notebook: don't attempt to get a time from an empty string, use sent …

…value where possible

ui/src/diary/DiaryComment.tsx

@@ -1,7 +1,6 @@
 /* eslint-disable react/no-unused-prop-types */
 import React from 'react';
 import { BigInteger } from 'big-integer';
-import { daToUnix } from '@urbit/api';
 import { format } from 'date-fns';
 import Author from '@/chat/ChatMessage/Author';
 // eslint-disable-next-line import/no-cycle
@@ -32,7 +31,7 @@ const DiaryComment = React.memo<
     ) => {
       const { cork, memo } = quip;
       const flag = useChannelFlag();
-      const unix = new Date(daToUnix(time));
+      const unix = new Date(quip.memo.sent);
       const normalizedContent: ChatStory = {
         ...memo.content,
         block: memo.content.block.filter(

ui/src/diary/DiaryNote.tsx

@@ -200,15 +200,18 @@ export default function DiaryNote({ title }: ViewProps) {
   const { quips } = note.seal;
   const quipArray = Array.from(quips).reverse(); // natural reading order
   const canWrite = canWriteChannel(perms, vessel, group?.bloc);
-  const groupedQuips = setNewDays(
-    groupQuips(noteId, quipArray, brief).sort(([a], [b]) => {
-      if (sort === 'asc') {
-        return a.localeCompare(b);
-      }
+  const groupedQuips =
+    noteId !== ''
+      ? setNewDays(
+          groupQuips(noteId, quipArray, brief).sort(([a], [b]) => {
+            if (sort === 'asc') {
+              return a.localeCompare(b);
+            }
 
-      return b.localeCompare(a);
-    })
-  );
+            return b.localeCompare(a);
+          })
+        )
+      : [];
 
   return (
     <Layout