P2 slice 6: the viewer

`wanderbooks gui [BOOK]` finds the data root, reads settings from the
journal, the vault of the book, presence through ops/, Save a copy /
Open on every document, Save the W-9, the Export menu, and colour
schemes. One builder for the CPA package and the 1099 worksheet
(ledger-package), shared by the server and the viewer.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T3gXMVt7XJPi6ens1or9Dj

crates/ledger-store/src/lib.rs

@@ -23,17 +23,19 @@ pub mod auth;
 pub mod blob;
 pub mod chain;
 pub mod error;
+pub mod exports;
 pub mod format;
 pub mod journal;
 pub mod meta;
+pub mod ops;
 pub mod passphrase;
 pub mod reconcilable;
 pub mod root;
+pub mod saving;
 pub mod schema;
 pub mod snapshot;
 pub mod store;
 pub mod uploads;
-pub mod viewer;
 
 pub use blob::BlobStore;
 pub use error::StoreError;