feat(界面设计): 默认窗口材质改为纯色

assets/webui/ofdgo_theme.js

@@ -3,7 +3,7 @@
 	const preference = matchMedia("(prefers-color-scheme: dark)");
 	const key = "ofdgo.theme";
 	let mode = root.dataset.themeMode || "system";
-	let material = root.dataset.windowChoice || "acrylic";
+	let material = root.dataset.windowChoice || "solid";
 	let host = null, report = null, pending = Promise.resolve(), revision = 0, committed = null;
 	if (!root.dataset.themeMode) {
 		try { mode = localStorage.getItem(key) || "system"; } catch {}

internal/webview/webview.go

@@ -1213,16 +1213,12 @@ func windowOptions(dataDir string) (guigo.Options, error) {
 	if err != nil {
 		return guigo.Options{}, err
 	}
-	material := guigo.WindowSolid
-	if guigo.SupportsWindowMaterial(guigo.WindowAcrylic) {
-		material = guigo.WindowAcrylic
-	}
 	return guigo.Options{
 		AppID:          appID,
 		Title:          "OFDGo - OFD编辑器",
 		TitleBar:       guigo.TitleBarContent,
 		TitleBarColors: themeColors(false),
-		WindowMaterial: material,
+		WindowMaterial: guigo.WindowSolid,
 		Icon:           icon,
 		Width:          1440,
 		Height:         900,

internal/webview/webview_theme.go

@@ -49,7 +49,7 @@ func themeColors(dark bool) guigo.TitleBarColors {
 // loadTheme 在创建窗口前读取用户目录中的主题偏好
 // 返回: error 读取或解析错误
 func (h *Host) loadTheme() error {
-	h.theme = applicationTheme{Mode: "system", Material: "acrylic"}
+	h.theme = applicationTheme{Mode: "system", Material: "solid"}
 	data, err := os.ReadFile(h.themePath)
 	if os.IsNotExist(err) {
 		return nil