fix(desktop): sharpen installer brand art and progress-page scaling

Re-render the four installer brand banners from the vector sources:
the badge follows the Figma spec (three-stop gradients, layered drop
shadows) and the whale no longer inherits shape-rendering=crispEdges,
which disabled anti-aliasing and left jagged edges. The wordmark now
reaches its design color instead of a soft #353638.

Draw the progress-page brand with high-quality bicubic interpolation
and half-pixel offset so the always-2x bitmap stays crisp when scaled
down at 96 DPI.

apps/desktop/installer/window-frame.cpp

@@ -108,6 +108,8 @@ static LRESULT CALLBACK ProgressProc(HWND window, UINT message, WPARAM wparam, L
             graphics.ScaleTransform(page->dpi / 96.0f, page->dpi / 96.0f);
             graphics.Clear(page->dark ? Color(255, 21, 21, 23) : Color(255, 255, 255, 255));
             graphics.SetSmoothingMode(SmoothingModeAntiAlias);
+            graphics.SetInterpolationMode(InterpolationModeHighQualityBicubic);
+            graphics.SetPixelOffsetMode(PixelOffsetModeHalf);
             graphics.DrawImage(page->brand, Rect(0, 174, 600, 196));
             const int stage = static_cast<int>(reinterpret_cast<INT_PTR>(GetPropW(GetParent(window), L"HarnessInstaller.Stage")));
             const double fraction = reinterpret_cast<UINT_PTR>(GetPropW(GetParent(window), L"HarnessInstaller.ExtractProgress")) / 100.0;