♿️(frontend) improve left panel accessibility (#1262)

Improve overall accessibility of the left panel:
- ⚡️(frontend) make LeftPanelTargetFilter accessible and use Box as nav
- ⚡️(frontend) improve accessibility in left panel components
- ✅(e2e) fix e2e test to expect aria-current instead of aria-selected
- ✨(frontend) add semantic ul/li to LeftPanel
- ✨(frontend) improve favorite item a11y and update e2e test accordingly

CHANGELOG.md

@@ -13,6 +13,8 @@ and this project adheres to
 - ⚡️(frontend) improve accessibility:
   - #1248
   - #1235
+  - #1255
+  - #1262
 
 ## [3.5.0] - 2025-07-31
 
@@ -31,9 +33,7 @@ and this project adheres to
 - ♻️(frontend) redirect to doc after duplicate #1175
 - 🔧(project) change env.d system by using local files #1200
 - ⚡️(frontend) improve tree stability #1207
-- ⚡️(frontend) improve accessibility
-  - #1232
-  - #1255
+- ⚡️(frontend) improve accessibility #1232
 - 🛂(frontend) block drag n drop when not desktop #1239
 
 ### Fixed