fix: 修复子路径部署静态资源引用

- 修复 admin 与 usercenter 登录验证码资源在 /flow 子路径下的加载路径

- 统一 logo、空状态图、兜底头像与模型服务商图标的 BASE_URL 处理

- 补齐 usercenter 公共布局与 loading 注入的子路径兼容

easyflow-ui-admin/app/src/views/ai/model/modelUtils/defaultIcon.ts

@@ -1,5 +1,7 @@
 import providerList from './providerList.json';
 
+const assetBase = import.meta.env.BASE_URL || '/';
+
 export interface ProviderModelPreset {
   description: string;
   label: string;
@@ -28,8 +30,25 @@ export interface ProviderPreset {
 
 const providerOptions = providerList as ProviderPreset[];
 
-export const getProviderPresetByValue = (targetValue?: string) =>
-  providerOptions.find((item) => item.value === targetValue);
+const normalizeAssetUrl = (url?: string) => {
+  if (!url || !url.startsWith('/')) {
+    return url || '';
+  }
+  return `${assetBase}${url.slice(1)}`;
+};
+
+export const getProviderPresetByValue = (targetValue?: string) => {
+  const preset = providerOptions.find((item) => item.value === targetValue);
+
+  if (!preset) {
+    return undefined;
+  }
+
+  return {
+    ...preset,
+    icon: normalizeAssetUrl(preset.icon),
+  };
+};
 
 /**
  * 根据传入的value，返回对应的icon属性
@@ -63,4 +82,7 @@ export const getProviderBadgeText = (
   return source.replaceAll(/\s+/g, '').slice(0, 2).toUpperCase();
 };
 
-export const providerPresets = providerOptions;
+export const providerPresets = providerOptions.map((item) => ({
+  ...item,
+  icon: normalizeAssetUrl(item.icon),
+}));