Pixel look: the world always renders 360 rows high (270/480 selectable), sharp scaling to any screen

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

src/settings.rs

@@ -148,7 +148,8 @@ pub struct Settings {
     pub wall_detail: u8, // 1 low, 2 medium, 3 high
     pub max_lights: u8,  // 8, 16 or 24
     pub ui_factor: u8,   // interface size: 0 = automatic, 1..4 = fixed integer factor
-    pub render_scale: u8, // 3D world resolution divisor: 1 = full, 2..16 = pixel look
+    pub render_scale: u8, // old pixel-look divisor (no longer used, kept for old settings files)
+    pub pixel_rows: u16,  // pixel look: rows of the world on every screen (270, 360, 480)
     pub touch_ui: u8,     // touch interface: 0 = automatic (after the first touch), 1 = on, 2 = off
     pub debug_fps: bool,                // show FPS and rendering backend
     pub debug_frame_time: bool,          // show the frame-time line and graph
@@ -186,6 +187,7 @@ impl Default for Settings {
             max_lights: 24,
             ui_factor: 0,
             render_scale: 1,
+            pixel_rows: 360,
             touch_ui: 0,
             debug_fps: false,
             debug_frame_time: false,