refactor(assets): relocate character cover image

src/app/private-room/components/__tests__/private-album-card.test.tsx

@@ -50,7 +50,7 @@ describe("PrivateAlbumCard", () => {
         images: [
           { url: COVER_URL, locked: false, index: 0 },
           {
-            url: "/images/splash/pic-bg-home.png",
+            url: "/images/cover/elio.png",
             locked: false,
             index: 1,
           },
@@ -59,7 +59,7 @@ describe("PrivateAlbumCard", () => {
     );
 
     expect(html).toContain("elio.png");
-    expect(html).not.toContain("pic-bg-home.png");
+    expect(html).not.toContain("%2Fimages%2Fcover%2Felio.png");
     expect(html).toContain("8 photos");
     expect(html).toContain("A quiet morning by the water.");
     expect(html).toContain('aria-label="Open 8 private album photos"');

src/app/splash/components/__tests__/tailwind-components.test.tsx

@@ -22,7 +22,7 @@ describe("splash Tailwind components", () => {
     expect(html).toContain("absolute");
     expect(html).toContain("bg-sidebar-background");
     expect(html).toContain("object-cover");
-    expect(html).toContain("%2Fimages%2Fsplash%2Fpic-bg-home.png");
+    expect(html).toContain("%2Fimages%2Fcover%2Felio.png");
   });
 
   it("renders SplashContent with Tailwind typography classes", () => {

src/app/splash/components/splash-background.tsx

@@ -3,7 +3,7 @@
  *
  * 
  *   `SizedBox.expand(child: Assets.images.picBgHome.image(fit: BoxFit.cover))`
- * 资源: /public/images/splash/pic-bg-home.png (kebab-case 重命名后)
+ * 资源: /public/images/cover/elio.png
  *       原名: pic_bg_home.png (snake_case)
  *
  * sizes 属性说明：
@@ -17,7 +17,7 @@ export function SplashBackground() {
   return (
     <div className="absolute inset-0 z-0 overflow-hidden bg-sidebar-background">
       <Image
-        src="/images/splash/pic-bg-home.png"
+        src="/images/cover/elio.png"
         alt=""
         fill
         priority

src/app/tip/tip-screen.module.css

@@ -26,7 +26,7 @@
   height: 330px;
   background:
     linear-gradient(180deg, rgba(255, 242, 232, 0.3), #fff2e8 96%),
-    url("/images/splash/pic-bg-home.png") center 18% / cover no-repeat;
+    url("/images/cover/elio.png") center 18% / cover no-repeat;
   opacity: 0.36;
   filter: saturate(0.95) blur(0.2px);
 }