fix(ui): kiosk dropdown flash + never inherit the OS light theme

Outside-close listeners move from click to pointerdown: pointerdown
fires before the open-toggle re-render, so the kiosk's slow software
compositing can no longer detach the click target mid-flight and close
the menu the instant it opens. color-scheme:dark (CSS + meta) pins every
native control — select popups, scrollbars, pickers — dark regardless of
the user's OS theme; explicit select/option colors cover Firefox.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/src/views/Mesh.vue

@@ -350,7 +350,7 @@ function updateKeyboardInset() {
 
 onMounted(async () => {
   window.addEventListener('resize', handleResize)
-  document.addEventListener('click', handleDocClickForMenu)
+  document.addEventListener('pointerdown', handleDocClickForMenu)
   window.addEventListener('archipelago:share-to-mesh', loadPendingFromSession)
   if (window.visualViewport) {
     window.visualViewport.addEventListener('resize', updateKeyboardInset)
@@ -403,7 +403,7 @@ onMounted(async () => {
 
 onUnmounted(() => {
   window.removeEventListener('resize', handleResize)
-  document.removeEventListener('click', handleDocClickForMenu)
+  document.removeEventListener('pointerdown', handleDocClickForMenu)
   window.removeEventListener('archipelago:share-to-mesh', loadPendingFromSession)
   if (window.visualViewport) {
     window.visualViewport.removeEventListener('resize', updateKeyboardInset)
@@ -1337,8 +1337,8 @@ function closeAttachMenuOnOutsideClick(ev: MouseEvent) {
   const target = ev.target as HTMLElement
   if (!target.closest('.mesh-attach-menu-anchor')) showAttachMenu.value = false
 }
-onMounted(() => document.addEventListener('click', closeAttachMenuOnOutsideClick))
-onUnmounted(() => document.removeEventListener('click', closeAttachMenuOnOutsideClick))
+onMounted(() => document.addEventListener('pointerdown', closeAttachMenuOnOutsideClick))
+onUnmounted(() => document.removeEventListener('pointerdown', closeAttachMenuOnOutsideClick))
 const attachError = ref<string | null>(null)
 const fetchingCids = ref<Set<string>>(new Set())
 const fetchedUrls = ref<Map<string, string>>(new Map())