Match saved bookmarks against existing collections and remove missing

src/Logic/PasswordStoreService.cs

@@ -44,6 +44,38 @@ public class PasswordStoreService : IPasswordStoreService
 
     public IEnumerable<PasswordStore> GetAll()
     {
-        return repository.GetAll();
+        List<PasswordStore> jsonResults = repository.GetAll();
+
+        //Validate against actual secret collections
+        var collections = secretService.GetCollections() ?? Enumerable.Empty<Secret.Collection>();
+
+        // Identify bookmarks that do NOT match any existing Secret collection.
+        var toDelete = new List<uint>();
+
+        foreach (var ps in jsonResults)
+        {
+            var key = string.IsNullOrWhiteSpace(ps.DisplayName) ? ps.Path : ps.DisplayName;
+            if (string.IsNullOrWhiteSpace(key))
+            {
+                // No reasonable key to match — schedule for deletion
+                toDelete.Add(ps.ID);
+                continue;
+            }
+
+            var exists = collections.Any(c => string.Equals(c.Label, key, StringComparison.OrdinalIgnoreCase));
+            if (!exists)
+            {
+                toDelete.Add(ps.ID);
+            }
+        }
+
+        // Perform deletions from repository for all missing bookmarks
+        foreach (var id in toDelete)
+        {
+            repository.Delete(id);
+        }
+
+        var remaining = jsonResults.Where(ps => !toDelete.Contains(ps.ID)).ToList();
+        return remaining;
     }
 }