feat: integrate PDF Tools with toolbox portal

CHANGELOG.md

@@ -4,13 +4,20 @@ All notable changes to `pdf-tools` are documented here.
 
 The project follows a pragmatic versioning scheme while the app is still below `1.0.0`: minor versions mark coherent user-facing milestones; patch versions mark fixes and small improvements.
 
-## 0.3.4 — PDF.js browser compatibility fix
+## 0.3.4 — PDF.js compatibility and Toolbox integration
+
+### Added
+
+- Added a generated Toolbox App Contract manifest and shared Toolbox Shell integration with standalone fallback.
+- Added deterministic, checksummed release ZIP packaging for artifact-based toolbox assembly.
 
 ### Changed
 
 - Centralized PDF.js setup in a shared module so thumbnail rendering and page preview use the same legacy PDF.js build and worker configuration.
 - Added a local PDF.js worker wrapper that installs a `Uint8Array.prototype.toHex` compatibility shim before PDF.js worker code runs.
 - Added the same `toHex` compatibility shim in the main app bundle for browsers that do not provide it natively.
+- Made Vite asset URLs relative so the app can be hosted at arbitrary nested paths.
+- Corrected the documented licence identifier to `AGPL-3.0-only`.
 - Bumped the app/package version to `0.3.4`.
 
 ## 0.3.2 — Multi-file merge queue release