feat: widen Minas Tirith outer wall to 6 blocks

Enhance grid visibility for counting outside blocks

Fix moving labels, add edge visibility, bump version to 2.2.0

Fix dimension rendering: static labels, collision detection, and background grid

Update screenshots for v2.1.0

Release v2.1.0: Login, Rotation, UI Updates

Fix responsive layout: flex constraint and mobile padding

Fix login layout: remove gap between input and button

Refine login button styling (join input and button)

Fix login logic (restore main.js) and CSS formatting

Implement login system with password protection

Rotate Minas Tirith generator 180 degrees (facing West)

Fix arrow glitch: decouple dimension lines from sticky text position

Improve label visualization: reduce zoom threshold, true total counts, dynamic clutter filter

Improve zoom (zoom to cursor) and keyboard navigation (arrow keys)