v0.5.5-rc1 (source pre-release)

Source-only pre-release of the upcoming v0.5.5, published to register the
Zenodo archive and mint the concept DOI ahead of the v0.5.5 release.

This is not a distributable build:

• No desktop installers (DMG/MSI) and no PyPI publish — the release pipeline
  deliberately skips pre-release (-rc) tags.
• To install Wordflow, use the latest stable release: https://sih.tools/wordflow

For maintainers: once Zenodo archives this pre-release, take the concept DOI and
bake it into frontend/public/references/general.md and CITATION.cff for the
v0.5.5 release.