fix(library): resolve root folder rename, open in explorer, open at location centering, UPDATE rescan bug, and optimize scan RAM memory usage

docker/frontend/src/Library.tsx

@@ -2094,18 +2094,20 @@ function Catalogue() {
           {menu.folder ? (
             ready.has(menu.folder.name) ? (
             <>
-              <button
-                type="button"
-                className="lib-menu-item"
-                data-key={`lib-rename-${menu.folder.name}`}
-                onClick={() => {
-                  setMenu(null);
-                  void rename(menu.folder!);
-                }}
-              >
-                <span className="lib-menu-icon" aria-hidden="true">✎</span>
-                {t('lib.rename')}
-              </button>
+              {!menu.root ? (
+                <button
+                  type="button"
+                  className="lib-menu-item"
+                  data-key={`lib-rename-${menu.folder.name}`}
+                  onClick={() => {
+                    setMenu(null);
+                    void rename(menu.folder!);
+                  }}
+                >
+                  <span className="lib-menu-icon" aria-hidden="true">✎</span>
+                  {t('lib.rename')}
+                </button>
+              ) : null}
               {/* Three things can be asked of a roll: bring it up to date, read it
                   from the top again, or leave it — and the last only of the
                   reading that is this roll's, or of the request for it that is
@@ -2271,11 +2273,19 @@ function Catalogue() {
               const folderPath = photo.dir ? `${photo.folder}/${photo.dir}` : photo.folder;
               const fullPath = `${folderPath}/${photo.name}`;
               try {
+                const res = await api.openExplorer(fullPath).catch(() => null);
+                if (res?.ok) {
+                  setNote(t('lib.scanned', { folder: fullPath, added: 0, total: 1 }));
+                } else if (navigator.clipboard) {
+                  await navigator.clipboard.writeText(fullPath);
+                  setNote(t('lib.copiedPath', { path: fullPath }));
+                }
+              } catch {
                 if (navigator.clipboard) {
                   await navigator.clipboard.writeText(fullPath);
                   setNote(t('lib.copiedPath', { path: fullPath }));
                 }
-              } catch {}
+              }
             }}
           >
             <span className="lib-menu-icon" aria-hidden="true">📁</span>
@@ -2300,6 +2310,14 @@ function Catalogue() {
                 }
                 return next;
               });
+              setTimeout(() => {
+                const el = document.querySelector(`[data-key="lib-folder-${targetNode}"]`) || document.querySelector(`[data-key="lib-folder-${photo.folder}"]`);
+                if (el) {
+                  el.scrollIntoView({ behavior: 'smooth', block: 'center' });
+                  el.classList.add('lib-folder-highlight');
+                  setTimeout(() => el.classList.remove('lib-folder-highlight'), 2000);
+                }
+              }, 120);
             }}
           >
             <span className="lib-menu-icon" aria-hidden="true">🎯</span>
@@ -2385,7 +2403,7 @@ function TileImg({ src, rot, onPick, title }: { src: string; rot: number; onPick
 
 // One object URL per tile, made when the row does and dropped with it: a folder
 const globalThumbUrls = new Map<string, { url: string; blob: Blob }>();
-const GLOBAL_URL_MAX = 2500;
+const GLOBAL_URL_MAX = 600;
 
 function cacheObjectUrl(id: string, blob: Blob): string {
   const existing = globalThumbUrls.get(id);