fix(board): handle submit errors + tolerate tag fetch failure

app/pages/board.vue

@@ -93,6 +93,7 @@ definePageMeta({ middleware: ['members-auth'] })
 const { memberData } = useAuth()
 const { posts, loading, fetchPosts, createPost, updatePost, deletePost } = useBoardPosts()
 const { channels, fetchChannels } = useBoardChannels()
+const toast = useToast()
 
 const cooperativeTags = ref([])
 const showTagsDrawer = ref(false)
@@ -150,12 +151,20 @@ const handleDelete = async (post) => {
 }
 
 const handleSubmit = async (body) => {
+  try {
     if (editingPost.value) {
       await updatePost(editingPost.value._id, body)
     } else {
       await createPost(body)
     }
     closeForm()
+  } catch (err) {
+    toast.add({
+      title: editingPost.value ? 'Failed to update post' : 'Failed to create post',
+      description: err?.data?.message || err?.message || 'Please try again.',
+      color: 'red',
+    })
+  }
 }
 
 const loadTags = async () => {
@@ -174,7 +183,7 @@ useHead({
 })
 
 onMounted(async () => {
-  await Promise.all([loadTags(), fetchPosts(), fetchChannels()])
+  await Promise.allSettled([loadTags(), fetchPosts(), fetchChannels()])
 })
 </script>