[haan]

The editor now uses consistent compact panels, clearer navigation, and task-based Help. Conceptual connections keep their endpoints within class borders and distribute shared connections for more readable layouts; association names no longer leave white patches in transparent PNGs.

• Rework class/table and association/relationship panels, hover actions, sidebar, model title, and View/Preferences menus. Keep associative connections non-renamable and relationship direction explicit.
• Improve orthogonal and parallel association placement, label positioning, and association-class attachments. Add five conceptual smoke models, including a deliberately demanding readability target.
• Replace association label backgrounds with canvas masks and export-safe vector clipping. Preserve lines in transparent PNG exports.
• Fix the extra undo step after class creation, improve file-opening notices, and address annotation interaction issues.
• Redesign Help/About, refresh the README, and bundle the Sora wordmark font with its license.

Validation: 667 tests passed across 50 files; ESLint and the production build passed. The existing large MySQL parser chunk warning remains. Recent responsive Help/About layouts still need browser visual verification; the largest smoke model intentionally exceeds current readability guarantees.