improve: Immich cloud filter and optimize

docker/frontend/src/engine/library.ts

@@ -417,7 +417,18 @@ export function bySourceThenName(a: LibraryFolder, b: LibraryFolder): number {
 }
 
 export function cachedFolders(): LibraryFolder[] {
-  return cachedFoldersList ?? [];
+  if (cachedFoldersList) return cachedFoldersList;
+  try {
+    const raw = sessionStorage.getItem('rc_cached_folders');
+    if (raw) {
+      const parsed = JSON.parse(raw);
+      if (Array.isArray(parsed) && parsed.length > 0) {
+        cachedFoldersList = parsed;
+        return cachedFoldersList;
+      }
+    }
+  } catch {}
+  return [];
 }
 
 export async function listFolders(): Promise<LibraryFolder[]> {
@@ -425,6 +436,15 @@ export async function listFolders(): Promise<LibraryFolder[]> {
     const rows = await ask<LibraryFolder[]>(FOLDERS, 'readonly', (s) => s.getAll());
     const sorted = rows.sort(bySourceThenName);
     cachedFoldersList = sorted;
+    try {
+      const slim = sorted.map((f) => ({
+        name: f.name,
+        label: f.label,
+        source: f.source,
+        server: f.server,
+      }));
+      sessionStorage.setItem('rc_cached_folders', JSON.stringify(slim));
+    } catch {}
     return sorted;
   } catch {
     return cachedFoldersList ?? [];
@@ -2027,7 +2047,18 @@ function pump(): void {
 let cached: LibraryPhoto[] | null = null;
 
 export function cachedPhotos(): LibraryPhoto[] {
-  return cached ?? [];
+  if (cached) return cached;
+  try {
+    const raw = sessionStorage.getItem('rc_cached_photos');
+    if (raw) {
+      const parsed = JSON.parse(raw);
+      if (Array.isArray(parsed) && parsed.length > 0) {
+        cached = parsed;
+        return cached;
+      }
+    }
+  } catch {}
+  return [];
 }
 
 export function clearLibraryCache(): void {
@@ -2418,7 +2449,24 @@ export async function readPhotos(folder?: string): Promise<LibraryPhoto[] | null
       if (chunk.length < READ_CHUNK) break;
     }
     rows.sort((a, b) => b.taken - a.taken);
-    if (!folder) cached = rows;
+    if (!folder) {
+      cached = rows;
+      try {
+        const slim = rows.slice(0, 300).map((p) => ({
+          id: p.id,
+          folder: p.folder,
+          name: p.name,
+          taken: p.taken,
+          addedAt: p.addedAt,
+          dir: p.dir,
+          star: p.star,
+          server: p.server,
+          remoteId: p.remoteId,
+          rot: p.rot,
+        }));
+        sessionStorage.setItem('rc_cached_photos', JSON.stringify(slim));
+      } catch {}
+    }
     return rows;
   } catch {
     return null;