fix bug (#328)

* fix bugs

1. 修复default主题mixin.js文件丢失
2. 修复主题默认值为后台设置值
3. default主题样式优化

* 修复前台切换 theme-custom 不生效

resource/static/theme-default/js/mixin.js

@@ -0,0 +1,56 @@
+const mixinsVue = {
+    delimiters: ['@#', '#@'],
+    data: {
+        preferredTemplate: null,
+        isMobile: false
+    },
+    created() {
+        this.isMobile = this.checkIsMobile();
+        this.preferredTemplate = this.getCookie('preferred_theme') ? this.getCookie('preferred_theme') : this.$root.defaultTemplate;
+    },
+    methods: {
+        toggleTemplate(template) {
+            if( template != this.preferredTemplate){
+                this.preferredTemplate = template;
+                this.updateCookie("preferred_theme", template);
+                window.location.reload();
+            }
+        },
+        updateCookie(name, value) {
+            document.cookie = name + "=" + value +"; path=/";
+        },
+        getCookie(name) {
+            const cookies = document.cookie.split(';');
+            let cookieValue = null;
+            for (let i = 0; i < cookies.length; i++) {
+                const cookie = cookies[i].trim();
+                if (cookie.startsWith(name + '=')) {
+                    cookieValue = cookie.substring(name.length + 1, cookie.length);
+                    break;
+                }
+            }
+            return cookieValue;
+        },
+        checkIsMobile() { // 检测设备类型,页面宽度小于768px认为是移动设备
+            return window.innerWidth <= 768;
+        },
+        logOut(id) {
+            $.ajax({
+                type: 'POST',
+                url: '/api/logout',
+                data: JSON.stringify({ id: id }),
+                contentType: 'application/json',
+                success: function (resp) {
+                    if (resp.code == 200) {
+                        window.location.reload();
+                    } else {
+                        alert('注销失败(Error ' + resp.code + '): ' + resp.message);
+                    }
+                },
+                error: function (err) {
+                    alert('网络错误: ' + err.responseText);
+                }
+            });
+        }
+    }
+}