feat：优化头像展示逻辑

@@ -377,7 +377,7 @@ struct MineHomePage {
         .onClick(() => {
           router.back()
         })
-      Image(`${this.headPhotoUrl}`)
+      Image(this.headPhotoUrl&&this.headPhotoUrl.length>0?this.headPhotoUrl:(this.userType === "1"?$r('app.media.default_head_userPage'):$r('app.media.AccountOwner_DefaultIcon')))
         .alt($r('app.media.default_head'))
         .width('60lpx')
         .height('60lpx')