v0.3.2 dev preview

Patch release for page clipping cleanup.\n\n- Filters X/Twitter keyboard-shortcut boilerplate from page captures before writing inbox.org.\n- Adds a native-host cleanup guard so stale or older extension payloads are also filtered.\n- Adds regression tests for the captured markdown cleanup and final inbox.org output.\n\nThe extension is still a dev preview: load the attached zip manually and run the native host setup with your browser extension ID.