Menu screens: rock background, centred frame, logo, 3D hero

- Spielen hero panel shows the selected hero in 3D (cUI_NetGranny,
  game/ui/granny.h).
- All menu screens draw on the options' rock wall; the main menu's 1024
  frame is drawn centred over it, mouse and cursor shifted to match.
- The main menu's and options' own pictures and the main menu's 3D scene
  are left out (textures hidden by surface, scene call redirected).
- Logo top left: FX_SACREDLOGO.TGA, drawn added.
- Game textures by name (game/ui/texture.h), textured and added quads.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/todo.md

@@ -211,7 +211,15 @@ space far better. No 16:9 artwork exists for the game (user, 2026-10-20):
 we design our own UIs, using the width beyond the 1024 frame (now drawn in
 a centred 1024x768 viewport with black sides, hud.cpp FrameScope). Design
 for 16:9 (1920x1080, 1365x768 UI units), not ultrawide (user). Screen done
-2026-10-20 (docs/characters.md, "Spielen screen"; docs/screens.md). Open:
-the render of the selected hero (the hero panel shows text only; reuse
-cUI_Character's 3D hero?), list scrolling beyond 9 characters, larger
+2026-10-20 (docs/characters.md, "Spielen screen"; docs/screens.md). Hero
+in 3D done 2026-10-20. Open: list scrolling beyond 9 characters, larger
 heading font.
+
+## Fine-tuning the Spielen and options screens (2026-10-21)
+
+The user is very satisfied with the menu rework for now (rock background on
+all menu screens, centred menu frame, logo, Spielen screen with the 3D
+hero), but both the Spielen screen and the options window still need a lot
+of fine-tuning. Details to be collected when we get to it; known so far:
+list scrolling beyond 9 characters, larger heading font, the options
+window's layout in the width beyond its 1024 frame.