✨ feat(im): 优化 ContextMenu.vue 组件

src/views/im/home/components/ContextMenu.vue

@@ -0,0 +1,82 @@
+<template>
+  <!--
+    通用右键菜单
+    由 useImUiStore.openContextMenu(position, items, onSelect) 触发全局单例展示
+    调用方在 @contextmenu.prevent 事件里调 openContextMenu 即可，不需要自己挂组件
+  -->
+  <teleport to="body">
+    <div
+      v-if="contextMenu.show"
+      class="fixed inset-0 z-9999"
+      @click.stop="handleClose"
+      @contextmenu.prevent="handleClose"
+    >
+      <div
+        class="fixed min-w-30 py-1 bg-[var(--el-bg-color-overlay)] rounded-md shadow-lg"
+        :style="{ left: adjustedPosition.x + 'px', top: adjustedPosition.y + 'px' }"
+      >
+        <div
+          v-for="item in contextMenu.items"
+          :key="item.key"
+          class="px-4 py-2 text-13px text-center cursor-pointer transition-colors text-[var(--el-text-color-primary)] hover:bg-[var(--el-fill-color)]"
+          :class="{ '!text-[var(--el-text-color-disabled)] cursor-not-allowed hover:!bg-transparent': item.disabled }"
+          @click.stop="handleSelect(item)"
+        >
+          {{ item.name }}
+        </div>
+      </div>
+    </div>
+  </teleport>
+</template>
+
+<script lang="ts" setup>
+import { computed } from 'vue'
+
+import { useImUiStore } from '../store/uiStore'
+
+defineOptions({ name: 'ImContextMenu' })
+
+const uiStore = useImUiStore()
+const contextMenu = computed(() => uiStore.contextMenu)
+
+/**
+ * 计算菜单实际渲染坐标：靠近视口右 / 下边缘时回弹，避免菜单被裁剪
+ *
+ * itemHeight / menuWidth 是和模板里 px-4 py-2 + text-13px / min-w-30 配套的实际尺寸；
+ * menuHeight 额外加 8 是外层 py-1 的上下 padding 之和（4px × 2）
+ */
+const adjustedPosition = computed(() => {
+  const items = contextMenu.value.items
+  const itemHeight = 34
+  const menuHeight = items.length * itemHeight + 8
+  const menuWidth = 120
+  let x = contextMenu.value.position.x
+  let y = contextMenu.value.position.y
+  // SSR 兜底：window 不可用时直接返回原始坐标
+  if (typeof window !== 'undefined') {
+    if (y + menuHeight > window.innerHeight) {
+      y = window.innerHeight - menuHeight
+    }
+    if (x + menuWidth > window.innerWidth) {
+      x = window.innerWidth - menuWidth
+    }
+  }
+  return { x, y }
+})
+
+type MenuItem = (typeof contextMenu.value.items)[number]
+
+/** 选中菜单项：disabled 项忽略；正常项调 onSelect 回调后关闭菜单 */
+function handleSelect(item: MenuItem) {
+  if (item.disabled) {
+    return
+  }
+  uiStore.contextMenu.onSelect?.(item)
+  uiStore.closeContextMenu()
+}
+
+/** 关闭菜单：点遮罩 / 在遮罩上再次右键都会触发 */
+function handleClose() {
+  uiStore.closeContextMenu()
+}
+</script>