chore: upgrade i18next 26, prettier 3, fontsource-variable, domhandler 6, lint-staged 17

- i18next 23->26 + react-i18next 15->17
- prettier 2->3, reformat all files
- replace @fontsource/inter with @fontsource-variable/inter 5, update import path
- domhandler 5->6 (aligns with transitive deps)
- lint-staged 16->17

src/app/pages/client/direct/Direct.tsx

@@ -195,10 +195,10 @@ export function Direct() {
             if (a.size !== b.size) return false;
             for (const id of a) if (!b.has(id)) return false;
             return true;
-          }
+          },
         ),
-      []
-    )
+      [],
+    ),
   );
   const navigate = useNavigate();
 
@@ -224,7 +224,7 @@ export function Direct() {
   });
 
   const handleCategoryClick = useCategoryHandler(setClosedCategories, (categoryId) =>
-    closedCategories.has(categoryId)
+    closedCategories.has(categoryId),
   );
 
   return (
@@ -289,7 +289,7 @@ export function Direct() {
                         linkPath={getDirectRoomPath(getCanonicalAliasOrRoomId(mx, roomId))}
                         notificationMode={getRoomNotificationMode(
                           notificationPreferences,
-                          room.roomId
+                          room.roomId,
                         )}
                       />
                     </VirtualTile>