refactor(widget): simplify search and author cards

assets/css/frontend/widget-batch3e.css

@@ -11,18 +11,32 @@
   text-align: center;
 }
 .aksrt-author-card__cover {
-  height: 84px;
+  height: 139px;
+  min-height: 139px;
+  max-height: 139px;
   background: linear-gradient(135deg, #93c5fd, #c4b5fd) center/cover no-repeat;
 }
-.aksrt-author-card__body { padding: 0 14px 16px; }
+.aksrt-author-card__body {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  padding: 0 14px 16px;
+}
+.aksrt-author-card__body .user-content {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  width: 100%;
+}
 .aksrt-author-card__avatar {
-  display: inline-block;
-  margin-top: -36px;
+  display: flex;
+  flex: 0 0 auto;
+  margin: -38px auto 0;
   border-radius: 50%;
   overflow: hidden;
   border: 3px solid var(--surface-1, #fff);
-  width: 72px;
-  height: 72px;
+  width: 76px;
+  height: 76px;
 }
 .aksrt-author-card__avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
 .aksrt-author-card__name {