Add settings, cloud places, and optional archive-content indexing.

Keep official clients in charge of sync while Explorer can group locations, persist UI prefs, and list zip/rar/7z members without extracting them.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/Explorer.Domain/Abstractions/IIndexStore.cs

@@ -30,6 +30,7 @@ public interface ISourceStore
     Task UpdateUsnAsync(long id, long journalId, long nextUsn, CancellationToken cancellationToken = default);
     Task UpdateIndexedAsync(long id, DateTimeOffset utc, long generation, CancellationToken cancellationToken = default);
     Task SetLastSeenAsync(long id, string rootPath, DateTimeOffset utc, CancellationToken cancellationToken = default);
+    Task DeleteAsync(long id, CancellationToken cancellationToken = default);
 }
 
 public interface IEntryStore
@@ -48,6 +49,7 @@ public interface IEntryStore
     Task MarkSourceOfflineAsync(long sourceId, CancellationToken cancellationToken = default);
     Task MarkSourceOnlinePresentAsync(long sourceId, CancellationToken cancellationToken = default);
     Task TombstoneAsync(long id, DateTimeOffset utc, CancellationToken cancellationToken = default);
+    Task TombstoneByPathPrefixAsync(long sourceId, string pathRelPrefix, DateTimeOffset utc, CancellationToken cancellationToken = default);
     Task DeleteExpiredTombstonesAsync(DateTimeOffset cutoffUtc, CancellationToken cancellationToken = default);
     Task RenameSubtreePathAsync(long sourceId, string oldPathRel, string newPathRel, CancellationToken cancellationToken = default);
     Task<long> CountPresentAsync(long sourceId, CancellationToken cancellationToken = default);