Options: tabs Allgemein / Beute / Tastenbelegung with key bindings

- Options window in three tabs; the auto-pickup settings move to Beute;
  sliders move with their page; black sides like the save game screen.
- Tastenbelegung: every binding settable (click, press key; Esc cancels,
  Backspace unbinds), "Alle zurücksetzen" as a game button, saved on OK.
- Potions bindable (default unbound), named by the game's potion texts; the
  game's own potion hotkeys are off; bar tooltips show the bound key.
- Map (M), overview map (Tab, held) and labels (Alt, held) bindable; the
  game's own M / Tab / Alt handling is switched off.
- Save game key calls the game's save window code instead of a posted key.
- Teleportationstrank: fixed text replacement from startup (also the
  Ausdauertrank items, potion kind 5 as well).

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

src/game/ui/draw.h

@@ -0,0 +1,36 @@
+#pragma once
+// Untextured quads on the UI's Direct3D 7 device (the argument of the UI's
+// render methods, vf14).
+
+#include <cstdint>
+
+#include <windows.h>
+
+namespace game {
+
+constexpr int kDeviceDrawPrimitive = 25;  // IDirect3DDevice7 vtable slots
+constexpr int kDeviceSetTexture = 35;
+constexpr DWORD kTriangleStrip = 5;
+constexpr DWORD kFvfScreenColourTexture = 0x1c4;  // XYZRHW | DIFFUSE | SPECULAR | TEX1
+
+struct ScreenVertex {
+    float x, y, z, rhw;
+    uint32_t diffuse, specular;
+    float u, v;
+};
+
+// Fills (x0, y0)-(x1, y1) with the ARGB colour `color`.
+inline void FillRect(void* device, float x0, float y0, float x1, float y1, uint32_t color) {
+    void** vtable = *static_cast<void***>(device);
+    using SetTextureFn = HRESULT(__stdcall*)(void*, DWORD, void*);
+    using DrawPrimitiveFn = HRESULT(__stdcall*)(void*, DWORD, DWORD, void*, DWORD, DWORD);
+    reinterpret_cast<SetTextureFn>(vtable[kDeviceSetTexture])(device, 0, nullptr);
+    ScreenVertex quad[4] = {{x0, y0, 0, 1, color, 0, 0, 0},
+                            {x1, y0, 0, 1, color, 0, 1, 0},
+                            {x0, y1, 0, 1, color, 0, 0, 1},
+                            {x1, y1, 0, 1, color, 0, 1, 1}};
+    reinterpret_cast<DrawPrimitiveFn>(vtable[kDeviceDrawPrimitive])(device, kTriangleStrip, kFvfScreenColourTexture,
+                                                                     quad, 4, 0);
+}
+
+} // namespace game