素材接入：分享面板图标 + 启动闪屏 + App 图标（从 docs/Res 拷入）

- 分享图标：shareWechat/QQ/Douyin@3x → entry media，SharePanel 颜色块占位替换为
  真实图标 Image($r('app.media.share_*'))
- 启动闪屏：LaunchImage(2436x1125 横屏) → launch_image，SplashPage 改为全屏背景图
  + 底部叠加启动进度/公告（白字）
- App 图标：AppIcon 替换 AppScope/entry 的 layered_image foreground 前景层

docs/Res 为只读原始素材库，按需拷入；显示效果待真机/模拟器确认

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

entry/src/main/ets/components/SharePanel.ets

@@ -26,9 +26,9 @@ export struct SharePanel {
           .margin({ top: 16, bottom: 16 })
 
         Row() {
-          this.platformButton('微信', 'wechat', '#07C160')
-          this.platformButton('QQ', 'qq', '#12B7F5')
-          this.platformButton('抖音', 'douyin', '#000000')
+          this.platformButton('微信', 'wechat', $r('app.media.share_wechat'))
+          this.platformButton('QQ', 'qq', $r('app.media.share_qq'))
+          this.platformButton('抖音', 'douyin', $r('app.media.share_douyin'))
         }
         .width('100%')
         .justifyContent(FlexAlign.SpaceEvenly)
@@ -55,9 +55,12 @@ export struct SharePanel {
   }
 
   @Builder
-  platformButton(label: string, platform: string, color: string) {
+  platformButton(label: string, platform: string, icon: Resource) {
     Column() {
-      Circle({ width: 56, height: 56 }).fill(color)
+      Image(icon)
+        .width(56)
+        .height(56)
+        .objectFit(ImageFit.Contain)
       Text(label)
         .fontSize(13)
         .fontColor('#333333')