feat(admin): refine theme settings UI

assets/admin/src/pages/tools/ToolsEmailRollback.vue

@@ -26,7 +26,7 @@
               <p style="margin: 6px 0 0; color: #4b5565;">
                 {{ item.current_email }} → {{ item.previous_email }}
               </p>
-              <p style="margin: 6px 0 0; color: #7a7f8a; font-size: 12px;">
+              <p style="margin: 6px 0 0; color: var(--aksrt-color-muted); font-size: 12px;">
                 剩余窗口：{{ Math.max(0, Math.floor((item.expires_in || 0) / 3600)) }} 小时
               </p>
             </div>

assets/admin/src/pages/tools/ToolsUpdate.vue

@@ -179,7 +179,7 @@ async function handleDismiss() {
   flex-direction: column;
   gap: 4px;
   padding: 14px;
-  border: 1px solid #eef1f6;
+  border: 1px solid var(--aksrt-color-border);
   border-radius: 12px;
   text-decoration: none;
   color: inherit;
@@ -187,7 +187,7 @@ async function handleDismiss() {
 }
 
 .aksrt-update__guide:hover {
-  border-color: #1890ff;
+  border-color: var(--aksrt-color-primary);
   background: #f5faff;
 }