fix(library): fix folder context menu lookup and ready check

docker/frontend/src/Library.tsx

@@ -1637,7 +1637,8 @@ function Catalogue() {
                     }}
                   >
                     {rows.map((n) => {
-                      const folder = folders.find((f) => f.name === n.key.split('/')[0]) ?? null;
+                      const rootKey = n.key.split('/')[0];
+                      const folder = folders.find((f) => (f.name || '').replace(/\\/g, '/') === rootKey || f.name === rootKey) ?? null;
                       // The row that says a reading is under way is the folder the
                       // reading stands in — not the folder it was pointed at, which
                       // would be the same row for the whole of an afternoon while
@@ -2108,7 +2109,7 @@ function Catalogue() {
             </button>
           ) : null}
           {menu.folder ? (
-            ready.has(menu.folder.name) ? (
+            (ready.has(menu.folder.name) || ready.has((menu.folder.name || '').replace(/\\/g, '/'))) ? (
             <>
               {!menu.root ? (
                 <button