✨ Persist asset search query when switching sidebar tabs (#8985)

When users switch between the Layers and Assets sidebar tabs, the
`assets-toolbox*` component unmounts and its local `use-state` is
discarded, so the search query and section filter are lost.

Lift the search term and section filter into a per-file, in-memory
session atom that survives tab switches but doesn't leak across files
or persist across reloads. Ordering and list-style continue to use
localStorage as before.

Closes #2913

Signed-off-by: eureka0928 <meobius123@gmail.com>
Co-authored-by: Andrey Antukh <niwi@niwi.nz>

CHANGES.md

@@ -64,6 +64,7 @@
 
 - Access Tokens look & feel refinement [Taiga #13114](https://tree.taiga.io/project/penpot/us/13114)
 - Enhance readability of applied tokens in plugins API [Taiga #13714](https://tree.taiga.io/project/penpot/issue/13714)
+- Persist asset search query and section filter when switching sidebar tabs (by @eureka0928) [Github #2913](https://github.com/penpot/penpot/issues/2913)
 
 ### :bug: Bugs fixed
 

frontend/src/app/main/ui/workspace/sidebar/assets.cljs

@@ -70,16 +70,24 @@
   [v a b]
   (if (= v a) b a))
 
+;; Per-file, session-scoped (in-memory only) so the search term and section
+;; filter survive switching between the Layers and Assets sidebar tabs without
+;; leaking across files or persisting across reloads.
+(defonce ^:private session-filters*
+  (atom {}))
+
 (mf/defc assets-toolbox*
   {::mf/wrap [mf/memo]}
   [{:keys [size file-id]}]
   (let [read-only?     (mf/use-ctx ctx/workspace-read-only?)
         filters*       (mf/use-state
-                        {:term ""
-                         :section "all"
-                         :ordering (dwa/get-current-assets-ordering)
-                         :list-style (dwa/get-current-assets-list-style)
-                         :open-menu false})
+                        (fn []
+                          (-> (or (get @session-filters* file-id)
+                                  {:term ""
+                                   :section "all"})
+                              (assoc :ordering (dwa/get-current-assets-ordering)
+                                     :list-style (dwa/get-current-assets-list-style)
+                                     :open-menu false))))
         filters        (deref filters*)
         term           (:term filters)
         list-style     (:list-style filters)
@@ -162,6 +170,9 @@
             :id      "typographies"
             :handler on-section-filter-change}])]
 
+    (mf/with-effect [file-id term section]
+      (swap! session-filters* assoc file-id {:term term :section section}))
+
     [:article  {:class (stl/css :assets-bar)}
      [:div {:class (stl/css :assets-header)}
       (when-not ^boolean read-only?