increase scroll speed across contest zone

src/lib/config/WorldConfig.h

@@ -53,6 +53,14 @@ struct WorldArtifacts
     int     artifactWinCount;
 };
 
+// View pan speed (REQ-UI-SCROLL-SPEED). Presentation-only; the simulation ignores these.
+struct WorldScroll
+{
+    double panSpeedSlow_tps;        // tiles/s, used outside the contest zone
+    double panSpeedFast_tps;        // tiles/s, used inside the contest zone
+    int    panRampBandWidth_tiles;  // full width of the ramp band straddling each contest-zone boundary
+};
+
 struct WorldConfig
 {
     int heightTiles;                    // REQ-GW-HEIGHT
@@ -73,4 +81,5 @@ struct WorldConfig
     WorldWaves waves;
     WorldTargeting targeting;
     WorldArtifacts artifacts;
+    WorldScroll scroll;
 };