Close the Datei menu on Escape or a click outside it

Listens in the capture phase while the menu is open, so canvas and grid
handlers that stop propagation can't keep it open.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/components/AppToolbar.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed, ref } from 'vue';
+import { computed, onBeforeUnmount, ref, watch } from 'vue';
 import { useDocument } from '../store/document';
 import { useTheme } from '../composables/useTheme';
 import { useToasts } from '../composables/useToasts';
@@ -30,6 +30,29 @@ const { mode: themeMode, cycle: cycleTheme } = useTheme();
 const toasts = useToasts();
 
 const fileMenuOpen = ref(false);
+const fileMenuWrap = ref<HTMLElement | null>(null);
+
+// Close the Datei menu on Escape or on a press anywhere outside it. Capture
+// phase, so canvas/grid handlers that stop propagation can't swallow it.
+function onOutsidePointer(e: PointerEvent) {
+  if (!fileMenuWrap.value?.contains(e.target as Node)) fileMenuOpen.value = false;
+}
+function onMenuKey(e: KeyboardEvent) {
+  if (e.key === 'Escape') fileMenuOpen.value = false;
+}
+function detachMenuListeners() {
+  document.removeEventListener('pointerdown', onOutsidePointer, true);
+  document.removeEventListener('keydown', onMenuKey, true);
+}
+watch(fileMenuOpen, (open) => {
+  if (open) {
+    document.addEventListener('pointerdown', onOutsidePointer, true);
+    document.addEventListener('keydown', onMenuKey, true);
+  } else {
+    detachMenuListeners();
+  }
+});
+onBeforeUnmount(detachMenuListeners);
 const aboutOpen = ref(false);
 const functionsOpen = ref(false);
 const namedRangesOpen = ref(false);
@@ -295,7 +318,7 @@ function onSample() {
 
     <div class="spacer" />
 
-    <div class="menu-wrap">
+    <div ref="fileMenuWrap" class="menu-wrap">
       <button class="btn" @click="fileMenuOpen = !fileMenuOpen">Datei ▾</button>
       <ul v-if="fileMenuOpen" class="menu" @click="fileMenuOpen = false">
         <li><button @click="onNew">Neu</button></li>