refactor(*): 用户工作台 - 统一画布、任务中心与设置页产品化交互

web/src/components/canvas/canvas-image-settings-popover.tsx

@@ -107,7 +107,7 @@ function ImageSettingsPortal({
     const topPlacement = placement?.startsWith("top");
     const style = {
         position: "fixed",
-        zIndex: "var(--z-popover)",
+        zIndex: "var(--z-dialog-popover)",
         width,
         left: Math.max(margin, Math.min(window.innerWidth - width - margin, left)),
         ...(topPlacement ? { bottom: window.innerHeight - buttonRect.top + gap, maxHeight: Math.max(260, buttonRect.top - margin * 2) } : { top: buttonRect.bottom + gap, maxHeight: Math.max(260, window.innerHeight - buttonRect.bottom - margin * 2) }),