feat: 增加自定义头像上传、自动压缩与自动清理功能，统一全站头像路径读取逻辑

resources/views/chat/partials/scripts.blade.php

@@ -205,6 +205,7 @@
             item.dataset.username = username;
 
             const headface = (user.headface || '1.gif').toLowerCase();
+            const headImgSrc = headface.startsWith('storage/') ? '/' + headface : '/images/headface/' + headface;
 
             // 徽章优先级：职务图标 > 管理员 > VIP
             let badges = '';
@@ -224,7 +225,7 @@
             // 女生名字使用玫粉色
             const nameColor = (user.sex == 2) ? 'color:#e91e8c;' : '';
             item.innerHTML = `
-                <img class="user-head" src="/images/headface/${headface}" onerror="this.src='/images/headface/1.gif'">
+                <img class="user-head" src="${headImgSrc}" onerror="this.src='/images/headface/1.gif'">
                 <span class="user-name" style="${nameColor}">${username}</span>${badges}
             `;
 
@@ -369,7 +370,7 @@
         const buggleUsers = ['钓鱼播报', '星海小博士', '送花播报', '系统传音', '系统公告'];
         const senderInfo = onlineUsers[msg.from_user];
         const senderHead = ((senderInfo && senderInfo.headface) || '1.gif').toLowerCase();
-        let headImgSrc = `/images/headface/${senderHead}`;
+        let headImgSrc = senderHead.startsWith('storage/') ? '/' + senderHead : `/images/headface/${senderHead}`;
         if (msg.from_user === 'AI小班长') {
             headImgSrc = '/images/ai_bot.png';
         } else if (buggleUsers.includes(msg.from_user)) {