Custom font fallback no longer covers the whole BMP/SIP, so Segoe UI Emoji
can paint color glyphs again; CJK still prefers Noto Sans SC then YaHei.
Drop GaussianBlur compatible targets during BeginDraw (they retained GPU
memory as the candidate window grew), grow the composition swapchain in
64px steps without shrinking, and reuse Card chrome plus cached text
formats instead of reallocating them every layout.
MenuFlyoutItem gains leading SVG icons (ID2D1SvgDocument), an optional
trailing toggle switch, and content-based width measurement so tray-style
menu items match the HTML menu layout. Default UI font is now Noto Sans SC
with Microsoft YaHei fallback via IDWriteFontFallback; CreateTextFormat
gracefully falls back when the primary family is missing.
Adopt an existing HWND, render through D3D11/DXGI/DirectComposition, and
extend CandidateList with horizontal layout, skin colors, click-to-commit,
and a D2D context menu. Preedit TextBlock draws a caret in a fixed insert
slot so neighboring glyphs reflow instead of using letter-spacing; the
default end caret sits slightly after the last character.
Ouchihao