🐛 Fix grid item date tooltip showing deletion text on non-deleted files (#11161)

The grid-item-metadata* component always used :will-be-deleted-at (falling
back to :modified-at) and always showed the "Will be deleted %s" tooltip,
even for files in the Recent tab that have no deletion date.

Now the component branches on the presence of :will-be-deleted-at:
- Deleted files: show the deletion timeago with the existing
  "Will be deleted %s" tooltip.
- Regular files: show :modified-at timeago with a new
  "Last modified %s" tooltip key (dashboard.grid.last-modified-at).

Closes #10873

Co-authored-by: Andrey Antukh <niwi@niwi.nz>

frontend/src/app/main/ui/dashboard/grid.cljs

@@ -239,12 +239,18 @@
 (mf/defc grid-item-metadata*
   {::mf/private true}
   [{:keys [file layout]}]
-  (let [time (ct/timeago (or (:will-be-deleted-at file)
-                             (:modified-at file)))]
-    [:span {:class (stl/css-case :grid-item-date (= layout :grid)
-                                 :list-item-date (= layout :list))
-            :title (tr "dashboard.deleted.will-be-deleted-at" time)}
-     time]))
+  (let [deleted-at (:will-be-deleted-at file)
+        date-class (stl/css-case :grid-item-date (= layout :grid)
+                                 :list-item-date (= layout :list))]
+    (if deleted-at
+      (let [time (ct/timeago deleted-at)]
+        [:span {:class date-class
+                :title (tr "dashboard.deleted.will-be-deleted-at" time)}
+         time])
+      (let [time (ct/timeago (:modified-at file))]
+        [:span {:class date-class
+                :title (tr "dashboard.grid.last-modified-at" time)}
+         time]))))
 
 (defn create-counter-element
   [_element file-count]

frontend/translations/en.po

@@ -453,10 +453,14 @@ msgstr "Delete team"
 msgid "dashboard.deleted.empty-state-description"
 msgstr "Your trash is empty. Deleted files and projects will appear here."
 
-#: src/app/main/ui/dashboard/grid.cljs:247
+#: src/app/main/ui/dashboard/grid.cljs:252
 msgid "dashboard.deleted.will-be-deleted-at"
 msgstr "Will be deleted %s"
 
+#: src/app/main/ui/dashboard/grid.cljs:256
+msgid "dashboard.grid.last-modified-at"
+msgstr "Last modified %s"
+
 #: src/app/main/ui/dashboard/file_menu.cljs:329, src/app/main/ui/workspace/main_menu.cljs:732
 msgid "dashboard.download-binary-file"
 msgstr "Download Penpot file (.penpot)"