feat(admin): add msh_single_admin project and harden ignore rules

Introduce the new Vue admin project into version control while tightening gitignore patterns to keep env files, logs, build artifacts, and test outputs out of commits.

Made-with: Cursor

msh_single_admin/src/layout/mixin/ResizeHandler.js

@@ -0,0 +1,55 @@
+// +----------------------------------------------------------------------
+// | CRMEB [ CRMEB赋能开发者，助力企业发展 ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2016~2025 https://www.crmeb.com All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed CRMEB并不是自由软件，未经许可不能去掉CRMEB相关版权
+// +----------------------------------------------------------------------
+// | Author: CRMEB Team <admin@crmeb.com>
+// +----------------------------------------------------------------------
+
+import store from '@/store';
+
+const { body } = document;
+const WIDTH = 992; // refer to Bootstrap's responsive design
+
+export default {
+  watch: {
+    $route() {
+      if (this.device === 'mobile' && this.sidebar.opened) {
+        store.dispatch('app/closeSideBar', { withoutAnimation: false });
+      }
+    },
+  },
+  beforeMount() {
+    window.addEventListener('resize', this.$_resizeHandler);
+  },
+  beforeDestroy() {
+    window.removeEventListener('resize', this.$_resizeHandler);
+  },
+  mounted() {
+    const isMobile = this.$_isMobile();
+    if (isMobile) {
+      store.dispatch('app/toggleDevice', 'mobile');
+      store.dispatch('app/closeSideBar', { withoutAnimation: true });
+    }
+  },
+  methods: {
+    // use $_ for mixins properties
+    // https://vuejs.org/v2/style-guide/index.html#Private-property-names-essential
+    $_isMobile() {
+      const rect = body.getBoundingClientRect();
+      return rect.width - 1 < WIDTH;
+    },
+    $_resizeHandler() {
+      if (!document.hidden) {
+        const isMobile = this.$_isMobile();
+        store.dispatch('app/toggleDevice', isMobile ? 'mobile' : 'desktop');
+
+        if (isMobile) {
+          store.dispatch('app/closeSideBar', { withoutAnimation: true });
+        }
+      }
+    },
+  },
+};