修复：欢迎消息中的发送者名字改为可点击（保留职务前缀内的名字，不额外显示）

resources/js/chat-room/message-renderer.js

@@ -202,9 +202,25 @@ export function appendMessage(msg, renderBatch = null) {
     } else if (msg.action === "欢迎") {
         div.style.cssText =
             "background: linear-gradient(135deg, #eff6ff, #f0f9ff); border: 1.5px solid #3b82f6; border-radius: 5px; padding: 5px 10px; margin: 3px 0; box-shadow: 0 1px 3px rgba(59,130,246,0.12);";
-        const fromHtml = clickableUser(msg.from_user, "#1d4ed8", nameClass);
-        const parsedContent = parseBracketUsers(msg.content, "#1d4ed8");
-        html = `<div style="color: #1e40af;">💬 ${fromHtml}：${parsedContent} <span style="color: #93c5fd; font-size: 11px; font-weight: normal;">(${timeStr})</span></div>`;
+        const userName = msg.from_user;
+        const rawContent = msg.content || "";
+        const colonIndex = rawContent.indexOf("：");
+        let clickablePrefix = "";
+        let bodyPart = rawContent;
+        if (colonIndex !== -1) {
+            const prefixStr = rawContent.substring(0, colonIndex);
+            bodyPart = rawContent.substring(colonIndex);
+            const lastIdx = prefixStr.lastIndexOf(userName);
+            if (lastIdx !== -1) {
+                clickablePrefix =
+                    prefixStr.substring(0, lastIdx) +
+                    clickableUser(userName, "#1d4ed8", nameClass);
+            } else {
+                clickablePrefix = prefixStr;
+            }
+        }
+        const parsedBody = parseBracketUsers(bodyPart, "#1d4ed8");
+        html = `<div style="color: #1e40af;">💬 ${clickablePrefix}${parsedBody} <span style="color: #93c5fd; font-size: 11px; font-weight: normal;">(${timeStr})</span></div>`;
         timeStrOverride = true;
     } else if (SYSTEM_USERS.includes(msg.from_user)) {
         if (msg.from_user === "系统公告") {