UI in device pixels on the character grid with fixed integer font sizes, ASCII bars; 3D render scale for a pixel look

- text only at 1x/2x/4x times an integer interface factor (auto or 1-4 in the settings)
- high DPI rendering, own 2D camera in device pixels, mouse converted
- toolbar buttons 6 columns, integer icon scale, minimap integer pixels per tile
- all bars (top bar, unit/tower/gate HP) as CP437 block characters
- 3D world optionally rendered at 1/2, 1/3, 1/4 and upscaled with nearest filtering

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lang/de.lang

@@ -333,3 +333,6 @@ dir.s = Süden
 dir.sw = Südwesten
 dir.w = Westen
 dir.nw = Nordwesten
+
+val.auto = Auto ({0}x)
+set.render_scale = 3D-Auflösung