Expands isOccluded() from same-column-only to a 3x4 tile window
(tileX+-1, tileY+1..4) to catch trees whose canopy extends sideways
and well above the trunk tile. Outline scale bumped to 1.15.
Silhouette now hidden by default and toggled on per frame only when
isOccluded() detects a tree, rock or building 1–3 tiles below the Nisse.
Adds WorldSystem.hasResourceAt() for O(1) tile lookup. Outline colour
changed to light blue (0xaaddff) at scale 1.1.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Fixes#33. Each Nisse now has a white filled outline sprite at depth 900
that is always visible above trees and buildings. The main sprite uses
Y-based depth (floor(y/TILE_SIZE)+5) so Nisse sort correctly with world
objects. Name label, energy bar and job icon moved to depth 901/902 so
they remain readable regardless of occlusion.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Fixes#31. All trees, rocks, seedlings and buildings now use
tileY+5 as depth instead of a fixed value, so objects further
down the screen always render in front of objects above them
regardless of spawn order. Build ghost moved to depth 1000/1001.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
