fix(layuimini): improve tab context menu positioning and behavior

- Update tab context menu CSS to use fixed positioning with higher z-index
- Modify JavaScript to prevent default context menu and use correct left position

public/static/admin/js/index.js

@@ -146,7 +146,7 @@ define(["jquery", "easy-admin", "echarts", "echarts-theme", "miniAdmin", "miniTh
                 showComposerInfo: function () {
                     // <div style="padding: 25px;">12313</div>
                     let html = ``
-                    ea.request.post({
+                    ea.request.get({
                         url: ea.url('ajax/composerInfo'),
                     }, function (success) {
                         let data = success.data