v0.25.0

Fixed

• Legend text vertical centering now uses an explicit dy offset instead of
  dominant-baseline, which WebKit (WKWebView / Safari) rendered inconsistently.
  Legend labels are now vertically centered in the desktop app and Obsidian.

Removed

• Removed 9 confirmed-dead internal exports (pre-1.0 cleanup). These were never
  part of the documented public API.

Internal

• Added a LICENSE file and a license field to package.json.
• CI now runs the hygiene trio (dead-code, duplication, and dependency checks)
  on push/PR.