Map and Map Editor #13

Summary

Adds the global TownSquare map and a visual map editor for service admins.

Changes

• Display verified TownSquares and connections on the public map
• Add deterministic town positioning and scenery rendering
• Let service admins paint forests with configurable size and density
• Support mountains, freehand lakes, and curved rivers
• Add erase, undo, redo, discard, and explicit save controls
• Persist maps under DATA_DIR
• Migrate legacy fixed lakes to water strokes
• Update documentation and changelog

Testing

• npm run check
• Full real-server smoke suite
• Persistence verified across server restarts
• Browser-tested painting, water drawing, undo/redo, saving, and public rendering

🎬 Cutter preview — PR #13

Use map painting tools (Tree brush, Mountain, Lake brush, River, Eraser) — Painting tools let users draw trees, mountains, lakes, rivers, and erase scenery on the world map in real time.	Zoom or reset the public map view — Zoom controls scale the public TownSquare map in and out.
View TownSquare site details — Selecting a square opens a details dialog with its name, origin URL, and a Visit site button.	open service admin world map editor — World map editor lets admins paint trees, mountains, lakes, and rivers around TownSquares before saving.
Adjust map brush size and tree density — Brush size and tree density sliders tune the tree brush, with live value readouts.	Toggle widget help panel — Help dialog explains TownSquare with controls guide and links to the map and homepage.