (e.g., `v1.0.0-beta`) are marked as pre-release
+
+**To create a release:**
+
+```bash
+# Ensure version is updated in wp-fedistream.php (both header and constant)
+git checkout main
+git merge dev
+git tag -a v0.4.0 -m "Release v0.4.0"
+git push origin main --tags
+```
+
+The pipeline will automatically build and publish the release package.
+
 ---
 
 **For AI Assistants:**
@@ -186,6 +221,9 @@ When editing CLAUDE.md or other markdown files, follow these rules to avoid lint
 
 ```txt
 wp-fedistream/
+├── .gitea/
+│   └── workflows/
+│       └── release.yml        # CI/CD release pipeline
 ├── assets/
 │   ├── css/
 │   │   ├── admin.css          # Admin interface styles
@@ -397,3 +435,120 @@ wp-fedistream/
 - Successfully pushed dev, main branches and v0.1.0 tag to origin
 - Remote URL updated from HTTPS to SSH for authentication
 - First release is now live at the repository
+
+### 2026-01-28 - Bugfix v0.1.1 and Feature v0.2.0
+
+**Summary:** Fixed WooCommerce integration timing bug, added plugin action links and user guide.
+
+**v0.1.1 - Bugfix:**
+
+- Fixed WooCommerce product types not appearing in product selector
+- Root cause: `Integration` constructor hooked `check_woocommerce` to `plugins_loaded` priority 5, but class was instantiated at priority 10 (too late)
+- Solution: Call `check_woocommerce()` directly in constructor
+
+**v0.2.0 - Features:**
+
+- Added Dashboard and Settings links to WordPress Plugins page
+- Created comprehensive `USERGUIDE.md` covering all features
+
+**Files Modified:**
+
+- `includes/WooCommerce/Integration.php` - Fixed hook timing
+- `includes/Plugin.php` - Added `add_plugin_action_links()` method
+
+**Files Created:**
+
+- `USERGUIDE.md` - Comprehensive user documentation
+
+**Notes:**
+
+- All releases pushed to origin (v0.1.1 and v0.2.0 tags)
+- Markdown linting fixes applied to USERGUIDE.md
+
+### 2026-01-29 - License Management v0.3.0
+
+**Summary:** Implemented license management integration and reorganized settings page into tabs.
+
+**Features:**
+
+- License management using `magdev/wc-licensed-product-client` package
+- Tabbed settings page: License, Default Settings, Integrations
+- License validation and activation via AJAX
+- License status banner with expiration display
+- Frontend license checks (unlicensed sites show message instead of content)
+- Admin/backend works regardless of license status
+
+**License Behavior:**
+
+- Backend (admin): Full access always
+- Frontend (player, shortcodes, ActivityPub): Requires valid license
+
+**Files Created:**
+
+- `includes/License/Manager.php` - License management wrapper class
+
+**Files Modified:**
+
+- `composer.json` - Added VCS repository and `magdev/wc-licensed-product-client` dependency
+- `includes/Plugin.php` - Tabbed settings page, license manager initialization, conditional frontend loading
+- `includes/Installer.php` - Added default license options
+- `includes/Frontend/Shortcodes.php` - Added unlicensed mode support
+- `includes/Frontend/Ajax.php` - Added license checks to public AJAX endpoints
+- `assets/js/admin.js` - License validation AJAX handlers
+- `assets/css/admin.css` - Tab and license status styling
+- `wp-fedistream.php` - Version bump to 0.3.0
+- `CHANGELOG.md` - Added v0.3.0 entry
+
+**Notes:**
+
+- Package name is `magdev/wc-licensed-product-client` (not `wc-license-product-client`)
+- Uses Symfony HTTP Client via the license client package
+- License validation cached for 24 hours using WordPress transients
+
+### 2026-01-29 - CI/CD Pipeline v0.4.0
+
+**Summary:** Added Gitea Actions workflow for automated release package creation with multiple iterations to fix CI issues.
+
+**Features:**
+
+- Automated release builds triggered by `v*` tags
+- PHP 8.3 environment with required extensions
+- Production Composer dependency installation
+- Automatic translation compilation (.po to .mo)
+- Version verification (plugin version must match tag)
+- Proper WordPress plugin zip structure
+- SHA256 checksum generation
+- Package structure verification
+- Changelog extraction for release notes
+- Automatic Gitea release creation via API
+- Pre-release detection for tags containing `-`
+
+**Files Created:**
+
+- `.gitea/workflows/release.yml` - CI/CD release pipeline
+- `.gitmodules` - Git submodule configuration
+- `lib/wc-licensed-product-client/` - Submodule for private dependency
+
+**Files Modified:**
+
+- `CLAUDE.md` - Added CI/CD documentation and updated directory structure
+- `CHANGELOG.md` - Added v0.4.0 entry
+- `wp-fedistream.php` - Version bump to 0.4.0
+- `composer.json` - Changed to path repository for submodule
+- `README.md` - Updated for v0.4.0, added release/installation docs
+
+**CI/CD Fixes Applied:**
+
+1. `actions/gitea-release-action@v1` doesn't exist - use Gitea API directly with curl
+2. Private repo network issue - use git submodule with relative URL (`../wc-licensed-product-client.git`)
+3. Composer path repository for submodule dependency
+4. `msgfmt` not found - install gettext package
+5. SIGPIPE error (exit 141) - use `set +o pipefail` and `|| true`
+
+**Notes:**
+
+- Requires `SRC_GITEA_TOKEN` secret configured in repository settings
+- Uses `shivammathur/setup-php@v2` for PHP setup
+- Uses Gitea API directly for release creation (not GitHub Actions)
+- Submodule uses relative URL for CI compatibility
+- Composer symlinks from `lib/wc-licensed-product-client` to vendor

README.md

@@ -2,10 +2,11 @@
 
 Stream music over ActivityPub - Build your own music streaming platform for Musicians and Labels.
 
-[![Version](https://img.shields.io/badge/version-0.2.0-blue.svg)](CHANGELOG.md)
+[![Version](https://img.shields.io/badge/version-0.4.0-blue.svg)](CHANGELOG.md)
 [![PHP](https://img.shields.io/badge/PHP-%3E%3D8.3-purple.svg)](https://php.net)
 [![WordPress](https://img.shields.io/badge/WordPress-%3E%3D6.4-blue.svg)](https://wordpress.org)
 [![License](https://img.shields.io/badge/license-GPL--2.0%2B-green.svg)](https://www.gnu.org/licenses/gpl-2.0.html)
+[![CI/CD](https://img.shields.io/badge/CI%2FCD-Gitea%20Actions-green.svg)](https://src.bundespruefstelle.ch/magdev/wp-fedistream/actions)
 
 ## Description
 
@@ -31,29 +32,47 @@ WP FediStream is a WordPress plugin that enables musicians, bands, and labels to
 
 - PHP 8.3 or higher
 - WordPress 6.4 or higher
-- Composer (for development/installation)
+- Valid license key (required for frontend features)
 
 ### Optional
 
 - [ActivityPub Plugin](https://wordpress.org/plugins/activitypub/) - For Fediverse integration
 - [WooCommerce](https://woocommerce.com/) 10.0+ - For selling music
 
+## License Key
+
+WP FediStream requires a valid license key for frontend functionality (player, shortcodes, ActivityPub). The admin dashboard works without a license, allowing you to configure the plugin before activation.
+
+To obtain a license key, contact the author or purchase from the official website.
+
 ## Installation
 
-### From Source
+### From Release Package (Recommended)
 
-1. Clone or download the repository to your WordPress plugins directory:
+1. Download the latest release from the [Releases page](https://src.bundespruefstelle.ch/magdev/wp-fedistream/releases)
+
+2. Upload the ZIP file via **Plugins > Add New > Upload Plugin** in WordPress admin
+
+3. Activate the plugin under **Plugins > Installed Plugins**
+
+4. Navigate to **FediStream > Settings** and enter your license key
+
+5. Start using the plugin via the **FediStream** admin menu
+
+### From Source (Development)
+
+1. Clone the repository to your WordPress plugins directory:
 
    ```bash
    cd wp-content/plugins/
-   git clone https://src.bundespruefstelle.ch/magdev/wp-fedistream.git
+   git clone --recurse-submodules https://src.bundespruefstelle.ch/magdev/wp-fedistream.git
    ```
 
 2. Install Composer dependencies:
 
    ```bash
    cd wp-fedistream
-   composer install --no-dev
+   composer install
    ```
 
 3. Activate the plugin in WordPress admin under **Plugins > Installed Plugins**
@@ -133,6 +152,16 @@ wp-fedistream/
 └── wp-fedistream.php  # Plugin entry point
 ```
 
+## Releases
+
+Release packages are automatically built via Gitea Actions when a version tag is pushed. Each release includes:
+
+- Production-ready ZIP package with all dependencies
+- SHA256 checksum for verification
+- Changelog notes extracted from CHANGELOG.md
+
+Download releases from: <https://src.bundespruefstelle.ch/magdev/wp-fedistream/releases>
+
 ## Contributing
 
 This project is in early development. Contributions, bug reports, and feature requests are welcome.

USERGUIDE.md

@@ -66,7 +66,7 @@ After activation, configure FediStream through **FediStream > Settings**.
 ### General Settings
 
 | Setting | Description | Default |
-|---------|-------------|---------|
+| --------- | ------------- | --------- |
 | ActivityPub Integration | Enable Fediverse features for sharing releases | Enabled |
 | WooCommerce Integration | Enable selling music (requires WooCommerce) | Disabled |
 | Max Upload Size | Maximum audio file size in MB | 50 MB |
@@ -110,7 +110,7 @@ Artists represent musicians, bands, duos, or collectives. Each artist can have t
 ### Artist Types
 
 | Type | Description |
-|------|-------------|
+| ------ | ------------- |
 | Solo | Individual musician |
 | Band | Group of musicians |
 | Duo | Two-person musical act |
@@ -141,7 +141,7 @@ Albums organize your music into releases. They can be full albums, EPs, singles,
 ### Album Types
 
 | Type | Description | Typical Track Count |
-|------|-------------|---------------------|
+| ------ | ------------- | --------------------- |
 | Album | Full-length release | 8-15 tracks |
 | EP | Extended Play | 4-6 tracks |
 | Single | Single track release | 1-3 tracks |
@@ -178,7 +178,7 @@ Tracks are the individual songs or audio files in your library.
 ### Audio File Guidelines
 
 | Format | Quality | Recommended For |
-|--------|---------|-----------------|
+| -------- | --------- | ----------------- |
 | MP3 | 320kbps | Web streaming |
 | FLAC | Lossless | Downloads, archival |
 | WAV | Uncompressed | Master files |
@@ -328,7 +328,7 @@ FediStream includes widgets for your sidebar or widget areas.
 ### Available Widgets
 
 | Widget | Description |
-|--------|-------------|
+| -------- | ------------- |
 | Recent Releases | Displays latest album releases |
 | Popular Tracks | Shows most-played tracks |
 | Featured Artist | Highlights a specific artist |
@@ -348,7 +348,7 @@ FediStream includes widgets for your sidebar or widget areas.
 
 FediStream integrates with the Fediverse through ActivityPub, allowing your artists to be followed from Mastodon, Pixelfed, and other platforms.
 
-### Requirements
+### Requirements for ActivityPub integration
 
 Install and activate the [ActivityPub plugin](https://wordpress.org/plugins/activitypub/) from WordPress.org.
 
@@ -370,7 +370,7 @@ https://your-site.com/.well-known/webfinger?resource=acct:artist-name@your-site.
 ### Activity Types
 
 | Activity | When Sent |
-|----------|-----------|
+| ---------- | ----------- |
 | Create | New album or track published |
 | Update | Album or track updated |
 | Delete | Content removed |
@@ -386,7 +386,7 @@ Artist followers are displayed on the artist's admin page under the Followers me
 
 Sell your music directly through your WordPress site using WooCommerce.
 
-### Requirements
+### Requirements for WooCommerce Integration
 
 - WooCommerce 10.0 or higher installed and activated
 - WooCommerce integration enabled in FediStream settings
@@ -409,7 +409,7 @@ Sell your music directly through your WordPress site using WooCommerce.
 ### Pricing Types
 
 | Type | Description |
-|------|-------------|
+| ------ | ------------- |
 | Fixed | Standard fixed price |
 | Pay What You Want (PWYW) | Customer chooses price above minimum |
 | Name Your Price (NYP) | Customer sets any price (including free) |
@@ -517,7 +517,7 @@ Notifications appear in the admin bar and can be configured for email delivery.
 ### URL Slugs
 
 | Content Type | URL Pattern |
-|--------------|-------------|
+| -------------- | ------------- |
 | Artists | `/artists/{slug}/` |
 | Albums | `/albums/{slug}/` |
 | Tracks | `/tracks/{slug}/` |
@@ -528,14 +528,14 @@ Notifications appear in the admin bar and can be configured for email delivery.
 ### User Roles
 
 | Role | Capabilities |
-|------|--------------|
+| ------ | -------------- |
 | FediStream Artist | Manage own content, upload files, view own stats |
 | FediStream Label | Manage all content, manage taxonomies, view all stats |
 
 ### Keyboard Shortcuts (Player)
 
 | Key | Action |
-|-----|--------|
+| ----- | -------- |
 | Space | Play/Pause |
 | Left Arrow | Previous track |
 | Right Arrow | Next track |

assets/css/admin.css

@@ -4,4 +4,122 @@
  * @package WP_FediStream
  */
 
-/* Admin styles will be added here */
+/* Settings page tabs */
+.nav-tab-wrapper + .fedistream-settings-content {
+    margin-top: -1px;
+}
+
+.fedistream-settings-content {
+    background: #fff;
+    border: 1px solid #c3c4c7;
+    border-top: none;
+    padding: 20px;
+}
+
+/* Active tab styling */
+.wrap .nav-tab-wrapper .nav-tab-active {
+    background: #fff;
+    border-bottom-color: #fff;
+}
+
+/* License status banner */
+.fedistream-license-status {
+    margin-bottom: 20px;
+}
+
+.fedistream-license-status .dashicons {
+    color: inherit;
+}
+
+.fedistream-license-status.notice-success .dashicons {
+    color: #00a32a;
+}
+
+.fedistream-license-status.notice-error .dashicons {
+    color: #d63638;
+}
+
+.fedistream-license-status.notice-warning .dashicons {
+    color: #dba617;
+}
+
+.fedistream-license-status.notice-info .dashicons {
+    color: #72aee6;
+}
+
+/* License form buttons */
+#fedistream-license-form .button .dashicons {
+    font-size: 16px;
+    width: 16px;
+    height: 16px;
+    line-height: 1.3;
+}
+
+/* License message display */
+#fedistream-license-message {
+    padding: 10px 15px;
+}
+
+#fedistream-license-message p {
+    margin: 0;
+}
+
+/* Dashboard stats grid */
+.fedistream-stats {
+    display: grid;
+    grid-template-columns: repeat(4, 1fr);
+    gap: 20px;
+    margin: 20px 0;
+}
+
+.fedistream-stat-box {
+    background: #fff;
+    padding: 20px;
+    border: 1px solid #ccd0d4;
+    border-radius: 4px;
+}
+
+.fedistream-stat-box h3 {
+    margin: 0 0 10px;
+}
+
+.fedistream-stat-box p {
+    font-size: 2em;
+    margin: 0;
+    color: #2271b1;
+}
+
+/* Quick actions */
+.fedistream-quick-actions {
+    background: #fff;
+    padding: 20px;
+    border: 1px solid #ccd0d4;
+    border-radius: 4px;
+    margin: 20px 0;
+}
+
+/* Info box */
+.fedistream-info {
+    background: #fff;
+    padding: 20px;
+    border: 1px solid #ccd0d4;
+    border-radius: 4px;
+}
+
+/* Responsive adjustments */
+@media screen and (max-width: 782px) {
+    .fedistream-stats {
+        grid-template-columns: repeat(2, 1fr);
+    }
+
+    #fedistream-license-form .button {
+        display: block;
+        margin: 10px 0 0 0 !important;
+    }
+}
+
+@media screen and (max-width: 480px) {
+    .fedistream-stats {
+        grid-template-columns: 1fr;
+    }
+}

assets/js/admin.js

@@ -8,7 +8,115 @@
     'use strict';
 
     $(document).ready(function() {
-        // Admin scripts will be added here
+        // License validation functionality
+        initLicenseValidation();
     });
 
+    /**
+     * Initialize license validation AJAX handlers.
+     */
+    function initLicenseValidation() {
+        var $validateBtn = $('#fedistream-validate-license');
+        var $activateBtn = $('#fedistream-activate-license');
+        var $spinner = $('#fedistream-license-spinner');
+        var $message = $('#fedistream-license-message');
+
+        if (!$validateBtn.length) {
+            return;
+        }
+
+        // Validate license button
+        $validateBtn.on('click', function(e) {
+            e.preventDefault();
+            performLicenseAction('fedistream_validate_license', 'Validating...');
+        });
+
+        // Activate license button
+        $activateBtn.on('click', function(e) {
+            e.preventDefault();
+            performLicenseAction('fedistream_activate_license', 'Activating...');
+        });
+
+        /**
+         * Perform license AJAX action.
+         *
+         * @param {string} action AJAX action name.
+         * @param {string} loadingText Loading button text.
+         */
+        function performLicenseAction(action, loadingText) {
+            var originalText = $validateBtn.text();
+
+            // Show loading state
+            $spinner.addClass('is-active');
+            $validateBtn.prop('disabled', true);
+            $activateBtn.prop('disabled', true);
+            $message.hide();
+
+            $.ajax({
+                url: ajaxurl,
+                type: 'POST',
+                data: {
+                    action: action,
+                    nonce: fedistreamLicenseNonce
+                },
+                success: function(response) {
+                    $spinner.removeClass('is-active');
+                    $validateBtn.prop('disabled', false);
+                    $activateBtn.prop('disabled', false);
+
+                    if (response.success) {
+                        showMessage('success', response.data.message);
+                        // Reload page to show updated status
+                        setTimeout(function() {
+                            window.location.reload();
+                        }, 1500);
+                    } else {
+                        showMessage('error', response.data.message || 'An error occurred.');
+                    }
+                },
+                error: function(xhr, status, error) {
+                    $spinner.removeClass('is-active');
+                    $validateBtn.prop('disabled', false);
+                    $activateBtn.prop('disabled', false);
+                    showMessage('error', 'Request failed. Please try again.');
+                }
+            });
+        }
+
+        /**
+         * Show a message to the user.
+         *
+         * @param {string} type Message type: 'success', 'error', 'warning', 'info'.
+         * @param {string} text Message text.
+         */
+        function showMessage(type, text) {
+            var classMap = {
+                'success': 'notice-success',
+                'error': 'notice-error',
+                'warning': 'notice-warning',
+                'info': 'notice-info'
+            };
+
+            var noticeClass = classMap[type] || 'notice-info';
+
+            $message
+                .removeClass('notice-success notice-error notice-warning notice-info')
+                .addClass('notice ' + noticeClass)
+                .html('<p>' + escapeHtml(text) + '</p>')
+                .show();
+        }
+
+        /**
+         * Escape HTML entities.
+         *
+         * @param {string} text Text to escape.
+         * @return {string} Escaped text.
+         */
+        function escapeHtml(text) {
+            var div = document.createElement('div');
+            div.textContent = text;
+            return div.innerHTML;
+        }
+    }
+
 })(jQuery);

composer.json

@@ -14,8 +14,15 @@
     "support": {
         "issues": "https://src.bundespruefstelle.ch/magdev/wp-fedistream/issues"
     },
+    "repositories": [
+        {
+            "type": "path",
+            "url": "lib/wc-licensed-product-client"
+        }
+    ],
     "require": {
         "php": ">=8.3",
+        "magdev/wc-licensed-product-client": "^0.2",
         "twig/twig": "^3.0"
     },
     "require-dev": {

composer.lock

@@ -4,8 +4,314 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "c8fb50541e5730c8ad92b76392765aca",
+    "content-hash": "0c8153ac31232ffe7f0af117cec865b4",
     "packages": [
+        {
+            "name": "magdev/wc-licensed-product-client",
+            "version": "v0.2.2",
+            "dist": {
+                "type": "path",
+                "url": "lib/wc-licensed-product-client",
+                "reference": "f9281ec5fb23bf1993ab0240e0347c835009a10f"
+            },
+            "require": {
+                "php": "^8.3",
+                "psr/cache": "^3.0",
+                "psr/http-client": "^1.0",
+                "psr/log": "^3.0",
+                "symfony/http-client": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^11.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Magdev\\WcLicensedProductClient\\": "src/"
+                }
+            },
+            "autoload-dev": {
+                "psr-4": {
+                    "Magdev\\WcLicensedProductClient\\Tests\\": "tests/"
+                }
+            },
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Marco Graetsch",
+                    "email": "magdev3.0@gmail.com",
+                    "homepage": "https://src.bundespruefstelle.ch/magdev"
+                }
+            ],
+            "description": "Client library for WooCommerce Licensed Product Plugin - Activate, validate and check the status of licenses via REST API",
+            "homepage": "https://src.bundespruefstelle.ch/magdev/wc-licensed-product-client",
+            "support": {
+                "issues": "https://src.bundespruefstelle.ch/magdev/wc-licensed-product-client/issues",
+                "source": "https://src.bundespruefstelle.ch/magdev/wc-licensed-product-client"
+            },
+            "transport-options": {
+                "relative": true
+            }
+        },
+        {
+            "name": "psr/cache",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/cache.git",
+                "reference": "aa5030cfa5405eccfdcb1083ce040c2cb8d253bf"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/cache/zipball/aa5030cfa5405eccfdcb1083ce040c2cb8d253bf",
+                "reference": "aa5030cfa5405eccfdcb1083ce040c2cb8d253bf",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.0.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Cache\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for caching libraries",
+            "keywords": [
+                "cache",
+                "psr",
+                "psr-6"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/cache/tree/3.0.0"
+            },
+            "time": "2021-02-03T23:26:27+00:00"
+        },
+        {
+            "name": "psr/container",
+            "version": "2.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/container.git",
+                "reference": "c71ecc56dfe541dbd90c5360474fbc405f8d5963"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/container/zipball/c71ecc56dfe541dbd90c5360474fbc405f8d5963",
+                "reference": "c71ecc56dfe541dbd90c5360474fbc405f8d5963",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.4.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Container\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common Container Interface (PHP FIG PSR-11)",
+            "homepage": "https://github.com/php-fig/container",
+            "keywords": [
+                "PSR-11",
+                "container",
+                "container-interface",
+                "container-interop",
+                "psr"
+            ],
+            "support": {
+                "issues": "https://github.com/php-fig/container/issues",
+                "source": "https://github.com/php-fig/container/tree/2.0.2"
+            },
+            "time": "2021-11-05T16:47:00+00:00"
+        },
+        {
+            "name": "psr/http-client",
+            "version": "1.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-client.git",
+                "reference": "bb5906edc1c324c9a05aa0873d40117941e5fa90"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-client/zipball/bb5906edc1c324c9a05aa0873d40117941e5fa90",
+                "reference": "bb5906edc1c324c9a05aa0873d40117941e5fa90",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0 || ^8.0",
+                "psr/http-message": "^1.0 || ^2.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Client\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP clients",
+            "homepage": "https://github.com/php-fig/http-client",
+            "keywords": [
+                "http",
+                "http-client",
+                "psr",
+                "psr-18"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/http-client"
+            },
+            "time": "2023-09-23T14:17:50+00:00"
+        },
+        {
+            "name": "psr/http-message",
+            "version": "2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-message.git",
+                "reference": "402d35bcb92c70c026d1a6a9883f06b2ead23d71"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-message/zipball/402d35bcb92c70c026d1a6a9883f06b2ead23d71",
+                "reference": "402d35bcb92c70c026d1a6a9883f06b2ead23d71",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Message\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP messages",
+            "homepage": "https://github.com/php-fig/http-message",
+            "keywords": [
+                "http",
+                "http-message",
+                "psr",
+                "psr-7",
+                "request",
+                "response"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/http-message/tree/2.0"
+            },
+            "time": "2023-04-04T09:54:51+00:00"
+        },
+        {
+            "name": "psr/log",
+            "version": "3.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/log.git",
+                "reference": "f16e1d5863e37f8d8c2a01719f5b34baa2b714d3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/log/zipball/f16e1d5863e37f8d8c2a01719f5b34baa2b714d3",
+                "reference": "f16e1d5863e37f8d8c2a01719f5b34baa2b714d3",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.0.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Log\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for logging libraries",
+            "homepage": "https://github.com/php-fig/log",
+            "keywords": [
+                "log",
+                "psr",
+                "psr-3"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/log/tree/3.0.2"
+            },
+            "time": "2024-09-11T13:17:53+00:00"
+        },
         {
             "name": "symfony/deprecation-contracts",
             "version": "v3.6.0",
@@ -73,6 +379,185 @@
             ],
             "time": "2024-09-25T14:21:43+00:00"
         },
+        {
+            "name": "symfony/http-client",
+            "version": "v7.4.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/http-client.git",
+                "reference": "84bb634857a893cc146cceb467e31b3f02c5fe9f"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/http-client/zipball/84bb634857a893cc146cceb467e31b3f02c5fe9f",
+                "reference": "84bb634857a893cc146cceb467e31b3f02c5fe9f",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.2",
+                "psr/log": "^1|^2|^3",
+                "symfony/deprecation-contracts": "^2.5|^3",
+                "symfony/http-client-contracts": "~3.4.4|^3.5.2",
+                "symfony/polyfill-php83": "^1.29",
+                "symfony/service-contracts": "^2.5|^3"
+            },
+            "conflict": {
+                "amphp/amp": "<2.5",
+                "amphp/socket": "<1.1",
+                "php-http/discovery": "<1.15",
+                "symfony/http-foundation": "<6.4"
+            },
+            "provide": {
+                "php-http/async-client-implementation": "*",
+                "php-http/client-implementation": "*",
+                "psr/http-client-implementation": "1.0",
+                "symfony/http-client-implementation": "3.0"
+            },
+            "require-dev": {
+                "amphp/http-client": "^4.2.1|^5.0",
+                "amphp/http-tunnel": "^1.0|^2.0",
+                "guzzlehttp/promises": "^1.4|^2.0",
+                "nyholm/psr7": "^1.0",
+                "php-http/httplug": "^1.0|^2.0",
+                "psr/http-client": "^1.0",
+                "symfony/amphp-http-client-meta": "^1.0|^2.0",
+                "symfony/cache": "^6.4|^7.0|^8.0",
+                "symfony/dependency-injection": "^6.4|^7.0|^8.0",
+                "symfony/http-kernel": "^6.4|^7.0|^8.0",
+                "symfony/messenger": "^6.4|^7.0|^8.0",
+                "symfony/process": "^6.4|^7.0|^8.0",
+                "symfony/rate-limiter": "^6.4|^7.0|^8.0",
+                "symfony/stopwatch": "^6.4|^7.0|^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\HttpClient\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Provides powerful methods to fetch HTTP resources synchronously or asynchronously",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "http"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/http-client/tree/v7.4.5"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2026-01-27T16:16:02+00:00"
+        },
+        {
+            "name": "symfony/http-client-contracts",
+            "version": "v3.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/http-client-contracts.git",
+                "reference": "75d7043853a42837e68111812f4d964b01e5101c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/http-client-contracts/zipball/75d7043853a42837e68111812f4d964b01e5101c",
+                "reference": "75d7043853a42837e68111812f4d964b01e5101c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "type": "library",
+            "extra": {
+                "thanks": {
+                    "url": "https://github.com/symfony/contracts",
+                    "name": "symfony/contracts"
+                },
+                "branch-alias": {
+                    "dev-main": "3.6-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Contracts\\HttpClient\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Test/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Generic abstractions related to HTTP clients",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "abstractions",
+                "contracts",
+                "decoupling",
+                "interfaces",
+                "interoperability",
+                "standards"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/http-client-contracts/tree/v3.6.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-04-29T11:18:49+00:00"
+        },
         {
             "name": "symfony/polyfill-ctype",
             "version": "v1.33.0",
@@ -241,6 +726,173 @@
             ],
             "time": "2024-12-23T08:48:59+00:00"
         },
+        {
+            "name": "symfony/polyfill-php83",
+            "version": "v1.33.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-php83.git",
+                "reference": "17f6f9a6b1735c0f163024d959f700cfbc5155e5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-php83/zipball/17f6f9a6b1735c0f163024d959f700cfbc5155e5",
+                "reference": "17f6f9a6b1735c0f163024d959f700cfbc5155e5",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.2"
+            },
+            "type": "library",
+            "extra": {
+                "thanks": {
+                    "url": "https://github.com/symfony/polyfill",
+                    "name": "symfony/polyfill"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Polyfill\\Php83\\": ""
+                },
+                "classmap": [
+                    "Resources/stubs"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill backporting some PHP 8.3+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-php83/tree/v1.33.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-07-08T02:45:35+00:00"
+        },
+        {
+            "name": "symfony/service-contracts",
+            "version": "v3.6.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/service-contracts.git",
+                "reference": "45112560a3ba2d715666a509a0bc9521d10b6c43"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/45112560a3ba2d715666a509a0bc9521d10b6c43",
+                "reference": "45112560a3ba2d715666a509a0bc9521d10b6c43",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1",
+                "psr/container": "^1.1|^2.0",
+                "symfony/deprecation-contracts": "^2.5|^3"
+            },
+            "conflict": {
+                "ext-psr": "<1.1|>=2"
+            },
+            "type": "library",
+            "extra": {
+                "thanks": {
+                    "url": "https://github.com/symfony/contracts",
+                    "name": "symfony/contracts"
+                },
+                "branch-alias": {
+                    "dev-main": "3.6-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Contracts\\Service\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Test/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Generic abstractions related to writing services",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "abstractions",
+                "contracts",
+                "decoupling",
+                "interfaces",
+                "interoperability",
+                "standards"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/service-contracts/tree/v3.6.1"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-07-15T11:30:57+00:00"
+        },
         {
             "name": "twig/twig",
             "version": "v3.23.0",

includes/Frontend/Ajax.php

@@ -7,6 +7,8 @@
 
 namespace WP_FediStream\Frontend;
 
+use WP_FediStream\License\Manager as LicenseManager;
+
 // Prevent direct file access.
 if ( ! defined( 'ABSPATH' ) ) {
     exit;
@@ -36,6 +38,11 @@ class Ajax {
      * @return void
      */
     public function get_track(): void {
+        // Check license.
+        if ( ! LicenseManager::is_license_valid() ) {
+            wp_send_json_error( array( 'message' => __( 'This feature requires a valid license.', 'wp-fedistream' ) ) );
+        }
+
         // Verify nonce.
         if ( ! isset( $_POST['nonce'] ) || ! wp_verify_nonce( sanitize_key( $_POST['nonce'] ), 'wp-fedistream-nonce' ) ) {
             wp_send_json_error( array( 'message' => __( 'Invalid nonce.', 'wp-fedistream' ) ) );
@@ -125,6 +132,11 @@ class Ajax {
      * @return void
      */
     public function record_play(): void {
+        // Check license.
+        if ( ! LicenseManager::is_license_valid() ) {
+            wp_send_json_error( array( 'message' => __( 'This feature requires a valid license.', 'wp-fedistream' ) ) );
+        }
+
         // Verify nonce.
         if ( ! isset( $_POST['nonce'] ) || ! wp_verify_nonce( sanitize_key( $_POST['nonce'] ), 'wp-fedistream-nonce' ) ) {
             wp_send_json_error( array( 'message' => __( 'Invalid nonce.', 'wp-fedistream' ) ) );

includes/Frontend/Shortcodes.php

@@ -27,13 +27,35 @@ class Shortcodes {
     private Plugin $plugin;
 
     /**
-     * Constructor.
+     * Whether running in unlicensed mode.
+     *
+     * @var bool
      */
-    public function __construct() {
+    private bool $unlicensed_mode = false;
-        $this->plugin = Plugin::get_instance();
+
+    /**
+     * Constructor.
+     *
+     * @param bool $unlicensed_mode Whether to run in unlicensed mode.
+     */
+    public function __construct( bool $unlicensed_mode = false ) {
+        $this->plugin          = Plugin::get_instance();
+        $this->unlicensed_mode = $unlicensed_mode;
         $this->register_shortcodes();
     }
 
+    /**
+     * Get the unlicensed message HTML.
+     *
+     * @return string
+     */
+    private function get_unlicensed_message(): string {
+        return '<div class="fedistream-unlicensed-notice" style="padding: 20px; background: #f0f0f1; border-left: 4px solid #dba617; margin: 10px 0;">'
+            . '<p style="margin: 0; color: #50575e;">'
+            . esc_html__( 'This content requires a valid FediStream license.', 'wp-fedistream' )
+            . '</p></div>';
+    }
+
     /**
      * Register all shortcodes.
      *
@@ -59,6 +81,9 @@ class Shortcodes {
      * @return string
      */
     public function render_artist( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
         $atts = shortcode_atts(
             array(
                 'id'          => 0,
@@ -73,6 +98,7 @@ class Shortcodes {
 
         $post = $this->get_post( $atts, 'fedistream_artist' );
         if ( ! $post ) {
+            TemplateLoader::exit_shortcode_context();
             return '';
         }
 
@@ -97,6 +123,9 @@ class Shortcodes {
      * @return string
      */
     public function render_album( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
         $atts = shortcode_atts(
             array(
                 'id'          => 0,
@@ -110,6 +139,7 @@ class Shortcodes {
 
         $post = $this->get_post( $atts, 'fedistream_album' );
         if ( ! $post ) {
+            TemplateLoader::exit_shortcode_context();
             return '';
         }
 
@@ -133,6 +163,9 @@ class Shortcodes {
      * @return string
      */
     public function render_track( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
         $atts = shortcode_atts(
             array(
                 'id'          => 0,
@@ -146,6 +179,7 @@ class Shortcodes {
 
         $post = $this->get_post( $atts, 'fedistream_track' );
         if ( ! $post ) {
+            TemplateLoader::exit_shortcode_context();
             return '';
         }
 
@@ -169,6 +203,9 @@ class Shortcodes {
      * @return string
      */
     public function render_playlist( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
         $atts = shortcode_atts(
             array(
                 'id'          => 0,
@@ -182,6 +219,7 @@ class Shortcodes {
 
         $post = $this->get_post( $atts, 'fedistream_playlist' );
         if ( ! $post ) {
+            TemplateLoader::exit_shortcode_context();
             return '';
         }
 
@@ -205,6 +243,9 @@ class Shortcodes {
      * @return string
      */
     public function render_latest_releases( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
         $atts = shortcode_atts(
             array(
                 'count'   => 6,
@@ -270,6 +311,9 @@ class Shortcodes {
      * @return string
      */
     public function render_popular_tracks( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
         $atts = shortcode_atts(
             array(
                 'count'   => 10,
@@ -337,6 +381,9 @@ class Shortcodes {
      * @return string
      */
     public function render_artists_grid( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
         $atts = shortcode_atts(
             array(
                 'count'   => 12,
@@ -404,6 +451,9 @@ class Shortcodes {
      * @return string
      */
     public function render_player( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
         $atts = shortcode_atts(
             array(
                 'track'    => 0,
@@ -449,6 +499,7 @@ class Shortcodes {
         }
 
         if ( empty( $tracks ) ) {
+            TemplateLoader::exit_shortcode_context();
             return '';
         }
 
@@ -501,13 +552,31 @@ class Shortcodes {
      * @return string
      */
     private function render_template( string $template, array $context ): string {
+        // Block shortcode rendering while loading page template to prevent recursion.
+        // This catches any shortcodes triggered by theme header/footer, widgets, etc.
+        if ( TemplateLoader::is_loading_page_template() ) {
+            return '<!-- FediStream: shortcode blocked during page template loading -->';
+        }
+
+        // Check for unlicensed mode.
+        if ( $this->unlicensed_mode ) {
+            return $this->get_unlicensed_message();
+        }
+
+        // Enter shortcode context to prevent recursive shortcode processing.
+        TemplateLoader::enter_shortcode_context();
+
         try {
-            return $this->plugin->render( $template, $context );
+            $result = $this->plugin->render( $template, $context );
         } catch ( \Exception $e ) {
+            TemplateLoader::exit_shortcode_context();
             if ( WP_DEBUG ) {
                 return '<p class="fedistream-error">' . esc_html( $e->getMessage() ) . '</p>';
             }
             return '';
         }
+
+        TemplateLoader::exit_shortcode_context();
+        return $result;
     }
 }

includes/Frontend/TemplateLoader.php

@@ -21,6 +21,96 @@ if ( ! defined( 'ABSPATH' ) ) {
  */
 class TemplateLoader {
 
+    /**
+     * Recursion depth for get_post_data calls.
+     *
+     * @var int
+     */
+    private static int $recursion_depth = 0;
+
+    /**
+     * Maximum allowed recursion depth.
+     *
+     * @var int
+     */
+    private const MAX_RECURSION_DEPTH = 3;
+
+    /**
+     * Shortcode rendering context depth counter.
+     * When > 0, the_content filter is skipped to prevent recursive shortcode processing.
+     * Using a counter instead of boolean to handle nested shortcodes properly.
+     *
+     * @var int
+     */
+    private static int $shortcode_context_depth = 0;
+
+    /**
+     * Flag indicating we're currently loading a FediStream page template.
+     * This completely blocks any nested FediStream shortcode rendering.
+     *
+     * @var bool
+     */
+    private static bool $loading_page_template = false;
+
+    /**
+     * Enter page template loading mode.
+     * This blocks ALL shortcode rendering during page template loading.
+     *
+     * @return void
+     */
+    public static function enter_page_template_loading(): void {
+        self::$loading_page_template = true;
+    }
+
+    /**
+     * Exit page template loading mode.
+     *
+     * @return void
+     */
+    public static function exit_page_template_loading(): void {
+        self::$loading_page_template = false;
+    }
+
+    /**
+     * Check if we're loading a page template.
+     *
+     * @return bool
+     */
+    public static function is_loading_page_template(): bool {
+        return self::$loading_page_template;
+    }
+
+    /**
+     * Enter shortcode rendering context.
+     * Call this before rendering shortcode content to prevent recursive shortcode processing.
+     *
+     * @return void
+     */
+    public static function enter_shortcode_context(): void {
+        ++self::$shortcode_context_depth;
+    }
+
+    /**
+     * Exit shortcode rendering context.
+     * Call this after shortcode rendering is complete.
+     *
+     * @return void
+     */
+    public static function exit_shortcode_context(): void {
+        if ( self::$shortcode_context_depth > 0 ) {
+            --self::$shortcode_context_depth;
+        }
+    }
+
+    /**
+     * Check if we're in a shortcode rendering context.
+     *
+     * @return bool
+     */
+    public static function is_in_shortcode_context(): bool {
+        return self::$shortcode_context_depth > 0;
+    }
+
     /**
      * Constructor.
      */
@@ -191,34 +281,69 @@ class TemplateLoader {
     /**
      * Get post data for template.
      *
-     * @param \WP_Post $post Post object.
+     * @param \WP_Post $post       Post object.
+     * @param bool     $skip_nested Whether to skip loading nested items (albums, tracks, etc.).
      * @return array Post data.
      */
-    public static function get_post_data( \WP_Post $post ): array {
+    public static function get_post_data( \WP_Post $post, bool $skip_nested = false ): array {
+        // Track recursion to prevent infinite loops from shortcodes in content.
+        ++self::$recursion_depth;
+
+        // 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)
+        // 3. We're loading a page template
+        $skip_content_filter = self::$shortcode_context_depth > 0
+            || self::$recursion_depth > 1
+            || self::$loading_page_template;
+
+        // When skipping content filter, use raw excerpt to avoid get_the_excerpt()
+        // triggering the_content filter internally when generating auto-excerpts.
+        if ( $skip_content_filter ) {
+            $excerpt = $post->post_excerpt;
+            if ( empty( $excerpt ) ) {
+                // Generate a simple excerpt without triggering the_content filter.
+                $excerpt = wp_trim_words( wp_strip_all_tags( $post->post_content ), 55, '…' );
+            }
+        } else {
+            $excerpt = get_the_excerpt( $post );
+        }
+
+        // When skipping content filter, strip shortcodes to prevent them from
+        // being processed by anything else that might call do_shortcode on the output.
+        if ( $skip_content_filter ) {
+            $content = strip_shortcodes( $post->post_content );
+            $content = wp_kses_post( $content );
+        } else {
+            $content = apply_filters( 'the_content', $post->post_content );
+        }
+
         $data = array(
             'id'        => $post->ID,
             'title'     => get_the_title( $post ),
-            'content'   => apply_filters( 'the_content', $post->post_content ),
+            'content'   => $content,
-            'excerpt'   => get_the_excerpt( $post ),
+            'excerpt'   => $excerpt,
             'permalink' => get_permalink( $post ),
             'thumbnail' => get_the_post_thumbnail_url( $post->ID, 'large' ),
             'date'      => get_the_date( '', $post ),
             'author'    => get_the_author_meta( 'display_name', $post->post_author ),
         );
 
-        // Add post type specific data.
+        // Add post type specific data (skip nested items if at max depth).
+        $load_nested = ! $skip_nested && self::$recursion_depth < self::MAX_RECURSION_DEPTH;
+
         switch ( $post->post_type ) {
             case 'fedistream_artist':
-                $data = array_merge( $data, self::get_artist_data( $post->ID ) );
+                $data = array_merge( $data, self::get_artist_data( $post->ID, $load_nested ) );
                 break;
             case 'fedistream_album':
-                $data = array_merge( $data, self::get_album_data( $post->ID ) );
+                $data = array_merge( $data, self::get_album_data( $post->ID, $load_nested ) );
                 break;
             case 'fedistream_track':
                 $data = array_merge( $data, self::get_track_data( $post->ID ) );
                 break;
             case 'fedistream_playlist':
-                $data = array_merge( $data, self::get_playlist_data( $post->ID ) );
+                $data = array_merge( $data, self::get_playlist_data( $post->ID, $load_nested ) );
                 break;
         }
 
@@ -226,16 +351,23 @@ class TemplateLoader {
         $data['genres'] = self::get_terms( $post->ID, 'fedistream_genre' );
         $data['moods']  = self::get_terms( $post->ID, 'fedistream_mood' );
 
+        --self::$recursion_depth;
+
         return $data;
     }
 
     /**
      * Get artist-specific data.
      *
-     * @param int $post_id Post ID.
+     * @param int|\WP_Post $post_id     Post ID or WP_Post object.
+     * @param bool         $load_nested Whether to load nested albums.
      * @return array Artist data.
      */
-    private static function get_artist_data( int $post_id ): array {
+    public static function get_artist_data( int|\WP_Post $post_id, bool $load_nested = true ): array {
+        // Support both post ID and WP_Post object.
+        if ( $post_id instanceof \WP_Post ) {
+            $post_id = $post_id->ID;
+        }
         $type    = get_post_meta( $post_id, '_fedistream_artist_type', true ) ?: 'solo';
         $types   = array(
             'solo'       => __( 'Solo Artist', 'wp-fedistream' ),
@@ -244,23 +376,48 @@ class TemplateLoader {
             'collective' => __( 'Collective', 'wp-fedistream' ),
         );
 
-        $albums = get_posts(
+        $albums      = array();
-            array(
+        $album_count = 0;
-                'post_type'      => 'fedistream_album',
+
-                'posts_per_page' => -1,
+        if ( $load_nested ) {
-                'post_status'    => 'publish',
+            $album_posts = get_posts(
-                'meta_key'       => '_fedistream_album_artist',
+                array(
-                'meta_value'     => $post_id,
+                    'post_type'      => 'fedistream_album',
-                'orderby'        => 'meta_value',
+                    'posts_per_page' => -1,
-                'meta_query'     => array(
+                    'post_status'    => 'publish',
-                    array(
+                    'meta_key'       => '_fedistream_album_artist',
-                        'key'     => '_fedistream_album_release_date',
+                    'meta_value'     => $post_id,
-                        'compare' => 'EXISTS',
+                    'orderby'        => 'meta_value',
+                    'meta_query'     => array(
+                        array(
+                            'key'     => '_fedistream_album_release_date',
+                            'compare' => 'EXISTS',
+                        ),
                     ),
-                ),
+                    'order'          => 'DESC',
-                'order'          => 'DESC',
+                )
-            )
+            );
-        );
+            $album_count = count( $album_posts );
+            $albums      = array_map(
+                function ( $album ) {
+                    return self::get_post_data( $album, true ); // Skip further nesting.
+                },
+                $album_posts
+            );
+        } else {
+            // Just get the count without loading full data.
+            $album_count = (int) get_posts(
+                array(
+                    'post_type'      => 'fedistream_album',
+                    'posts_per_page' => -1,
+                    'post_status'    => 'publish',
+                    'meta_key'       => '_fedistream_album_artist',
+                    'meta_value'     => $post_id,
+                    'fields'         => 'ids',
+                )
+            );
+            $album_count = is_array( $album_count ) ? count( $album_count ) : 0;
+        }
 
         return array(
             'artist_type'       => $type,
@@ -270,18 +427,23 @@ class TemplateLoader {
             'website'           => get_post_meta( $post_id, '_fedistream_artist_website', true ),
             'social_links'      => get_post_meta( $post_id, '_fedistream_artist_social_links', true ) ?: array(),
             'members'           => get_post_meta( $post_id, '_fedistream_artist_members', true ) ?: array(),
-            'albums'            => array_map( array( __CLASS__, 'get_post_data' ), $albums ),
+            'albums'            => $albums,
-            'album_count'       => count( $albums ),
+            'album_count'       => $album_count,
         );
     }
 
     /**
      * Get album-specific data.
      *
-     * @param int $post_id Post ID.
+     * @param int|\WP_Post $post_id     Post ID or WP_Post object.
+     * @param bool         $load_nested Whether to load nested tracks.
      * @return array Album data.
      */
-    private static function get_album_data( int $post_id ): array {
+    public static function get_album_data( int|\WP_Post $post_id, bool $load_nested = true ): array {
+        // Support both post ID and WP_Post object.
+        if ( $post_id instanceof \WP_Post ) {
+            $post_id = $post_id->ID;
+        }
         $type      = get_post_meta( $post_id, '_fedistream_album_type', true ) ?: 'album';
         $types     = array(
             'album'       => __( 'Album', 'wp-fedistream' ),
@@ -293,24 +455,49 @@ class TemplateLoader {
         );
         $artist_id = get_post_meta( $post_id, '_fedistream_album_artist', true );
 
-        $tracks = get_posts(
+        $tracks       = array();
-            array(
+        $total_tracks = 0;
-                'post_type'      => 'fedistream_track',
+
-                'posts_per_page' => -1,
+        if ( $load_nested ) {
-                'post_status'    => 'publish',
+            $track_posts = get_posts(
-                'meta_key'       => '_fedistream_track_album',
+                array(
-                'meta_value'     => $post_id,
+                    'post_type'      => 'fedistream_track',
-                'orderby'        => 'meta_value_num',
+                    'posts_per_page' => -1,
-                'meta_query'     => array(
+                    'post_status'    => 'publish',
-                    'relation' => 'AND',
+                    'meta_key'       => '_fedistream_track_album',
-                    array(
+                    'meta_value'     => $post_id,
-                        'key'     => '_fedistream_track_number',
+                    'orderby'        => 'meta_value_num',
-                        'compare' => 'EXISTS',
+                    'meta_query'     => array(
+                        'relation' => 'AND',
+                        array(
+                            'key'     => '_fedistream_track_number',
+                            'compare' => 'EXISTS',
+                        ),
                     ),
-                ),
+                    'order'          => 'ASC',
-                'order'          => 'ASC',
+                )
-            )
+            );
-        );
+            $total_tracks = count( $track_posts );
+            $tracks       = array_map(
+                function ( $track ) {
+                    return self::get_post_data( $track, true ); // Skip further nesting.
+                },
+                $track_posts
+            );
+        } else {
+            // Just get the count without loading full data.
+            $track_ids    = get_posts(
+                array(
+                    'post_type'      => 'fedistream_track',
+                    'posts_per_page' => -1,
+                    'post_status'    => 'publish',
+                    'meta_key'       => '_fedistream_track_album',
+                    'meta_value'     => $post_id,
+                    'fields'         => 'ids',
+                )
+            );
+            $total_tracks = is_array( $track_ids ) ? count( $track_ids ) : 0;
+        }
 
         return array(
             'album_type'       => $type,
@@ -322,19 +509,23 @@ class TemplateLoader {
             'artist_url'       => $artist_id ? get_permalink( $artist_id ) : '',
             'upc'              => get_post_meta( $post_id, '_fedistream_album_upc', true ),
             'catalog_number'   => get_post_meta( $post_id, '_fedistream_album_catalog_number', true ),
-            'total_tracks'     => count( $tracks ),
+            'total_tracks'     => $total_tracks,
             'total_duration'   => (int) get_post_meta( $post_id, '_fedistream_album_total_duration', true ),
-            'tracks'           => array_map( array( __CLASS__, 'get_post_data' ), $tracks ),
+            'tracks'           => $tracks,
         );
     }
 
     /**
      * Get track-specific data.
      *
-     * @param int $post_id Post ID.
+     * @param int|\WP_Post $post_id Post ID or WP_Post object.
      * @return array Track data.
      */
-    private static function get_track_data( int $post_id ): array {
+    public static function get_track_data( int|\WP_Post $post_id ): array {
+        // Support both post ID and WP_Post object.
+        if ( $post_id instanceof \WP_Post ) {
+            $post_id = $post_id->ID;
+        }
         $album_id   = get_post_meta( $post_id, '_fedistream_track_album', true );
         $audio_file = get_post_meta( $post_id, '_fedistream_track_audio_file', true );
         $artists    = get_post_meta( $post_id, '_fedistream_track_artists', true ) ?: array();
@@ -374,16 +565,21 @@ class TemplateLoader {
     /**
      * Get playlist-specific data.
      *
-     * @param int $post_id Post ID.
+     * @param int|\WP_Post $post_id     Post ID or WP_Post object.
+     * @param bool         $load_nested Whether to load nested tracks.
      * @return array Playlist data.
      */
-    private static function get_playlist_data( int $post_id ): array {
+    public static function get_playlist_data( int|\WP_Post $post_id, bool $load_nested = true ): array {
+        // Support both post ID and WP_Post object.
+        if ( $post_id instanceof \WP_Post ) {
+            $post_id = $post_id->ID;
+        }
         global $wpdb;
 
-        $table   = $wpdb->prefix . 'fedistream_playlist_tracks';
+        $table    = $wpdb->prefix . 'fedistream_playlist_tracks';
         $duration = (int) get_post_meta( $post_id, '_fedistream_playlist_total_duration', true );
 
-        // Get tracks.
+        // Get track IDs.
         // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
         $track_ids = $wpdb->get_col(
             $wpdb->prepare(
@@ -392,11 +588,15 @@ class TemplateLoader {
             )
         );
 
-        $tracks = array();
+        $tracks      = array();
-        foreach ( $track_ids as $track_id ) {
+        $track_count = count( $track_ids );
-            $track = get_post( $track_id );
+
-            if ( $track && 'publish' === $track->post_status ) {
+        if ( $load_nested && ! empty( $track_ids ) ) {
-                $tracks[] = self::get_post_data( $track );
+            foreach ( $track_ids as $track_id ) {
+                $track = get_post( $track_id );
+                if ( $track && 'publish' === $track->post_status ) {
+                    $tracks[] = self::get_post_data( $track, true ); // Skip further nesting.
+                }
             }
         }
 
@@ -404,7 +604,7 @@ class TemplateLoader {
             'visibility'         => get_post_meta( $post_id, '_fedistream_playlist_visibility', true ) ?: 'public',
             'collaborative'      => (bool) get_post_meta( $post_id, '_fedistream_playlist_collaborative', true ),
             'federated'          => (bool) get_post_meta( $post_id, '_fedistream_playlist_federated', true ),
-            'track_count'        => count( $tracks ),
+            'track_count'        => $load_nested ? count( $tracks ) : $track_count,
             'total_duration'     => $duration,
             'duration_formatted' => $duration >= 3600
                 ? sprintf( '%d:%02d:%02d', floor( $duration / 3600 ), floor( ( $duration % 3600 ) / 60 ), $duration % 60 )

includes/Frontend/template-wrapper.php

@@ -13,6 +13,12 @@ if ( ! defined( 'ABSPATH' ) ) {
 use WP_FediStream\Plugin;
 use WP_FediStream\Frontend\TemplateLoader;
 
+// Enter page template loading mode - this completely blocks nested FediStream rendering.
+TemplateLoader::enter_page_template_loading();
+
+// Also enter shortcode context to prevent recursive shortcode processing in post content.
+TemplateLoader::enter_shortcode_context();
+
 // Get template context.
 $context = TemplateLoader::get_context();
 
@@ -54,7 +60,8 @@ get_header();
     if ( $template_name ) {
         try {
             // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
-            echo $plugin->render( $template_name, $context );
+            // Pass true for is_main_template to set the hard rendering lock.
+            echo $plugin->render( $template_name, $context, true );
         } catch ( \Exception $e ) {
             if ( WP_DEBUG ) {
                 echo '<div class="fedistream-error">';
@@ -75,4 +82,8 @@ get_header();
 </main>
 
 <?php
+// Exit shortcode context and page template loading mode.
+TemplateLoader::exit_shortcode_context();
+TemplateLoader::exit_page_template_loading();
+
 get_footer();

includes/Installer.php

@@ -345,11 +345,18 @@ class Installer {
      */
     private static function set_default_options(): void {
         $defaults = array(
-            'wp_fedistream_enable_activitypub' => 1,
+            'wp_fedistream_enable_activitypub'       => 1,
-            'wp_fedistream_enable_woocommerce' => 0,
+            'wp_fedistream_enable_woocommerce'       => 0,
-            'wp_fedistream_audio_formats'      => array( 'mp3', 'wav', 'flac', 'ogg' ),
+            'wp_fedistream_audio_formats'            => array( 'mp3', 'wav', 'flac', 'ogg' ),
-            'wp_fedistream_max_upload_size'    => 50, // MB
+            'wp_fedistream_max_upload_size'          => 50, // MB
-            'wp_fedistream_default_license'    => 'all-rights-reserved',
+            'wp_fedistream_default_license'          => 'all-rights-reserved',
+            // License management options.
+            'wp_fedistream_license_key'              => '',
+            'wp_fedistream_license_server_url'       => '',
+            'wp_fedistream_license_server_secret'    => '',
+            'wp_fedistream_license_status'           => 'unchecked',
+            'wp_fedistream_license_data'             => array(),
+            'wp_fedistream_license_last_check'       => 0,
         );
 
         foreach ( $defaults as $option => $value ) {

includes/License/Manager.php

@@ -0,0 +1,653 @@
+<?php
+/**
+ * License management class.
+ *
+ * Wraps the wc-licensed-product-client library for WordPress integration.
+ *
+ * @package WP_FediStream
+ */
+
+namespace WP_FediStream\License;
+
+use Magdev\WcLicensedProductClient\SecureLicenseClient;
+use Magdev\WcLicensedProductClient\Dto\LicenseInfo;
+use Magdev\WcLicensedProductClient\Dto\LicenseStatus;
+use Magdev\WcLicensedProductClient\Dto\LicenseState;
+use Magdev\WcLicensedProductClient\Dto\ActivationResult;
+use Magdev\WcLicensedProductClient\Exception\LicenseException;
+use Magdev\WcLicensedProductClient\Exception\LicenseNotFoundException;
+use Magdev\WcLicensedProductClient\Exception\LicenseExpiredException;
+use Magdev\WcLicensedProductClient\Exception\LicenseInvalidException;
+use Magdev\WcLicensedProductClient\Exception\LicenseRevokedException;
+use Magdev\WcLicensedProductClient\Exception\LicenseInactiveException;
+use Magdev\WcLicensedProductClient\Exception\DomainMismatchException;
+use Magdev\WcLicensedProductClient\Exception\MaxActivationsReachedException;
+use Magdev\WcLicensedProductClient\Exception\RateLimitExceededException;
+use Magdev\WcLicensedProductClient\Security\SignatureException;
+use Symfony\Component\HttpClient\HttpClient;
+
+// Prevent direct file access.
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * License Manager class.
+ *
+ * Handles license validation, activation, and status checking.
+ */
+final class Manager {
+
+	/**
+	 * Option names for license settings.
+	 */
+	public const OPTION_LICENSE_KEY     = 'wp_fedistream_license_key';
+	public const OPTION_SERVER_URL      = 'wp_fedistream_license_server_url';
+	public const OPTION_SERVER_SECRET   = 'wp_fedistream_license_server_secret';
+	public const OPTION_LICENSE_STATUS  = 'wp_fedistream_license_status';
+	public const OPTION_LICENSE_DATA    = 'wp_fedistream_license_data';
+	public const OPTION_LAST_CHECK      = 'wp_fedistream_license_last_check';
+
+	/**
+	 * Transient name for caching license validation.
+	 */
+	private const TRANSIENT_LICENSE_CHECK = 'wp_fedistream_license_check';
+
+	/**
+	 * Cache TTL in seconds (24 hours).
+	 */
+	private const CACHE_TTL = 86400;
+
+	/**
+	 * Singleton instance.
+	 *
+	 * @var Manager|null
+	 */
+	private static ?Manager $instance = null;
+
+	/**
+	 * License client instance.
+	 *
+	 * @var SecureLicenseClient|null
+	 */
+	private ?SecureLicenseClient $client = null;
+
+	/**
+	 * Get singleton instance.
+	 *
+	 * @return Manager
+	 */
+	public static function get_instance(): Manager {
+		if ( null === self::$instance ) {
+			self::$instance = new self();
+		}
+		return self::$instance;
+	}
+
+	/**
+	 * Private constructor.
+	 */
+	private function __construct() {
+		$this->init_hooks();
+	}
+
+	/**
+	 * Initialize WordPress hooks.
+	 *
+	 * @return void
+	 */
+	private function init_hooks(): void {
+		add_action( 'wp_ajax_fedistream_validate_license', array( $this, 'ajax_validate_license' ) );
+		add_action( 'wp_ajax_fedistream_activate_license', array( $this, 'ajax_activate_license' ) );
+		add_action( 'wp_ajax_fedistream_deactivate_license', array( $this, 'ajax_deactivate_license' ) );
+		add_action( 'wp_ajax_fedistream_check_license_status', array( $this, 'ajax_check_status' ) );
+	}
+
+	/**
+	 * Initialize the license client.
+	 *
+	 * @return bool True if client was initialized successfully.
+	 */
+	private function init_client(): bool {
+		if ( null !== $this->client ) {
+			return true;
+		}
+
+		$server_url    = self::get_server_url();
+		$server_secret = self::get_server_secret();
+
+		if ( empty( $server_url ) || empty( $server_secret ) ) {
+			return false;
+		}
+
+		try {
+			$this->client = new SecureLicenseClient(
+				httpClient: HttpClient::create(),
+				baseUrl: $server_url,
+				serverSecret: $server_secret,
+			);
+			return true;
+		} catch ( \Throwable $e ) {
+			return false;
+		}
+	}
+
+	/**
+	 * Validate the current license.
+	 *
+	 * @return array{success: bool, message: string, data?: array}
+	 */
+	public function validate(): array {
+		if ( ! $this->init_client() ) {
+			return array(
+				'success' => false,
+				'message' => __( 'License server configuration is incomplete.', 'wp-fedistream' ),
+			);
+		}
+
+		$license_key = self::get_license_key();
+		if ( empty( $license_key ) ) {
+			return array(
+				'success' => false,
+				'message' => __( 'No license key provided.', 'wp-fedistream' ),
+			);
+		}
+
+		$domain = wp_parse_url( home_url(), PHP_URL_HOST );
+
+		try {
+			$result = $this->client->validate( $license_key, $domain );
+
+			// Update cached status.
+			$this->update_cached_status( 'valid', array(
+				'product_id' => $result->productId,
+				'expires_at' => $result->expiresAt?->format( 'c' ),
+				'version_id' => $result->versionId,
+			) );
+
+			return array(
+				'success' => true,
+				'message' => __( 'License validated successfully.', 'wp-fedistream' ),
+				'data'    => array(
+					'status'     => 'valid',
+					'product_id' => $result->productId,
+					'expires_at' => $result->expiresAt?->format( 'Y-m-d' ),
+					'lifetime'   => $result->isLifetime(),
+				),
+			);
+		} catch ( LicenseNotFoundException $e ) {
+			$this->update_cached_status( 'invalid' );
+			return array(
+				'success' => false,
+				'message' => __( 'License key not found. Please check your license key.', 'wp-fedistream' ),
+			);
+		} catch ( LicenseExpiredException $e ) {
+			$this->update_cached_status( 'expired' );
+			return array(
+				'success' => false,
+				'message' => __( 'Your license has expired. Please renew to continue.', 'wp-fedistream' ),
+			);
+		} catch ( LicenseRevokedException $e ) {
+			$this->update_cached_status( 'revoked' );
+			return array(
+				'success' => false,
+				'message' => __( 'Your license has been revoked.', 'wp-fedistream' ),
+			);
+		} catch ( LicenseInactiveException $e ) {
+			$this->update_cached_status( 'inactive' );
+			return array(
+				'success' => false,
+				'message' => __( 'License is inactive. Please activate it first.', 'wp-fedistream' ),
+			);
+		} catch ( DomainMismatchException $e ) {
+			$this->update_cached_status( 'invalid' );
+			return array(
+				'success' => false,
+				'message' => __( 'This license is not activated for this domain.', 'wp-fedistream' ),
+			);
+		} catch ( SignatureException $e ) {
+			return array(
+				'success' => false,
+				'message' => __( 'License verification failed. Please check your server secret.', 'wp-fedistream' ),
+			);
+		} catch ( RateLimitExceededException $e ) {
+			return array(
+				'success' => false,
+				'message' => __( 'Too many requests. Please try again later.', 'wp-fedistream' ),
+			);
+		} catch ( LicenseException $e ) {
+			return array(
+				'success' => false,
+				'message' => sprintf(
+					/* translators: %s: Error message */
+					__( 'License validation failed: %s', 'wp-fedistream' ),
+					$e->getMessage()
+				),
+			);
+		} catch ( \Throwable $e ) {
+			return array(
+				'success' => false,
+				'message' => __( 'Unable to verify license. Please try again later.', 'wp-fedistream' ),
+			);
+		}
+	}
+
+	/**
+	 * Activate the license for this domain.
+	 *
+	 * @return array{success: bool, message: string, data?: array}
+	 */
+	public function activate(): array {
+		if ( ! $this->init_client() ) {
+			return array(
+				'success' => false,
+				'message' => __( 'License server configuration is incomplete.', 'wp-fedistream' ),
+			);
+		}
+
+		$license_key = self::get_license_key();
+		if ( empty( $license_key ) ) {
+			return array(
+				'success' => false,
+				'message' => __( 'No license key provided.', 'wp-fedistream' ),
+			);
+		}
+
+		$domain = wp_parse_url( home_url(), PHP_URL_HOST );
+
+		try {
+			$result = $this->client->activate( $license_key, $domain );
+
+			if ( $result->success ) {
+				// Validate after activation to get full license info.
+				return $this->validate();
+			}
+
+			return array(
+				'success' => false,
+				'message' => $result->message,
+			);
+		} catch ( MaxActivationsReachedException $e ) {
+			return array(
+				'success' => false,
+				'message' => __( 'Maximum number of activations reached. Please deactivate another site first.', 'wp-fedistream' ),
+			);
+		} catch ( LicenseNotFoundException $e ) {
+			return array(
+				'success' => false,
+				'message' => __( 'License key not found. Please check your license key.', 'wp-fedistream' ),
+			);
+		} catch ( LicenseExpiredException $e ) {
+			return array(
+				'success' => false,
+				'message' => __( 'Your license has expired. Please renew to continue.', 'wp-fedistream' ),
+			);
+		} catch ( SignatureException $e ) {
+			return array(
+				'success' => false,
+				'message' => __( 'License verification failed. Please check your server secret.', 'wp-fedistream' ),
+			);
+		} catch ( LicenseException $e ) {
+			return array(
+				'success' => false,
+				'message' => sprintf(
+					/* translators: %s: Error message */
+					__( 'License activation failed: %s', 'wp-fedistream' ),
+					$e->getMessage()
+				),
+			);
+		} catch ( \Throwable $e ) {
+			return array(
+				'success' => false,
+				'message' => __( 'Unable to activate license. Please try again later.', 'wp-fedistream' ),
+			);
+		}
+	}
+
+	/**
+	 * Get the current license status.
+	 *
+	 * @param bool $force_refresh Force a fresh check from the server.
+	 * @return array{success: bool, message: string, data?: array}
+	 */
+	public function get_status( bool $force_refresh = false ): array {
+		// Check cached status first.
+		if ( ! $force_refresh ) {
+			$cached = $this->get_cached_validation();
+			if ( null !== $cached ) {
+				return $cached;
+			}
+		}
+
+		if ( ! $this->init_client() ) {
+			return array(
+				'success' => false,
+				'message' => __( 'License server configuration is incomplete.', 'wp-fedistream' ),
+				'data'    => array(
+					'status' => 'unconfigured',
+				),
+			);
+		}
+
+		$license_key = self::get_license_key();
+		if ( empty( $license_key ) ) {
+			return array(
+				'success' => false,
+				'message' => __( 'No license key configured.', 'wp-fedistream' ),
+				'data'    => array(
+					'status' => 'unchecked',
+				),
+			);
+		}
+
+		try {
+			$result = $this->client->status( $license_key );
+
+			$status_map = array(
+				LicenseState::Active->value   => 'valid',
+				LicenseState::Inactive->value => 'inactive',
+				LicenseState::Expired->value  => 'expired',
+				LicenseState::Revoked->value  => 'revoked',
+			);
+
+			$status = $status_map[ $result->status->value ] ?? 'invalid';
+
+			$data = array(
+				'status'            => $status,
+				'valid'             => $result->valid,
+				'domain'            => $result->domain,
+				'expires_at'        => $result->expiresAt?->format( 'Y-m-d' ),
+				'lifetime'          => $result->isLifetime(),
+				'activations_count' => $result->activationsCount,
+				'max_activations'   => $result->maxActivations,
+			);
+
+			// Cache the result.
+			$this->cache_validation( array(
+				'success' => $result->valid,
+				'message' => $result->valid
+					? __( 'License is active.', 'wp-fedistream' )
+					: __( 'License is not active.', 'wp-fedistream' ),
+				'data'    => $data,
+			) );
+
+			$this->update_cached_status( $status, $data );
+
+			return array(
+				'success' => $result->valid,
+				'message' => $result->valid
+					? __( 'License is active.', 'wp-fedistream' )
+					: __( 'License is not active.', 'wp-fedistream' ),
+				'data'    => $data,
+			);
+		} catch ( LicenseNotFoundException $e ) {
+			$this->update_cached_status( 'invalid' );
+			return array(
+				'success' => false,
+				'message' => __( 'License key not found.', 'wp-fedistream' ),
+				'data'    => array(
+					'status' => 'invalid',
+				),
+			);
+		} catch ( SignatureException $e ) {
+			return array(
+				'success' => false,
+				'message' => __( 'License verification failed. Please check your server secret.', 'wp-fedistream' ),
+				'data'    => array(
+					'status' => 'error',
+				),
+			);
+		} catch ( \Throwable $e ) {
+			return array(
+				'success' => false,
+				'message' => __( 'Unable to check license status.', 'wp-fedistream' ),
+				'data'    => array(
+					'status' => 'error',
+				),
+			);
+		}
+	}
+
+	/**
+	 * Deactivate the license (clear local data).
+	 *
+	 * @return bool
+	 */
+	public function deactivate(): bool {
+		self::clear_license_data();
+		return true;
+	}
+
+	/**
+	 * Check if the license is currently valid.
+	 *
+	 * Uses cached status for performance.
+	 *
+	 * @return bool
+	 */
+	public static function is_license_valid(): bool {
+		$status = get_option( self::OPTION_LICENSE_STATUS, 'unchecked' );
+		return 'valid' === $status;
+	}
+
+	/**
+	 * Get the license key.
+	 *
+	 * @return string
+	 */
+	public static function get_license_key(): string {
+		return get_option( self::OPTION_LICENSE_KEY, '' );
+	}
+
+	/**
+	 * Get the license server URL.
+	 *
+	 * @return string
+	 */
+	public static function get_server_url(): string {
+		return get_option( self::OPTION_SERVER_URL, '' );
+	}
+
+	/**
+	 * Get the server secret.
+	 *
+	 * @return string
+	 */
+	public static function get_server_secret(): string {
+		return get_option( self::OPTION_SERVER_SECRET, '' );
+	}
+
+	/**
+	 * Get cached license status.
+	 *
+	 * @return string
+	 */
+	public static function get_cached_status(): string {
+		return get_option( self::OPTION_LICENSE_STATUS, 'unchecked' );
+	}
+
+	/**
+	 * Get cached license data.
+	 *
+	 * @return array
+	 */
+	public static function get_cached_data(): array {
+		return get_option( self::OPTION_LICENSE_DATA, array() );
+	}
+
+	/**
+	 * Get last check timestamp.
+	 *
+	 * @return int
+	 */
+	public static function get_last_check(): int {
+		return (int) get_option( self::OPTION_LAST_CHECK, 0 );
+	}
+
+	/**
+	 * Save license settings.
+	 *
+	 * @param array $data Settings data.
+	 * @return bool
+	 */
+	public static function save_settings( array $data ): bool {
+		if ( isset( $data['license_key'] ) ) {
+			update_option( self::OPTION_LICENSE_KEY, sanitize_text_field( $data['license_key'] ) );
+		}
+
+		if ( isset( $data['server_url'] ) ) {
+			update_option( self::OPTION_SERVER_URL, esc_url_raw( $data['server_url'] ) );
+		}
+
+		if ( isset( $data['server_secret'] ) ) {
+			// Only update if a new secret is provided.
+			$secret = sanitize_text_field( $data['server_secret'] );
+			if ( ! empty( $secret ) ) {
+				update_option( self::OPTION_SERVER_SECRET, $secret );
+			}
+		}
+
+		// Reset status when settings change.
+		update_option( self::OPTION_LICENSE_STATUS, 'unchecked' );
+		delete_transient( self::TRANSIENT_LICENSE_CHECK );
+
+		return true;
+	}
+
+	/**
+	 * Clear all license data.
+	 *
+	 * @return void
+	 */
+	public static function clear_license_data(): void {
+		update_option( self::OPTION_LICENSE_STATUS, 'unchecked' );
+		update_option( self::OPTION_LICENSE_DATA, array() );
+		update_option( self::OPTION_LAST_CHECK, 0 );
+		delete_transient( self::TRANSIENT_LICENSE_CHECK );
+	}
+
+	/**
+	 * Update cached license status.
+	 *
+	 * @param string $status Status value.
+	 * @param array  $data   Additional data.
+	 * @return void
+	 */
+	private function update_cached_status( string $status, array $data = array() ): void {
+		update_option( self::OPTION_LICENSE_STATUS, $status );
+		update_option( self::OPTION_LICENSE_DATA, $data );
+		update_option( self::OPTION_LAST_CHECK, time() );
+	}
+
+	/**
+	 * Cache validation result.
+	 *
+	 * @param array $result Validation result.
+	 * @return void
+	 */
+	private function cache_validation( array $result ): void {
+		set_transient( self::TRANSIENT_LICENSE_CHECK, $result, self::CACHE_TTL );
+	}
+
+	/**
+	 * Get cached validation result.
+	 *
+	 * @return array|null
+	 */
+	private function get_cached_validation(): ?array {
+		$cached = get_transient( self::TRANSIENT_LICENSE_CHECK );
+		return false === $cached ? null : $cached;
+	}
+
+	/**
+	 * AJAX handler: Validate license.
+	 *
+	 * @return void
+	 */
+	public function ajax_validate_license(): void {
+		check_ajax_referer( 'fedistream_license_action', 'nonce' );
+
+		if ( ! current_user_can( 'manage_fedistream_settings' ) ) {
+			wp_send_json_error( array(
+				'message' => __( 'You do not have permission to perform this action.', 'wp-fedistream' ),
+			) );
+		}
+
+		$result = $this->validate();
+
+		if ( $result['success'] ) {
+			wp_send_json_success( $result );
+		} else {
+			wp_send_json_error( $result );
+		}
+	}
+
+	/**
+	 * AJAX handler: Activate license.
+	 *
+	 * @return void
+	 */
+	public function ajax_activate_license(): void {
+		check_ajax_referer( 'fedistream_license_action', 'nonce' );
+
+		if ( ! current_user_can( 'manage_fedistream_settings' ) ) {
+			wp_send_json_error( array(
+				'message' => __( 'You do not have permission to perform this action.', 'wp-fedistream' ),
+			) );
+		}
+
+		$result = $this->activate();
+
+		if ( $result['success'] ) {
+			wp_send_json_success( $result );
+		} else {
+			wp_send_json_error( $result );
+		}
+	}
+
+	/**
+	 * AJAX handler: Deactivate license.
+	 *
+	 * @return void
+	 */
+	public function ajax_deactivate_license(): void {
+		check_ajax_referer( 'fedistream_license_action', 'nonce' );
+
+		if ( ! current_user_can( 'manage_fedistream_settings' ) ) {
+			wp_send_json_error( array(
+				'message' => __( 'You do not have permission to perform this action.', 'wp-fedistream' ),
+			) );
+		}
+
+		$this->deactivate();
+
+		wp_send_json_success( array(
+			'success' => true,
+			'message' => __( 'License deactivated.', 'wp-fedistream' ),
+		) );
+	}
+
+	/**
+	 * AJAX handler: Check license status.
+	 *
+	 * @return void
+	 */
+	public function ajax_check_status(): void {
+		check_ajax_referer( 'fedistream_license_action', 'nonce' );
+
+		if ( ! current_user_can( 'manage_fedistream_settings' ) ) {
+			wp_send_json_error( array(
+				'message' => __( 'You do not have permission to perform this action.', 'wp-fedistream' ),
+			) );
+		}
+
+		$force_refresh = isset( $_POST['force'] ) && 'true' === $_POST['force'];
+		$result        = $this->get_status( $force_refresh );
+
+		if ( $result['success'] ) {
+			wp_send_json_success( $result );
+		} else {
+			wp_send_json_error( $result );
+		}
+	}
+}

includes/Plugin.php

@@ -27,6 +27,7 @@ use WP_FediStream\Taxonomies\License;
 use WP_FediStream\User\Library as UserLibrary;
 use WP_FediStream\User\LibraryPage;
 use WP_FediStream\User\Notifications;
+use WP_FediStream\License\Manager as LicenseManager;
 
 // Prevent direct file access.
 if ( ! defined( 'ABSPATH' ) ) {
@@ -54,6 +55,29 @@ final class Plugin {
      */
     private ?\Twig\Environment $twig = null;
 
+    /**
+     * Current Twig render depth to prevent infinite recursion.
+     *
+     * @var int
+     */
+    private static int $render_depth = 0;
+
+    /**
+     * Maximum allowed Twig render depth.
+     * Set to 2 to allow one level of nested includes but prevent deeper recursion.
+     *
+     * @var int
+     */
+    private const MAX_RENDER_DEPTH = 2;
+
+    /**
+     * Flag to track if we're currently rendering the main page template.
+     * This is a hard lock that prevents ANY other rendering.
+     *
+     * @var bool
+     */
+    private static bool $rendering_main_template = false;
+
     /**
      * Post type instances.
      *
@@ -155,10 +179,13 @@ final class Plugin {
             new ListColumns();
         }
 
-        // Initialize frontend components.
+        // Initialize frontend components (only if licensed).
-        if ( ! is_admin() ) {
+        if ( ! is_admin() && LicenseManager::is_license_valid() ) {
             new TemplateLoader();
             new Shortcodes();
+        } elseif ( ! is_admin() ) {
+            // Register shortcodes that show license message.
+            new Shortcodes( true ); // Unlicensed mode.
         }
 
         // Initialize widgets (always needed for admin widget management).
@@ -167,8 +194,8 @@ final class Plugin {
         // Initialize AJAX handlers.
         new Ajax();
 
-        // Initialize ActivityPub integration.
+        // Initialize ActivityPub integration (only if licensed and enabled).
-        if ( get_option( 'wp_fedistream_enable_activitypub', 1 ) ) {
+        if ( get_option( 'wp_fedistream_enable_activitypub', 1 ) && LicenseManager::is_license_valid() ) {
             new ActivityPubIntegration();
             new ActivityPubRestApi();
         }
@@ -184,6 +211,9 @@ final class Plugin {
         new UserLibrary();
         new LibraryPage();
         new Notifications();
+
+        // Initialize license manager.
+        LicenseManager::get_instance();
     }
 
     /**
@@ -409,86 +439,334 @@ final class Plugin {
             return;
         }
 
-        // Save settings.
+        // Get current tab.
-        if ( isset( $_POST['fedistream_settings_nonce'] ) && wp_verify_nonce( sanitize_key( $_POST['fedistream_settings_nonce'] ), 'fedistream_save_settings' ) ) {
+        $current_tab = isset( $_GET['tab'] ) ? sanitize_key( $_GET['tab'] ) : 'license';
-            update_option( 'wp_fedistream_enable_activitypub', isset( $_POST['enable_activitypub'] ) ? 1 : 0 );
-            update_option( 'wp_fedistream_enable_woocommerce', isset( $_POST['enable_woocommerce'] ) ? 1 : 0 );
-            update_option( 'wp_fedistream_max_upload_size', absint( $_POST['max_upload_size'] ?? 50 ) );
-            update_option( 'wp_fedistream_default_license', sanitize_text_field( wp_unslash( $_POST['default_license'] ?? 'all-rights-reserved' ) ) );
 
-            echo '<div class="notice notice-success is-dismissible"><p>' . esc_html__( 'Settings saved.', 'wp-fedistream' ) . '</p></div>';
+        // Handle form submissions.
-        }
+        $this->handle_settings_save( $current_tab );
 
         // Get current settings.
         $enable_activitypub = get_option( 'wp_fedistream_enable_activitypub', 1 );
         $enable_woocommerce = get_option( 'wp_fedistream_enable_woocommerce', 0 );
         $max_upload_size    = get_option( 'wp_fedistream_max_upload_size', 50 );
         $default_license    = get_option( 'wp_fedistream_default_license', 'all-rights-reserved' );
+
+        // License settings.
+        $license_key        = LicenseManager::get_license_key();
+        $license_server_url = LicenseManager::get_server_url();
+        $license_status     = LicenseManager::get_cached_status();
+        $license_data       = LicenseManager::get_cached_data();
+        $last_check         = LicenseManager::get_last_check();
+
+        $tabs = array(
+            'license'      => __( 'License', 'wp-fedistream' ),
+            'settings'     => __( 'Default Settings', 'wp-fedistream' ),
+            'integrations' => __( 'Integrations', 'wp-fedistream' ),
+        );
         ?>
         <div class="wrap">
             <h1><?php esc_html_e( 'FediStream Settings', 'wp-fedistream' ); ?></h1>
 
-            <form method="post" action="">
+            <nav class="nav-tab-wrapper wp-clearfix">
-                <?php wp_nonce_field( 'fedistream_save_settings', 'fedistream_settings_nonce' ); ?>
+                <?php foreach ( $tabs as $tab_key => $tab_label ) : ?>
+                    <a href="<?php echo esc_url( admin_url( 'admin.php?page=fedistream-settings&tab=' . $tab_key ) ); ?>"
+                       class="nav-tab <?php echo $current_tab === $tab_key ? 'nav-tab-active' : ''; ?>">
+                        <?php echo esc_html( $tab_label ); ?>
+                    </a>
+                <?php endforeach; ?>
+            </nav>
 
-                <table class="form-table">
+            <div class="fedistream-settings-content">
-                    <tr>
+                <?php
-                        <th scope="row"><?php esc_html_e( 'ActivityPub Integration', 'wp-fedistream' ); ?></th>
+                switch ( $current_tab ) {
-                        <td>
+                    case 'license':
-                            <label>
+                        $this->render_license_tab( $license_key, $license_server_url, $license_status, $license_data, $last_check );
-                                <input type="checkbox" name="enable_activitypub" value="1" <?php checked( $enable_activitypub, 1 ); ?>>
+                        break;
-                                <?php esc_html_e( 'Enable ActivityPub features', 'wp-fedistream' ); ?>
+                    case 'settings':
-                            </label>
+                        $this->render_settings_tab( $max_upload_size, $default_license );
-                            <p class="description"><?php esc_html_e( 'Publish releases to the Fediverse and allow followers.', 'wp-fedistream' ); ?></p>
+                        break;
-                        </td>
+                    case 'integrations':
-                    </tr>
+                        $this->render_integrations_tab( $enable_activitypub, $enable_woocommerce );
-                    <tr>
+                        break;
-                        <th scope="row"><?php esc_html_e( 'WooCommerce Integration', 'wp-fedistream' ); ?></th>
+                }
-                        <td>
+                ?>
-                            <label>
+            </div>
-                                <input type="checkbox" name="enable_woocommerce" value="1" <?php checked( $enable_woocommerce, 1 ); ?> <?php disabled( ! $this->is_woocommerce_active() ); ?>>
-                                <?php esc_html_e( 'Enable WooCommerce features', 'wp-fedistream' ); ?>
-                            </label>
-                            <?php if ( ! $this->is_woocommerce_active() ) : ?>
-                                <p class="description" style="color: #d63638;"><?php esc_html_e( 'WooCommerce is not installed or active.', 'wp-fedistream' ); ?></p>
-                            <?php else : ?>
-                                <p class="description"><?php esc_html_e( 'Sell albums and tracks through WooCommerce.', 'wp-fedistream' ); ?></p>
-                            <?php endif; ?>
-                        </td>
-                    </tr>
-                    <tr>
-                        <th scope="row">
-                            <label for="max_upload_size"><?php esc_html_e( 'Max Upload Size', 'wp-fedistream' ); ?></label>
-                        </th>
-                        <td>
-                            <input type="number" name="max_upload_size" id="max_upload_size" value="<?php echo esc_attr( $max_upload_size ); ?>" min="1" max="500" class="small-text"> MB
-                            <p class="description"><?php esc_html_e( 'Maximum file size for audio uploads.', 'wp-fedistream' ); ?></p>
-                        </td>
-                    </tr>
-                    <tr>
-                        <th scope="row">
-                            <label for="default_license"><?php esc_html_e( 'Default License', 'wp-fedistream' ); ?></label>
-                        </th>
-                        <td>
-                            <select name="default_license" id="default_license">
-                                <option value="all-rights-reserved" <?php selected( $default_license, 'all-rights-reserved' ); ?>><?php esc_html_e( 'All Rights Reserved', 'wp-fedistream' ); ?></option>
-                                <option value="cc-by" <?php selected( $default_license, 'cc-by' ); ?>>CC BY</option>
-                                <option value="cc-by-sa" <?php selected( $default_license, 'cc-by-sa' ); ?>>CC BY-SA</option>
-                                <option value="cc-by-nc" <?php selected( $default_license, 'cc-by-nc' ); ?>>CC BY-NC</option>
-                                <option value="cc-by-nc-sa" <?php selected( $default_license, 'cc-by-nc-sa' ); ?>>CC BY-NC-SA</option>
-                                <option value="cc0" <?php selected( $default_license, 'cc0' ); ?>>CC0 (Public Domain)</option>
-                            </select>
-                            <p class="description"><?php esc_html_e( 'Default license for new uploads.', 'wp-fedistream' ); ?></p>
-                        </td>
-                    </tr>
-                </table>
-
-                <?php submit_button(); ?>
-            </form>
         </div>
         <?php
     }
 
+    /**
+     * Handle settings form submission.
+     *
+     * @param string $tab Current tab.
+     * @return void
+     */
+    private function handle_settings_save( string $tab ): void {
+        if ( ! isset( $_POST['fedistream_settings_nonce'] ) || ! wp_verify_nonce( sanitize_key( $_POST['fedistream_settings_nonce'] ), 'fedistream_save_settings' ) ) {
+            return;
+        }
+
+        switch ( $tab ) {
+            case 'license':
+                LicenseManager::save_settings( array(
+                    'license_key'   => isset( $_POST['license_key'] ) ? sanitize_text_field( wp_unslash( $_POST['license_key'] ) ) : '',
+                    'server_url'    => isset( $_POST['license_server_url'] ) ? esc_url_raw( wp_unslash( $_POST['license_server_url'] ) ) : '',
+                    'server_secret' => isset( $_POST['license_server_secret'] ) ? sanitize_text_field( wp_unslash( $_POST['license_server_secret'] ) ) : '',
+                ) );
+                echo '<div class="notice notice-success is-dismissible"><p>' . esc_html__( 'License settings saved.', 'wp-fedistream' ) . '</p></div>';
+                break;
+
+            case 'settings':
+                update_option( 'wp_fedistream_max_upload_size', absint( $_POST['max_upload_size'] ?? 50 ) );
+                update_option( 'wp_fedistream_default_license', sanitize_text_field( wp_unslash( $_POST['default_license'] ?? 'all-rights-reserved' ) ) );
+                echo '<div class="notice notice-success is-dismissible"><p>' . esc_html__( 'Settings saved.', 'wp-fedistream' ) . '</p></div>';
+                break;
+
+            case 'integrations':
+                update_option( 'wp_fedistream_enable_activitypub', isset( $_POST['enable_activitypub'] ) ? 1 : 0 );
+                update_option( 'wp_fedistream_enable_woocommerce', isset( $_POST['enable_woocommerce'] ) ? 1 : 0 );
+                echo '<div class="notice notice-success is-dismissible"><p>' . esc_html__( 'Integration settings saved.', 'wp-fedistream' ) . '</p></div>';
+                break;
+        }
+    }
+
+    /**
+     * Render the License tab.
+     *
+     * @param string $license_key   License key.
+     * @param string $server_url    Server URL.
+     * @param string $status        License status.
+     * @param array  $license_data  License data.
+     * @param int    $last_check    Last check timestamp.
+     * @return void
+     */
+    private function render_license_tab( string $license_key, string $server_url, string $status, array $license_data, int $last_check ): void {
+        $status_classes = array(
+            'valid'        => 'notice-success',
+            'invalid'      => 'notice-error',
+            'expired'      => 'notice-warning',
+            'revoked'      => 'notice-error',
+            'inactive'     => 'notice-warning',
+            'unchecked'    => 'notice-info',
+            'unconfigured' => 'notice-info',
+        );
+
+        $status_messages = array(
+            'valid'        => __( 'License is active and valid.', 'wp-fedistream' ),
+            'invalid'      => __( 'License is invalid.', 'wp-fedistream' ),
+            'expired'      => __( 'License has expired.', 'wp-fedistream' ),
+            'revoked'      => __( 'License has been revoked.', 'wp-fedistream' ),
+            'inactive'     => __( 'License is inactive. Please activate it.', 'wp-fedistream' ),
+            'unchecked'    => __( 'License has not been validated yet.', 'wp-fedistream' ),
+            'unconfigured' => __( 'License server is not configured.', 'wp-fedistream' ),
+        );
+
+        $status_icons = array(
+            'valid'        => 'dashicons-yes-alt',
+            'invalid'      => 'dashicons-dismiss',
+            'expired'      => 'dashicons-warning',
+            'revoked'      => 'dashicons-dismiss',
+            'inactive'     => 'dashicons-marker',
+            'unchecked'    => 'dashicons-info-outline',
+            'unconfigured' => 'dashicons-admin-generic',
+        );
+
+        $status_class   = $status_classes[ $status ] ?? 'notice-info';
+        $status_message = $status_messages[ $status ] ?? __( 'Unknown status.', 'wp-fedistream' );
+        $status_icon    = $status_icons[ $status ] ?? 'dashicons-info-outline';
+        ?>
+        <div class="fedistream-license-status notice <?php echo esc_attr( $status_class ); ?>" style="padding: 12px; display: flex; align-items: center; gap: 10px;">
+            <span class="dashicons <?php echo esc_attr( $status_icon ); ?>" style="font-size: 24px; width: 24px; height: 24px;"></span>
+            <div>
+                <strong><?php echo esc_html( $status_message ); ?></strong>
+                <?php if ( 'valid' === $status && ! empty( $license_data['expires_at'] ) ) : ?>
+                    <br>
+                    <span class="description">
+                        <?php
+                        printf(
+                            /* translators: %s: Expiration date */
+                            esc_html__( 'Expires: %s', 'wp-fedistream' ),
+                            esc_html( $license_data['expires_at'] )
+                        );
+                        ?>
+                    </span>
+                <?php elseif ( 'valid' === $status && empty( $license_data['expires_at'] ) ) : ?>
+                    <br>
+                    <span class="description"><?php esc_html_e( 'Lifetime license', 'wp-fedistream' ); ?></span>
+                <?php endif; ?>
+                <?php if ( $last_check > 0 ) : ?>
+                    <br>
+                    <span class="description">
+                        <?php
+                        printf(
+                            /* translators: %s: Time ago */
+                            esc_html__( 'Last checked: %s', 'wp-fedistream' ),
+                            esc_html( human_time_diff( $last_check, time() ) . ' ' . __( 'ago', 'wp-fedistream' ) )
+                        );
+                        ?>
+                    </span>
+                <?php endif; ?>
+            </div>
+        </div>
+
+        <form method="post" action="" id="fedistream-license-form">
+            <?php wp_nonce_field( 'fedistream_save_settings', 'fedistream_settings_nonce' ); ?>
+
+            <table class="form-table">
+                <tr>
+                    <th scope="row">
+                        <label for="license_server_url"><?php esc_html_e( 'License Server URL', 'wp-fedistream' ); ?></label>
+                    </th>
+                    <td>
+                        <input type="url" name="license_server_url" id="license_server_url"
+                               value="<?php echo esc_attr( $server_url ); ?>"
+                               class="regular-text" placeholder="https://example.com">
+                        <p class="description"><?php esc_html_e( 'The URL of your license server.', 'wp-fedistream' ); ?></p>
+                    </td>
+                </tr>
+                <tr>
+                    <th scope="row">
+                        <label for="license_key"><?php esc_html_e( 'License Key', 'wp-fedistream' ); ?></label>
+                    </th>
+                    <td>
+                        <input type="text" name="license_key" id="license_key"
+                               value="<?php echo esc_attr( $license_key ); ?>"
+                               class="regular-text" placeholder="XXXX-XXXX-XXXX-XXXX">
+                        <p class="description"><?php esc_html_e( 'Your license key from your purchase.', 'wp-fedistream' ); ?></p>
+                    </td>
+                </tr>
+                <tr>
+                    <th scope="row">
+                        <label for="license_server_secret"><?php esc_html_e( 'Server Secret', 'wp-fedistream' ); ?></label>
+                    </th>
+                    <td>
+                        <input type="password" name="license_server_secret" id="license_server_secret"
+                               value="" class="regular-text" placeholder="<?php echo esc_attr( ! empty( LicenseManager::get_server_secret() ) ? '••••••••••••••••' : '' ); ?>">
+                        <p class="description"><?php esc_html_e( '64-character verification secret from your license account. Leave empty to keep existing.', 'wp-fedistream' ); ?></p>
+                    </td>
+                </tr>
+            </table>
+
+            <p class="submit">
+                <?php submit_button( __( 'Save License Settings', 'wp-fedistream' ), 'primary', 'submit', false ); ?>
+                <button type="button" id="fedistream-validate-license" class="button button-secondary" style="margin-left: 10px;">
+                    <span class="dashicons dashicons-yes" style="vertical-align: middle; margin-top: -2px;"></span>
+                    <?php esc_html_e( 'Validate License', 'wp-fedistream' ); ?>
+                </button>
+                <button type="button" id="fedistream-activate-license" class="button button-secondary" style="margin-left: 10px;">
+                    <span class="dashicons dashicons-admin-network" style="vertical-align: middle; margin-top: -2px;"></span>
+                    <?php esc_html_e( 'Activate License', 'wp-fedistream' ); ?>
+                </button>
+                <span id="fedistream-license-spinner" class="spinner" style="float: none; margin-top: 4px;"></span>
+            </p>
+        </form>
+
+        <div id="fedistream-license-message" style="display: none; margin-top: 10px;"></div>
+
+        <script type="text/javascript">
+            var fedistreamLicenseNonce = '<?php echo esc_js( wp_create_nonce( 'fedistream_license_action' ) ); ?>';
+        </script>
+        <?php
+    }
+
+    /**
+     * Render the Default Settings tab.
+     *
+     * @param int    $max_upload_size Max upload size in MB.
+     * @param string $default_license Default license.
+     * @return void
+     */
+    private function render_settings_tab( int $max_upload_size, string $default_license ): void {
+        ?>
+        <form method="post" action="">
+            <?php wp_nonce_field( 'fedistream_save_settings', 'fedistream_settings_nonce' ); ?>
+
+            <table class="form-table">
+                <tr>
+                    <th scope="row">
+                        <label for="max_upload_size"><?php esc_html_e( 'Max Upload Size', 'wp-fedistream' ); ?></label>
+                    </th>
+                    <td>
+                        <input type="number" name="max_upload_size" id="max_upload_size" value="<?php echo esc_attr( $max_upload_size ); ?>" min="1" max="500" class="small-text"> MB
+                        <p class="description"><?php esc_html_e( 'Maximum file size for audio uploads.', 'wp-fedistream' ); ?></p>
+                    </td>
+                </tr>
+                <tr>
+                    <th scope="row">
+                        <label for="default_license"><?php esc_html_e( 'Default License', 'wp-fedistream' ); ?></label>
+                    </th>
+                    <td>
+                        <select name="default_license" id="default_license">
+                            <option value="all-rights-reserved" <?php selected( $default_license, 'all-rights-reserved' ); ?>><?php esc_html_e( 'All Rights Reserved', 'wp-fedistream' ); ?></option>
+                            <option value="cc-by" <?php selected( $default_license, 'cc-by' ); ?>>CC BY</option>
+                            <option value="cc-by-sa" <?php selected( $default_license, 'cc-by-sa' ); ?>>CC BY-SA</option>
+                            <option value="cc-by-nc" <?php selected( $default_license, 'cc-by-nc' ); ?>>CC BY-NC</option>
+                            <option value="cc-by-nc-sa" <?php selected( $default_license, 'cc-by-nc-sa' ); ?>>CC BY-NC-SA</option>
+                            <option value="cc0" <?php selected( $default_license, 'cc0' ); ?>>CC0 (Public Domain)</option>
+                        </select>
+                        <p class="description"><?php esc_html_e( 'Default license for new uploads.', 'wp-fedistream' ); ?></p>
+                    </td>
+                </tr>
+            </table>
+
+            <?php submit_button(); ?>
+        </form>
+        <?php
+    }
+
+    /**
+     * Render the Integrations tab.
+     *
+     * @param int $enable_activitypub Whether ActivityPub is enabled.
+     * @param int $enable_woocommerce Whether WooCommerce integration is enabled.
+     * @return void
+     */
+    private function render_integrations_tab( int $enable_activitypub, int $enable_woocommerce ): void {
+        ?>
+        <form method="post" action="">
+            <?php wp_nonce_field( 'fedistream_save_settings', 'fedistream_settings_nonce' ); ?>
+
+            <table class="form-table">
+                <tr>
+                    <th scope="row"><?php esc_html_e( 'ActivityPub Integration', 'wp-fedistream' ); ?></th>
+                    <td>
+                        <label>
+                            <input type="checkbox" name="enable_activitypub" value="1" <?php checked( $enable_activitypub, 1 ); ?>>
+                            <?php esc_html_e( 'Enable ActivityPub features', 'wp-fedistream' ); ?>
+                        </label>
+                        <p class="description"><?php esc_html_e( 'Publish releases to the Fediverse and allow followers.', 'wp-fedistream' ); ?></p>
+                        <?php if ( ! $this->is_activitypub_active() ) : ?>
+                            <p class="description" style="color: #dba617;">
+                                <span class="dashicons dashicons-warning" style="font-size: 16px; width: 16px; height: 16px; vertical-align: text-bottom;"></span>
+                                <?php esc_html_e( 'The ActivityPub plugin is recommended for full Fediverse integration.', 'wp-fedistream' ); ?>
+                            </p>
+                        <?php endif; ?>
+                    </td>
+                </tr>
+                <tr>
+                    <th scope="row"><?php esc_html_e( 'WooCommerce Integration', 'wp-fedistream' ); ?></th>
+                    <td>
+                        <label>
+                            <input type="checkbox" name="enable_woocommerce" value="1" <?php checked( $enable_woocommerce, 1 ); ?> <?php disabled( ! $this->is_woocommerce_active() ); ?>>
+                            <?php esc_html_e( 'Enable WooCommerce features', 'wp-fedistream' ); ?>
+                        </label>
+                        <?php if ( ! $this->is_woocommerce_active() ) : ?>
+                            <p class="description" style="color: #d63638;">
+                                <span class="dashicons dashicons-dismiss" style="font-size: 16px; width: 16px; height: 16px; vertical-align: text-bottom;"></span>
+                                <?php esc_html_e( 'WooCommerce is not installed or active.', 'wp-fedistream' ); ?>
+                            </p>
+                        <?php else : ?>
+                            <p class="description"><?php esc_html_e( 'Sell albums and tracks through WooCommerce.', 'wp-fedistream' ); ?></p>
+                        <?php endif; ?>
+                    </td>
+                </tr>
+            </table>
+
+            <?php submit_button(); ?>
+        </form>
+        <?php
+    }
+
     /**
      * Enqueue admin assets.
      *
@@ -587,8 +865,35 @@ final class Plugin {
      * @param array  $context  Template context variables.
      * @return string Rendered template.
      */
-    public function render( string $template, array $context = array() ): string {
+    public function render( string $template, array $context = array(), bool $is_main_template = false ): string {
-        return $this->twig->render( $template . '.twig', $context );
+        // If we're already rendering the main template, block any other renders.
+        if ( self::$rendering_main_template && ! $is_main_template ) {
+            return '<!-- FediStream: blocked during main template render -->';
+        }
+
+        // Prevent infinite recursion in Twig rendering.
+        if ( self::$render_depth >= self::MAX_RENDER_DEPTH ) {
+            return '<!-- FediStream: render depth exceeded -->';
+        }
+
+        // Set main template lock if this is the main template.
+        $was_main = self::$rendering_main_template;
+        if ( $is_main_template ) {
+            self::$rendering_main_template = true;
+        }
+
+        ++self::$render_depth;
+
+        try {
+            $result = $this->twig->render( $template . '.twig', $context );
+        } finally {
+            --self::$render_depth;
+            if ( $is_main_template ) {
+                self::$rendering_main_template = $was_main;
+            }
+        }
+
+        return $result;
     }
 
     /**

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: 0.2.0
+ * Version: 0.4.9
  * 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', '0.2.0' );
+define( 'WP_FEDISTREAM_VERSION', '0.4.9' );
 
 /**
  * Plugin file path.