fix(abc:exception): fix force overlay to img (#1928)

Author: cipchk

packages/abc/exception/exception.component.ts

@@ -75,15 +75,15 @@ export class ExceptionComponent {
   backRouterLink = input<string | NzSafeAny[]>('/');
 
   _img = computed(() => {
-    const v = this.typeItem()?.img ?? this.img();
+    const v = this.img() ?? this.typeItem()?.img;
     return v == null ? null : this.dom.bypassSecurityTrustStyle(`url('${v}')`);
   });
   _title = computed(() => {
-    const v = this.typeItem()?.title ?? this.title();
+    const v = this.title() ?? this.typeItem()?.title;
     return v == null ? null : this.dom.bypassSecurityTrustHtml(v);
   });
   _desc = computed(() => {
-    const v = this.typeItem()?.desc ?? this.desc() ?? this.locale()[this.type()];
+    const v = this.desc() ?? this.typeItem()?.desc ?? this.locale()[this.type()];
     return v == null ? null : this.dom.bypassSecurityTrustHtml(v);
   });