eval done && fix findDOMNode warning

public/content.js

@@ -3,6 +3,31 @@
         return;
     }
     window.contentScriptInjected = true;
+    // 检查并插入 CSS 样式
+    const styleId = 'injected-css-style';
+    if (!document.getElementById(styleId)) {
+        const style = document.createElement('style');
+        style.id = styleId;
+        style.textContent = `
+            body {
+                border: 3px solid red;
+                position: relative; /* Ensure the body is positioned to allow the pseudo-element */
+            }
+            body::after {
+                content: "Injection successful";
+                display: block;
+                position: fixed;
+                top: 10px;
+                right: 10px;
+                background: green;
+                color: white;
+                padding: 5px 10px;
+                font-size: 16px;
+                z-index: 1000;
+            }
+        `;
+        document.head.appendChild(style);
+    }
     chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
         if (request.type === 'yakit_inject_script') {
             const injectedScriptURL = chrome.runtime.getURL('inject.js');
@@ -14,7 +39,7 @@
             };
             (document.head || document.documentElement).appendChild(script);
             window.addEventListener('message', function onMessage(event) {
-                if (event.source !== window || event.data.type !== 'FROM_PAGE') {
+                if (event.source !== window || event.data.type !== 'FROM_INJECT_JS') {
                     return;
                 }
                 window.removeEventListener('message', onMessage);