chore: 添加设计资料和示例工程

sample/front/src/constants/avatar.ts

@@ -0,0 +1,14 @@
+/** Local default avatar: linear neutral user icon. */
+export const DEFAULT_USER_AVATAR = '/avatar-default.svg';
+
+const BROKEN_AVATAR_PATTERN = /pstatp\.com|vcloud\/vadmin/;
+
+export function resolveAvatarUrl(url?: string) {
+  if (!url || BROKEN_AVATAR_PATTERN.test(url)) {
+    return DEFAULT_USER_AVATAR;
+  }
+  if (url.startsWith('//')) {
+    return `https:${url}`;
+  }
+  return url;
+}