Autoreport v0.2.1

This release continues the move from a CLI-only workflow to a public demo that
non-developers can try without local setup.

Highlights

• Added the FastAPI-based browser demo for weekly-report YAML input.
• Switched the demo copy to English for public-facing use.
• Hardened the PowerPoint template compatibility checks before broader release.
• Started the private autorelease publishing workflow for WordPress.com drafts.

What stays the same

The stable v0.1.0 CLI contract remains the reference point. Validation rules for
the weekly-report schema are unchanged.