move the debug stats panel out of the renderer

src/ui/GameWorldView.h

@@ -150,6 +150,10 @@ private:
     // Screen-anchored chrome, drawn after the world (see WorldRenderer): these
     // need no world transform, which is exactly why they stayed here.
     void drawScreenSpace(QPainter& painter);
+    // Threat and production readout shown while debug draw is on (F3). Positioned
+    // in pixels at the top-left corner, so it belongs with the chrome rather than
+    // with the world.
+    void drawDebugOverlay(QPainter& painter);
     // Vignette-style border shown while the game is paused (speed 0x, REQ-UI-PAUSE-BORDER)
     // to make the paused state hard to miss: a black frame whose alpha fades from 50% at
     // the viewport edges to 0% toward the center.