port(EterLib): TextBar/DibBar/BlockTexture for uiTip TipBoard/BigBoard

TextBar and DibBar verbatim over the FreeType GDI shim (+GetTextExtentPoint32A);
BlockTexture verbatim except Render, which records the clipped quad as a UI
image of the device CPU texture (UIRenderAddImageNamed). Notices now render;
port.text_bar covers block split, pixels, colour, ClearBar and TipBoard clip.

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

src/platform/EterLib/UIRenderCommands.cpp

@@ -104,6 +104,11 @@ void UIRenderRestoreClip() {
 
 void UIRenderAddImage(const CGraphicTexture* texture, const float x[4], const float y[4],
                       float su, float sv, float eu, float ev, std::uint32_t argb, int blend) {
+    UIRenderAddImageNamed(UIRenderTextureName(texture), x, y, su, sv, eu, ev, argb, blend);
+}
+
+void UIRenderAddImageNamed(const std::string& texture_name, const float x[4], const float y[4],
+                           float su, float sv, float eu, float ev, std::uint32_t argb, int blend) {
     // 40250 draws the image quad through the device: the UI pass's world transform places it
     // (identity except where a caller sets one, e.g. CPythonMiniMap::RenderAtlas's window offset) and a
     // stage-0 MODULATE with D3DTA_TFACTOR tints it (the atlas's NPC/warp/waypoint marks).
@@ -139,7 +144,7 @@ void UIRenderAddImage(const CGraphicTexture* texture, const float x[4], const fl
     command.y1 = std::min({command.qy[0], command.qy[1], command.qy[2], command.qy[3]});
     command.x2 = std::max({command.qx[0], command.qx[1], command.qx[2], command.qx[3]});
     command.y2 = std::max({command.qy[0], command.qy[1], command.qy[2], command.qy[3]});
-    command.text = UIRenderTextureName(texture);
+    command.text = texture_name;
     command.quad = true;
     command.su = su; command.sv = sv; command.eu = eu; command.ev = ev;
     command.blend = blend;